Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS2804149 A
Publication typeGrant
Publication dateAug 27, 1957
Filing dateDec 12, 1956
Priority dateDec 12, 1956
Publication numberUS 2804149 A, US 2804149A, US-A-2804149, US2804149 A, US2804149A
InventorsKile Hershel S
Original AssigneeJohn R Donaldson
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Oil well heater and reviver
US 2804149 A
Images(2)
Previous page
Next page
Description  (OCR text may contain errors)

Aug. 27, 1957 H. s. KlLE OIL WELL HEATER AND REVIVER 2 Sheeils-Sheet 1 Fig. 5

Filed Dec. 12. 1955 Harshe/ 5' Kile INVENTOR. 4015; BY all! Aug. 27, 1957 l- |.S.KILE OILWELLHEATERANDREVIVER 2 Sheets-Sheet 2 Filed Dec. 12,. 1956 Fly 3 INVENTOR.

r sates OIL WELL HEATER AND REVIVER Hershel S. Kile, Santa Cruz, Califi, assignor of fifty percent to John R. Donaldson, Salinas, Calif.

This invention comprises a novel and useful oil well heater and reviver, and particularly relates to an electrical heating device for location in an oil well to melt and remove the paraflins, tars, asphalts, and the like therein which block and impede flow of oil from the formation into the well bore.

The present application contains subject matter found in my prior copending application, Serial No. 390,663, filed November 6, 1953, for Oil Well Reviver, and also includes subject matter constituting an improvement thereover.

In the operation of oil wells, it is found that after a period of time the wells frequently become choked by an accumulation of paraflins, tars, asphalts, and the like, which are present in the more volatile petroleum fluids in a productive formation, and which condense out of such fluids during the flow of the latter from the productive formation into the well bore, and which thereby substantially block the pores or interstices of the formation adjacent to the well so that the production of the well is materially decreased.

Various methods have heretofore been proposed for heating and removing these parafiins and removing them from the well so that the production of the well may be restored.

According to the present invention, a heating and agitating device is provided which may be mounted on a collar attached to the bottom of the well casing and extending into the vicinity of the blocked formation so that electrical current, supplied to the heating device and the agitating members or blades thereof may be utilized to produce heat for melting the parafiin or other deposits so that the pressure in the strata adjacent to the well may again cause a flow of petroleum fluid through the formation and into the well bore.

It is accordingly an object of the invention to provide an improved well heater for efficiently and effectively applying heat to a well bore in a manner effective to heat and dissolve paraflin and similar deposits and incrustations which obstruct how of the fluid from the formation into the well bore.

It is a further object of the invention to provide an electrical heating device in accordance with the preceding objects wherein the electrical heating elements are susceptible of a random rotary movement whereby to prevent carbonaceous deposits and other deposits from the petroleum flowing into the well from forming thereon and thereby detrimentally affecting the flow of heating current through the device.

It is a further important object of the invention to provide a device in accordance with the foregoing objects wherein novel and effective electrical heating elements are provided and which elements are capable of a random rotary or oscillatory movement to thereby contribute to their useful life under the adverse conditions of operation encountered in well bores.

These, together with other objects and advantages which will become subsequently apparent, reside in the details of construction and operation as more fully hereatent inafter described and claimed, reference being had to the accompanying drawings forming a part hereof, wherein like numerals refer to like parts throughout, and in which:

Figure l is a fragmentary sectional vertical elevational view of a well bore with parts broken away and shown in section, and showing an embodiment of an apparatus in accordance with this invention operatively applied to the lower end of the casing of the well bore;

Figure 2 is a view in end elevation of the apparatus shown in Figure 3, a portion of the apparatus being shown in vertical section;

Figure 3 is a vertical longitudinal sectional view through the apparatus of Figure 2 taken substantially upon the plane indicated by the section line 3--3 thereof;

Figure 4 is a horizontal sectional view taken substantially upon the plane indicated by the section line 44 of Figure 3 and showing the manner in which the heating and agitating elements of the apparatus are supported by a sleeve which is adapted to be secured to the lower end of a well casing;

Figure 5 is a horizontal sectional view taken substantially on the plane indicated by the section line 5-5 of Figure 3 and illustrating the construction of one of the movable electrical heating elements and agitating means of the device; and

Figure 6 is a perspective view of one of the movable heating elements.

In the exemplary embodiment according to the invention, a casing Ml is provided in a well bore with a tubing 12 through which oil may flow or may be pumped as may be desired. The usual pits 14 and 1.6 are provided adjacent the casing head and a filler of cementitious material 18 is provided adjacent the top of the casing as is well known. Flow lines 20 and 22 are connected to the tubing 12 to conduct the material pumped from the well to any suitable destination. The above described construction is standard and in itself forms no part of the present invention.

The heater and reviver according to the present invention comprises a sleeve 26 of any desired size, but preferably of a suitable size to pass through the casing 10. This sleeve is adapted to be secured to the lower end of the casing 10 and to be supported thereby in a manner which forms no part of the present invention, but which is set forth and claimed in my copending application, Serial No. 677,289 filed August 14, 1957.

At its lower end, it is preferred to provide the sleeve 26 with an internal thread as shown at 23 in Figures 2 and 3 which is adapted to receive and support a dielectric supporting member 30 which is externally threaded, as at 32, whereby the same may be engaged with the threads 28 of the sleeve 26. As shown in Figure 4, the member 30 consists of an annulus having a central opening or passage therethrough, and a diametrically disposed integral bar 33 extends across this passage. This bar is provided with a central aperture 34 and a pair of side apertures 36 and 38 for supporting the heating elements of the device as set forth hereinafter.

At this point, it should be understood that although the above described and herein illustrated manner of supporting the heater from the casing 10 is considered to be extremely effective and possesses numerous advantages, it is within the purview of this invention to employ any other suitable mounting and supporting means as may be desired.

Supported by the insulating bar 33 is a central electrical terminal 46 in the form of a substantially straight rod of bronze or other suitable material and which is externally threaded, as at 42, at its upper end which extends through the previously mentioned central bore or passage Suitable lock nuts 44 serve to clamp this terminal rigidly to the bar 33 in a depending manner,

with the upper portion of the terminal extending above the bar for the reception of a binding post lock nut 46 by means of which an electric conductor 48 may be electrically connected to the upper end of the terminal 46. t A second pair of electric terminals 50 and 52 are simllarly connected at their upper ends to the supporting member 32 and extend through the bores or passages 36 and 38, respectively, and in turn are connected to electric conductors 54 and 56.

As will be seen best from Figure 3, the upper ends of the terminals 50 and 52 are offset inwardly towards each other in a parallel relation in order to render more compact the attachment of the three terminals to the support member 33, while their lower ends 58 and 60 are inturned towards each other. A substantially T-shaped dielectric block 62 is provided having sockets or recesses for receiving the two inturned ends 53 and 60 of the pair of side terminals 50 and 52, and the lower end of the central terminal 40, to hold the same in securely fixed, spaced relation, and out of electrical contact with each other.

The three conductors 48, 54 and 56, as will be apparent from Figure 1, are received within a suitable cable 64 which may preferably be a lead sheathed cable which extends up the casing 10, will extend through a suitable aperture in the top of the casing and be connected to a control panel 66 mounted on a pole or other support 68 adjacent the top of the casing 10 and current will be supplied thereto through a cable 7 from any suitable source of supply. Preferably, the current supplied from the control panel 66 through the cable 64 is a three-phase current such as 220 volts, 440 volts, or the like, in order that there may be a potential or diflerence between the central terminal 40 and each of the other terminals 50 and 52.

As so far described, it will be understood that the stationary terminals 40, 50 and 52 comprise stationary electrical terminals for the heating device and the latter is provided with movable terminals cooperating therewith in a manner to be now set forth.

Referring now specifically to Figure 3, it will be seen that the central axial terminal 40 is provided with a plurality of spaced collars 80, each provided with a setscrew 82 whereby the collar may be secured to the terminal 40 in a longitudinally adjusted position. A plurality of electrically conductive spacing sleeves 84- are snugly received on the terminal 40 and are abutted at their opposite ends by adjacent collars 80 to thus provide a rigid assembly. Journaled upon each of the sleeves 84- is the tubular hub portion 86, also of bronze or other suitable electrically conductive material, and which carries a blade indicated generally by the numeral 88.

It is important to note at this point that by means of its supporting hub, collar or bushing 6, each of the blades 88 is mounted for free and random rotation or movement upon the spacer sleeve $4 carried by the terminal 40. Also, there is a slight axial movement permissible for each of the blades upon its spacer sleeve, as will be apparent from Figure 3.

Referring now particularly to Figures and 6, it will be seen that the form of blade 88, which blades constitute movable terminals of the heating device, consists of a substantially flat rectangular plate 9i? which have the triangular corners 92 at the four corners of the rectangle upturned at their ends along the medial line of the rectangular plate and the meeting edges 94 of the up turned triangular corners are rigidly connected together by any suitable means such as by welding or brazing. Preferably, these turned up corners are provided with apertures 96 therethrough.

The dimensions of the blades 88 are such that when the same are mounted as shown in Figure 3 upon the central terminal .0, the outer edges M of the blades will be in slightly spaced relation to the stationary terminals 50 and 52 to thus provide an are between each blade and the terminals when electric current is supplied to the terminals. These blades are of a sturdy construction inasmuch as the flat material of the plate is reinforced by the upturned and connected triangular corner portions 92. This form of blade is particularly adapted for use in wells which, during operation, will have a very great rate of flow or be subjected to a very great pressure of the flowing fluid therethrough after they are producing and after the paraffin deposits have been melted from the face of the well bore.

The operation of the device is as follows: After a well has ceased to flow or has had its flow diminished by the forming of paraflin or like deposits upon the face of the formation in the well bore, this apparatus is lowered through the well casing, the tubing 12 being removed for that purpose, and secured in place at the lower end of the tubing in any suitable manner. Thereafter the tubing is replaced and electrical energy is supplied by the conductors 43, 54 and 56 to the stationary terminals 48, 50 and 52. Owing to the presence of the fluid in the well bore, there will be suflicient conductivity to permit the electric current to jump from the ends of each of the blades'iiii to the adjacent terminals 50 and 52. Thus, there are provided a large number of arcs between the central terminal and the two outer terminals, which, passing through the fluid in the well, will quickly and eifectively heat the same, this heat melting and dissolving the paraffin or similar obstructing deposits on the face of the formation in the well bore. As soon as these deposits begin to be dissolved or removed, the pressure of the fluid in the productive formation will force the gas and oil from the interstices of the formation into the well bore and, rising upwardly in the same, will pass upwardly through the flow line for recovery. Owing to the journalling of each of the blades for free rotation or pivotal movement upon the central terminal 40, there will be a random movement imparted to these blades by the flowing fluid from the well. This in turn will oscillate, turn and/or rotate the blades, and during such movement each time the blade registers with the electrodes 56) or 52 current will flow therebetween, thereby continuing the heating eifect.

While the precise operation of the electrical heating is not definitely and completely understood, it is contemplated that owing to the random movement of the blades which form the movable electrical contacts of the apparatus, that arcing of various lengths and at irregular and varying intervals will be set up by the random movement of the blades.

If the blades were held stationary, carbonizing of the petroleum under the heat of the device would soon set up deposits between the blades and the stationary terminals which would effectively prevent the flow of current and the heating effect of the arcs. The random movement of the blades serves to prevent the same and thus to maintain the effectiveness of the electrical heating arcs for substantially indefinite periods of time. In addition, the agitation or movement of .the blades tends to set up a turbuknee or swirling movement of the oil, thereby facilitating the melting of paraffin by contact of the heated oil therewith, and still further accelerating the removal of paraffin from the formation.

As will be readily understood, the dissolved paraflin will pass upward through the flow tubing 12 with the restored flow of oil and thus be removed from the well bore.

It will be understood that the principles of this invention comprehend within their scope such obvious modifications as the omission of the conductor 48 and the supply of current to the central electrode 40 whereby the current will flow between the electrodes 50 and 52 by means of the interposed rotary blades 88. In such instance, the member 4-0 will serve solely as an axle or spindle for rotatably supporting the members 88.

It is also within the purview of this invention to omit one of the stationary electrodes 50 or 52, whereby current will flow from the remaining side electrode to the central electrode iii by means of the rotary blades 88.

The foregoing is considered as illustrative only of the principles of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described, and accordingly all suitable modifications and equivalents may be resorted to, falling within the scope of the invention as claimed.

What is claimed as new is as follows:

1. An oil well heater comprising a support, a pair of electrodes and a central electrode secured to said support and insulated from each other, means for supplying electric current to said electrodes, a plurality of electrically conductive movable terminal members each journalled upon said central electrode for random rotary movement thereon and in electrical contact therewith, said movable terminal members being in spaced operative relation to said pair of electrodes whereby to establish electric arcs therebetween, the random movement of said terminal members intermittently making and breaking said arcs and preventing the forming of deposits of parafiin and the like between said movable members and said pair of electrodes.

2. An oil Well heater comprising a support, a pair of electrodes and a central electrode secured to said support and insulated from each other, means for supplying electric current to said electrodes, a plurality of electrically conductive movable terminal members each journalled upon said central electrode for random rotary movement thereon and in electrical contact therewith, said movable terminal members being in spaced operative relation to said pair of electrodes whereby .to establish electric arcs therebetween, the random movement of said terminal members intermittently making and breaking said arcs and preventing the forming of deposits of parafiin and the like between said movable members and said pair of electrodes, means for securing said heater to a well casing in a well bore.

3. The combination of claim 1 including a dielectric member securing the lower ends of said electrodes in rigid and electrically spaced relation.

4. The combination of claim 1 wherein said terminal members comprise fiat blades having their side edges adjacent their ends upturned and rigidly secured together.

5. The combination of claim 4 including spacer sleeves on said central terminal, said blades being each journalled upon one of said spacer sleeves.

6. The combination of claim 1 wherein said central electrode comprises a shaft, a plurality of spaced collars secured to said shaft, each of said terminal members being journaled upon said shaft between a pair of adjacent collars.

7. The combination of claim 1 wherein said movable terminals each comprises a blade consisting of a fiat rectangular body, the corners of said body having portions upturned and meeting on a medial plane of said body whereby to provide vertical edges and side surfaces inclined to the surface of said body References Cited in the tile of this patent UNITED STATES PATENTS 2,213,950 Crites Sept. 10, 1940

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2213950 *Jul 11, 1938Sep 10, 1940Phillips Petroleum CoThermally controlled bottom hole choke
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4886118 *Feb 17, 1988Dec 12, 1989Shell Oil CompanyPyrolysis; enhanced oil recovery
US5255742 *Jun 12, 1992Oct 26, 1993Shell Oil CompanyHeat injection process
US5297626 *Jun 12, 1992Mar 29, 1994Shell Oil CompanyOil recovery process
US6581684Apr 24, 2001Jun 24, 2003Shell Oil CompanyIn Situ thermal processing of a hydrocarbon containing formation to produce sulfur containing formation fluids
US6588504Apr 24, 2001Jul 8, 2003Shell Oil CompanyConversion of hydrocarbons to produce hydrocarbons, hydrogen, and/or novel product streams from underground coal formations; pyrolysis
US6591906Apr 24, 2001Jul 15, 2003Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation with a selected oxygen content
US6591907Apr 24, 2001Jul 15, 2003Shell Oil CompanyPyrolysis
US6607033Apr 24, 2001Aug 19, 2003Shell Oil CompanyIn Situ thermal processing of a coal formation to produce a condensate
US6609570Apr 24, 2001Aug 26, 2003Shell Oil CompanyIn situ thermal processing of a coal formation and ammonia production
US6688387Apr 24, 2001Feb 10, 2004Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation to produce a hydrocarbon condensate
US6698515Apr 24, 2001Mar 2, 2004Shell Oil CompanyIn situ thermal processing of a coal formation using a relatively slow heating rate
US6702016Apr 24, 2001Mar 9, 2004Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation with heat sources located at an edge of a formation layer
US6708758Apr 24, 2001Mar 23, 2004Shell Oil CompanyIn situ thermal processing of a coal formation leaving one or more selected unprocessed areas
US6712135Apr 24, 2001Mar 30, 2004Shell Oil CompanyIn situ thermal processing of a coal formation in reducing environment
US6712136Apr 24, 2001Mar 30, 2004Shell Oil CompanyProviding heat to the formation; controlling the heat from the heat source such that an average temperature within at least a majority of the selected section of the formation is less than about 375 degrees c.
US6712137Apr 24, 2001Mar 30, 2004Shell Oil CompanyHeat exchanging to superimpose heat
US6715546Apr 24, 2001Apr 6, 2004Shell Oil CompanyChemical and/or physical properties of hydrocarbon material within a subterranean formation may need to be changed to allow hydrocarbon material to be more easily removed
US6715547Apr 24, 2001Apr 6, 2004Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation to form a substantially uniform, high permeability formation
US6715548Apr 24, 2001Apr 6, 2004Shell Oil CompanyElectrical heaters may be used to heat the subterranean formation by radiation and/or conduction
US6715549Apr 24, 2001Apr 6, 2004Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation with a selected atomic oxygen to carbon ratio
US6719047Apr 24, 2001Apr 13, 2004Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation in a hydrogen-rich environment
US6722429Apr 24, 2001Apr 20, 2004Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation leaving one or more selected unprocessed areas
US6722430Apr 24, 2001Apr 20, 2004Shell Oil CompanyIn situ thermal processing of a coal formation with a selected oxygen content and/or selected O/C ratio
US6722431Apr 24, 2001Apr 20, 2004Shell Oil CompanyIn situ thermal processing of hydrocarbons within a relatively permeable formation
US6725920Apr 24, 2001Apr 27, 2004Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation to convert a selected amount of total organic carbon into hydrocarbon products
US6725921Apr 24, 2001Apr 27, 2004Shell Oil CompanyIn situ thermal processing of a coal formation by controlling a pressure of the formation
US6725928Apr 24, 2001Apr 27, 2004Shell Oil CompanyIn situ thermal processing of a coal formation using a distributed combustor
US6729395Apr 24, 2001May 4, 2004Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation with a selected ratio of heat sources to production wells
US6729396Apr 24, 2001May 4, 2004Shell Oil CompanyIn situ thermal processing of a coal formation to produce hydrocarbons having a selected carbon number range
US6729397Apr 24, 2001May 4, 2004Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation with a selected vitrinite reflectance
US6729401Apr 24, 2001May 4, 2004Shell Oil CompanySynthesis gas may be produced from the formation. synthesis gas may be used as a feed stream in an ammonia synthesis process. ammonia may be used as a feed stream in a urea synthesis process.
US6732794Apr 24, 2001May 11, 2004Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation to produce a mixture with a selected hydrogen content
US6732795Apr 24, 2001May 11, 2004Shell Oil CompanyProviding heat from one or more heat sources to at least one portion of formation; allowing heat to transfer from the one or more heat sources to a selected section of the formation; controlling the heat; producing a mixture from the formation
US6732796Apr 24, 2001May 11, 2004Shell Oil CompanyHeating section of formation with heat sources to temperature allowing generation of synthesis gas, providing synthesis gas generating fluid to section, removing synthesis gas generated, repeating for second section, blending for desired ratio
US6736215Apr 24, 2001May 18, 2004Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation, in situ production of synthesis gas, and carbon dioxide sequestration
US6739393Apr 24, 2001May 25, 2004Shell Oil CompanyIn situ thermal processing of a coal formation and tuning production
US6739394Apr 24, 2001May 25, 2004Shell Oil CompanyProviding heat and a synthesis gas generating fluid to the section to generate synthesis gas
US6742587Apr 24, 2001Jun 1, 2004Shell Oil CompanyIn situ thermal processing of a coal formation to form a substantially uniform, relatively high permeable formation
US6742588Apr 24, 2001Jun 1, 2004Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation to produce formation fluids having a relatively low olefin content
US6742589Apr 24, 2001Jun 1, 2004Shell Oil CompanyIn situ thermal processing of a coal formation using repeating triangular patterns of heat sources
US6742593Apr 24, 2001Jun 1, 2004Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation using heat transfer from a heat transfer fluid to heat the formation
US6745831Apr 24, 2001Jun 8, 2004Shell Oil CompanyMixture of hydrocarbons, h2, and/or other formation fluids may be produced from the formation. heat may be applied to the formation to raise a temperature of a portion of the formation to a pyrolysis temperature.
US6745832Apr 24, 2001Jun 8, 2004Shell Oil CompanySitu thermal processing of a hydrocarbon containing formation to control product composition
US6745837Apr 24, 2001Jun 8, 2004Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation using a controlled heating rate
US6749021Apr 24, 2001Jun 15, 2004Shell Oil CompanyPyrolysis
US6752210Apr 24, 2001Jun 22, 2004Shell Oil CompanyIn situ thermal processing of a coal formation using heat sources positioned within open wellbores
US6758268Apr 24, 2001Jul 6, 2004Shell Oil CompanyHeat exchanging, pyrolysis; monitoring temperature
US6761216Apr 24, 2001Jul 13, 2004Shell Oil CompanyPyrolysis temperature
US6763886Apr 24, 2001Jul 20, 2004Shell Oil CompanyIn situ thermal processing of a coal formation with carbon dioxide sequestration
US6769483Apr 24, 2001Aug 3, 2004Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation using conductor in conduit heat sources
US6769485Apr 24, 2001Aug 3, 2004Shell Oil CompanyIn situ production of synthesis gas from a coal formation through a heat source wellbore
US6789625Apr 24, 2001Sep 14, 2004Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation using exposed metal heat sources
US6805195Apr 24, 2001Oct 19, 2004Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation to produce hydrocarbon fluids and synthesis gas
US6820688Apr 24, 2001Nov 23, 2004Shell Oil CompanyHeat exchanging after pyrolyzation to support synthesis gas generation
US6866097Apr 24, 2001Mar 15, 2005Shell Oil CompanySuperpositioning of heaters for pyrolysis to form mixture of hydrocarbons and hydrogen; controlling pressure; heat exchanging
US6871707Apr 24, 2001Mar 29, 2005Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation with carbon dioxide sequestration
US6877554Apr 24, 2001Apr 12, 2005Shell Oil CompanyPyrolysis
US6877555Apr 24, 2002Apr 12, 2005Shell Oil CompanyIn situ thermal processing of an oil shale formation while inhibiting coking
US6880633Apr 24, 2002Apr 19, 2005Shell Oil CompanyIncludes shutting-in an in situ treatment process in an oil shale formation may include terminating heating from heat sources providing heat to a portion of the formation; hydrocarbon vapor may be produced
US6880635Apr 24, 2001Apr 19, 2005Shell Oil CompanyMethods and systems for production of hydrocarbons, hydrogen, and/or other products from underground coal formations
US6889769Apr 24, 2001May 10, 2005Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation with a selected moisture content
US6896053Apr 24, 2001May 24, 2005Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation using repeating triangular patterns of heat sources
US6902003Apr 24, 2001Jun 7, 2005Shell Oil CompanyAllowing heat to transfer from heaters to a formation selected for heating using a total organic matter weight percentage of > 5% and recirculating hydrogen
US6902004Apr 24, 2001Jun 7, 2005Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation using a movable heating element
US6910536Apr 24, 2001Jun 28, 2005Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation using a natural distributed combustor
US6913078Apr 24, 2001Jul 5, 2005Shell Oil CompanyIn Situ thermal processing of hydrocarbons within a relatively impermeable formation
US6915850Apr 24, 2002Jul 12, 2005Shell Oil CompanyIn situ thermal processing of an oil shale formation having permeable and impermeable sections
US6918442Apr 24, 2002Jul 19, 2005Shell Oil CompanyIn situ conversion of hydrocarbons to produce hydrocarbons, hydrogen, and/or novel product streams from underground oil shale formations
US6918443Apr 24, 2002Jul 19, 2005Shell Oil CompanyIn situ thermal processing of an oil shale formation to produce hydrocarbons having a selected carbon number range
US6923257Apr 24, 2002Aug 2, 2005Shell Oil CompanyIn situ thermal processing of an oil shale formation to produce a condensate
US6923258Jun 12, 2003Aug 2, 2005Shell Oil CompanyIn situ thermal processsing of a hydrocarbon containing formation to produce a mixture with a selected hydrogen content
US6929067Apr 24, 2002Aug 16, 2005Shell Oil CompanyHeat sources with conductive material for in situ thermal processing of an oil shale formation
US6932155Oct 24, 2002Aug 23, 2005Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation via backproducing through a heater well
US6948562Apr 24, 2002Sep 27, 2005Shell Oil CompanyProduction of a blending agent using an in situ thermal process in a relatively permeable formation
US6948563Apr 24, 2001Sep 27, 2005Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation with a selected hydrogen content
US6951247Apr 24, 2002Oct 4, 2005Shell Oil CompanyControl the heat exchanging, pyrolyzing hydrocarbons, enhancing oil recovery
US6953087Apr 24, 2001Oct 11, 2005Shell Oil CompanyThermal processing of a hydrocarbon containing formation to increase a permeability of the formation
US6959761Apr 24, 2001Nov 1, 2005Shell Oil CompanyIn situ thermal processing of a coal formation with a selected ratio of heat sources to production wells
US6964300Apr 24, 2002Nov 15, 2005Shell Oil CompanyIn situ thermal recovery from a relatively permeable formation with backproduction through a heater wellbore
US6966372Apr 24, 2001Nov 22, 2005Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation to produce oxygen containing formation fluids
US6966374Apr 24, 2002Nov 22, 2005Shell Oil CompanyIn situ thermal recovery from a relatively permeable formation using gas to increase mobility
US6969123Oct 24, 2002Nov 29, 2005Shell Oil CompanyUpgrading and mining of coal
US6973967Apr 24, 2001Dec 13, 2005Shell Oil Companyhydrocarbons within a coal formation are converted in situ within the formation to yield a mixture of relatively high quality hydrocarbon products, hydrogen, and other products; the coal is heated to to temperatures that allow pyrolysis
US6981548Apr 24, 2002Jan 3, 2006Shell Oil Companyheating and pyrolysis of heavy hydrocarbon sections in subterranean wells to produce light hydrocarbons; reduced viscosity improves movement; fluid removal in liquid and/or vapor phase
US6991031Apr 24, 2001Jan 31, 2006Shell Oil CompanyIn situ thermal processing of a coal formation to convert a selected total organic carbon content into hydrocarbon products
US6991032Apr 24, 2002Jan 31, 2006Shell Oil CompanyHeat sources positioned within the formation in a selected pattern raise a temperature of a portion of the formation to a pyrolysis temperature.
US6991033Apr 24, 2002Jan 31, 2006Shell Oil CompanyIn situ thermal processing while controlling pressure in an oil shale formation
US6991036Apr 24, 2002Jan 31, 2006Shell Oil CompanyThermal processing of a relatively permeable formation
US6991045Oct 24, 2002Jan 31, 2006Shell Oil CompanyForming openings in a hydrocarbon containing formation using magnetic tracking
US6994160Apr 24, 2001Feb 7, 2006Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation to produce hydrocarbons having a selected carbon number range
US6994161Apr 24, 2001Feb 7, 2006Kevin Albert MaherIn situ thermal processing of a coal formation with a selected moisture content
US6994168Apr 24, 2001Feb 7, 2006Scott Lee WellingtonIn situ thermal processing of a hydrocarbon containing formation with a selected hydrogen to carbon ratio
US6994169Apr 24, 2002Feb 7, 2006Shell Oil CompanyIn situ thermal processing of an oil shale formation with a selected property
US6997255Apr 24, 2001Feb 14, 2006Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation in a reducing environment
US6997518Apr 24, 2002Feb 14, 2006Shell Oil CompanyIn situ thermal processing and solution mining of an oil shale formation
US7004247Apr 24, 2002Feb 28, 2006Shell Oil CompanyConductor-in-conduit heat sources for in situ thermal processing of an oil shale formation
US7004251Apr 24, 2002Feb 28, 2006Shell Oil CompanyIn situ thermal processing and remediation of an oil shale formation
US7011154Oct 24, 2002Mar 14, 2006Shell Oil CompanyIn situ recovery from a kerogen and liquid hydrocarbon containing formation
US7013972Apr 24, 2002Mar 21, 2006Shell Oil CompanyIn situ thermal processing of an oil shale formation using a natural distributed combustor
US7017661Apr 24, 2001Mar 28, 2006Shell Oil CompanyProduction of synthesis gas from a coal formation
US7032660 *Apr 24, 2002Apr 25, 2006Shell Oil CompanyIn situ thermal processing and inhibiting migration of fluids into or out of an in situ oil shale formation
US7036583Sep 24, 2001May 2, 2006Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation to increase a porosity of the formation
US7040398Apr 24, 2002May 9, 2006Shell Oil CompanyIn situ thermal processing of a relatively permeable formation in a reducing environment
US7040399Apr 24, 2002May 9, 2006Shell Oil CompanyIn situ thermal processing of an oil shale formation using a controlled heating rate
US7040400Apr 24, 2002May 9, 2006Shell Oil CompanyIn situ thermal processing of a relatively impermeable formation using an open wellbore
US7051807Apr 24, 2002May 30, 2006Shell Oil CompanyIn situ thermal recovery from a relatively permeable formation with quality control
US7051808Oct 24, 2002May 30, 2006Shell Oil CompanySeismic monitoring of in situ conversion in a hydrocarbon containing formation
US7051811Apr 24, 2002May 30, 2006Shell Oil CompanyIn situ thermal processing through an open wellbore in an oil shale formation
US7055600Apr 24, 2002Jun 6, 2006Shell Oil CompanyIn situ thermal recovery from a relatively permeable formation with controlled production rate
US7063145Oct 24, 2002Jun 20, 2006Shell Oil CompanyMethods and systems for heating a hydrocarbon containing formation in situ with an opening contacting the earth's surface at two locations
US7066254Oct 24, 2002Jun 27, 2006Shell Oil CompanyIn situ thermal processing of a tar sands formation
US7066257Oct 24, 2002Jun 27, 2006Shell Oil CompanyIn situ recovery from lean and rich zones in a hydrocarbon containing formation
US7073578Oct 24, 2003Jul 11, 2006Shell Oil CompanyStaged and/or patterned heating during in situ thermal processing of a hydrocarbon containing formation
US7077198Oct 24, 2002Jul 18, 2006Shell Oil CompanyIn situ recovery from a hydrocarbon containing formation using barriers
US7077199Oct 24, 2002Jul 18, 2006Shell Oil CompanyIn situ thermal processing of an oil reservoir formation
US7086465Oct 24, 2002Aug 8, 2006Shell Oil CompanyIn situ production of a blending agent from a hydrocarbon containing formation
US7086468Apr 24, 2001Aug 8, 2006Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation using heat sources positioned within open wellbores
US7090013Oct 24, 2002Aug 15, 2006Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation to produce heated fluids
US7096941Apr 24, 2001Aug 29, 2006Shell Oil CompanyIn situ thermal processing of a coal formation with heat sources located at an edge of a coal layer
US7096942Apr 24, 2002Aug 29, 2006Shell Oil CompanyIn situ thermal processing of a relatively permeable formation while controlling pressure
US7096953Apr 24, 2001Aug 29, 2006Shell Oil CompanyIn situ thermal processing of a coal formation using a movable heating element
US7100994Oct 24, 2002Sep 5, 2006Shell Oil CompanyProducing hydrocarbons and non-hydrocarbon containing materials when treating a hydrocarbon containing formation
US7104319Oct 24, 2002Sep 12, 2006Shell Oil CompanyIn situ thermal processing of a heavy oil diatomite formation
US7114566Oct 24, 2002Oct 3, 2006Shell Oil CompanyHeat treatment using natural distributed combustor; oxidation of hydrocarbons to generate heat; pyrolysis
US7121341Oct 24, 2003Oct 17, 2006Shell Oil CompanyConductor-in-conduit temperature limited heaters
US7121342Apr 23, 2004Oct 17, 2006Shell Oil CompanyThermal processes for subsurface formations
US7128153Oct 24, 2002Oct 31, 2006Shell Oil CompanyTreatment of a hydrocarbon containing formation after heating
US7156176Oct 24, 2002Jan 2, 2007Shell Oil CompanyInstallation and use of removable heaters in a hydrocarbon containing formation
US7165615Oct 24, 2002Jan 23, 2007Shell Oil CompanyIn situ recovery from a hydrocarbon containing formation using conductor-in-conduit heat sources with an electrically conductive material in the overburden
US7219734Oct 24, 2003May 22, 2007Shell Oil CompanyInhibiting wellbore deformation during in situ thermal processing of a hydrocarbon containing formation
US7225866Jan 31, 2006Jun 5, 2007Shell Oil CompanyIn situ thermal processing of an oil shale formation using a pattern of heat sources
US7320364Apr 22, 2005Jan 22, 2008Shell Oil CompanyInhibiting reflux in a heated well of an in situ conversion system
US7353872Apr 22, 2005Apr 8, 2008Shell Oil CompanyStart-up of temperature limited heaters using direct current (DC)
US7357180Apr 22, 2005Apr 15, 2008Shell Oil CompanyInhibiting effects of sloughing in wellbores
US7360588Oct 17, 2006Apr 22, 2008Shell Oil CompanyThermal processes for subsurface formations
US7370704Apr 22, 2005May 13, 2008Shell Oil CompanyTriaxial temperature limited heater
US7383877Apr 22, 2005Jun 10, 2008Shell Oil CompanyTemperature limited heaters with thermally conductive fluid used to heat subsurface formations
US7424915Apr 22, 2005Sep 16, 2008Shell Oil CompanyVacuum pumping of conductor-in-conduit heaters
US7431076Apr 22, 2005Oct 7, 2008Shell Oil CompanyTemperature limited heaters using modulated DC power
US7435037Apr 21, 2006Oct 14, 2008Shell Oil CompanyLow temperature barriers with heat interceptor wells for in situ processes
US7461691Jan 23, 2007Dec 9, 2008Shell Oil CompanyIn situ recovery from a hydrocarbon containing formation
US7481274Apr 22, 2005Jan 27, 2009Shell Oil CompanyTemperature limited heaters with relatively constant current
US7490665Apr 22, 2005Feb 17, 2009Shell Oil CompanyVariable frequency temperature limited heaters
US7500528Apr 21, 2006Mar 10, 2009Shell Oil CompanyLow temperature barrier wellbores formed using water flushing
US7510000Apr 22, 2005Mar 31, 2009Shell Oil CompanyReducing viscosity of oil for production from a hydrocarbon containing formation
US7527094Apr 21, 2006May 5, 2009Shell Oil CompanyDouble barrier system for an in situ conversion process
US7533719Apr 20, 2007May 19, 2009Shell Oil CompanyWellhead with non-ferromagnetic materials
US7540324Oct 19, 2007Jun 2, 2009Shell Oil CompanyHeating hydrocarbon containing formations in a checkerboard pattern staged process
US7546873Apr 21, 2006Jun 16, 2009Shell Oil CompanyLow temperature barriers for use with in situ processes
US7549470Oct 20, 2006Jun 23, 2009Shell Oil CompanySolution mining and heating by oxidation for treating hydrocarbon containing formations
US7556095Oct 20, 2006Jul 7, 2009Shell Oil CompanySolution mining dawsonite from hydrocarbon containing formations with a chelating agent
US7556096Oct 20, 2006Jul 7, 2009Shell Oil CompanyVarying heating in dawsonite zones in hydrocarbon containing formations
US7559367Oct 20, 2006Jul 14, 2009Shell Oil CompanyTemperature limited heater with a conduit substantially electrically isolated from the formation
US7559368Oct 20, 2006Jul 14, 2009Shell Oil CompanySolution mining systems and methods for treating hydrocarbon containing formations
US7562706Oct 20, 2006Jul 21, 2009Shell Oil CompanySystems and methods for producing hydrocarbons from tar sands formations
US7562707Oct 19, 2007Jul 21, 2009Shell Oil CompanyHeating hydrocarbon containing formations in a line drive staged process
US7575052Apr 21, 2006Aug 18, 2009Shell Oil CompanyIn situ conversion process utilizing a closed loop heating system
US7575053Apr 21, 2006Aug 18, 2009Shell Oil CompanyLow temperature monitoring system for subsurface barriers
US7581589Oct 20, 2006Sep 1, 2009Shell Oil CompanyMethods of producing alkylated hydrocarbons from an in situ heat treatment process liquid
US7584789Oct 20, 2006Sep 8, 2009Shell Oil CompanyMethods of cracking a crude product to produce additional crude products
US7591310Oct 20, 2006Sep 22, 2009Shell Oil CompanyMethods of hydrotreating a liquid stream to remove clogging compounds
US7597147Apr 20, 2007Oct 6, 2009Shell Oil CompanyTemperature limited heaters using phase transformation of ferromagnetic material
US7604052Apr 20, 2007Oct 20, 2009Shell Oil CompanyCompositions produced using an in situ heat treatment process
US7610962Apr 20, 2007Nov 3, 2009Shell Oil CompanyProviding acidic gas to a subterrean formation, such as oil shale, by heating from an electrical heater and injecting through an oil wellbore; one of the acidic acids includes hydrogen sulfide and is introduced at a pressure below the lithostatic pressure of the formation to produce fluids; efficiency
US7631689Apr 20, 2007Dec 15, 2009Shell Oil CompanySulfur barrier for use with in situ processes for treating formations
US7631690Oct 19, 2007Dec 15, 2009Shell Oil CompanyHeating hydrocarbon containing formations in a spiral startup staged sequence
US7635023Apr 20, 2007Dec 22, 2009Shell Oil CompanyTime sequenced heating of multiple layers in a hydrocarbon containing formation
US7635024Oct 19, 2007Dec 22, 2009Shell Oil CompanyHeating tar sands formations to visbreaking temperatures
US7635025Oct 20, 2006Dec 22, 2009Shell Oil CompanyCogeneration systems and processes for treating hydrocarbon containing formations
US7640980Apr 7, 2008Jan 5, 2010Shell Oil CompanyThermal processes for subsurface formations
US7644765Oct 19, 2007Jan 12, 2010Shell Oil CompanyHeating tar sands formations while controlling pressure
US7673681Oct 19, 2007Mar 9, 2010Shell Oil CompanyTreating tar sands formations with karsted zones
US7673786Apr 20, 2007Mar 9, 2010Shell Oil CompanyWelding shield for coupling heaters
US7677310Oct 19, 2007Mar 16, 2010Shell Oil CompanyCreating and maintaining a gas cap in tar sands formations
US7677314Oct 19, 2007Mar 16, 2010Shell Oil CompanyMethod of condensing vaporized water in situ to treat tar sands formations
US7681647Oct 19, 2007Mar 23, 2010Shell Oil CompanyMethod of producing drive fluid in situ in tar sands formations
US7683296Apr 20, 2007Mar 23, 2010Shell Oil CompanyAdjusting alloy compositions for selected properties in temperature limited heaters
US7703513Oct 19, 2007Apr 27, 2010Shell Oil CompanyWax barrier for use with in situ processes for treating formations
US7717171Oct 19, 2007May 18, 2010Shell Oil CompanyMoving hydrocarbons through portions of tar sands formations with a fluid
US7730945Oct 19, 2007Jun 8, 2010Shell Oil CompanyUsing geothermal energy to heat a portion of a formation for an in situ heat treatment process
US7730946Oct 19, 2007Jun 8, 2010Shell Oil CompanyTreating tar sands formations with dolomite
US7730947Oct 19, 2007Jun 8, 2010Shell Oil CompanyCreating fluid injectivity in tar sands formations
US7735935Jun 1, 2007Jun 15, 2010Shell Oil CompanyIn situ thermal processing of an oil shale formation containing carbonate minerals
US7785427Apr 20, 2007Aug 31, 2010Shell Oil CompanyChromium, nickel, copper; niobium, iron manganese, nitrogen; nanonitrides; system for heating a subterranean formation;
US7793722Apr 20, 2007Sep 14, 2010Shell Oil CompanyNon-ferromagnetic overburden casing
US7798220Apr 18, 2008Sep 21, 2010Shell Oil CompanyIn situ heat treatment of a tar sands formation after drive process treatment
US7798221May 31, 2007Sep 21, 2010Shell Oil CompanyIn situ recovery from a hydrocarbon containing formation
US7831133Apr 21, 2006Nov 9, 2010Shell Oil CompanyInsulated conductor temperature limited heater for subsurface heating coupled in a three-phase WYE configuration
US7831134Apr 21, 2006Nov 9, 2010Shell Oil CompanyGrouped exposed metal heaters
US7832484Apr 18, 2008Nov 16, 2010Shell Oil CompanyMolten salt as a heat transfer fluid for heating a subsurface formation
US7841401Oct 19, 2007Nov 30, 2010Shell Oil CompanyGas injection to inhibit migration during an in situ heat treatment process
US7841408Apr 18, 2008Nov 30, 2010Shell Oil CompanyIn situ heat treatment from multiple layers of a tar sands formation
US7841425Apr 18, 2008Nov 30, 2010Shell Oil CompanyDrilling subsurface wellbores with cutting structures
US7845411Oct 19, 2007Dec 7, 2010Shell Oil CompanyIn situ heat treatment process utilizing a closed loop heating system
US7849922Apr 18, 2008Dec 14, 2010Shell Oil CompanyIn situ recovery from residually heated sections in a hydrocarbon containing formation
US7860377Apr 21, 2006Dec 28, 2010Shell Oil CompanySubsurface connection methods for subsurface heaters
US7866385Apr 20, 2007Jan 11, 2011Shell Oil CompanyPower systems utilizing the heat of produced formation fluid
US7866386Oct 13, 2008Jan 11, 2011Shell Oil Companyproduction of hydrocarbons, hydrogen, and/or other products from various subsurface formations such as hydrocarbon containing formations through use of oxidizing fluids and heat
US7866388Oct 13, 2008Jan 11, 2011Shell Oil CompanyHigh temperature methods for forming oxidizer fuel
US7912358Apr 20, 2007Mar 22, 2011Shell Oil CompanyAlternate energy source usage for in situ heat treatment processes
US7931086Apr 18, 2008Apr 26, 2011Shell Oil CompanyHeating systems for heating subsurface formations
US7942197Apr 21, 2006May 17, 2011Shell Oil CompanyMethods and systems for producing fluid from an in situ conversion process
US7942203Jan 4, 2010May 17, 2011Shell Oil CompanyThermal processes for subsurface formations
US7950453Apr 18, 2008May 31, 2011Shell Oil CompanyDownhole burner systems and methods for heating subsurface formations
US7986869Apr 21, 2006Jul 26, 2011Shell Oil CompanyVarying properties along lengths of temperature limited heaters
US8011451Oct 13, 2008Sep 6, 2011Shell Oil CompanyRanging methods for developing wellbores in subsurface formations
US8027571Apr 21, 2006Sep 27, 2011Shell Oil CompanyIn situ conversion process systems utilizing wellbores in at least two regions of a formation
US8042610Apr 18, 2008Oct 25, 2011Shell Oil CompanyParallel heater system for subsurface formations
US8070840Apr 21, 2006Dec 6, 2011Shell Oil CompanyTreatment of gas from an in situ conversion process
US8083813Apr 20, 2007Dec 27, 2011Shell Oil CompanyMethods of producing transportation fuel
US8113272Oct 13, 2008Feb 14, 2012Shell Oil CompanyThree-phase heaters with common overburden sections for heating subsurface formations
US8146661Oct 13, 2008Apr 3, 2012Shell Oil CompanyCryogenic treatment of gas
US8146669Oct 13, 2008Apr 3, 2012Shell Oil CompanyMulti-step heater deployment in a subsurface formation
US8151880Dec 9, 2010Apr 10, 2012Shell Oil CompanyMethods of making transportation fuel
US8151907Apr 10, 2009Apr 10, 2012Shell Oil CompanyDual motor systems and non-rotating sensors for use in developing wellbores in subsurface formations
US8162059Oct 13, 2008Apr 24, 2012Shell Oil CompanyInduction heaters used to heat subsurface formations
US8162405Apr 10, 2009Apr 24, 2012Shell Oil CompanyUsing tunnels for treating subsurface hydrocarbon containing formations
US8172335Apr 10, 2009May 8, 2012Shell Oil CompanyElectrical current flow between tunnels for use in heating subsurface hydrocarbon containing formations
US8177305Apr 10, 2009May 15, 2012Shell Oil CompanyHeater connections in mines and tunnels for use in treating subsurface hydrocarbon containing formations
US8191630Apr 28, 2010Jun 5, 2012Shell Oil CompanyCreating fluid injectivity in tar sands formations
US8192682Apr 26, 2010Jun 5, 2012Shell Oil CompanyHigh strength alloys
US8196658Oct 13, 2008Jun 12, 2012Shell Oil CompanyIrregular spacing of heat sources for treating hydrocarbon containing formations
US8220539Oct 9, 2009Jul 17, 2012Shell Oil CompanyControlling hydrogen pressure in self-regulating nuclear reactors used to treat a subsurface formation
US8224163Oct 24, 2003Jul 17, 2012Shell Oil CompanyVariable frequency temperature limited heaters
US8224164Oct 24, 2003Jul 17, 2012Shell Oil CompanyInsulated conductor temperature limited heaters
US8224165Apr 21, 2006Jul 17, 2012Shell Oil CompanyTemperature limited heater utilizing non-ferromagnetic conductor
US8225866Jul 21, 2010Jul 24, 2012Shell Oil CompanyIn situ recovery from a hydrocarbon containing formation
US8230927May 16, 2011Jul 31, 2012Shell Oil CompanyMethods and systems for producing fluid from an in situ conversion process
US8233782Sep 29, 2010Jul 31, 2012Shell Oil CompanyGrouped exposed metal heaters
US8238730Oct 24, 2003Aug 7, 2012Shell Oil CompanyHigh voltage temperature limited heaters
US8240774Oct 13, 2008Aug 14, 2012Shell Oil CompanySolution mining and in situ treatment of nahcolite beds
US8256512Oct 9, 2009Sep 4, 2012Shell Oil CompanyMovable heaters for treating subsurface hydrocarbon containing formations
US8261832Oct 9, 2009Sep 11, 2012Shell Oil CompanyHeating subsurface formations with fluids
US8267170Oct 9, 2009Sep 18, 2012Shell Oil CompanyOffset barrier wells in subsurface formations
US8267185Oct 9, 2009Sep 18, 2012Shell Oil CompanyCirculated heated transfer fluid systems used to treat a subsurface formation
US8272455Oct 13, 2008Sep 25, 2012Shell Oil CompanyMethods for forming wellbores in heated formations
US8276661Oct 13, 2008Oct 2, 2012Shell Oil CompanyHeating subsurface formations by oxidizing fuel on a fuel carrier
US8281861Oct 9, 2009Oct 9, 2012Shell Oil CompanyCirculated heated transfer fluid heating of subsurface hydrocarbon formations
US8327681Apr 18, 2008Dec 11, 2012Shell Oil CompanyWellbore manufacturing processes for in situ heat treatment processes
US8327932Apr 9, 2010Dec 11, 2012Shell Oil CompanyRecovering energy from a subsurface formation
US8353347Oct 9, 2009Jan 15, 2013Shell Oil CompanyDeployment of insulated conductors for treating subsurface formations
US8355623Apr 22, 2005Jan 15, 2013Shell Oil CompanyTemperature limited heaters with high power factors
US8381815Apr 18, 2008Feb 26, 2013Shell Oil CompanyProduction from multiple zones of a tar sands formation
US8434555Apr 9, 2010May 7, 2013Shell Oil CompanyIrregular pattern treatment of a subsurface formation
US8448707Apr 9, 2010May 28, 2013Shell Oil CompanyNon-conducting heater casings
US8459359Apr 18, 2008Jun 11, 2013Shell Oil CompanyTreating nahcolite containing formations and saline zones
US8485252Jul 11, 2012Jul 16, 2013Shell Oil CompanyIn situ recovery from a hydrocarbon containing formation
US8536497Oct 13, 2008Sep 17, 2013Shell Oil CompanyMethods for forming long subsurface heaters
US8555971May 31, 2012Oct 15, 2013Shell Oil CompanyTreating tar sands formations with dolomite
US8562078Nov 25, 2009Oct 22, 2013Shell Oil CompanyHydrocarbon production from mines and tunnels used in treating subsurface hydrocarbon containing formations
US8579031May 17, 2011Nov 12, 2013Shell Oil CompanyThermal processes for subsurface formations
US8606091Oct 20, 2006Dec 10, 2013Shell Oil CompanySubsurface heaters with low sulfidation rates
US8627887Dec 8, 2008Jan 14, 2014Shell Oil CompanyIn situ recovery from a hydrocarbon containing formation
US8631866Apr 8, 2011Jan 21, 2014Shell Oil CompanyLeak detection in circulated fluid systems for heating subsurface formations
US8636323Nov 25, 2009Jan 28, 2014Shell Oil CompanyMines and tunnels for use in treating subsurface hydrocarbon containing formations
US8662175Apr 18, 2008Mar 4, 2014Shell Oil CompanyVarying properties of in situ heat treatment of a tar sands formation based on assessed viscosities
US8701768Apr 8, 2011Apr 22, 2014Shell Oil CompanyMethods for treating hydrocarbon formations
US8701769Apr 8, 2011Apr 22, 2014Shell Oil CompanyMethods for treating hydrocarbon formations based on geology
US8739874Apr 8, 2011Jun 3, 2014Shell Oil CompanyMethods for heating with slots in hydrocarbon formations
US8752904Apr 10, 2009Jun 17, 2014Shell Oil CompanyHeated fluid flow in mines and tunnels used in heating subsurface hydrocarbon containing formations
USRE35696 *Sep 28, 1995Dec 23, 1997Shell Oil CompanyHeat injection process
Classifications
U.S. Classification166/60, 392/301
International ClassificationE21B36/00, E21B36/04
Cooperative ClassificationE21B36/04
European ClassificationE21B36/04