|Publication number||US2812160 A|
|Publication date||Nov 5, 1957|
|Filing date||Jun 30, 1953|
|Priority date||Jun 30, 1953|
|Publication number||US 2812160 A, US 2812160A, US-A-2812160, US2812160 A, US2812160A|
|Inventors||Binder Jr George G, Freeman Jr William A, West Robert C|
|Original Assignee||Exxon Research Engineering Co|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (4), Referenced by (51), Classifications (11)|
|External Links: USPTO, USPTO Assignment, Espacenet|
2 Sheets-Sheet 1 R. c. wEs'r Erm.V v
RECOVERY oF UNCONTAMINATED coREs Nov. s, 1957 Fuga June so, 1953 ma()` ATTORNEYk R. C'. WEST ETAL RECOVERY 0F UNCONTAMINATED CORES Nov. 5, 1957 2 Sheets-Sheet 2 Filed June 30, 1953.
BORE I-IOLE ORE BARREL INNER BARREL OUTER BARREL OUTT INGS MOVING UF FROZEN CORE LIQUID EXPANSION VALVE AUGER TO 4CARRY OUTTINGB TO .CUTTING BASKET |NvENToRs BINDERJR AN .JR
ATTO RN E Y United `States Patent O 2,812,160 Y RECOVERY F UNCONTAMINATED CORES Robert C. West, George G. Binder, Jr., and William A. Freeman, Jr., Tulsa, Okla., assignors to Esso Research and Engineering Company, a corporation of Delaware Application June 30, 1953, Serial No. 365,206
2 Claims. (Cl. Z55-1.4)
The present invention is concerned broadly with the production of oil. The invention is more specically concerned with the recovery of uncontaminated cores during a coring operation. In oil well drilling practice, a sample of subsurface rock penetrated in the course of drilling operations isreferred-to as a core. The operation by which such a sample is obtained in order to ascertain the properties of a given formation is known in the art as coring. The devices employed to collect these cores are known as core barrels and are usually so constructed as to be attached to the lower end of a drill pipe. In accordance with the present invention, an uncontaminated core is secured by freezing the core as it is being recovered from the earths substrata.
The cores obtained by all types of core barrels known at present are essentially similar in the respect that these cores are exposed to a constantly diminishing pressure from the moment the core begins its upward movement until it arrives at the surface. Mineral oil and gas found in subsurface foundations are generally under a high pressure which is commonly referred to as the formation pressure. The extent of this pressure depends upon the depth of the formation and in general is proportional to the hydrostatic pressure exerted on the formation in which oil or gas is found. It is a well known fact that when oil or gas-bearing formations are exposed to a pressure lower than the formation pressure, the oil or gas contained in them has a tendency to expand and leave the formation. Consequently, the reduction in pressure on a core obtained by present methods of coring during its travel to the surface brings about a considerable change in theoil and gas content of the core, thereby rendering the core unreliable.
Thus, one diiculty has been to secure a core accurately representing the exact nature of the earths substrata'from which it was removed. This is particularly critical in view of a growing interest in water flooding and other secondary recovery methods, since it is essential that a direct and accurate measurement of residual oil and water saturations be determined prior to employing a selected secondary recovery operation.
At the present time estimates of residual oil saturation in the reservoir can be obtained from past production records, data on crude oil, interstitial water content, porosity, pay sand, and the like. However, lack of knowledge of some of the above factors, together with such features and oil migration and water influx, make estimat ing residual oil saturation in the depleted reservoir prior to secondary recovery operations uncertain. In accordance with the present invention, a core is frozen or cooled in situ as it is being cored, thus preventing or substantially reducing the migration of oil and water from the core, or the adsorption of oil and other contaminants from sources foreign to the core.
The process of the present invention may be more fully understood by reference to the drawings illustrating one apparatus which is satisfactory for freezing or chilling the core in situ as it is being recovered.
Fig. 1 is a sectional view in elevation showing a portionl of the drill string of the apparatus.
Fig. 1a is a vertical sectional view of a portion of the outer barrel and core barrel members of the apparatus.
Fig. lb is a vertical sectional view of another portion of the core barrel and outer barrel members of the apparatus and also the coring bit.
Referring specifically to the drawings, a drill stem or string 1 is shown disposed within the borehole 2 penetrating from the earths surface to substrata. A refrigerant pipe 3 lis shown concentrically disposed within the string I1. A packing element 4 closes off the area below the packing from the area above the packing without the refrigerant pipe 3, and within the drill stem. In operation one method is to use a selected refrigerant such as sulfur dioxide, ammonia, freon, and the like, which is pumped down within the drill stem from the earths surface. This refrigerant ows down passageway 23 in refrigerant pipe 3 into a coil 8, positioned in area 5 which is a hollow annular space disposed within the wall portion of the outer barrel 7 of the coring element. The refrigerant flows through this wound coil element 8 in area S and is discharged from the core element through liquid expansion valve 9 into area 5. The refrigerant is vaporized and flows upwardly in area 5, thus chilling the inner barrel 6. The refrigerant flows upwardly through gas return port 10 and passes via annular passageway 21 between refrigerant pipe 3 and the drill string 1 and thence through ports 11 into the area between the drill string and the borehole. A swivel element 12 permits the inner barrel 6 to remain stationary while the outer barrel 7 rotates in the coring operation. Coring bit 13 is positioned at the lower end of the bit element. An auger element 14 is positioned around the outer barrel which causes the cut- Y tings to llow upwardly in the borehole and to be discharged into cutting basket 15.
The process of the present invention is concerned with an operation wherein the core is frozen in situ as it is being recovered. This prevents contamination of the core and also prevents loss of valuable fluids from the core as it is being raised to the earths surface.
What is claimed is:
1. An improved coring apparatus for obtaining an uncontaminated core sample from the earth substrata which comprises in combination a string of drill pipe, an outer barrel member attached to the lower end of the drill string and provided with a coring bit, an inner core receiving barrel concentrically disposed within said outer barrel, means permiting rotation of said outer barrel relative to said inner barrel, a cooling chamber disposed within said outer barrel, a spiral coil conduit Within said cooling chamber and surrounding said inner barrel, irst conduit means arranged to transmit a vaporizable liquid refrigerant from the drill string to one end of said coil, expansion valve means at the opposite end of said coil arranged to vaporize said refrigerant and to discharge the vapors into said cooling chamber, second conduit means for conveying said vapors from said cooling chamber to the annular space between the drill string and the surrounding earth strata, an auger attached to the outer periphery of the outer barrel and arranged to transport drill cuttings upward from the coring bit.
2. An apparatus as defined in claim 1 including a cutting basket arranged to receive said cuttings.
References Cited in the tile of this patent UNITED STATES PATENTSv
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US1870696 *||Jul 16, 1929||Aug 9, 1932||Thomas G Taylor||Self cooling, drilling, and coring bit|
|US2040889 *||May 23, 1933||May 19, 1936||Sullivan Machinery Co||Core drill|
|US2617296 *||Dec 20, 1946||Nov 11, 1952||Core Lab Inc||Process for treating core samples|
|DE329896C *||May 24, 1914||Dec 1, 1920||Charbonnages De Beeringen Sa D||Verfahren und Vorrichtung zum Abteufen von Schaechten, insbesondere durch wasserfuehrende Schichten|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US2905444 *||Jul 26, 1957||Sep 22, 1959||Evalyn Shepard||Core barrel|
|US2915285 *||May 23, 1956||Dec 1, 1959||Jersey Prod Res Co||Coring subterranean formations|
|US3447615 *||Mar 11, 1966||Jun 3, 1969||Schick Clifford L||Core sample retrieving apparatus|
|US3612192 *||Apr 14, 1969||Oct 12, 1971||Maguire James C Jr||Cryogenic drilling method|
|US3650337 *||Jul 31, 1969||Mar 21, 1972||Aerojet General Co||Cryogenically cooled drill|
|US4371045 *||Apr 1, 1981||Feb 1, 1983||The United States Of America As Represented By The United States Department Of Energy||Method and apparatus for recovering unstable cores|
|US4809790 *||Sep 4, 1987||Mar 7, 1989||Manchak Frank||Device for sampling soils and retaining volatiles therein and method of using same|
|US6216804 *||Jul 29, 1998||Apr 17, 2001||James T. Aumann||Apparatus for recovering core samples under pressure|
|US6230825||Jun 30, 2000||May 15, 2001||James T. Aumann||Apparatus for recovering core samples under pressure|
|US6305482||Jun 30, 2000||Oct 23, 2001||James T. Aumann||Method and apparatus for transferring core sample from core retrieval chamber under pressure for transport|
|US6378631||Jun 30, 2000||Apr 30, 2002||James T. Aumann||Apparatus for recovering core samples at in situ conditions|
|US6659204||Feb 8, 2001||Dec 9, 2003||Japan National Oil Corporation||Method and apparatus for recovering core samples under pressure|
|US7000711||Feb 9, 2004||Feb 21, 2006||Ch2M Hill, Inc.||Horizontal bore cryogenic drilling method|
|US7516785||Oct 10, 2007||Apr 14, 2009||Exxonmobil Upstream Research Company||Method of developing subsurface freeze zone|
|US7516787||Oct 10, 2007||Apr 14, 2009||Exxonmobil Upstream Research Company||Method of developing a subsurface freeze zone using formation fractures|
|US7631691||Dec 15, 2009||Exxonmobil Upstream Research Company||Methods of treating a subterranean formation to convert organic matter into producible hydrocarbons|
|US7647971||Dec 23, 2008||Jan 19, 2010||Exxonmobil Upstream Research Company||Method of developing subsurface freeze zone|
|US7647972||Dec 23, 2008||Jan 19, 2010||Exxonmobil Upstream Research Company||Subsurface freeze zone using formation fractures|
|US7669657||Mar 2, 2010||Exxonmobil Upstream Research Company||Enhanced shale oil production by in situ heating using hydraulically fractured producing wells|
|US8074739 *||Dec 13, 2011||Jilin University||Sampling method and sampler for gas hydrates by hole bottom freezing|
|US8082995||Dec 27, 2011||Exxonmobil Upstream Research Company||Optimization of untreated oil shale geometry to control subsidence|
|US8087460||Jan 3, 2012||Exxonmobil Upstream Research Company||Granular electrical connections for in situ formation heating|
|US8104537||Jan 31, 2012||Exxonmobil Upstream Research Company||Method of developing subsurface freeze zone|
|US8122955||Apr 18, 2008||Feb 28, 2012||Exxonmobil Upstream Research Company||Downhole burners for in situ conversion of organic-rich rock formations|
|US8146664||May 21, 2008||Apr 3, 2012||Exxonmobil Upstream Research Company||Utilization of low BTU gas generated during in situ heating of organic-rich rock|
|US8151877||Apr 18, 2008||Apr 10, 2012||Exxonmobil Upstream Research Company||Downhole burner wells for in situ conversion of organic-rich rock formations|
|US8151884||Oct 10, 2007||Apr 10, 2012||Exxonmobil Upstream Research Company||Combined development of oil shale by in situ heating with a deeper hydrocarbon resource|
|US8230929||Jul 31, 2012||Exxonmobil Upstream Research Company||Methods of producing hydrocarbons for substantially constant composition gas generation|
|US8540020||Apr 21, 2010||Sep 24, 2013||Exxonmobil Upstream Research Company||Converting organic matter from a subterranean formation into producible hydrocarbons by controlling production operations based on availability of one or more production resources|
|US8596355||Dec 10, 2010||Dec 3, 2013||Exxonmobil Upstream Research Company||Optimized well spacing for in situ shale oil development|
|US8616279||Jan 7, 2010||Dec 31, 2013||Exxonmobil Upstream Research Company||Water treatment following shale oil production by in situ heating|
|US8616280||Jun 17, 2011||Dec 31, 2013||Exxonmobil Upstream Research Company||Wellbore mechanical integrity for in situ pyrolysis|
|US8622127||Jun 17, 2011||Jan 7, 2014||Exxonmobil Upstream Research Company||Olefin reduction for in situ pyrolysis oil generation|
|US8622133||Mar 7, 2008||Jan 7, 2014||Exxonmobil Upstream Research Company||Resistive heater for in situ formation heating|
|US8641150||Dec 11, 2009||Feb 4, 2014||Exxonmobil Upstream Research Company||In situ co-development of oil shale with mineral recovery|
|US8770284||Apr 19, 2013||Jul 8, 2014||Exxonmobil Upstream Research Company||Systems and methods of detecting an intersection between a wellbore and a subterranean structure that includes a marker material|
|US8863839||Nov 15, 2010||Oct 21, 2014||Exxonmobil Upstream Research Company||Enhanced convection for in situ pyrolysis of organic-rich rock formations|
|US8875789||Aug 8, 2011||Nov 4, 2014||Exxonmobil Upstream Research Company||Process for producing hydrocarbon fluids combining in situ heating, a power plant and a gas plant|
|US9080441||Oct 26, 2012||Jul 14, 2015||Exxonmobil Upstream Research Company||Multiple electrical connections to optimize heating for in situ pyrolysis|
|US9347302||Nov 12, 2013||May 24, 2016||Exxonmobil Upstream Research Company||Resistive heater for in situ formation heating|
|US20050173156 *||Feb 9, 2004||Aug 11, 2005||Ch2M Hill, Inc.||Horizontal bore cryogenic drilling method|
|US20080087426 *||Oct 10, 2007||Apr 17, 2008||Kaminsky Robert D||Method of developing a subsurface freeze zone using formation fractures|
|US20080185184 *||Feb 6, 2008||Aug 7, 2008||Maguire James Q||Cryogenic drilling method|
|US20080230219 *||Mar 7, 2008||Sep 25, 2008||Kaminsky Robert D||Resistive heater for in situ formation heating|
|US20080277167 *||May 9, 2007||Nov 13, 2008||Marcel Viel||Dry drilling and core acquisition system|
|US20090101348 *||Dec 23, 2008||Apr 23, 2009||Kaminsky Robert D||Method of Developing Subsurface Freeze Zone|
|US20090107679 *||Dec 23, 2008||Apr 30, 2009||Kaminsky Robert D||Subsurface Freeze Zone Using Formation Fractures|
|US20090229382 *||Mar 12, 2009||Sep 17, 2009||Jilin University||Sampling method and sampler for gas hydrates by hole bottom freezing|
|US20100078169 *||Apr 1, 2010||Symington William A||Methods of Treating Suberranean Formation To Convert Organic Matter Into Producible Hydrocarbons|
|DE10131973A1 *||Jul 2, 2001||Jan 30, 2003||Keller Grundbau Gmbh||Sample obtaining method for a ground treated with hardenable bonding agents or mortar involves insertion of a double-walled pipe into the ground before hardening takes place|
|DE10131973C2 *||Jul 2, 2001||Dec 4, 2003||Keller Grundbau Gmbh||Verfahren zur Entnahme von Probekernen|
|U.S. Classification||175/17, 175/244, 175/394, 175/310|
|International Classification||E21B36/00, E21B25/08, E21B25/00|
|Cooperative Classification||E21B25/08, E21B36/001|
|European Classification||E21B25/08, E21B36/00B|