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Publication numberUS3741300 A
Publication typeGrant
Publication dateJun 26, 1973
Filing dateNov 10, 1971
Priority dateNov 10, 1971
Also published asCA943060A, CA943060A1
Publication numberUS 3741300 A, US 3741300A, US-A-3741300, US3741300 A, US3741300A
InventorsJeansonne M, Wolff C
Original AssigneeAmoco Prod Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Selective completion using triple wrap screen
US 3741300 A
Abstract  available in
Images(1)
Previous page
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Claims  available in
Description  (OCR text may contain errors)

United States Patent [191 Wolff et al.

[ 1June 26, 1973 SELECTIVE COMPLETION USING TRIPLE WRAP SCREEN Inventors: Charles S. Wolff; Michael J.

Jeansonne, Lake Charles, La.

Assignee: Amoco Production Company, Tulsa,

Okla.

Filed: Nov. 10, 1971 Appl. No.: 197,241

US. Cl. 166/184, 166/234 Int. Cl E2lb 33/124 Field of Search 166/184, 313, 224,

v References Cited Y UNITED STATES PATENTS 6/1954 Tapprneyer 166/313 5/1966 Donaldson et a1 166/228 2/1957 Maly et al 166/313 9/1960 Garrett 166/313 2/196l Daffin et al 166/224 Primary Etrqgni rtgr- James A. Leppink A ttorney- Paul F. Hawley and John D. Gassett [57] ABSTRACT This invention relates to a completion system for a well drilled in the earth and especially for a well drilled to an oil and gas producing formation. It relates to a system for selectively producing fluid from either an upper or lower zone and for providing sand control facilities for each zone. A tubing string is suspended in a well bore and has an upper sand screen and a lower sand screen which are adjacent the upper and lower producing zones respectively. A packer is set in the annulus about the tubing between the two sand screens. An upper sleeve valve is mounted in the tubing string and is surrounded by the upper sand screen. Plug valve means are provided in the tubing string between the two sand screens. By selectively opening or closing the sleeve valve and the plug valve, production can be selectively opened from either the top or lower zones or both.

3 Claims, 2 Drawing Figures SELECTIVE COMPLETION USING TRIPLE WRAP SCREEN RELATED PATENT APPLICATIONS This application is related to co-pending patent application Ser. No. 77,492 filed Oct. 2, 1970, entitled Multilayer Well Screen for William G. Bearden and George C. Howard.

BACKGROUND OF THE INVENTION This invention relates to a well completion system for selectively producing fluids from either an upper or lower zone and in which these zones produce fluids containing sand. It relates especially to a system for producing fluid selectively from either zone through special sand filters.

SETTING OF THE INVENTION Oil and gas are produced from underground formations through well bores drilled from the surface to the formation. Sometimes oil and gas are found in the pores of consolidated rocks or sand. When this oil is produced through the well bore, it is relatively free of any particles or sand. However, many oil and gas wells produce fluid from underground formations which are not consolidated; that is, the various sand particleswhich make up the rock are not strongly attached to each other. In such formations when the fluid is produced, it carries entrained sand with it. This sand causes serious damage to well equipment and greatly restricts production of such fluids. In producing oil and gas from such underground formations, some method must be provided to restrain the sand inflow into the well. Perhaps the most widely used method of preventing the inflow of sand is the use of a gravel pack placed in the annular space in the well bore between a slotted liner and the formation. The voids between the gravel grains is small enough to prevent inflow of sand particles but still permits flow of fluid.

In conventional gravel packing technique, a perforated liner is connected to the lower end of a string of tubing which is suspended in the well bore. Gravel is circulated (or carried) into the annular space about the liner with the aid of a circulating fluid. This is usually a time consuming and very expensive operation. After the liner is placed in the well, washed and closely sized gravel is circulated into the well at the surface a little at a time, to a stream of circulating fluid forced down the well under pump pressure. Normally the fluid and entrained gravel are forced downwardly through the string of tubing. The gravel is discharged into the well cavity around the liner and the circulating fluid returns to the surface through the annular space. Reverse circulation can be used in which the descending stream of fluid and entrained gravel passes down through the annular space between the tubing string and the casing, the gravel being deposited in the well cavity and the fluid being returned to the surface through the string of tubing.

Frequently two vertically separated zones containing oil and gas are not permitted by government regulations to be produced simultaneously where the fluid can co-mingle in the wellbore. Occasionally it is desired to complete a well selectively such that when the lower producing zone has been depleted, the upper (selective) zone can be recompleted to without a rig workover. This means that upon original conventional gravel packing completion, the wellbore must be set up such that two intervals are perforated (one set. of perforations at each productive zone) with a gravel pack and SxL (sand control means) opposite each set of perforations. This will ordinarily require about four round trips to set up the completion in the above manner. A round trip is the running (lowering) and pulling of an entire assembly (such as a string of tubing) with a rig on location. Rig time can cost $50 to $60 per hour for wells located on land. Furthermore, special and costly equipment in the form of packers and wash pipes are necessary in the conventional gravel packing method. This gravel packing procedure is successful in most cases but is time consuming and expensive. The present invention discloses a system for selectively producing from either an upper or lower zone whereby all the equipment necessary for controlling sand production and for switching from one zone to the other is set when the string of tubing is first run in the well bore. All that is required thereafter is wireline work in which the selective sleeves are changed in position in order to allow switching from one zone to another. This is accomplished without a rig and is therefore relatively inexpensive.

BRIEF DESCRIPTION OF THE INVENTION This invention concerns a well completion system in which a casing is set through an upper unconsolidated formation and a lower unconsolidated formation. The casing has upper perforations and lower perforations at the elevation of the two zones. A string of tubing is suspended in the well bore. The tubing string contains a sleeve valve which is set adjacent the upper perforations of the casing. A first sand screen surrounds this sleeve valve. The lower end of the tubing string is connected to a second or lower sand screen. A plug valve is set in the tubing string between the two sand screens. The sleeve valve and this plug valve means are operable from the surface. A packer is set about the tubing between the two sand screens. Thus, by selectively opening or closing the sleeve valve and the plug valve, production can be had from either the upper or lower zone.

BRIEF DESCRIPTION OF THE DRAWINGS Various objectives and a better understanding can be had of the invention by the following description, taken in conjunction with the drawings in which:

FIG. 1 is a schematic drawing of a well completion according to this invention.

FIG. 2 illustrates in greater detail the upper sand screen and associated sleeve valves.

BETAILED DESCRIPTION OF THE INVENTION Attention is first directed to FIG. 1 which shows a well bore 10 having casing 12 which is set through an upper petroleum productive zone 14 and a lower producing zone 16 separated by a non-productive layer 15 such as shale. Zones l4 and 16 are each unconsolidated zones, i.e. In the absence of preventative action, entrained sand is produced with the produced fluid. Casing 12 has upper perforations 18 and lower perforations 20 which are at the elevation of zones 14 and 16 respectively.

A tubing string 22, through which the fluid is to be produced, is suspended in the well bore. The tubing string, sometimes called a "completion string", is provided with an upper sand screen 24 and a lower sand screen 26 which are placed at about the levels of perforations I8 and perforations 20 respectively. These sand screens are a special type sand screen which is described in co-pending application Ser. No. 77,492 supra. These are special type multi-layer filters which have been found in many cases to be more efficient and longer lasting than gravel pack. In most cases no gravel packing is needed with these multi-layer sand screens. Typically these screens comprise a filter of a plurality of concentric screens spaced radially from one another, the opening in any one screen being no larger than the openings in any screen of larger diameter and no smaller than the openings in any screen of smallerdiameter. An upper packer 28 is provided in the annulus about tubing string 22 at a point slightly above upper screen 24. A lower packer 30 is placed about tubing 22 between screens 24 and 26. Various packers are suitable for this operation. For example, the packer designated Husky M-l manufactured by Brown Oil Tool of 7400 E. Slauson AvenueLos Angeles, Calif. is quite suitable for packer 28 and a Brown Oil Tool packer model DBL is quite suitable for packer 30.

Tubing 22 is provided with two valves which permits the upper part of the tubing string to be in fluid communication with either the interior of the upper or lower sand screens. As shown in FIG. 2 this includes a sleeve valve or valves 32 which is inserted in the tubing string interior of upper screen 24 and a valve means or plug means 34 in the tubing string between the two sand screens. A suitable valve 32 is a model L sliding sleeve valve commercially available from Baker Oil Tools, Inc. A suitable plug means 34 is designated a Model F non ported seating nipple, also available from Baker.

Attention is directed to FIG. 2 for a more detailed illustration for an upper sand screen 24. As can be seen, this sand screen is placed about a slotted liner and has an inner layer 42, an intermediate layer and an outer layer 46. Each of these layers are formed preferably by wire wound in a spiral with selected spacing between the adjacent turns all as described in said application Ser. No. 77,492. The upper end and the lower end of the annulus between tubing 22 and the filter are closed by any means such as bushings with o-rings or packing 23 and 25.

Referring back to FIG. 1, a pump 48 or any other type artificial lift, if needed, can be provided above packer 28. The equipment shown in FIG. 1 permits sand free fluid to be produced selectively from either the upper or lower zones. The sleeve valve 32 and the plug valve 34 can be opened or closed from the surface using simple wireline equipment.

The equipment shown in FIG. 1 can all be set on one trip after the lower packer has been set by wireline. [If desired, both packers and the completion string can be run on the same trip. All that is necessary in this case is to use compatible packers, i.e. a mechanical packer (such as Brown Oil Tool Husky) as the lower packer and a hydrostatic (such as Baker Oil Tools, Inc. Model FH) packer as the upper packer. In this method wireline work is eliminated.) Lower sand screen 26 is supported at this stage from packer 30 by tailpipe 27. All that is then necessary is running the completion string (tubing 22, screen 24, plug 34, packer 28 etc.) in sequence as is shown on FIG. 1. (All components screw into each other.) When the completion string is in the hole, a seal assembly in the tubing string below plug 34 and not specifically shown, is stung into the lower packer 30. The upper packer is then set by weight and- /or rotation. The tubing is then hung off in the tree and the well placed on production. Specific details of each step of this running operation are not given as they are known to those skilled in the art.

While the above description has been made in detail, various modifications can be made thereto without departing from the spirit or scope of the invention.

We claim:

1. A system for completing a well having an upper unconsolidated producing formation and a lower unconsolidated producing formation which comprises:

' a casing having upper perforations and lower perforations at the elevations of said upper and lower formation respectively;

a string of tubing in said casing, said string having no other string within its interior;

a sleeve valve in said string of tubing at theelevation of said upper zone,

an upper sand screen surrounding said sleeve valve;

a lower sand screen connected to the lower end of said string of tubing;

a packer placed about said string of tubing between said upper and said lower sand screen filters;

a tubing valve means at a selected location in said string of tubing between said sleeve valve and said lower sand screen operable from the surface to open or close said string of tubing at said selected location.

2. A system as defined in claim 1 including a packer about said tubing string above said upper sand screen.

3. A system as defined in claim 1 in which said upper and lower sand screens each comprise a filter of a plurality of concentric screens spaced radially from one another, the opening in any one screen being no larger than the openings in any screen of larger diameter and no smaller than the openings in any screen of smaller diameter.

t ti 4! t t

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4167972 *Dec 23, 1977Sep 18, 1979Uop Inc.Well screen mounting arrangement
US5579844 *Feb 13, 1995Dec 3, 1996Osca, Inc.Single trip open hole well completion system and method
US5609204 *Jan 5, 1995Mar 11, 1997Osca, Inc.Isolation system and gravel pack assembly
US5865251 *Dec 12, 1996Feb 2, 1999Osca, Inc.Isolation system and gravel pack assembly and uses thereof
US6488082 *Jan 23, 2001Dec 3, 2002Halliburton Energy Services, Inc.Remotely operated multi-zone packing system
US6631767Nov 16, 1999Oct 14, 2003Schlumberger Technology CorporationMethod and apparatus for selective injection or flow control with through-tubing operation capacity
US6782948 *Sep 5, 2002Aug 31, 2004Halliburton Energy Services, Inc.Remotely operated multi-zone packing system
US6786285Jun 12, 2002Sep 7, 2004Schlumberger Technology CorporationFlow control regulation method and apparatus
US6857475Oct 9, 2001Feb 22, 2005Schlumberger Technology CorporationApparatus and methods for flow control gravel pack
US6892816 *Jun 18, 2001May 17, 2005Schlumberger Technology CorporationMethod and apparatus for selective injection or flow control with through-tubing operation capacity
US6983796 *Jan 5, 2001Jan 10, 2006Baker Hughes IncorporatedMethod of providing hydraulic/fiber conduits adjacent bottom hole assemblies for multi-step completions
US7017664Mar 11, 2002Mar 28, 2006Bj Services CompanySingle trip horizontal gravel pack and stimulation system and method
US7048061 *Feb 21, 2003May 23, 2006Weatherford/Lamb, Inc.Screen assembly with flow through connectors
US7124824 *Feb 12, 2003Oct 24, 2006Bj Services Company, U.S.A.Washpipeless isolation strings and methods for isolation
US7152678Feb 27, 2004Dec 26, 2006Bj Services Company, U.S.A.System and method for downhole operation using pressure activated valve and sliding sleeve
US7198109Feb 12, 2003Apr 3, 2007Bj Services CompanyDouble-pin radial flow valve
US7201232 *Nov 13, 2003Apr 10, 2007Bj Services CompanyWashpipeless isolation strings and methods for isolation with object holding service tool
US7210527Mar 27, 2006May 1, 2007Bj Services Company, U.S.A.Single trip horizontal gravel pack and stimulation system and method
US7331388Feb 6, 2006Feb 19, 2008Bj Services CompanyHorizontal single trip system with rotating jetting tool
US7472750Mar 27, 2007Jan 6, 2009Bj Services Company U.S.A.Single trip horizontal gravel pack and stimulation system and method
US7665526Feb 23, 2010Bj Services Company, U.S.A.System and method for downhole operation using pressure activated and sleeve valve assembly
US8276674Oct 2, 2012Schlumberger Technology CorporationDeploying an untethered object in a passageway of a well
US8505632May 20, 2011Aug 13, 2013Schlumberger Technology CorporationMethod and apparatus for deploying and using self-locating downhole devices
US8511380Oct 6, 2008Aug 20, 2013Schlumberger Technology CorporationMulti-zone gravel pack system with pipe coupling and integrated valve
US9062530Feb 7, 2012Jun 23, 2015Schlumberger Technology CorporationCompletion assembly
US9200502Jun 14, 2012Dec 1, 2015Schlumberger Technology CorporationWell-based fluid communication control assembly
US9238953Nov 8, 2011Jan 19, 2016Schlumberger Technology CorporationCompletion method for stimulation of multiple intervals
US20020007948 *Jan 5, 2001Jan 24, 2002Bayne Christian F.Method of providing hydraulic/fiber conduits adjacent bottom hole assemblies for multi-step completions
US20030178198 *Feb 12, 2003Sep 25, 2003Dewayne TurnerWashpipeless isolation strings and methods for isolation
US20030221839 *Feb 12, 2003Dec 4, 2003Dewayne TurnerDouble-pin radial flow valve
US20040106592 *Nov 12, 2003Jun 3, 2004Vicente Maria Da Graca HenriquesChelation of charged and uncharged molecules with porphyrin-based compounds
US20040163804 *Feb 21, 2003Aug 26, 2004Jeffrey BodeScreen assembly with flow through connectors
US20040244976 *Feb 27, 2004Dec 9, 2004Dewayne TurnerSystem and method for downhole operation using pressure activated valve and sliding sleeve
US20060162927 *Mar 27, 2006Jul 27, 2006Bj Services Company, U.S.A.Single trip horizontal gravel pack and stimulation system and method
US20060231253 *Feb 6, 2006Oct 19, 2006Vilela Alvaro JHorizontal single trip system with rotating jetting tool
US20070119598 *Dec 21, 2006May 31, 2007Bj Services Company, U.S.A.System and method for downhole operation using pressure activated and sleeve valve assembly
US20070187095 *Mar 27, 2007Aug 16, 2007Bj Services Company, U.S.A.Single trip horizontal gravel pack and stimulation system and method
US20090084553 *Mar 28, 2008Apr 2, 2009Schlumberger Technology CorporationSliding sleeve valve assembly with sand screen
US20090095471 *Oct 6, 2008Apr 16, 2009Schlumberger Technology CorporationMulti-zone gravel pack system with pipe coupling and integrated valve
US20110056692 *Nov 12, 2010Mar 10, 2011Lopez De Cardenas JorgeSystem for completing multiple well intervals
USRE40648 *Feb 26, 2007Mar 10, 2009Bj Services Company, U.S.A.System and method for downhole operation using pressure activated valve and sliding sleeve
WO1996021082A1 *Dec 27, 1995Jul 11, 1996Osca, Inc.Improved isolation system and gravel pack assembly and uses thereof
WO1996025583A1 *Feb 9, 1996Aug 22, 1996Osca, Inc.Single trip open hole well completion system and method
Classifications
U.S. Classification166/184, 166/234
International ClassificationE21B43/14, E21B43/00, E21B43/02
Cooperative ClassificationE21B43/14, E21B43/02
European ClassificationE21B43/02, E21B43/14