US3130783A - Cementing well pipe in stages - Google Patents

Cementing well pipe in stages Download PDF

Info

Publication number
US3130783A
US3130783A US21430062A US3130783A US 3130783 A US3130783 A US 3130783A US 21430062 A US21430062 A US 21430062A US 3130783 A US3130783 A US 3130783A
Authority
US
Grant status
Grant
Patent type
Prior art keywords
ports
well pipe
sleeve valve
mandrel
sleeve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
Inventor
Willis P Orr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JERSEY PROD RES CO
JERSEY PRODUCTION RESEARCH Co
Original Assignee
JERSEY PROD RES CO
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Grant date

Links

Images

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00Sealing or packing boreholes or wells
    • E21B33/10Sealing or packing boreholes or wells in the borehole
    • E21B33/13Methods or devices for cementing, for plugging holes, crevices, or the like
    • E21B33/14Methods or devices for cementing, for plugging holes, crevices, or the like for cementing casings into boreholes
    • E21B33/146Stage cementing, i.e. discharging cement from casing at different levels

Description

April 28, 1964 .w. P. ORR 3,130,783

CEMENTING WELL PIPE IN STAGES 7 Filed Aug. 2, 1962 2 Sheets-Sheet 1 INVENTOR.

WILLIS P, ORR,

BFMMM ATTORNEY.

w. P. ORR

CEMENTING WELL PIPE IN STAGES 2 Sheets-Sheet 2 INVENTOR. L a /w ATTORNEY.

April 28, 1964 Filed Aug. 2, 1962 United States Patent Oflfice 3,130,783 Patented Apr. 28, 1964 a corporation of Delaware Filed Aug. 2, 1962, Ser. No. 214,300 2 Claims. (Cl. 16626) This invention concerns apparatus for use in a technique for cementing well pipe in a borehole in two or more stages, and in particular, it concerns a staging tool or tools arranged along the length of a well pipe in a manner such that carrying out of a stage cementing operation is facilitated.

Stage cementing of well pipe has important advantages in many wells over single column cementing. It reduces the possibility of breaking down a weak formation with the high cementing pressures required to lift a long column of cement; it minimizes cement contamination during long column cementing; it reduces the quantity of cement required when it is desired to cement widely separated or spaced intervals; and it is useful in placing a cement sheath as a substitute for surface casing.

However, these advantages in operations are offset when presently available staging techniques and tools are used, for in these techniques to complete the Well after stage cementing operations, it is necessary to drill out cement, plugs, and the stage tool or tools left in the well pipe.

Thus, the staging tool of the invention overcomes disadvantages in the use of available tools by eliminating the necessity of drilling out the tool and by leaving the well pipe full of displacing fluid instead of having a portion of the well pipe filled with cement. In the arrangement of the apparatus, the entire length of the well pipe is accessible for work-over operations.

In known stage cementing techniques also, the rubber plugs used to spot the stage cement remain in the well pipe and are difiicult to drill out. In the present technique, no plug is left in the well pipe, and consequently, drilling out of it prior to cementing in the later stages is eliminated.

The staging tool of the invention permits cementing of upper sands; cementing olf of a water sand; and placing of cement as a substitute for surface casing.

Thus, a primary object of the present invention is to provide an improved stage cementing tool and a stage cementing technique for use therewith.

In brief, the cement staging tool comprises a tubular housing or mandrel adapted to be arranged in a well pipe and having circular ports or flow passageways therein, each containing fluid pressure releasable plug means initially closing off fluid communication between the interior and exterior of said well pipe through said mandrel and releasable to establish fluid communication between the interior and exterior of said well pipe through said mandrel when sufiicient fluid pressure is applied against said plug means from within said well pipe; and longitudinally movable positive closure means arranged within said mandrel adapted to close off fluid communication through said ports after said plug means have been released when in an upper position and adapted to permit fluid communication through said ports after said plug means have been released when in a lower position.

The above object and other objects and advantages of the invention will be apparent from a more detailed description thereof when taken with the drawings wherein:

FIG. 1 is a vertical, partly-sectional view of the staging tool of the invention;

FIG. 2 is a view similar to that shown in FIG. 1, except the plugs shown in FIG. 1 having been released are being replaced with balls to illustrate a step in the operation which assures that all of the ports have opened.

FIG. 3 is a view taken on lines 33 of FIG. 2; and

FIG. 4 is a schematic illustration of a typical use of the staging tool of FIGS. 1 to 3.

For a more complete description of the invention, reference now is made to the drawings in greater detail.

As seen in FIG. 1, the staging tool comprises a sub or mandrel 10 provided with threaded end portions 12 and 13 for threadedly connecting mandrel 10 in a well pipe 14 (see FIG. 4), which in turn is supported in a borehole 15 from a wellhead 16.

Mandrel 10 is provided with a series of (preferably four) laterally spaced-apart circular ports 17 (see FIG. 3 also). Each port initially contains a plug 18 which is provided with a seal 19 for closing off the space between plug 18 and the Wall of the port. Plugs 18 are releasably attached to mandrel 10 by means of shear pins 20. A sliding sleeve valve 21, having upper and lower positions and a series of laterally spaced-apart openings 22, each circularly configured and larger than each port 17, is arranged within mandrel 10 such that each opening 22 is circumferentially or laterally aligned with one of the ports 17. The upper end of sleeve valve 21 is split to form a plurality of expansible fingers 23, which have formed thereon latching shoulders 24. The lower end of sleeve valve 21 is indented to form a square shoulder 25, which initially rests on a square shoulder 26 formed on the interior wall of mandrel 10. Sleeve valve 21 is notched above shoulder 25 and below openings 22, as at 27. Also, the inner wall of mandrel 10 is slotted above shoulder 26, as at 28, and a square shouldered snap ring 29 is arranged in the slot. When sleeve valve 21 is in its lower position, as seen in FIGS. 1 and 2, notch 27 is adjacent slot 28, and openings 22 and ports 17 are vertically aligned. Sealing elements 30 and 31 are provided on the inner wall of mandrel 10 above and below ports 17. Snap ring 29 engages beveled shoulder notch 27 when sleeve valve 21 is in its lower position and temporarily locks the sleeve valve in this position. In the upper position of sleeve valve 21, not shown, square shoulder 25 rests on square shouldered snap ring 29 to permanently lock sleeve valve 21 in this position. Also, in this position, openings 22 are positioned above upper sealing element 30, which seals off fluid communication between openings 22 and ports 17.

The operation of a two-stage cementing technique utilizing one staging tool for a Well containing only one long pipe string is illustrated in FIG. 4, and this operation now will be described.

To cement the first stage, the well is conditioned as required, and the first stage cement is pumped from cement truck 35 through conduits 36 and 37 into well pipe 14, which is provided with a conventional cement shoe 38. A volume of cement sufficient to cement off an interval 39 is pumped down well pipe 14 past the stage tool and through cement shoe 38 and up the annulus between the wall of borehole 15 and well pipe 14, as indicated at 40, the predetermined volume of cement being followed by a cement top plug 41 and follow-up fluid pumped by pump 42 through conduit 37 until plug 41 is positioned atop cement shoe 38, as illustrated. Well fluid in the annulus between the well pipe and the borehole wall 15 is displaced upwardly through the annulus to the earths surface.

During the first stage cementing, the stage tool is arranged as illustrated in FIG. 1; that is, the sleeve valve is open and releasable plugs 18 maintain the ports 17 in mandrel 10 closed.

The second stage cement slurry is now placed in the annulus by first'pumping fluid by means of pump 42 into well pipe 14 by way of conduit 37, and additional pressure, 1000 to 3000 p.s.i. above the pressure used for the first stage cementing job, is applied to fracture shear pins 20 of each of the releasable pump-out plugs 18 and flush these plugs from ports 17.

To insure that all of the plugs have been flushed out of ports 17, port closure balls 9 are placed in the fluid circulated down well pipe 14, through openings 22 and one or more of the ports 17 and up the annulus between well pipe 14 and borehole wall 15 to seal off openings 22, which also seals off ports 17. The balls insure that all of ports 17 open. For example, if only two plugs 18 are flushed out, two balls 9 lodge in the two openings 22 aligned with the two ports 17, from which these plugs were flushed, which permits fluid pressure to increase and force release of the remaining plugs. When the balls fill all of the ports 17, the fluid pressure builds up, assuring that all of the pump-out plugs 18 have been flushed out. FIGS. 2 and 3 show three balls positioned in ports 17. When all of the balls are positioned in the ports, fluid pressure on the balls is released, and the balls drop to the bottom of the well pipe 14 (see FIG. 4). FIG. 2 also illustrates a ball (dotted lines) dropping from its position in a port 17.

Once the balls have been removed from their positions in ports 17, the second stage cement slurry from cement truck 35 is pumped through conduits 36 and 37 into well pipe 14 through openings 22 and 17 into the annulus between well pipe 14 and the wall of borehole 15. The desired volume of cement for the second stage designated 45 is followed by displacing fluid pumped into well pipe 14 by means of pump 42. Then while pressure is maintained within well pipe 14, sleeve valve 21 is moved to its upper, closed position by lowering a wire line tool, not shown, into well pipe 14 to adjacent sleeve valve 21 to engage shoulder 24 and raise sleeve valve 21 upwardly until shoulder 25 is latched by snap ring 29. Sliding sleeve valve 21 can be locked in this position, since there is no further need for opening this valve.

By use of this technique the well pipe 14 is only left with cement displacing fluid following the cementing operation. The well pipe is fully open. There are no plugs or tools or cement to drill out for additional cementing stages. The advantages of closing the stage tool by moving sleeve 21 up instead of down are: (1) the tight fitting wiper plug used to displace the first stage cement cannot even inadvertently move sleeve 21 to its closed position; and (2) swabbing operations subsequent to cementing do not tend to open the stage tool by moving sleeve 21 upwardly; the uppermost shoulder in mandrel prevents further upward movement of sleeve 21 when it is in the closed position.

Although in the foregoing description of the invention only the setting of a surface sheath of cement was described, other second-stage cementing operations may be performed. Additionally, although only a two-stage cementing operation using one well pipe and one staging tool was described to illustrate the invention, three or more cementing stages using additional staging tools may be carried out. When more than one staging tool is used, each tool is positioned adjacent the place the cement is to be spotted, and to prevent the upper tool from frac turing shear pins 20 prematurely, the relative strengths of the shear pins of each tool may be increased from the lowermost to the uppermost tools. Also, cementing operations may be carried out using the staging tools in multiple tubingless completions, in which case one or more of the tools would be arranged in each of several strings of easing.

Having fully described the nature, operation, elements, and objects of my invention, I claim:

1. Apparatus for use in stage cementing of well pipe in a borehole comprising: a mandrel adapted to be connected in said well pipe and provided with at least two laterally spaced-apart circular ports; fluid pressure releasable plug means initially secured in each port; a slidable sleeve valve longitudinally movable within said mandrel and provided with at least two openings, each of which is larger than each of said ports; sealing means arranged between said sleeve valve and said mandrel above and below said ports and said openings when said ports and said openings are aligned; said openings and said ports being aligned when said sleeve valve is in a lower position to fluidly communicate the interior of said sleeve and said ports, said sleeve when in an upper position being adapted to close off fluid communication between the interior of said sleeve valve and said port; and stop means on said mandrel adapted to limit further downward movement of said sleeve valve Within said mandrel when said sleeve valve is in its lower position; and means for locking said sleeve valve in its upper closed position.

2. A method for use in stage cementing of well pipe in a borehole using apparatus which comprises: a mandrel adapted to be connected in said well pipe and provided with at least two laterally spaced-apart circular ports; a fluid-pressure releasable plug releasably secured in each of said ports; a slidable sleeve longitudinally movable within said mandrel and having at least two openings therein larger than said ports and aligned with i said ports when said valve is in a lower position to fluidly communicate the interior or" said sleeve and said ports; sealing means arranged between said sleeve and said mandrel adapted when said sleeve is in an upper position to close off fluid communication between the interior of said sleeve and said ports; and means for locking said sleeve in its upper closed position comprising the steps of: pumping fluid into said well pipe and increasing fluid pressure within said well pipe until at least one of said fluid pressure releasable plugs is released and flushed from its port; circulating fluid down said well pipe and through said openings in said sleeve and said mandrel ports and up the annulus surrounding said well pipe; adding balls to said fluid to seal off said ports with said balls after the ports have been opened by flushing out the plugs to assure opening of all of the ports; releasing the fluid pressure to permit the balls lodged in the ports to drop out of them into the bottom of the borehole; pumping a cement slurry into said well pipe and through said openings in said sleeve and said mandrel ports and depositing said cement slurry in the annulus surrounding the well pipe; and then while maintaining pressure in said well pipe moving said sleeve to its closed position to seal ofl said mandrel ports.

References Cited in the file of this patent UNITED STATES PATENTS 2,603,293 Lynes July 15, 1952 2,659,438 Schnitter Nov. 17, 1953 2,836,246 Hoch May 27, 1958

Claims (1)

1. APPARATUS FOR USE IN STAGE CEMENTING OF WELL PIPE IN A BOREHOLE COMPRISING: A MANDREL ADAPTED TO BE CONNECTED IN SAID WELL PIPE AND PROVIDED WITH AT LEAST TWO LATERALLY SPACED-APART CIRCUIT PORTS; FLUID PRESSURE RELEASABLE PLUG MEANS INITIALLY SECURED IN EACH PORT; A SLIDABLE SLEEVE VALVE LONGITUDINALLY MOVABLE WITHIN SAID MANDREL AND PROVIDED WITH AT LEAST TWO OPENINGS, EACH OF WHICH IS LARGER THAN EACH OF SAID PORTS; SEALING MEANS ARRANGED BETWEEN SAID SLEEVE VALVE AND SAID MANDREL ABOVE AND BELOW SAID PORTS AND SAID OPENINGS WHEN SAID PORTS AND SAID OPENINGS ARE ALIGNED; SAID OPENINGS AND SAID PORTS BEING ALIGNED WHEN SAID SLEEVE VALVE IS IN A LOWER POSITION TO FLUIDLY COMMUNICATE THE INTERIOR OF SAID SLEEVE AND SAID PORTS, SAID SLEEVE WHEN IN AN UPPER POSITION BEING ADAPTED TO CLOSE OFF FLUID COMMUNICATION BETWEEN THE INTERIOR OF SAID SLEEVE VALVE AND SAID PORT; AND STOP MEANS ON SAID MANDREL ADAPTED TO LIMIT FURTHER DOWNWARD MOVEMENT OF SAID SLEEVE VALVE WITHIN SAID MANDREL WHEN SAID SLEEVE VALVE IS IN ITS LOWER POSITION; AND MEANS FOR LOCKING SAID SLEEVE VALVE IN ITS UPPER CLOSED POSITION.
US3130783A 1962-08-02 1962-08-02 Cementing well pipe in stages Expired - Lifetime US3130783A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US3130783A US3130783A (en) 1962-08-02 1962-08-02 Cementing well pipe in stages

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US3130783A US3130783A (en) 1962-08-02 1962-08-02 Cementing well pipe in stages

Publications (1)

Publication Number Publication Date
US3130783A true US3130783A (en) 1964-04-28

Family

ID=22798556

Family Applications (1)

Application Number Title Priority Date Filing Date
US3130783A Expired - Lifetime US3130783A (en) 1962-08-02 1962-08-02 Cementing well pipe in stages

Country Status (1)

Country Link
US (1) US3130783A (en)

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3456725A (en) * 1967-02-13 1969-07-22 Completion Tools Inc Apparatus for selectively completing an oil well
US3474866A (en) * 1965-10-23 1969-10-28 Fenix & Scisson Inc Method of and means for sealing casing strings
US3752232A (en) * 1972-01-12 1973-08-14 Atlantic Richfield Co Well tool and method for using same
US3791448A (en) * 1972-12-11 1974-02-12 Atlantic Richfield Co Well completion method
US4176717A (en) * 1978-04-03 1979-12-04 Hix Harold A Cementing tool and method of utilizing same
US4345651A (en) * 1980-03-21 1982-08-24 Baker International Corporation Apparatus and method for the mechanical sequential release of cementing plugs
US5758726A (en) * 1996-10-17 1998-06-02 Halliburton Energy Services Ball drop head with rotating rings
US20050263284A1 (en) * 2004-05-28 2005-12-01 Justus Donald M Hydrajet perforation and fracturing tool
US20070062706A1 (en) * 2005-09-20 2007-03-22 Leising Lawrence J Downhole Tool Actuation Apparatus and Method
US20080190611A1 (en) * 2007-02-12 2008-08-14 Halliburton Energy Services, Inc. Systems for actuating a downhole tool
WO2008146012A2 (en) * 2007-06-01 2008-12-04 Churchill Drilling Tools Limited Downhole apparatus
US20100000794A1 (en) * 2005-11-21 2010-01-07 Hall David R Lead the Bit Rotary Steerable Tool
US20100212966A1 (en) * 2009-02-24 2010-08-26 Hall David R Downhole Tool Actuation
US20100212886A1 (en) * 2009-02-24 2010-08-26 Hall David R Downhole Tool Actuation having a Seat with a Fluid By-Pass
US20100314126A1 (en) * 2009-06-10 2010-12-16 Baker Hughes Incorporated Seat apparatus and method
US8267196B2 (en) 2005-11-21 2012-09-18 Schlumberger Technology Corporation Flow guide actuation
US8281882B2 (en) 2005-11-21 2012-10-09 Schlumberger Technology Corporation Jack element for a drill bit
US8297375B2 (en) 2005-11-21 2012-10-30 Schlumberger Technology Corporation Downhole turbine
US8360174B2 (en) 2006-03-23 2013-01-29 Schlumberger Technology Corporation Lead the bit rotary steerable tool
US8365820B2 (en) 2010-10-29 2013-02-05 Hall David R System for a downhole string with a downhole valve
US8408336B2 (en) 2005-11-21 2013-04-02 Schlumberger Technology Corporation Flow guide actuation
US8640768B2 (en) 2010-10-29 2014-02-04 David R. Hall Sintered polycrystalline diamond tubular members
US20140251628A1 (en) * 2013-03-08 2014-09-11 James F. Wilkin Anti-Rotation Assembly for Sliding Sleeve

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2603293A (en) * 1952-07-15 Lynes
US2659438A (en) * 1946-08-16 1953-11-17 L L Rector Means for cementing wells
US2836246A (en) * 1956-08-30 1958-05-27 Phillips Petroleum Co Method of removing liquid from well bore hole

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2603293A (en) * 1952-07-15 Lynes
US2659438A (en) * 1946-08-16 1953-11-17 L L Rector Means for cementing wells
US2836246A (en) * 1956-08-30 1958-05-27 Phillips Petroleum Co Method of removing liquid from well bore hole

Cited By (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3474866A (en) * 1965-10-23 1969-10-28 Fenix & Scisson Inc Method of and means for sealing casing strings
US3456725A (en) * 1967-02-13 1969-07-22 Completion Tools Inc Apparatus for selectively completing an oil well
US3752232A (en) * 1972-01-12 1973-08-14 Atlantic Richfield Co Well tool and method for using same
US3791448A (en) * 1972-12-11 1974-02-12 Atlantic Richfield Co Well completion method
US4176717A (en) * 1978-04-03 1979-12-04 Hix Harold A Cementing tool and method of utilizing same
US4345651A (en) * 1980-03-21 1982-08-24 Baker International Corporation Apparatus and method for the mechanical sequential release of cementing plugs
US5758726A (en) * 1996-10-17 1998-06-02 Halliburton Energy Services Ball drop head with rotating rings
US20050263284A1 (en) * 2004-05-28 2005-12-01 Justus Donald M Hydrajet perforation and fracturing tool
US7159660B2 (en) * 2004-05-28 2007-01-09 Halliburton Energy Services, Inc. Hydrajet perforation and fracturing tool
US7640991B2 (en) * 2005-09-20 2010-01-05 Schlumberger Technology Corporation Downhole tool actuation apparatus and method
US20070062706A1 (en) * 2005-09-20 2007-03-22 Leising Lawrence J Downhole Tool Actuation Apparatus and Method
US8281882B2 (en) 2005-11-21 2012-10-09 Schlumberger Technology Corporation Jack element for a drill bit
US8267196B2 (en) 2005-11-21 2012-09-18 Schlumberger Technology Corporation Flow guide actuation
US8297375B2 (en) 2005-11-21 2012-10-30 Schlumberger Technology Corporation Downhole turbine
US20100000794A1 (en) * 2005-11-21 2010-01-07 Hall David R Lead the Bit Rotary Steerable Tool
US8522897B2 (en) 2005-11-21 2013-09-03 Schlumberger Technology Corporation Lead the bit rotary steerable tool
US8408336B2 (en) 2005-11-21 2013-04-02 Schlumberger Technology Corporation Flow guide actuation
US8360174B2 (en) 2006-03-23 2013-01-29 Schlumberger Technology Corporation Lead the bit rotary steerable tool
US20080190613A1 (en) * 2007-02-12 2008-08-14 Halliburton Energy Services, Inc. Methods for actuating a downhole tool
US20080190611A1 (en) * 2007-02-12 2008-08-14 Halliburton Energy Services, Inc. Systems for actuating a downhole tool
US7549475B2 (en) 2007-02-12 2009-06-23 Halliburton Energy Services, Inc. Systems for actuating a downhole tool
WO2008146012A2 (en) * 2007-06-01 2008-12-04 Churchill Drilling Tools Limited Downhole apparatus
WO2008146012A3 (en) * 2007-06-01 2009-06-04 Churchill Drilling Tools Ltd Downhole apparatus
US9133674B2 (en) 2009-02-24 2015-09-15 Schlumberger Technology Corporation Downhole tool actuation having a seat with a fluid by-pass
US20100212885A1 (en) * 2009-02-24 2010-08-26 Hall David R Downhole Tool Actuation having a Seat with a Fluid By-Pass
US20100212966A1 (en) * 2009-02-24 2010-08-26 Hall David R Downhole Tool Actuation
US8365843B2 (en) 2009-02-24 2013-02-05 Schlumberger Technology Corporation Downhole tool actuation
US9127521B2 (en) 2009-02-24 2015-09-08 Schlumberger Technology Corporation Downhole tool actuation having a seat with a fluid by-pass
US8365842B2 (en) 2009-02-24 2013-02-05 Schlumberger Technology Corporation Ratchet mechanism in a fluid actuated device
US8371400B2 (en) 2009-02-24 2013-02-12 Schlumberger Technology Corporation Downhole tool actuation
US20100212886A1 (en) * 2009-02-24 2010-08-26 Hall David R Downhole Tool Actuation having a Seat with a Fluid By-Pass
US20100314126A1 (en) * 2009-06-10 2010-12-16 Baker Hughes Incorporated Seat apparatus and method
US9316089B2 (en) 2009-06-10 2016-04-19 Baker Hughes Incorporated Seat apparatus and method
US8640768B2 (en) 2010-10-29 2014-02-04 David R. Hall Sintered polycrystalline diamond tubular members
US8365820B2 (en) 2010-10-29 2013-02-05 Hall David R System for a downhole string with a downhole valve
US20140251628A1 (en) * 2013-03-08 2014-09-11 James F. Wilkin Anti-Rotation Assembly for Sliding Sleeve

Similar Documents

Publication Publication Date Title
US3361204A (en) Method and apparatus for treating an underground formation
US3460625A (en) Methods and apparatus for bridging a well conduit
US3270814A (en) Selective completion cementing packer
US3289762A (en) Multiple fracturing in a well
US3375874A (en) Subsurface well control apparatus
US3460624A (en) Thru-tubing bridge plug
US3327781A (en) Methods for performing operations in a well bore
US3269463A (en) Well pressure responsive valve
US3356140A (en) Subsurface well bore fluid flow control apparatus
US3371717A (en) Multiple zone well production apparatus
US3174547A (en) Well bore apparatus
US3122205A (en) Well packer assemblies
US3062296A (en) Differential pressure fill-up shoe
US3554281A (en) Retrievable circulating valve insertable in a string of well tubing
US3282342A (en) Well packer
US3151839A (en) Two-way flapper-type valve
US3277962A (en) Gravel packing method
US2978046A (en) Off-bottom drill stem tester
US3180419A (en) Hydrostatic pressure set well packer
US6148915A (en) Apparatus and methods for completing a subterranean well
US3616850A (en) Cementing plug launching mandrel
US5090481A (en) Fluid flow control apparatus, shifting tool and method for oil and gas wells
US5325917A (en) Short stroke casing valve with positioning and jetting tools therefor
US4105069A (en) Gravel pack liner assembly and selective opening sleeve positioner assembly for use therewith
US3865188A (en) Method and apparatus for selectively isolating a zone of subterranean formation adjacent a well