CA2008152A1 - Downhole pump - Google Patents
Downhole pumpInfo
- Publication number
- CA2008152A1 CA2008152A1 CA 2008152 CA2008152A CA2008152A1 CA 2008152 A1 CA2008152 A1 CA 2008152A1 CA 2008152 CA2008152 CA 2008152 CA 2008152 A CA2008152 A CA 2008152A CA 2008152 A1 CA2008152 A1 CA 2008152A1
- Authority
- CA
- Canada
- Prior art keywords
- well
- housing
- motor means
- pump
- well fluids
- 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.)
- Abandoned
Links
- 239000012530 fluid Substances 0.000 claims abstract description 65
- 230000002706 hydrostatic effect Effects 0.000 claims abstract description 8
- 230000000694 effects Effects 0.000 claims description 7
- 229910000938 samarium–cobalt magnet Inorganic materials 0.000 claims description 5
- 230000003213 activating effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- FWQOXFQRLISKCM-UHFFFAOYSA-N [Co].[Nd] Chemical compound [Co].[Nd] FWQOXFQRLISKCM-UHFFFAOYSA-N 0.000 claims 4
- 230000004913 activation Effects 0.000 claims 4
- 238000005259 measurement Methods 0.000 claims 1
- 238000003780 insertion Methods 0.000 abstract description 3
- 230000037431 insertion Effects 0.000 abstract description 3
- 230000008878 coupling Effects 0.000 description 7
- 238000010168 coupling process Methods 0.000 description 7
- 238000005859 coupling reaction Methods 0.000 description 7
- 239000003350 kerosene Substances 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 230000009467 reduction Effects 0.000 description 3
- 230000008093 supporting effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- 208000036366 Sensation of pressure Diseases 0.000 description 1
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006854 communication Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/06—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for setting packers
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/003—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings with electrically conducting or insulating means
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/08—Introducing or running tools by fluid pressure, e.g. through-the-flow-line tool systems
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/127—Packers; Plugs with inflatable sleeve
- E21B33/1275—Packers; Plugs with inflatable sleeve inflated by down-hole pumping means operated by a down-hole drive
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Reciprocating Pumps (AREA)
Abstract
DOWNHOLE PUMP
ABSTRACT OF THE DISCLOSURE
A downhole pump is provided having characteristics that permit it to be installed in a subterranean well in order to pump well fluids at a substantial pressure to operate a downhole tool, such as an inflatable packer. The pump is mechanically driven by motor means whose diameter permits insertion through the well and whose output characteristics are suitable for driving the pump means. A single mounting bracket supports the motor means in a housing and prevents counter rotation of the motor stators. The motor means are immersed in a clean fluid inserted at the well surface and the clean fluid is maintained at the well hydrostatic pressure by a compensating piston.
ABSTRACT OF THE DISCLOSURE
A downhole pump is provided having characteristics that permit it to be installed in a subterranean well in order to pump well fluids at a substantial pressure to operate a downhole tool, such as an inflatable packer. The pump is mechanically driven by motor means whose diameter permits insertion through the well and whose output characteristics are suitable for driving the pump means. A single mounting bracket supports the motor means in a housing and prevents counter rotation of the motor stators. The motor means are immersed in a clean fluid inserted at the well surface and the clean fluid is maintained at the well hydrostatic pressure by a compensating piston.
Description
~(~J ~ r~
DOWNHOLE PUMP
1. FIELD OF THE INVENTIOM: The invention relates to a motor and pump construction preferably dimensioned to permit the insertion of the motor and pump unit through a previously installed tubing string in a subterranean well. The pump is utilized to pump well fluids for the operation or a downhole tool, such as an inflatable packer.
DOWNHOLE PUMP
1. FIELD OF THE INVENTIOM: The invention relates to a motor and pump construction preferably dimensioned to permit the insertion of the motor and pump unit through a previously installed tubing string in a subterranean well. The pump is utilized to pump well fluids for the operation or a downhole tool, such as an inflatable packer.
2. SU~ RY OF THE PRIOR ART: Inflatable pac~ers which are operable by well fluids pressurized by a downhole motor driven ~ump have been previously disclosed. See, for , /G(/I. /
exam~le, U.S. patent ~2,681~706 to POTTORF and patent ~2,839,142 to dUBE~. While each of these patents disclose a motor and pump unit which is insertable into a well through a previously installed casing and operates to pump well fluids to expand an inflatable ?ac~er, these prior art references furnish no infor-mation as to the electrical and mechanical charac'eristics o the motor that are reauired to effect an efficient operation or the downhole pump.
Conventional motors available in the market place are 20 , not designed to withstand the high temperature - high pressure environment encountered in subterranean wells at depths in excess of 10,000 ft. Such motors must be able to drive pumps to supply well fluids as the activating ~luid for a down hole i well tool, such as an inflatable packer. Such motors must be 25 ! able to generate sufficient power to drive the pump means to produce a desired flow rate and overcome pressure differentials encountered in such well operations.
It is, accordingly, an object of this invention to provide an electric motor driven pumping unit preferably capa-ble of being inserted through a previously installed tubing ~ ~ ~
1 string which will function to efficiently pressurize well 1uids for the operation of a downhole tool, such as an inflat-able packer.
SUMMARY OF T~E INVENTION
In accordance with this invention motor means are employed, preferably in series, and are both mechanically and electrically connected in series. The energy requirements of the pump, in terms of both torque and speed, are matched by the mechanical output of the motor means yet at the same time, the ~otor means are freely insertable through the well, hence are of substantially smaller size than that which could be e~pected to produce the total torque required by the pump. Further~ore, the total current drawn through the electric wireline is mini-mized bv the electrical series connection.
Additionally, the motors are sealably mounted in axi-ally stacked relationship within a housing c~ntair.ing both the pump means and the motor means. The motors are surrounded by a clean fluid, such as kerosene or water, which is applied at the surface and which is maintained at well hydrostatic pressure by a compensating piston arrangement. A single mounting bracket supports the lowermost motor or the lower end of the motor, if only one is used, within the housing and the stators of the motors are keyed to each other to prevent stator rotation. A
~l heavy spring secures the stac~ in assembly.
25 ' Further objects and advantages of the invention will be readily apparent to those skilled in the art from the fol-lowing detailed description, taken in conjunction with the an-nexed sheets of drawings, on which is shown a preferred embodi-ment of the invention.
~ r~
1 BRIEF DESCRIPTION OF DRAWI~GS
.
Figs. lA, lB, lC and lD collectively constitute a vertical quarter sectional view of a combined motor and pump unit suitable for insertion through for example, a pre-existing tubing string to pump well fluids to a downhole tool, such as an infl~table pac'~er.
DESCRIPTION OF PREFERRED EMBODIMENT
Referring to the drawings, a downhole apparatus 1 embodying this invention-eomprises a housing assemblage 10 which is connec~ed in conventional fashion at its lower end to a well tool reauiring pressured fluid, such as an inflatable pac~er 2, (Fig. lD) which is only shown schematically since it is of entirely conventional construction.
Housing assemblage 10 comprises an upper sub 12 havins wireline connec_able means 12a for~ed on its upper end and de-fininc a relatively small internal bore 12b. U~per sub 12 is securea by threads l~c to a counterbored portion 14a of an up-per sleeve element 14. ~le threaded connection is sealed by O-rings 12d.
The medial portion 14b of the upper sleeve element 14 is provided with a radial port 14c which functions as a filling opening and communicates with the bore 14d of the upper sleeve portion. Additionally, immediately below the fill opening 14c, external threads 14e are provided which are connected to the top end of a coupling sleeve 16. Coupling sleeve 16 is provided with internal threads 16a at its lower end which threadably en-gage the upper end of an intermediate sleeve element 18 of hous-ing 10 and these threads are sealed by an O-ring 18a. The lower end of the intermediate sleeve element 18 of the housing 10 is provided with internal threads 18b which are engaged with 1 external threads provided on a coupling sub 20. Threads 18b are sealed by an O-ring 20a. The lower end of coupling sub 20 is provided with internal threads 20b which are secured to a bottom sleeve ele~ent 22 of the housing 10. Internal threads 22a in the botto~ of the lower housing sleeve 22 provide a connection to a we~1 tool requiring pressured fluid, such as the inflatable pac~er 2.
Re~erring to Fig. lC, a conventional wobble plate pump 30 is mounted within_the interior of housing 10 by a sup-port ring 21 which is mounted on the upper end of an internallyprojec-ing shoulder of the connecting sub 20. The wobble plate pu~p 30 is of conventional constrùction comprising a plurality of peripherally spaced, plunger type pumping units 32 which are successively activated by an inclined wobble plate 40a carried on the bottom end of a motor driven shaft 40 which extends upwardly in the housing 10 for connection to the drivino motors .. . . .
in a ~anner that will be hereinafter described. Rotation of shaft 40 effects the oDeration of the pumping plungers 32.
Well fluids are supplied to the inlet side of the 20 '~ pumping plungers 32 through a radial port 20c provided in the lower end of the connecting sub 20. Well fluids then pass ¦ through a cylindrical filtering sleeve or screen 36 which has its upper end mounted in a counterbore 20d ~ormed in the bottom end of connecting sub 20 and sealed thereto by an O-ring 20e.
The bottom end 36b of filter sleeve 36 is sealably mounted in a counterbore 22b in the top end of sleeve element 22 and sealed I by 0-ring 22c. The medial portion 36c is preforated or formed of a screen. The filtered well fluids then pass upwardly through an annular passage 25 defined between the exterior of a downwar.~ly projecting mandrel 24 and the internal ~ore surface 1 20f of the connecting sub 20. Mandrel 24 is provided at its upper end with external threads 24a for securement to the bot-to~ end of ~he pump 30. The well fluids then pass upwardly through a plurality of peripherally spaced, fluid passages 18c provided in the medial portion of the intermediate housing sleeve e;ement 1~ ~o where the fluids enter the pump unit 30 in conventional fashion. Fluids discharged from pump unit 30 pass downwardly through the bore 24a of the depending mandrel 24 and thus into the inlet end o~ the well tool 2 for which pressured fluid is required. 0-rings 24b and 24c prevent fluid leakage f-om the bore 24a of mandrel 24. ~11 or the apparatus hereto-fore described is entirely conventional, hence fur_her detailec description thereof is deemed unnecessary.
Near the upper end of the intermediate housing slee~e 18, internal threads 18d are provided whic~ ~oun. an annuLar seal and motor mounting brac~et 42. Brac~et 42 ;~as an lnter-nally projecting ledge cor.ion 42a on which a convent-onal thrust bearing unit 43 and face seal unit 44 is suppor~ed. The face seal 46 engages the top end of a ring 48 which is sealably mounted in the bore 42b of the bracket 42 by an O-ring 44a.
. . .
I The face seal 46 thus functions as a bottom end seal for a !j chamber 50 which extends upwardly through the remaining por-tions of connecting sleeve 16 and upper housing sleeve por-1l tion 14 to terminate by a conventional electric wireline con-25 l~ nector plug 52 sold under the trademark "Remlon". Connectorplug ~2 is sealably inserted in the upper end of the reduced diameter bore portion 14d of the upper housing portion 14.
Plug 52 is secured by internal threads 14g and sealed by an 0-ring 52a. The electric wire.portion 4 of an electric wire-line (not shown) extends upwardly to the well surface and down-~ r;i~
1 wardly to the top motor 60d. The entire chamber 50 may then be filled at the well surface with a clean lubricious fluid, such as kerosene, through the fill port 14c which is sealed by con-ventional chec~ valve 15.
Within the chamber 50, a plurality of substantially identical D.C. mators are moLnted in axially stac~ed relatiQn-ship and respectively designated in the illustrated embodiment as motors 60a, 60b, 60c and 60d. The lowermost motor 60a is connected to the top end of the pump driving shaft 40 by a con-ventional mechanical coupling 70, which is only shown schemati-cally. The bottom motor 60a is connec_ed to the nex' upper motor 60b by a conventional coupling 72 which is of the type that effects a mechanical connection. Connector 66d effects a series connec~ion of the electrical power supplied to the various motors. Similarily, mechanical couplings 72 are con-nectea be~een ~he mo~ors 6uo ana 6~c, and Delween ~olors 6uc and 60d.
It is, of course, necessary that the stator elements or outer housings 62a, 62b, 62c and 62d of the respective motors 20 il be secured against counter-rotating forces when the respective motor is energized. To effect such securement, the lowermost ¦I motor 62a is connected to a support ring 64 which in turn is se-cured against rotation by downwardly extending pins or keys 64a. The lowermost pins 64a engage appropriate slots or holes provided in the upper end of the motor mounting bracket 42.
Similar anti-rotation and supporting rings 66b are respectively provided between motor stators 62a, 62b, 62c and 62d. The only difference in the support rings 66b, and the lower support ring 64a is that the center portions of the upper rings 66D are pro-vided with annular internal recesses 66d. Pins 64a are employed ~ i2 1 to non-rotatively couple each of the motors through the sup-porting rings 64 and 66b.
A stac~ of Bellville spring washers 68 are provided to urge a force transmitting ring 69 downwardly against the stator portion 62d of the uppermost motor 60d. The Bellville springs 68 are upwardly a~utted by a spring anc;lor 17 whic;l~is secured to external threads 14h provided on the extreme lower portion 14k of the upper housing sleeve 14.
Those skilled un the art will understand that the aforedescribed mounting arrangement for a plurality of D.C.
motors within the limited confines the bore of the housing 10 provides a minimum of supporting structure for the stack of motors, yet insures that the stack is maintained in intimate mechanical contact.
The o eration of the aforedescribed pump will be readi~y apDaLent ~o tnose skiiie~ in tne ar~ ~rom tne loregoing description. As previously mentioned, the chamber 50 of the housing 10 is filLed with a clean lubricious fluid, such as ;, kerosene, at the well surface through the check valve 15 and 20 ~l the fill port 14c. This insures that the motors 50 are com-l¦ pletely isolated from contact with well fluids. It is, however, ¦ highly desirable that the chamber 50 containing the kerosene be ¦ maintained at a pressure substantially equal to the hydrostatic ¦ pressure of the well fluids surrounding the pump 1 so as to 25 I prevent any undesirable contraction of the housing assemblage 10. To provide this feature, a reduced diameter, downwardly depending portion 14k is formed on the upper housing sleeve 14.
This depending portion 14k cooperates with the inner wall 16c of the connecting sleeve 16 to define an annular fluid pressure chamber 45 within which an annular piston 57 is sealably mounted 1 by seals 57a. A radial port 16d is provided in the wall of the upper portion of the chamber 55 to expose the upper end of the piston 5? to the hydrostatic pressure of well fluids surround-ing the tool 1. The lower face of piston 57 is in communica-tion with the cha~ber 50 by virtue of axially extending fluidpassages 17b provided in the spring anchor 17. The piston 47 thus comprises a compensating piston and its position in the c~amber 50 will vary with the external hydrostatic well pres-sure, effectively transmitting such well pressure to the trapped ~erosene contained within chamber 50.
The selection of the plurality of motors depends, of course, u~on the input speed and toraue requirements of the wobble plate pump unit 30. The motors 60a, 60b, 60c and 60d which may have D.C. voltage characteristics, must be of re-stric~ed diameter in order to fit within the bore of the hous-ing asse~lase 10 wh ch, in tu--, m~s_ be carable 5f ~e3d-i passage through previously installed production tubing in the well or through casing. This diameter restriction means that conventional motors may have a limited torque output. For this reason, a plurality of such motors may be mechanically connected ', in series to multiply the torque outputs by a factor represent-ing the total number of motors employed. At the same time, the motors may be electrically connected in series so that the l applied voltage is distributed substantially equally across 25 1 each of the plurality of motors. This reduction in voltage effects a substantial reduction in speed of the output shaft of the motors, hence eliminates the need for speed reduction gearing which has heretofore been necessary for the successful utilization of the motors In restricted diameter, downhole applications. Of course, the invention is not limited to use 1 of motors insertable through production or other tubing, but, preferably such motors and pumps are anticipated to be used in such applications.
~n a preferred example of this invention, each of the D.C. motors have a normal applied D.C. voltage of 0-120 volts and at such voltage have a rated spe æ of rpm and develop a torque of 25 in. lbs.. In the utilization of such motors in a pump of a character heretofore described, and assuming the four of such motors are emplQy d, the applied voltage across each 10 motor is on the order of 0-120 volts, the output speed is 2,000 rpm and the total torque developed is 100 in. lbs.. These c~aracteristics closely match the desired torque and speed in~ut for the wobble type pu~p 30.
The motors may incorporate either a samarium cobolt magnet or a neodymium maqnet. The use of such magnets is be'ieved to corr;ibute substantia~ly t_ the energ~ available to drive the motors, defined as high inch pounds torque at a given rpm.
By use of the phrase "well fluids" herein it is 20 ~ intended to refer to those fluids which surround the well bore, ! either as naturally occurring fluids, and/or as components of il drilling, completion or workover fluids introduced into the ~! well for drilling, completion and/or workover applications.
jl Their various contents and applications are well known to those 25 , skilled in the art.
Although the invention has been described in terms of specified embodiments which are set forth in detail, it should be understood that this is by illustration only and that the invention is not necessarily limited thereto, since alternative embodi~ents and operating techniques will become apparent to t those skilled in the art in view of the disclosure. Accordingly, modifications are contemplated which can be made without depart-ing from the spirit of the described invention.
, 25 1 ' I, ll '
exam~le, U.S. patent ~2,681~706 to POTTORF and patent ~2,839,142 to dUBE~. While each of these patents disclose a motor and pump unit which is insertable into a well through a previously installed casing and operates to pump well fluids to expand an inflatable ?ac~er, these prior art references furnish no infor-mation as to the electrical and mechanical charac'eristics o the motor that are reauired to effect an efficient operation or the downhole pump.
Conventional motors available in the market place are 20 , not designed to withstand the high temperature - high pressure environment encountered in subterranean wells at depths in excess of 10,000 ft. Such motors must be able to drive pumps to supply well fluids as the activating ~luid for a down hole i well tool, such as an inflatable packer. Such motors must be 25 ! able to generate sufficient power to drive the pump means to produce a desired flow rate and overcome pressure differentials encountered in such well operations.
It is, accordingly, an object of this invention to provide an electric motor driven pumping unit preferably capa-ble of being inserted through a previously installed tubing ~ ~ ~
1 string which will function to efficiently pressurize well 1uids for the operation of a downhole tool, such as an inflat-able packer.
SUMMARY OF T~E INVENTION
In accordance with this invention motor means are employed, preferably in series, and are both mechanically and electrically connected in series. The energy requirements of the pump, in terms of both torque and speed, are matched by the mechanical output of the motor means yet at the same time, the ~otor means are freely insertable through the well, hence are of substantially smaller size than that which could be e~pected to produce the total torque required by the pump. Further~ore, the total current drawn through the electric wireline is mini-mized bv the electrical series connection.
Additionally, the motors are sealably mounted in axi-ally stacked relationship within a housing c~ntair.ing both the pump means and the motor means. The motors are surrounded by a clean fluid, such as kerosene or water, which is applied at the surface and which is maintained at well hydrostatic pressure by a compensating piston arrangement. A single mounting bracket supports the lowermost motor or the lower end of the motor, if only one is used, within the housing and the stators of the motors are keyed to each other to prevent stator rotation. A
~l heavy spring secures the stac~ in assembly.
25 ' Further objects and advantages of the invention will be readily apparent to those skilled in the art from the fol-lowing detailed description, taken in conjunction with the an-nexed sheets of drawings, on which is shown a preferred embodi-ment of the invention.
~ r~
1 BRIEF DESCRIPTION OF DRAWI~GS
.
Figs. lA, lB, lC and lD collectively constitute a vertical quarter sectional view of a combined motor and pump unit suitable for insertion through for example, a pre-existing tubing string to pump well fluids to a downhole tool, such as an infl~table pac'~er.
DESCRIPTION OF PREFERRED EMBODIMENT
Referring to the drawings, a downhole apparatus 1 embodying this invention-eomprises a housing assemblage 10 which is connec~ed in conventional fashion at its lower end to a well tool reauiring pressured fluid, such as an inflatable pac~er 2, (Fig. lD) which is only shown schematically since it is of entirely conventional construction.
Housing assemblage 10 comprises an upper sub 12 havins wireline connec_able means 12a for~ed on its upper end and de-fininc a relatively small internal bore 12b. U~per sub 12 is securea by threads l~c to a counterbored portion 14a of an up-per sleeve element 14. ~le threaded connection is sealed by O-rings 12d.
The medial portion 14b of the upper sleeve element 14 is provided with a radial port 14c which functions as a filling opening and communicates with the bore 14d of the upper sleeve portion. Additionally, immediately below the fill opening 14c, external threads 14e are provided which are connected to the top end of a coupling sleeve 16. Coupling sleeve 16 is provided with internal threads 16a at its lower end which threadably en-gage the upper end of an intermediate sleeve element 18 of hous-ing 10 and these threads are sealed by an O-ring 18a. The lower end of the intermediate sleeve element 18 of the housing 10 is provided with internal threads 18b which are engaged with 1 external threads provided on a coupling sub 20. Threads 18b are sealed by an O-ring 20a. The lower end of coupling sub 20 is provided with internal threads 20b which are secured to a bottom sleeve ele~ent 22 of the housing 10. Internal threads 22a in the botto~ of the lower housing sleeve 22 provide a connection to a we~1 tool requiring pressured fluid, such as the inflatable pac~er 2.
Re~erring to Fig. lC, a conventional wobble plate pump 30 is mounted within_the interior of housing 10 by a sup-port ring 21 which is mounted on the upper end of an internallyprojec-ing shoulder of the connecting sub 20. The wobble plate pu~p 30 is of conventional constrùction comprising a plurality of peripherally spaced, plunger type pumping units 32 which are successively activated by an inclined wobble plate 40a carried on the bottom end of a motor driven shaft 40 which extends upwardly in the housing 10 for connection to the drivino motors .. . . .
in a ~anner that will be hereinafter described. Rotation of shaft 40 effects the oDeration of the pumping plungers 32.
Well fluids are supplied to the inlet side of the 20 '~ pumping plungers 32 through a radial port 20c provided in the lower end of the connecting sub 20. Well fluids then pass ¦ through a cylindrical filtering sleeve or screen 36 which has its upper end mounted in a counterbore 20d ~ormed in the bottom end of connecting sub 20 and sealed thereto by an O-ring 20e.
The bottom end 36b of filter sleeve 36 is sealably mounted in a counterbore 22b in the top end of sleeve element 22 and sealed I by 0-ring 22c. The medial portion 36c is preforated or formed of a screen. The filtered well fluids then pass upwardly through an annular passage 25 defined between the exterior of a downwar.~ly projecting mandrel 24 and the internal ~ore surface 1 20f of the connecting sub 20. Mandrel 24 is provided at its upper end with external threads 24a for securement to the bot-to~ end of ~he pump 30. The well fluids then pass upwardly through a plurality of peripherally spaced, fluid passages 18c provided in the medial portion of the intermediate housing sleeve e;ement 1~ ~o where the fluids enter the pump unit 30 in conventional fashion. Fluids discharged from pump unit 30 pass downwardly through the bore 24a of the depending mandrel 24 and thus into the inlet end o~ the well tool 2 for which pressured fluid is required. 0-rings 24b and 24c prevent fluid leakage f-om the bore 24a of mandrel 24. ~11 or the apparatus hereto-fore described is entirely conventional, hence fur_her detailec description thereof is deemed unnecessary.
Near the upper end of the intermediate housing slee~e 18, internal threads 18d are provided whic~ ~oun. an annuLar seal and motor mounting brac~et 42. Brac~et 42 ;~as an lnter-nally projecting ledge cor.ion 42a on which a convent-onal thrust bearing unit 43 and face seal unit 44 is suppor~ed. The face seal 46 engages the top end of a ring 48 which is sealably mounted in the bore 42b of the bracket 42 by an O-ring 44a.
. . .
I The face seal 46 thus functions as a bottom end seal for a !j chamber 50 which extends upwardly through the remaining por-tions of connecting sleeve 16 and upper housing sleeve por-1l tion 14 to terminate by a conventional electric wireline con-25 l~ nector plug 52 sold under the trademark "Remlon". Connectorplug ~2 is sealably inserted in the upper end of the reduced diameter bore portion 14d of the upper housing portion 14.
Plug 52 is secured by internal threads 14g and sealed by an 0-ring 52a. The electric wire.portion 4 of an electric wire-line (not shown) extends upwardly to the well surface and down-~ r;i~
1 wardly to the top motor 60d. The entire chamber 50 may then be filled at the well surface with a clean lubricious fluid, such as kerosene, through the fill port 14c which is sealed by con-ventional chec~ valve 15.
Within the chamber 50, a plurality of substantially identical D.C. mators are moLnted in axially stac~ed relatiQn-ship and respectively designated in the illustrated embodiment as motors 60a, 60b, 60c and 60d. The lowermost motor 60a is connected to the top end of the pump driving shaft 40 by a con-ventional mechanical coupling 70, which is only shown schemati-cally. The bottom motor 60a is connec_ed to the nex' upper motor 60b by a conventional coupling 72 which is of the type that effects a mechanical connection. Connector 66d effects a series connec~ion of the electrical power supplied to the various motors. Similarily, mechanical couplings 72 are con-nectea be~een ~he mo~ors 6uo ana 6~c, and Delween ~olors 6uc and 60d.
It is, of course, necessary that the stator elements or outer housings 62a, 62b, 62c and 62d of the respective motors 20 il be secured against counter-rotating forces when the respective motor is energized. To effect such securement, the lowermost ¦I motor 62a is connected to a support ring 64 which in turn is se-cured against rotation by downwardly extending pins or keys 64a. The lowermost pins 64a engage appropriate slots or holes provided in the upper end of the motor mounting bracket 42.
Similar anti-rotation and supporting rings 66b are respectively provided between motor stators 62a, 62b, 62c and 62d. The only difference in the support rings 66b, and the lower support ring 64a is that the center portions of the upper rings 66D are pro-vided with annular internal recesses 66d. Pins 64a are employed ~ i2 1 to non-rotatively couple each of the motors through the sup-porting rings 64 and 66b.
A stac~ of Bellville spring washers 68 are provided to urge a force transmitting ring 69 downwardly against the stator portion 62d of the uppermost motor 60d. The Bellville springs 68 are upwardly a~utted by a spring anc;lor 17 whic;l~is secured to external threads 14h provided on the extreme lower portion 14k of the upper housing sleeve 14.
Those skilled un the art will understand that the aforedescribed mounting arrangement for a plurality of D.C.
motors within the limited confines the bore of the housing 10 provides a minimum of supporting structure for the stack of motors, yet insures that the stack is maintained in intimate mechanical contact.
The o eration of the aforedescribed pump will be readi~y apDaLent ~o tnose skiiie~ in tne ar~ ~rom tne loregoing description. As previously mentioned, the chamber 50 of the housing 10 is filLed with a clean lubricious fluid, such as ;, kerosene, at the well surface through the check valve 15 and 20 ~l the fill port 14c. This insures that the motors 50 are com-l¦ pletely isolated from contact with well fluids. It is, however, ¦ highly desirable that the chamber 50 containing the kerosene be ¦ maintained at a pressure substantially equal to the hydrostatic ¦ pressure of the well fluids surrounding the pump 1 so as to 25 I prevent any undesirable contraction of the housing assemblage 10. To provide this feature, a reduced diameter, downwardly depending portion 14k is formed on the upper housing sleeve 14.
This depending portion 14k cooperates with the inner wall 16c of the connecting sleeve 16 to define an annular fluid pressure chamber 45 within which an annular piston 57 is sealably mounted 1 by seals 57a. A radial port 16d is provided in the wall of the upper portion of the chamber 55 to expose the upper end of the piston 5? to the hydrostatic pressure of well fluids surround-ing the tool 1. The lower face of piston 57 is in communica-tion with the cha~ber 50 by virtue of axially extending fluidpassages 17b provided in the spring anchor 17. The piston 47 thus comprises a compensating piston and its position in the c~amber 50 will vary with the external hydrostatic well pres-sure, effectively transmitting such well pressure to the trapped ~erosene contained within chamber 50.
The selection of the plurality of motors depends, of course, u~on the input speed and toraue requirements of the wobble plate pump unit 30. The motors 60a, 60b, 60c and 60d which may have D.C. voltage characteristics, must be of re-stric~ed diameter in order to fit within the bore of the hous-ing asse~lase 10 wh ch, in tu--, m~s_ be carable 5f ~e3d-i passage through previously installed production tubing in the well or through casing. This diameter restriction means that conventional motors may have a limited torque output. For this reason, a plurality of such motors may be mechanically connected ', in series to multiply the torque outputs by a factor represent-ing the total number of motors employed. At the same time, the motors may be electrically connected in series so that the l applied voltage is distributed substantially equally across 25 1 each of the plurality of motors. This reduction in voltage effects a substantial reduction in speed of the output shaft of the motors, hence eliminates the need for speed reduction gearing which has heretofore been necessary for the successful utilization of the motors In restricted diameter, downhole applications. Of course, the invention is not limited to use 1 of motors insertable through production or other tubing, but, preferably such motors and pumps are anticipated to be used in such applications.
~n a preferred example of this invention, each of the D.C. motors have a normal applied D.C. voltage of 0-120 volts and at such voltage have a rated spe æ of rpm and develop a torque of 25 in. lbs.. In the utilization of such motors in a pump of a character heretofore described, and assuming the four of such motors are emplQy d, the applied voltage across each 10 motor is on the order of 0-120 volts, the output speed is 2,000 rpm and the total torque developed is 100 in. lbs.. These c~aracteristics closely match the desired torque and speed in~ut for the wobble type pu~p 30.
The motors may incorporate either a samarium cobolt magnet or a neodymium maqnet. The use of such magnets is be'ieved to corr;ibute substantia~ly t_ the energ~ available to drive the motors, defined as high inch pounds torque at a given rpm.
By use of the phrase "well fluids" herein it is 20 ~ intended to refer to those fluids which surround the well bore, ! either as naturally occurring fluids, and/or as components of il drilling, completion or workover fluids introduced into the ~! well for drilling, completion and/or workover applications.
jl Their various contents and applications are well known to those 25 , skilled in the art.
Although the invention has been described in terms of specified embodiments which are set forth in detail, it should be understood that this is by illustration only and that the invention is not necessarily limited thereto, since alternative embodi~ents and operating techniques will become apparent to t those skilled in the art in view of the disclosure. Accordingly, modifications are contemplated which can be made without depart-ing from the spirit of the described invention.
, 25 1 ' I, ll '
Claims (22)
1. Apparatus (1) for pressurizing downhole well fluids in a subterranean well to effect activation of a downhole well tool, (2) comprising:
a tubular housing (10) insertable through a tubular conduit positionable within said well;
electric motor means (60a, 60b, 60c, 60d) mounted in said housing;
pump means (30) driven by said electric motor means and sealably mounted within said housing;
means defining inlet (20c, 25, 18c) and out-let (24a) passages communicating relative to said pump means characterized in that said inlet supplies well fluids to said pump means and said outlet passage supplies pressurized well fluids to said well tool; and electric wireline means (4) for suspending said housing and supplying a voltage measurement across said electric motor means to produce a speed-torque relationship matching the desired mechanical input for said pump means.
a tubular housing (10) insertable through a tubular conduit positionable within said well;
electric motor means (60a, 60b, 60c, 60d) mounted in said housing;
pump means (30) driven by said electric motor means and sealably mounted within said housing;
means defining inlet (20c, 25, 18c) and out-let (24a) passages communicating relative to said pump means characterized in that said inlet supplies well fluids to said pump means and said outlet passage supplies pressurized well fluids to said well tool; and electric wireline means (4) for suspending said housing and supplying a voltage measurement across said electric motor means to produce a speed-torque relationship matching the desired mechanical input for said pump means.
2. The apparatus of Claim 1 wherein the electric motor means are in series relationship, there being N such motor means where N is a number greater than 1, and wherein the voltage is applied to each motor means and drives said pump means at the desired speed and develops 1/N portion of the desired torque.
3. The apparatus of Claim 1 wherein the voltage applied to the motor means is from between about 1 to about 100 volts; the rotational speed of said motor means is approximately 3600 rpm, and the torque generated by said motor means is approximately 25 in. lbs.
4. The apparatus of Claim 1 wherein the electric motor means comprise a samarium cobalt magnet.
5. The apparatus of Claim 1 wherein the electric motor means comprises a neodymium cobalt magnet.
6. Apparatus for setting an inflatable packer within a subterranean well, comprising:
a tubular housing insertable through a tubular conduit disposable within said subterranean well;
means for pressurizing downhole well fluids for inflating said packer means and including electric motor means mounted in said housing and pump means driven by said motor means, the pump means being sealably mounted in said housing;
means defining inlet and outlet passages for said pump means characterized in that said inlet passage supplying well fluids to said pump means and said outlet passage supplying pressurized well fluids to the inflatable packer; and electric wireline means for suspending said housing and supplying a voltage across said motor means to produce a speed-torque relationship matching the desired mechanical input for said pump means.
a tubular housing insertable through a tubular conduit disposable within said subterranean well;
means for pressurizing downhole well fluids for inflating said packer means and including electric motor means mounted in said housing and pump means driven by said motor means, the pump means being sealably mounted in said housing;
means defining inlet and outlet passages for said pump means characterized in that said inlet passage supplying well fluids to said pump means and said outlet passage supplying pressurized well fluids to the inflatable packer; and electric wireline means for suspending said housing and supplying a voltage across said motor means to produce a speed-torque relationship matching the desired mechanical input for said pump means.
7. The apparatus of Claim 6 wherein the electric motor means are in series relationship, there being N such motor means where N is a number greater than 1, and wherein the voltage is applied to each motor means and drives said pump means at the desired speed and develops 1/N portion of the desired torque.
8. The apparatus of Claim 6 wherein the voltage applied to the motor means is from between about 1 to about 100 volts; the rotational speed of said motor means is approximately 3600 rpm; and the torque generated by said motor means is approximately 25 in. lbs.
9. The apparatus of Claim 6 wherein the electric motor means comprise a samarium cobalt magnet.
10. The apparatus of Claim 6 wherein the electric motor means comprises a neodymium cobalt magnet.
11. Apparatus for pressurizing downhole well fluids for inflation of an inflatable packer within a subterranean well, comprising:
a tubular housing insertable within said well;
electric motor means mounted in said housing;
pump means driven by said motors for establishing and maintaining a differential pressure source to drive said inflatable packer into inflated condition within said subterranean well, said pump means being sealably mounted in said housing;
means defining inlet and outlet passages for said pump means characterized in that said inlet passage supplying well fluids to said pump means and said outlet passage supplying pressurized well fluids to said inflatable packer; and electric wireline means for suspending said housing and supplying a voltage across said motor means to produce a speed-torque relationship matching the desired mechanical input for said pump means.
a tubular housing insertable within said well;
electric motor means mounted in said housing;
pump means driven by said motors for establishing and maintaining a differential pressure source to drive said inflatable packer into inflated condition within said subterranean well, said pump means being sealably mounted in said housing;
means defining inlet and outlet passages for said pump means characterized in that said inlet passage supplying well fluids to said pump means and said outlet passage supplying pressurized well fluids to said inflatable packer; and electric wireline means for suspending said housing and supplying a voltage across said motor means to produce a speed-torque relationship matching the desired mechanical input for said pump means.
12. The apparatus of Claim 11 wherein the electric motor means are in series relationship, there being N
such motor means where N is a number greater than 1, and wherein the voltage is applied to each motor means and drives said pump means at the desired speed and develops l/N portion of the desired torque.
such motor means where N is a number greater than 1, and wherein the voltage is applied to each motor means and drives said pump means at the desired speed and develops l/N portion of the desired torque.
13. The apparatus of Claim 11 wherein the voltage applied to the motor means is from between about 1 to about 100 volts; the rotational speed of said motor means is approximately 3600 rpm, and the torque generated by said motor means is approximately 25 in. lbs.
14. The apparatus of Claim 11 wherein the electric motor means comprise a samarium cobalt magnet.
15. The apparatus of Claim 11 wherein the electric motor means comprises a neodymium cobalt magnet.
16. Apparatus for pressurizing downhole well fluids in a subterranean well having a previously installed tubing string extending from the well surface to the well fluids comprising:
a tubular housing insertable through said tubing string;
a plurality of motor means mounted in said housing in axially stacked relationship;
means for mechanically and electrically connecting said motor means in series relationship, there being N such motors where N is a number greater than 1;
pump means driven by said motor means;
the pump means being sealably mounted in said housing;
means defining inlet and outlet passages for said pump means, characterized in that said inlet passage supplies well fluids to said pump means and said outlet passage supplies pressurized well fluids to a downhole tool;
means in said housing defining a sealed chamber (50) surrounding said motor means;
valve means (15) for filling said chamber at the surface with a clean lubricious fluid;
fluid pressure transfer means (14k, 16c, 16, 45) disposed in a portion of said chamber intermediate said clean lubricious fluid and the well fluid surrounding said housing to equalize the fluid pressure in said chamber with the well hydrostatic pressure at any position of said housing: and electric wireline means for suspending said housing and supplying a voltage to said motor means selected to produce a speed-torque relationship for the N motors to matching the desired mechanical input for said pump whereby a predeterminable flow rate and pressure within said fluid pressure transfer means may be transmitted to said downhole tool for activation of said downhole tool.
a tubular housing insertable through said tubing string;
a plurality of motor means mounted in said housing in axially stacked relationship;
means for mechanically and electrically connecting said motor means in series relationship, there being N such motors where N is a number greater than 1;
pump means driven by said motor means;
the pump means being sealably mounted in said housing;
means defining inlet and outlet passages for said pump means, characterized in that said inlet passage supplies well fluids to said pump means and said outlet passage supplies pressurized well fluids to a downhole tool;
means in said housing defining a sealed chamber (50) surrounding said motor means;
valve means (15) for filling said chamber at the surface with a clean lubricious fluid;
fluid pressure transfer means (14k, 16c, 16, 45) disposed in a portion of said chamber intermediate said clean lubricious fluid and the well fluid surrounding said housing to equalize the fluid pressure in said chamber with the well hydrostatic pressure at any position of said housing: and electric wireline means for suspending said housing and supplying a voltage to said motor means selected to produce a speed-torque relationship for the N motors to matching the desired mechanical input for said pump whereby a predeterminable flow rate and pressure within said fluid pressure transfer means may be transmitted to said downhole tool for activation of said downhole tool.
17. The apparatus of Claim 16 wherein said fluid pressure transfer means comprises a cylinder having one axial end communicating with said chamber and another axial end communicating with the exterior of said housing; and compensating piston means slidably and sealably mounted relative to said cylinder.
18. The apparatus of Claim 16 wherein said voltage applied to the motor means drive the pump means at the desired speed and develops a portion of the desired torque relative to each of said motor means.
19. Apparatus for pressurizing downhole well fluids in a subterranean well, comprising:
a tubular housing;
motor means mounted in said housing;
pump means driven by said motor means and sealably mounted within said housing;
means defining inlet and outlet passages for said pump means, characterized in that said inlet passage supplies well fluids to said pump means and said outlet passage supplies pressurized well fluids to a downhole tool for activation of said downhole tool;
means in said housing defining a sealed chamber surrounding said motor means;
valve means for filling said chamber at the surface with a clean lubricious fluid;
fluid pressure transfer means disposed in a portion of said chamber intermediate said clean lubricious fluid and the well fluid surrounding said housing to equalize the fluid pressure in said chamber with the well hydrostatic pressure at any portion of said housing to produce a desired flow rate and pressure for said fluid within said fluid pressure transfer means for activation of said downhole tool; and electric wireline means for suspending said housing and supplying a voltage to said motor means to produce a speed-torque relationship for the motor means matching the desired mechanical input for said pump means.
a tubular housing;
motor means mounted in said housing;
pump means driven by said motor means and sealably mounted within said housing;
means defining inlet and outlet passages for said pump means, characterized in that said inlet passage supplies well fluids to said pump means and said outlet passage supplies pressurized well fluids to a downhole tool for activation of said downhole tool;
means in said housing defining a sealed chamber surrounding said motor means;
valve means for filling said chamber at the surface with a clean lubricious fluid;
fluid pressure transfer means disposed in a portion of said chamber intermediate said clean lubricious fluid and the well fluid surrounding said housing to equalize the fluid pressure in said chamber with the well hydrostatic pressure at any portion of said housing to produce a desired flow rate and pressure for said fluid within said fluid pressure transfer means for activation of said downhole tool; and electric wireline means for suspending said housing and supplying a voltage to said motor means to produce a speed-torque relationship for the motor means matching the desired mechanical input for said pump means.
20. The apparatus of Claim 19 wherein said motor means incorporates a samarium cobalt magnet.
21. The apparatus of Claim 19 wherein said motor means incorporates a neodymium cobalt magnet.
22. Method for activating an inflatable packer means within a subterranean well, comprising the steps of:
(1) assembling at the top of the well a pressurizing apparatus, comprising:
a tubular housing insertable through a tubular conduit positionable within said well;
electric motor means mounted in said housing;
pump means driven by said electric motor means and sealably mounted within said housing;
means defining inlet and outlet passages communicating relative to said pump means characterized in that said inlet passage supplies well fluids to said pump means and said outlet passage supplies pressurized well fluids to said well tool; and an inflatable packer means;
(2) suspending said apparatus on an electric wireline means:
(3) positioning said apparatus on said wireline means within said well at a predeterminable location;
(4) introducing a voltage through said wireline means to said apparatus to produce a speed-torque relationship matching the desired mechanical input for said pump means, whereby well fluids are introduced into said inlet passage, through said pump means and to the outlet passage for pressurizing the well fluids to equalize the fluid pressure within said apparatus with the well hydrostatic pressure within the housing and to activate said downhole tool.
(1) assembling at the top of the well a pressurizing apparatus, comprising:
a tubular housing insertable through a tubular conduit positionable within said well;
electric motor means mounted in said housing;
pump means driven by said electric motor means and sealably mounted within said housing;
means defining inlet and outlet passages communicating relative to said pump means characterized in that said inlet passage supplies well fluids to said pump means and said outlet passage supplies pressurized well fluids to said well tool; and an inflatable packer means;
(2) suspending said apparatus on an electric wireline means:
(3) positioning said apparatus on said wireline means within said well at a predeterminable location;
(4) introducing a voltage through said wireline means to said apparatus to produce a speed-torque relationship matching the desired mechanical input for said pump means, whereby well fluids are introduced into said inlet passage, through said pump means and to the outlet passage for pressurizing the well fluids to equalize the fluid pressure within said apparatus with the well hydrostatic pressure within the housing and to activate said downhole tool.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US34534289A | 1989-04-28 | 1989-04-28 | |
| US345,342 | 1989-04-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2008152A1 true CA2008152A1 (en) | 1990-10-28 |
Family
ID=23354662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2008152 Abandoned CA2008152A1 (en) | 1989-04-28 | 1990-01-19 | Downhole pump |
Country Status (5)
| Country | Link |
|---|---|
| AU (1) | AU634755B2 (en) |
| BR (1) | BR9001974A (en) |
| CA (1) | CA2008152A1 (en) |
| GB (1) | GB2230800A (en) |
| NO (1) | NO900779L (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5417289A (en) * | 1993-12-30 | 1995-05-23 | Carisella; James V. | Inflatable packer device including limited initial travel means and method |
| US5469919A (en) * | 1993-12-30 | 1995-11-28 | Carisella; James V. | Programmed shape inflatable packer device and method |
| US5495892A (en) * | 1993-12-30 | 1996-03-05 | Carisella; James V. | Inflatable packer device and method |
| US8424596B2 (en) | 2009-11-03 | 2013-04-23 | Robert Douglas Bebb | High efficiency fluid pumping apparatus and method |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8827320D0 (en) * | 1988-11-23 | 1988-12-29 | Shell Int Research | Process for polymerization of structurally different monomers |
| DE69226903T2 (en) * | 1991-06-14 | 1999-04-15 | Baker-Hughes Inc., Houston, Tex. | Pressurized downhole tool system |
| US6367545B1 (en) | 1999-03-05 | 2002-04-09 | Baker Hughes Incorporated | Electronically controlled electric wireline setting tool |
| US8955606B2 (en) | 2011-06-03 | 2015-02-17 | Baker Hughes Incorporated | Sealing devices for sealing inner wall surfaces of a wellbore and methods of installing same in a wellbore |
| US8905149B2 (en) | 2011-06-08 | 2014-12-09 | Baker Hughes Incorporated | Expandable seal with conforming ribs |
| US8839874B2 (en) | 2012-05-15 | 2014-09-23 | Baker Hughes Incorporated | Packing element backup system |
| US9243490B2 (en) | 2012-12-19 | 2016-01-26 | Baker Hughes Incorporated | Electronically set and retrievable isolation devices for wellbores and methods thereof |
| US9273526B2 (en) | 2013-01-16 | 2016-03-01 | Baker Hughes Incorporated | Downhole anchoring systems and methods of using same |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2681706A (en) * | 1949-12-30 | 1954-06-22 | Stanolind Oil & Gas Co | Inflatable well packer |
| US2839142A (en) * | 1954-05-05 | 1958-06-17 | Exxon Research Engineering Co | Permanent well completion method |
| US3447605A (en) * | 1967-09-05 | 1969-06-03 | Mineralimpex Magyar Olaj Es Ba | Method of sealing boreholes and apparatus therefor |
| US4345648A (en) * | 1980-02-11 | 1982-08-24 | Bj-Hughes, Inc. | Inflatable packer system |
-
1990
- 1990-01-19 CA CA 2008152 patent/CA2008152A1/en not_active Abandoned
- 1990-02-01 GB GB9002253A patent/GB2230800A/en not_active Withdrawn
- 1990-02-19 NO NO90900779A patent/NO900779L/en unknown
- 1990-02-28 AU AU50543/90A patent/AU634755B2/en not_active Expired
- 1990-04-27 BR BR9001974A patent/BR9001974A/en unknown
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5417289A (en) * | 1993-12-30 | 1995-05-23 | Carisella; James V. | Inflatable packer device including limited initial travel means and method |
| US5469919A (en) * | 1993-12-30 | 1995-11-28 | Carisella; James V. | Programmed shape inflatable packer device and method |
| US5495892A (en) * | 1993-12-30 | 1996-03-05 | Carisella; James V. | Inflatable packer device and method |
| US5564504A (en) * | 1993-12-30 | 1996-10-15 | Carisella; James V. | Programmed shape inflatable packer device and method |
| US5813459A (en) * | 1993-12-30 | 1998-09-29 | Carisella; James V. | Programmed shape inflatable packer device |
| US8424596B2 (en) | 2009-11-03 | 2013-04-23 | Robert Douglas Bebb | High efficiency fluid pumping apparatus and method |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2230800A (en) | 1990-10-31 |
| NO900779D0 (en) | 1990-02-19 |
| BR9001974A (en) | 1991-07-30 |
| NO900779L (en) | 1990-10-29 |
| AU5054390A (en) | 1990-11-01 |
| GB9002253D0 (en) | 1990-03-28 |
| AU634755B2 (en) | 1993-03-04 |
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| EEER | Examination request | ||
| FZDE | Dead |