US20140048246A1 - Reverse Rotation Protection For Borehole Pumps - Google Patents

Reverse Rotation Protection For Borehole Pumps Download PDF

Info

Publication number
US20140048246A1
US20140048246A1 US14/063,871 US201314063871A US2014048246A1 US 20140048246 A1 US20140048246 A1 US 20140048246A1 US 201314063871 A US201314063871 A US 201314063871A US 2014048246 A1 US2014048246 A1 US 2014048246A1
Authority
US
United States
Prior art keywords
reverse rotation
rotation protection
protection according
contact elements
polished rod
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
Application number
US14/063,871
Inventor
Angelo Cemin
Jochen Dittrich
Alexander Zuber
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.)
Netzsch Pumpen and Systeme GmbH
Original Assignee
Netzsch Pumpen and Systeme GmbH
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
Application filed by Netzsch Pumpen and Systeme GmbH filed Critical Netzsch Pumpen and Systeme GmbH
Assigned to NETZSCH PUMPEN & SYSTEME GMBH reassignment NETZSCH PUMPEN & SYSTEME GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ZUBER, ALEXANDER, CEMIN, ANGELO, DITTRICH, JOCHEN
Publication of US20140048246A1 publication Critical patent/US20140048246A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/12—Rope clamps ; Rod, casings or tube clamps not secured to elevators
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
    • E21B43/121—Lifting well fluids
    • E21B43/126—Adaptations of down-hole pump systems powered by drives outside the borehole, e.g. by a rotary or oscillating drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/10—Outer members for co-operation with rotary pistons; Casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/28—Safety arrangements; Monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
    • F04C13/008—Pumps for submersible use, i.e. down-hole pumping

Definitions

  • the present invention relates to a reverse rotation protection for borehole pumps.
  • Canadian patent CA 2 331 915 C discloses a device and a method for securing and holding a linkage in a borehole.
  • the device is disposed beneath the skirt and above the borehole.
  • the four holding elements for the linkage are disposed with an offset of 90°, so that each holding element holds the linkage from one side.
  • the holding elements each comprise a clamping jaw and a screw, with which the clamping jaws are pressed against the linkage. When the clamping jaws lie adjacent to the linkage, a gap is present in each case between the individual clamping jaws.
  • Canadian patent CA 2 349 988 C describes a device for holding and fixing a polished rod in oil delivery pumps.
  • the device is incorporated into the drive train of the crude oil pump and is connected to the latter by means of two flanges.
  • two clamping jaws are pressed against the polished rod by means of threaded bolts.
  • the clamping jaws are held apart from one another by springs and pressed against the inner wall of the device.
  • a sleeve for guiding the polished rod is inserted into the lower region of the device.
  • the problem underlying the invention is to create a reverse rotation protection with which the drive train of a borehole pump can be secured against rotational movements when not in operation.
  • a reverse rotation protection for borehole pumps is disclosed, wherein the reverse rotation protection according to the invention is disposed in a drive head.
  • the reverse rotation protection comprises a housing and a clamping tool for securing a polished rod.
  • the clamping tool comprises at least two exchangeable contact elements with which the polishing rod can be fixed releasably.
  • the contact elements are each introduced releasably into a holding fixture. Each contact element is connected to the holding fixture by means of at least one screw.
  • the contact elements are produced from a non-sparking and pressure-resistant material.
  • the contact elements are preferably produced from bronze, brass or copper.
  • the clamping tool can be adapted to different polished rods with different diameters by means of contact elements differing in size.
  • the contact elements with different internal diameters can be inserted into the holding fixtures of the clamping tool, so that different contact elements can be selected depending on the diameter of the various polished rods. It is clear to a person skilled in the art that, by means of different contact elements, the clamping tool can be adapted to polished rods which have changed their diameter during the operation of the borehole pump.
  • the side of the holding fixture lying opposite the contact element is provided with a groove for receiving a setscrew.
  • the holding fixtures are movable inside the housing by means of the setscrews.
  • Each setscrew is provided with a cap on the side facing away from the holding fixture.
  • the caps are fitted on the setscrews when the contact elements are not in contact with the polished rod. It is thus possible to see that the borehole pump is ready for start-up.
  • the setscrews are screwed into the housing of the reverse rotation protection to an extent such that fitting of the caps on the setscrews is not possible.
  • a further advantage of this approach is that the threads of the setscrews are protected by the caps against dirt and adverse weather effects during normal operation.
  • the caps are provided with contacts which display the relaxation state of the reverse rotation protection. Furthermore, the caps are in contact, in each case via a connecting cable, with a control which prevents the borehole pump from starting up in the absence of a signal. This thus ensures that the borehole pump can only be started up when the contact elements are released from the polished rod and the latter is thus not blocked.
  • various process steps play a not inconsiderable role in protecting a borehole pump against undesired rotation of the drive train through reverse rotation.
  • the contact elements are pressed against the polished rod, held against the polished rod and removed from the polished rod by means of actuating units.
  • setscrews or hydraulic actuating elements are used as actuating units.
  • FIG. 1 shows the position of the reverse rotation protection in the drive head.
  • FIG. 2 shows in detail the reverse rotation protection according to the invention.
  • FIG. 3 shows a perspective view of the reverse rotation protection.
  • FIG. 4 shows a reverse rotation protection with electronic start-up protection.
  • FIG. 5 shows in detail the protection system of a reverse rotation protection.
  • FIG. 1 shows the position of reverse rotation protection 20 in drive head 10 .
  • Reverse rotation protection 20 is disposed in the upper region of skirt 14 .
  • Polished rod 12 runs through reverse rotation protection 20 , as well as through drive head 10 .
  • Motor 18 is fitted on drive head 10 by means of bracket 16 .
  • FIG. 2 shows in detail reverse rotation protection 20 according to the invention.
  • Reverse rotation protection 20 comprises a housing 22 .
  • Clamping tool 24 for securing polished rod 12 is located in the interior of housing 22 .
  • clamping tool 24 comprises two holding fixtures 28 , into which contact elements 26 are introduced.
  • Contact elements 26 represent the connection between reverse rotation protection 20 and polished rod 12 .
  • Contact elements 26 are connected to holding fixtures 28 in a releasable manner by means of screws 30 .
  • Grooves 32 in which setscrews 34 engage, are provided in the sides of holding fixtures 28 lying opposite contact elements 26 .
  • Contact elements 26 are pressed against polished rod 12 or released from the latter by means of these setscrews 34 .
  • Caps 36 are disposed at the outer ends of setscrews 34 . These caps 36 are fitted onto setscrews 34 when contact elements 26 are no longer in contact with polished rod 12 as a result of setscrews 34 being slackened off.
  • FIG. 3 shows a perspective view of reverse rotation protection 20 .
  • Holding fixtures 28 are introduced into housing 22 .
  • Contact elements 26 which are fixed releasably in holding fixtures 28 by means of screws 30 , can be seen in the interior of holding fixtures 28 .
  • grooves 32 in which the setscrews (not represented) engage.
  • Caps 36 can be seen at the outer side of housing 22 , said caps covering setscrews 34 after removal of contact elements 26 from the polished rod (not represented).
  • Caps 36 are connected to housing 22 by means of retention elements 37 in such a way that they cannot be lost when not in use.
  • FIG. 4 shows a reverse rotation protection 20 with an electronic start-up protection.
  • caps 36 are provided with contacts 38 , which are connected by connecting cables 42 to a control 40 .
  • control 40 like caps 36 too, is fitted to housing 22 of reverse rotation protection 20 .
  • FIG. 5 shows in detail the protection system of reverse rotation protection 20 according to the invention.
  • Setscrews 34 are disposed laterally in housing 22 of reverse rotation protection 20 .
  • the position of holding fixtures 28 and therefore contact elements 26 is changed with these setscrews 34 .
  • contact elements 26 have been removed from the polished rod (not represented)
  • setscrews 34 project beyond the housing part. If caps 36 are screwed onto setscrews 34 , a connection is created between the heads of setscrews 34 and contacts 38 . An electrical circuit is closed by this connection, which makes it possible to start the drive of the borehole pump.

Abstract

A reverse rotation protection for borehole pumps is disposed in a drive head. The reverse rotation protection includes a housing and a clamping tool for securing a polished rod. The clamping tool includes at least two exchangeable contact elements with which the polished rod can be fixed releasably.

Description

    FIELD OF THE INVENTION
  • The present invention relates to a reverse rotation protection for borehole pumps.
    • BACKGROUND OF THE INVENTION
  • Canadian patent CA 2 331 915 C discloses a device and a method for securing and holding a linkage in a borehole. The device is disposed beneath the skirt and above the borehole. The four holding elements for the linkage are disposed with an offset of 90°, so that each holding element holds the linkage from one side. The holding elements each comprise a clamping jaw and a screw, with which the clamping jaws are pressed against the linkage. When the clamping jaws lie adjacent to the linkage, a gap is present in each case between the individual clamping jaws.
  • Canadian patent CA 2 349 988 C describes a device for holding and fixing a polished rod in oil delivery pumps. The device is incorporated into the drive train of the crude oil pump and is connected to the latter by means of two flanges. For the fixing of the polished rod, two clamping jaws are pressed against the polished rod by means of threaded bolts. In the normal, non-clamped state, the clamping jaws are held apart from one another by springs and pressed against the inner wall of the device. A sleeve for guiding the polished rod is inserted into the lower region of the device.
    • SUMMARY OF THE INVENTION
  • The problem underlying the invention is to create a reverse rotation protection with which the drive train of a borehole pump can be secured against rotational movements when not in operation.
  • The above problem is solved by a reverse rotation protection according to the invention. Further advantageous embodiments can be found in the features of the sub-claims.
  • A reverse rotation protection for borehole pumps is disclosed, wherein the reverse rotation protection according to the invention is disposed in a drive head. The reverse rotation protection comprises a housing and a clamping tool for securing a polished rod. The clamping tool comprises at least two exchangeable contact elements with which the polishing rod can be fixed releasably.
  • The contact elements are each introduced releasably into a holding fixture. Each contact element is connected to the holding fixture by means of at least one screw. The contact elements are produced from a non-sparking and pressure-resistant material. The contact elements are preferably produced from bronze, brass or copper.
  • The clamping tool can be adapted to different polished rods with different diameters by means of contact elements differing in size. The contact elements with different internal diameters can be inserted into the holding fixtures of the clamping tool, so that different contact elements can be selected depending on the diameter of the various polished rods. It is clear to a person skilled in the art that, by means of different contact elements, the clamping tool can be adapted to polished rods which have changed their diameter during the operation of the borehole pump.
  • The side of the holding fixture lying opposite the contact element is provided with a groove for receiving a setscrew. The holding fixtures are movable inside the housing by means of the setscrews. Each setscrew is provided with a cap on the side facing away from the holding fixture. The caps are fitted on the setscrews when the contact elements are not in contact with the polished rod. It is thus possible to see that the borehole pump is ready for start-up. When the contact elements are in contact with the polished rod, the setscrews are screwed into the housing of the reverse rotation protection to an extent such that fitting of the caps on the setscrews is not possible. A further advantage of this approach is that the threads of the setscrews are protected by the caps against dirt and adverse weather effects during normal operation.
  • In a particular embodiment, the caps are provided with contacts which display the relaxation state of the reverse rotation protection. Furthermore, the caps are in contact, in each case via a connecting cable, with a control which prevents the borehole pump from starting up in the absence of a signal. This thus ensures that the borehole pump can only be started up when the contact elements are released from the polished rod and the latter is thus not blocked.
  • Furthermore, various process steps play a not inconsiderable role in protecting a borehole pump against undesired rotation of the drive train through reverse rotation. The contact elements are pressed against the polished rod, held against the polished rod and removed from the polished rod by means of actuating units. In preferred embodiments, setscrews or hydraulic actuating elements are used as actuating units. When the contact elements are removed from the polished rod, a contact is closed which releases the start-up of the borehole pump.
  • When use is made of setscrews, the release is brought about by contacts which are disposed in caps, which are screwed onto the setscrews after removal of the contact elements from the polished rod. In the case of the hydraulic actuating elements, this task can be performed by magnetic switches, which are moved by means of the hydraulically operated cylinder.
  • Examples of embodiment of the invention and its advantages are explained in detail below with the aid of the appended figures. The size ratios of the individual elements with respect to one another in the figures do not always correspond to the actual size ratios, since some forms are represented simplified and other forms, for the sake of greater clarity, magnified in relation to the other elements.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 shows the position of the reverse rotation protection in the drive head.
  • FIG. 2 shows in detail the reverse rotation protection according to the invention.
  • FIG. 3 shows a perspective view of the reverse rotation protection.
  • FIG. 4 shows a reverse rotation protection with electronic start-up protection.
  • FIG. 5 shows in detail the protection system of a reverse rotation protection.
    •  DETAILED DESCRIPTION OF THE INVENTION
  • FIG. 1 shows the position of reverse rotation protection 20 in drive head 10. Reverse rotation protection 20 is disposed in the upper region of skirt 14. Polished rod 12 runs through reverse rotation protection 20, as well as through drive head 10. Motor 18 is fitted on drive head 10 by means of bracket 16.
  • FIG. 2 shows in detail reverse rotation protection 20 according to the invention. Reverse rotation protection 20 comprises a housing 22. Clamping tool 24 for securing polished rod 12 is located in the interior of housing 22. In the embodiment illustrated here, clamping tool 24 comprises two holding fixtures 28, into which contact elements 26 are introduced. Contact elements 26 represent the connection between reverse rotation protection 20 and polished rod 12. Contact elements 26 are connected to holding fixtures 28 in a releasable manner by means of screws 30. Grooves 32, in which setscrews 34 engage, are provided in the sides of holding fixtures 28 lying opposite contact elements 26. Contact elements 26 are pressed against polished rod 12 or released from the latter by means of these setscrews 34. Caps 36 are disposed at the outer ends of setscrews 34. These caps 36 are fitted onto setscrews 34 when contact elements 26 are no longer in contact with polished rod 12 as a result of setscrews 34 being slackened off.
  • FIG. 3 shows a perspective view of reverse rotation protection 20. Holding fixtures 28 are introduced into housing 22. Contact elements 26, which are fixed releasably in holding fixtures 28 by means of screws 30, can be seen in the interior of holding fixtures 28. Furthermore, it is possible to see grooves 32 in which the setscrews (not represented) engage. Caps 36 can be seen at the outer side of housing 22, said caps covering setscrews 34 after removal of contact elements 26 from the polished rod (not represented). Caps 36 are connected to housing 22 by means of retention elements 37 in such a way that they cannot be lost when not in use.
  • FIG. 4 shows a reverse rotation protection 20 with an electronic start-up protection. In this example of embodiment, caps 36 are provided with contacts 38, which are connected by connecting cables 42 to a control 40. In this example of embodiment, control 40, like caps 36 too, is fitted to housing 22 of reverse rotation protection 20.
  • FIG. 5 shows in detail the protection system of reverse rotation protection 20 according to the invention. Setscrews 34 are disposed laterally in housing 22 of reverse rotation protection 20. The position of holding fixtures 28 and therefore contact elements 26 is changed with these setscrews 34. When contact elements 26 have been removed from the polished rod (not represented), setscrews 34 project beyond the housing part. If caps 36 are screwed onto setscrews 34, a connection is created between the heads of setscrews 34 and contacts 38. An electrical circuit is closed by this connection, which makes it possible to start the drive of the borehole pump.
  • The invention has been described by reference to a preferred embodiment.

Claims (11)

1. A reverse rotation protection for a borehole pump, wherein the reverse rotation protection is disposed in a drive head, wherein the reverse rotation protection comprises a housing and a clamping tool for securing a polished rod, characterised in that the clamping tool comprises at least two exchangeable contact elements, with which the polished rod can be fixed releasably.
2. The reverse rotation protection according to claim 1, characterised in that the contact elements are each introduced releasably into a holding fixture.
3. The reverse rotation protection according to claim 1, characterised in that each contact element is connected to the holding fixture by means of at least one screw.
4. The reverse rotation protection according to claim 3, characterised in that the contact elements are produced from a non-sparking and pressure-resistant material.
5. The reverse rotation protection according to claim 1, characterised in that the clamping tool can be adapted to diameters of different rods by means of contact elements of differing size.
6. The reverse rotation protection according to claim 1, characterised in that the holding fixture is provided, on the side lying opposite the contact element, with a groove for receiving a setscrew.
7. The reverse rotation protection according to claim 6, characterised in that the holding fixtures are movable inside the housing by means of the setscrews.
8. The reverse rotation protection according to claim 1, characterised in that each setscrew is provided with a cap on the side facing away from the holding fixture.
9. The reverse rotation protection according to claim 8, characterised in that the caps are fitted on the setscrews when the contact elements are not in contact with the polished rod.
10. The reverse rotation protection according to claim 8, characterised in that the caps are provided with contacts, which display a relaxation state of the reverse rotation protection.
11. The reverse rotation protection according to claim 8, characterised in that the caps are in contact, in each case via a connecting cable, with a control which prevents the borehole pump from starting up in the absence of a signal.
US14/063,871 2011-04-27 2013-10-25 Reverse Rotation Protection For Borehole Pumps Abandoned US20140048246A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102011018755A DE102011018755B4 (en) 2011-04-27 2011-04-27 Reversing protection for borehole pumps
DE102011018755.3 2011-04-27
PCT/DE2012/000416 WO2012146234A2 (en) 2011-04-27 2012-04-19 Reverse rotation protection for borehole pumps

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2012/000416 Continuation WO2012146234A2 (en) 2011-04-27 2012-04-19 Reverse rotation protection for borehole pumps

Publications (1)

Publication Number Publication Date
US20140048246A1 true US20140048246A1 (en) 2014-02-20

Family

ID=46275635

Family Applications (1)

Application Number Title Priority Date Filing Date
US14/063,871 Abandoned US20140048246A1 (en) 2011-04-27 2013-10-25 Reverse Rotation Protection For Borehole Pumps

Country Status (9)

Country Link
US (1) US20140048246A1 (en)
EP (1) EP2702244A2 (en)
CN (1) CN103477027B (en)
AU (1) AU2012247897A1 (en)
CA (1) CA2831521A1 (en)
DE (1) DE102011018755B4 (en)
RU (1) RU2565126C2 (en)
WO (1) WO2012146234A2 (en)
ZA (1) ZA201308016B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2693118C1 (en) * 2018-11-28 2019-07-01 Общество С Ограниченной Ответственностью "Оклэс Технолоджиз" Device for prevention of turbine rotation
RU2693120C1 (en) * 2018-11-28 2019-07-01 Общество С Ограниченной Ответственностью "Оклэс Технолоджиз" Hydraulic protection with device for prevention of turbine rotation
US11255139B2 (en) * 2016-10-17 2022-02-22 Risun Oilflow Solutions Inc. Sealing/locking rod safety clamp and ram system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013206355A1 (en) * 2013-04-11 2014-10-16 Rohöl-Aufsuchungs Aktiengesellschaft Petroleum extraction device with rotating device
CN112901093A (en) * 2021-03-25 2021-06-04 淮南矿业(集团)有限责任公司 Auxiliary device for iron pipe discharging of drilling machine and installation method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6843313B2 (en) * 2000-06-09 2005-01-18 Oil Lift Technology, Inc. Pump drive head with stuffing box

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4860826A (en) * 1988-01-28 1989-08-29 Land John L Apparatus for sealing a tubing string in a high pressure wellbore
US5551510A (en) * 1995-03-08 1996-09-03 Kudu Industries Inc. Safety coupling for rotary down hole pump
US5575451A (en) * 1995-05-02 1996-11-19 Hydril Company Blowout preventer ram for coil tubing
CA2216456C (en) * 1997-09-25 2000-12-12 Daniel Lee Blow-out preventer
US6039115A (en) * 1998-03-28 2000-03-21 Kudu Indutries, Inc. Safety coupling for rotary pump
CA2270017A1 (en) * 1999-04-26 2000-10-26 Lynn P. Tessier Rotary pump top drive
CA2349988E (en) 2000-06-09 2008-01-22 Oil Lift Technology Inc. Polish rod locking clamp
US6557643B1 (en) 2000-11-10 2003-05-06 Weatherford/Lamb, Inc. Rod hanger and clamp assembly
US7000888B2 (en) * 2004-03-29 2006-02-21 Gadu, Inc. Pump rod clamp and blowout preventer
CA2462183C (en) * 2004-03-29 2006-08-15 Gadu Inc. Pump rod clamp and blowout preventer
WO2005119885A1 (en) * 2004-06-04 2005-12-15 Tessier Lynn P A frameless switched reluctance motor and application as a top drive for a rotary pump
US7673674B2 (en) * 2006-01-31 2010-03-09 Stream-Flo Industries Ltd. Polish rod clamping device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6843313B2 (en) * 2000-06-09 2005-01-18 Oil Lift Technology, Inc. Pump drive head with stuffing box

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11255139B2 (en) * 2016-10-17 2022-02-22 Risun Oilflow Solutions Inc. Sealing/locking rod safety clamp and ram system
RU2693118C1 (en) * 2018-11-28 2019-07-01 Общество С Ограниченной Ответственностью "Оклэс Технолоджиз" Device for prevention of turbine rotation
RU2693120C1 (en) * 2018-11-28 2019-07-01 Общество С Ограниченной Ответственностью "Оклэс Технолоджиз" Hydraulic protection with device for prevention of turbine rotation
EA036329B1 (en) * 2018-11-28 2020-10-27 Общество С Ограниченной Ответственностью "Оклэс Технолоджиз" Device for prevention of turbine rotation
US11067138B2 (en) 2018-11-28 2021-07-20 Oklas Technologies Limited Liability Company Device for prevention of turbine rotation

Also Published As

Publication number Publication date
EP2702244A2 (en) 2014-03-05
AU2012247897A1 (en) 2013-10-24
WO2012146234A2 (en) 2012-11-01
RU2565126C2 (en) 2015-10-20
CN103477027B (en) 2016-10-12
WO2012146234A3 (en) 2013-04-11
CN103477027A (en) 2013-12-25
CA2831521A1 (en) 2012-11-01
ZA201308016B (en) 2014-07-30
RU2013152373A (en) 2015-06-10
DE102011018755A1 (en) 2012-10-31
DE102011018755B4 (en) 2013-10-24

Similar Documents

Publication Publication Date Title
US20140048246A1 (en) Reverse Rotation Protection For Borehole Pumps
US8869661B2 (en) Tool for the handling of a protection device for subsea electrical or fiber optical connectors
JP2016175179A (en) Tensioning device for applying stress to threaded bolt
EP2601718B1 (en) Illuminating device and sealing element therefor
CN102847980A (en) Core drilling machine
CN102112698B (en) Load bearing assembly
WO2002082591A1 (en) Field attachable electrical connector & self-tightening method of strain relief
KR100805224B1 (en) Elbor Connector Seperation Device and The No Blackout Method for Underground Cable Using The Same
CN103647163B (en) A grounding wire clamp dedicated to a DC 800kV strain tower current drainage aluminum pipe
CN114284961B (en) Parallel groove clamp mounting structure
CN104104035A (en) Cable fixing fastener for power distribution cabinet
JP5420745B1 (en) Tip tool mounting adapter
US20070175651A1 (en) Cable coupler clamp assembly
JP2012223865A (en) Screw fall prevention device
JP5872519B2 (en) Ratchet tool for indirect hot wire work
JP5172396B2 (en) Power cable pooling eye
WO2008018112A1 (en) Device for quickly fixing an armor to a rod of a street lighting pole
CN202348787U (en) Special tool for dismounting mechanical seal sleeve of centrifugal pump
CN208767101U (en) A kind of high pressure protector of bank electricity boat-carrying isolating transformer
CN211480694U (en) Breaker maintenance tool
WO2017205757A1 (en) Connector maintenance panel
CN212009056U (en) Optical cable joint box optical cable reinforcing apparatus
EP2685561A1 (en) Tapping connector with insulation displacement contact
CN114809957A (en) Device for screwing off rod pipe
CN204497423U (en) Wiring frock

Legal Events

Date Code Title Description
AS Assignment

Owner name: NETZSCH PUMPEN & SYSTEME GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CEMIN, ANGELO;DITTRICH, JOCHEN;ZUBER, ALEXANDER;SIGNING DATES FROM 20130919 TO 20131014;REEL/FRAME:031487/0547

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION