CN106014287B - A kind of petroleum pipeline and its application - Google Patents

A kind of petroleum pipeline and its application Download PDF

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Publication number
CN106014287B
CN106014287B CN201610544498.7A CN201610544498A CN106014287B CN 106014287 B CN106014287 B CN 106014287B CN 201610544498 A CN201610544498 A CN 201610544498A CN 106014287 B CN106014287 B CN 106014287B
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CN
China
Prior art keywords
sucker rod
box cupling
snap ring
bulge loop
petroleum pipeline
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Active
Application number
CN201610544498.7A
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Chinese (zh)
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CN106014287A (en
Inventor
李永安
高光亮
姜东�
杨钢
谢梅波
刘书杰
陈军
周宏斌
张金中
林继兴
胡孙达
李振坤
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.)
ZHEJIANG RUIZHI STEEL INDUSTRY Co Ltd
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ZHEJIANG RUIZHI STEEL INDUSTRY Co Ltd
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Priority to CN201610544498.7A priority Critical patent/CN106014287B/en
Publication of CN106014287A publication Critical patent/CN106014287A/en
Application granted granted Critical
Publication of CN106014287B publication Critical patent/CN106014287B/en
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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/10Wear protectors; Centralising devices, e.g. stabilisers
    • E21B17/1071Wear protectors; Centralising devices, e.g. stabilisers specially adapted for pump rods, e.g. sucker rods
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02Couplings; joints

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Supports For Pipes And Cables (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)

Abstract

The invention discloses a kind of petroleum pipeline and its application, its drip irrigation device is:Including sucker rod and it is arranged on the box cupling of sucker rod end, also include being detachably arranged at sucker rod and the junction of box cupling is arranged with sheath, the scrobicular ring coaxial with sheath is provided with inside the sheath, the sucker rod is located at the first bulge loop of the outwardly formation in part in scrobicular ring, the box cupling is located at the second bulge loop of the outstanding formation in part in scrobicular ring, the inwall of scrobicular ring is provided with the first snap ring and the second snap ring, when sucker rod and box cupling depart from, first snap ring is inserted in the first bulge loop, and the second snap ring is inserted in the second bulge loop.After thread failure between sucker rod and box cupling, sucker rod comes off out of box cupling, now, the first snap ring in scrobicular ring is inserted in the first bulge loop, second snap ring is inserted in the second bulge loop, position-limiting action can be played in the axial direction, avoid sucker rod from being fallen off with box cupling, from the gap of sucker rod and box cupling in the oil that sprays will not spray immediately.

Description

A kind of petroleum pipeline and its application
Technical field
The present invention relates to oil recovery machiner field, more specifically, it relates to a kind of petroleum pipeline and its application.
Background technology
With the reduction of oil reservoir energy and the rising of water content, oil field development enters high water-cut stage, due to hole deviation, sleeve pipe The reasons such as flexural deformation cause rod-pumped well load to be continuously increased, because the well liquid corrosion lubrication state constantly reason such as deterioration causes Pumping well pipe and sucker rod partial wear problem are increasingly severe, particularly, in current oil field development, High water cut, high salinity production The corrosion for going out liquid more exacerbates side-abrasion of rod string and the corrosion of rod-pumped well, because the corrosion of rod-pumped well side-abrasion of rod string not only shortens The oil well production cycle, operation well time and operating cost are added, moreover, existing antiwear and reducing friction auxiliary structure is complicated, manufacturing cost It is high.
Therefore, publication No. provides a kind of oil well anti-corrosion righting anti-attrition pair for CN202645466U utility model, bag Include:Box cupling body, described box cupling body interior is hollow structure, provided with internal thread;Sucker rod, described sucker rod one end are set There is external screw thread, the other end is connected with box cupling body;Supporting positive cover, described supporting positive cover are slidably socketed in the middle part of sucker rod; Wherein, the both ends of described box cupling body are in arc-shaped.Further, the box cupling body both ends are provided with wear-resistant layer;Wear-resistant layer For Wear-resistant material.According to a variety of oil recovery operating modes, different bodies and Wear-resistant material are selected, can easily be had Effect ground reduces the abrasion of flow string and rod collar, extends service life, so as to reach the purpose for reducing cost for oil production.
Petroleum pipeline of the prior art, mainly including sucker rod, box cupling, box cupling and sucker rod are provided with the both ends of sucker rod Only realize and connect simply by screw thread, in actual use, after the screw thread between box cupling and sucker rod is damaged, spiral shell Line Joint failure, sucker rod depart from clip, and the oil in sucker rod will outwards spray immediately, cause unnecessary waste, The reliability of petroleum pipeline is reduced to a certain extent.
The content of the invention
In view of the shortcomings of the prior art, it is an object of the invention to provide a kind of petroleum pipeline, between sucker rod and box cupling Oil during thread failure in sucker rod will not outwards spray immediately.
The present invention above-mentioned technical purpose technical scheme is that:A kind of petroleum pipeline, including oil pumping Bar and the box cupling for being arranged on sucker rod end, in addition to it is detachably arranged at sucker rod and the junction of box cupling is arranged with shield Set, is provided with the scrobicular ring coaxial with sheath inside the sheath, and the sucker rod is located at the outwardly formation in part in scrobicular ring the One bulge loop, the box cupling are located at the second bulge loop of the outstanding formation in part in scrobicular ring, and the inwall of scrobicular ring is provided with the first snap ring And second snap ring, when sucker rod and box cupling depart from, the first snap ring is inserted in the first bulge loop, and the second snap ring inserts the second bulge loop Interior, the side wall of first bulge loop is provided with the first annular groove being caught in for the first snap ring, is set in the side wall of second bulge loop There is the second annular groove being caught in for the second snap ring, the bottom wall of the first annular groove is provided with the first movable contact, first card Ring is provided with the first stationary contact that can be abutted with the first movable contact, and the bottom wall of second annular groove is dynamic tactile provided with second Point, second snap ring are provided with the second stationary contact that can be abutted with the second movable contact, first movable contact and first Stationary contact is connected with the first sender unit, and second movable contact and the second stationary contact are connected with secondary signal transmitting dress Put.
By using above-mentioned technical proposal:After thread failure between sucker rod and box cupling, sucker rod is out of box cupling Come off, now, the distance between the first bulge loop and the second bulge loop increase, and the first snap ring in scrobicular ring is inserted in the first bulge loop, the Two snap rings are inserted in the second bulge loop, can be in axle by setting the first snap ring, the first bulge loop, the second snap ring and the second bulge loop Line plays position-limiting action on direction, avoids sucker rod from being fallen off with box cupling, in addition, the first snap ring inserts the first bulge loop, second Snap ring inserts the second bulge loop, can play sealing function, so, from the gap of sucker rod and box cupling in the oil that sprays will not be immediately Spray.First annular groove and the second annular groove are set, you can realize the sealing between the first snap ring and the first bulge loop and Sealing between two snap rings and the second bulge loop, structure very simple, good sealing effect.When sucker rod drops out out of box cupling, Now, the first snap ring is inserted in first annular groove, and the first stationary contact contacts with the first movable contact, and the first sender unit is outside Transmission signal, likewise, secondary signal emitter also outside transmission signal, when receiving the first sender unit hair simultaneously When the signal penetrated and the signal of the second emitter transmitting, you can judge that now sucker rod has occurred and that damage with box cupling It is bad, and then sucker rod and box cupling can be repaired in time.
Preferably, the sheath includes symmetrically arranged upper jacket and lower jacket, the upper jacket and lower jacket it Between be detachably connected.
By using above-mentioned technical proposal:The sheath of one entirety is arranged to split, when mounted, conveniently can will Sheath is installed to the outside of sucker rod and box cupling, also, also very convenient in detachable maintaining.
It is detachably connected preferably, being realized between the upper jacket and lower jacket by attachment screw.
By using above-mentioned technical proposal:It is simple in construction using mode connects for screw, reliable operation, process and dismantle equal ten It is convenient to divide.
Preferably, the outer circumference surface of the box cupling is provided with air-vent, it is saturating to be detachably provided with TPU waterproofs in the air-vent Air film.
By using above-mentioned technical proposal:Due to the internal diameter of box cupling and the internal diameter of sucker rod and unequal, therefore, oil from After sucker rod enters in box cupling, bubble can be produced in box cupling, air-vent is set, the bubble in box cupling can be facilitated to discharge, TPU waterproof ventilated membranes are set in air-vent, only allow air out of waterproof ventilated membrane by that can avoid in transportation Gas in sucker rod be present, the fluid of transport is impacted.
Preferably, the air-vent internal thread is connected with stud, it is provided with the stud and is used to TPU waterproof ventilated membranes be installed Mounting hole, be embedded with the carbon fiber wire being fixedly connected with mounting hole in the TPU waterproof ventilated membranes.
By using above-mentioned technical proposal:Stud is set, in actual use, stud is directly screwed in into air-vent, you can The dismounting and installation of TPU waterproof ventilated membranes are realized, because threaded connection has auto-lock function, it is extra to therefore, there is no need to increase Latch-up structure, simplify structure, carbon fiber wire be set, therefore, can be to TPU because the tensile strength of carbon fiber wire is very high Waterproof ventilated membrane plays a protective role, and avoids TPU waterproof ventilated membranes from being subject to crushing in the presence of oil pressure.
Preferably, the outer circumference surface of the sucker rod and box cupling is provided with anti-corrosion layer.
By using above-mentioned technical proposal:Anti-corrosion layer is set, the outer surface of sucker rod can be made there is anti-corrosion function, kept away Exempt from sucker rod to be corroded when in use, extend the service life of sucker rod.
Preferably, the anti-corrosion layer includes hydroxy terminated poly- butadiene-polyurethane modified epoxy anticorrosive paint layer.
By using above-mentioned technical proposal:Hydroxy terminated poly- butadiene-polyurethane modified epoxy anticorrosive paint layer is by end hydroxyl Uniformly coating forms base polybutadiene polyurethane modified epoxy anticorrosive paint, hydroxy terminated poly- butadiene-polyurethane modified epoxy Resin anti-corrosive paint is the very excellent anticorrosive paint of the performance being currently known, and has excellent oil resistant, water-fast, heatproof, corrosion resistant The requirement of the performance such as erosion, wear-resistant.
It is a further object of the present invention to provide a kind of application of petroleum pipeline.
A kind of application of above-mentioned petroleum pipeline, the sucker rod can be used for marine petroleum transportation.
By using above-mentioned technical proposal:Due to being provided with anti-corrosion layer in the outer surface of sucker rod and box cupling, therefore, Sucker rod can effectively be avoided by seawater corrosion, extend the service life of sucker rod.
In summary, the invention has the advantages that:
1st, after the thread failure between sucker rod and box cupling, sucker rod comes off out of box cupling, now, the first bulge loop with The distance between second bulge loop increases, and the first snap ring in scrobicular ring is inserted in the first bulge loop, and the second snap ring is inserted in the second bulge loop, By setting the first snap ring, the first bulge loop, the second snap ring and the second bulge loop, position-limiting action can be played in the axial direction, Sucker rod is avoided to be fallen off with box cupling, in addition, the first snap ring inserts the first bulge loop, the second snap ring inserts the second bulge loop, can be with Play sealing function, so, from the gap of sucker rod and box cupling in the oil that sprays will not spray immediately;
2nd, when sucker rod drops out out of box cupling, now, the first snap ring is inserted in first annular groove, the first stationary contact with First movable contact contacts, the outside transmission signal of the first sender unit, likewise, secondary signal emitter is also outwards launched Signal, when the signal of the signal and the transmitting of the second emitter that receive the transmitting of the first sender unit simultaneously, It can judge that now sucker rod has occurred and that damage with box cupling, and then sucker rod and box cupling can be repaired in time.
Brief description of the drawings
Fig. 1 is the assembled view of the present embodiment;
Fig. 2 is the assembling explosive view one of the present embodiment;
Fig. 3 is the assembling explosive view two of the present embodiment;
Fig. 4 is the sectional arrangement drawing of the present embodiment;
Fig. 5 is A portions enlarged drawing in Fig. 4;
Fig. 6 is B portions enlarged drawing in Fig. 4.
In figure:1st, sucker rod;11st, the first bulge loop;111st, first annular groove;2nd, box cupling;21st, the second bulge loop;22nd, the second ring Shape groove;23rd, operating surface;24th, air-vent;3rd, sheath;31st, upper jacket;32nd, lower jacket;4th, scrobicular ring;41st, the first snap ring;42nd, Two snap rings;5th, the first movable contact;51st, the first stationary contact;6th, the second movable contact;61st, the second stationary contact;7th, stud;71st, through hole; 72nd, TPU waterproof ventilated membranes;8th, sealing-plug;9th, carbon fiber wire.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing 1-6.
A kind of petroleum pipeline, including sucker rod 1 and the box cupling 2 for being arranged on the end of sucker rod 1, sucker rod 1 pass through with box cupling 2 Threaded connection is fixed, and is equipped with operating surface 23 in the both ends of the surface of box cupling 2, operating surface 23 is symmetricly set on the both sides of box cupling 2, is revolving When switching hoop 2, operating surface 23 can be used as stress point, and convenient wrench rotates box cupling 2, set on the outer circumference surface of box cupling 2 There is air-vent 24, air-vent 24 is provided with air-vent 24 with being communicated inside box cupling 2 and is threaded with stud 7, passed through on stud 7 Through hole 71 is equipped with, the radial direction of the interior edge through hole 71 of through hole 71 is adhesively fixed with TPU waterproof ventilated membranes 72, in TPU waterproof ventilated membranes Carbon fiber wire 9 is embedded with 72, carbon fiber wire 9 is more, and array is embedded in TPU waterproof ventilated membranes 72, also, carbon fiber wire 9 with the inwall of through hole 71 by being adhesively fixed, sealing-plug 8 is also threaded with air-vent 24, when need not be breathed freely When, sealing-plug 8 can be used, air-vent 24 is blocked, ensure that the sealing property of box cupling 2.
Sheath 3 is provided with the outer cover of box cupling 2 and sucker rod 1, sheath 3 is arranged on the connection of box cupling 2 and sucker rod 1 Go out, sheath 3 is a hollow cylinder, and scrobicular ring 4 is provided with the inner peripheral surface of cylinder, and scrobicular ring 4 is coaxially disposed with sheath 3, taken out It is outwardly on the outer circumference surface of beam hanger 1 to be provided with the first bulge loop 11, the second bulge loop 21 is provided with the outer circumference surface of box cupling 2, the One bulge loop 11 and the second bulge loop 21 are respectively positioned in scrobicular ring 4, on the inwall of scrobicular ring 4 positioned at the first bulge loop 11 and the second bulge loop 21 it Between be provided with the first snap ring 41 and the second snap ring 42, the L-shaped setting in cross section of the first snap ring 41 and the second snap ring 42, the first card Ring 41 is fixedly connected with one end on the second snap ring 42 with scrobicular ring 4, and the first snap ring 41 is inserted into the side of the first bulge loop 11, the Two snap rings 42 are inserted into the side of the second bulge loop 21, first annular groove 111 are provided with the side of the first bulge loop 11, second The side of bulge loop 21 is provided with the second annular groove 22, and the thickness of first annular groove 111 is equal with the thickness of the first snap ring 41, and second The thickness of annular groove 22 is equal with the thickness of the second snap ring 42, when the first snap ring 41 is inserted in first annular groove 111, the second snap ring After in 42 the second annular grooves of insertion 22, a closed space can be formed between the first bulge loop 11 and the second bulge loop 21, can To avoid oil from being dropped out out of sheath 3.
The first movable contact 5 is provided with the bottom wall of first annular groove 111, the bottom wall of annular groove is provided with the second movable contact 6, First movable contact 5 and the first stationary contact 51 are connected with the first sender unit, when the first snap ring 41 inserts first annular groove When in 111, the first movable contact 5 contacts with the first stationary contact 51, the outside transmission signal of the first sender unit, the second card Ring 42 is provided with the second stationary contact 61 that can be abutted with the second movable contact 6, when the second snap ring 42 is inserted in the second annular groove 22 When, the second movable contact 6 contacts with the second stationary contact 61, and the second movable contact 6 and the second stationary contact 61 are connected with the second letter Number emitter, secondary signal method god device outwards launch corresponding signal.
In the present embodiment, sheath 3 is split settings, including upper jacket 31 and lower jacket 32, upper jacket 31 and lower shield Set 32 is fixedly connected, screw using the face where the axis of sheath 3 as the plane of symmetry between upper jacket 31 and lower jacket 32 by screw For several, array is arranged on two sides of sheath 3.
Be equipped with anti-corrosion layer on the outer circumference surface of sucker rod 1 and box cupling 2, anti-corrosion layer be coated on sucker rod 1 with And the outer surface of box cupling 2, it can effectively avoid box cupling 2 from including the poly- ammonia of end hydroxy butadiene by seawater corrosion, anti-corrosion layer Ester modified anti-corrosive paint of epoxy resin layer, hydroxy terminated poly- butadiene-polyurethane modified epoxy anticorrosive paint layer are gathered by terminal hydroxy group Uniformly coating forms butadiene urethane modified epoxy anticorrosive paint, is that the very excellent anti-corrosion of the performance being currently known applies Material, there is the requirement of the performance such as excellent oil resistant, water-fast, heatproof, corrosion-resistant, wear-resistant, its specific preparation method, be referred to Deng Chun Asus of Shandong University scholar's《The preparation of hydroxy terminated poly- butadiene-polyurethane modified epoxy anticorrosive paint is ground with performance Study carefully》.
A kind of application of petroleum pipeline, can be used for marine petroleum transportation, can play sufficiently stable conveying effect, protect The stability and reliability in course of conveying are demonstrate,proved.
Described above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned implementation Example, all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that for the art Those of ordinary skill for, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications It should be regarded as protection scope of the present invention.

Claims (8)

1. a kind of petroleum pipeline, including sucker rod (1) and the box cupling (2) for being arranged on sucker rod (1) end, it is characterised in that:Also Junction including being detachably arranged at sucker rod (1) and box cupling (2) is arranged with sheath (3), be provided with inside the sheath (3) with The coaxial scrobicular ring (4) of sheath (3), the sucker rod (1) are located at the first bulge loop of the outwardly formation in part in scrobicular ring (4) (11), the box cupling (2) is located at part the second bulge loop of outstanding formation (21) in scrobicular ring (4), is set on the inwall of scrobicular ring (4) There are the first snap ring (41) and the second snap ring (42), when sucker rod (1) and box cupling (2) depart from, the first snap ring (41) insertion the In one bulge loop (11), the second snap ring (42) is inserted in the second bulge loop (21), and the side wall of first bulge loop (11) is provided with for the The first annular groove (111) that one snap ring (41) is caught in, the side wall of second bulge loop (21) is provided with blocks for the second snap ring (42) The second annular groove (22) entered, the bottom wall of the first annular groove (111) are provided with the first movable contact (5), first snap ring (41) the first stationary contact (51) that can be abutted with the first movable contact (5) is provided with, on the bottom wall of second annular groove (22) Provided with the second movable contact (6), second snap ring (42) is provided with the second stationary contact that can be abutted with the second movable contact (6) (61), first movable contact (5) and the first stationary contact (51) are connected with the first sender unit, second movable contact (6) and the second stationary contact (61) is connected with secondary signal emitter.
2. petroleum pipeline according to claim 1, it is characterised in that:The sheath (3) includes symmetrically arranged upper jacket (31) and lower jacket (32), it is detachably connected between the upper jacket (31) and lower jacket (32).
3. petroleum pipeline according to claim 2, it is characterised in that:Pass through between the upper jacket (31) and lower jacket (32) Attachment screw is realized and is detachably connected.
4. petroleum pipeline according to claim 1, it is characterised in that:The outer circumference surface of the box cupling (2) is provided with air-vent (24) TPU waterproof ventilated membranes (72) detachably, are provided with the air-vent (24).
5. petroleum pipeline according to claim 4, it is characterised in that:Air-vent (24) internal thread is connected with stud (7), The mounting hole for being used for installing TPU waterproof ventilated membranes (72) is provided with the stud (7), the TPU waterproof ventilated membranes (72) are embedded Provided with the carbon fiber wire (9) being fixedly connected with mounting hole.
6. petroleum pipeline according to claim 1, it is characterised in that:The sucker rod (1) and the outer circumference surface of box cupling (2) It is provided with anti-corrosion layer.
7. petroleum pipeline according to claim 6, it is characterised in that:The anti-corrosion layer includes the poly- ammonia of end hydroxy butadiene Ester modified anti-corrosive paint of epoxy resin layer.
A kind of 8. application of the petroleum pipeline described in claim 1-7 any one, it is characterised in that:The petroleum pipeline can be used for sea In petroleum transportation.
CN201610544498.7A 2016-07-07 2016-07-07 A kind of petroleum pipeline and its application Active CN106014287B (en)

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Application Number Priority Date Filing Date Title
CN201610544498.7A CN106014287B (en) 2016-07-07 2016-07-07 A kind of petroleum pipeline and its application

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610544498.7A CN106014287B (en) 2016-07-07 2016-07-07 A kind of petroleum pipeline and its application

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CN106014287B true CN106014287B (en) 2018-01-30

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CN106481283A (en) * 2016-11-29 2017-03-08 无锡金顶石油管材配件制造有限公司 A kind of pressure release type petroleum pipeline deferent box cupling structure
CN106761459B (en) * 2017-02-28 2018-12-11 中国石油大学(华东) It is a kind of using carbon fiber as the fixed length carbon-fiber continuous rod connector of supporting body
US20180264604A1 (en) * 2017-03-14 2018-09-20 Reel Power Licensing Corp. Remotely activated connection device for a spiral shoulder connection
CN107131171A (en) * 2017-05-31 2017-09-05 苏州驱指自动化科技有限公司 It is superimposed gold utensil cylinder
CN109372442B (en) * 2018-11-26 2024-06-11 中国石油大学(北京) Joint coating process method of anti-corrosion oil pipe, anti-corrosion oil pipe and unit thereof

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CN204827254U (en) * 2015-06-03 2015-12-02 张文峰 Anticorrosive wear -resisting sucker rod, beam hanger coupling and beam hanger group
CN105178879A (en) * 2015-09-22 2015-12-23 金华市春光橡塑软管有限公司 Torsion releasing mechanism and oil pumping device with same

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Publication number Priority date Publication date Assignee Title
US5941312A (en) * 1997-09-15 1999-08-24 Rg Industries Ltd. Method of fabricating a rod guide, and a rod guide/sucker rod combination
CN201460765U (en) * 2009-07-23 2010-05-12 北京市三一重机有限公司 Detachment-prevention device for extension arm
CN202645466U (en) * 2012-07-17 2013-01-02 浙江睿智钢业有限公司 Antiseptic righting anti-attrition pair for oil well
CN104295244A (en) * 2014-09-30 2015-01-21 胜利油田胜机石油装备有限公司 Combined antiseptic and wear-resistant sucker rod
CN204827254U (en) * 2015-06-03 2015-12-02 张文峰 Anticorrosive wear -resisting sucker rod, beam hanger coupling and beam hanger group
CN105178879A (en) * 2015-09-22 2015-12-23 金华市春光橡塑软管有限公司 Torsion releasing mechanism and oil pumping device with same

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