WO2009039739A1 - Ensemble de tête de puits - Google Patents

Ensemble de tête de puits Download PDF

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Publication number
WO2009039739A1
WO2009039739A1 PCT/CN2008/071857 CN2008071857W WO2009039739A1 WO 2009039739 A1 WO2009039739 A1 WO 2009039739A1 CN 2008071857 W CN2008071857 W CN 2008071857W WO 2009039739 A1 WO2009039739 A1 WO 2009039739A1
Authority
WO
WIPO (PCT)
Prior art keywords
ring
wellhead
packing
cap
wall
Prior art date
Application number
PCT/CN2008/071857
Other languages
English (en)
Chinese (zh)
Inventor
Banglai Mao
Original Assignee
Banglai Mao
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 Banglai Mao filed Critical Banglai Mao
Publication of WO2009039739A1 publication Critical patent/WO2009039739A1/fr

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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
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/02—Surface sealing or packing
    • E21B33/03—Well heads; Setting-up thereof

Definitions

  • the invention relates to a wellhead device for oil pumping units for oil fields.
  • the wellhead device is currently an essential device for oilfield oil wells.
  • the wellhead device includes a wellhead seal device that draws oil from the ground through the up and down movement of the polished rod in the wellhead seal.
  • a packing cavity is provided in which the packing is placed.
  • the outer surface of the polished rod is easily corroded, and the burrs and pits on the surface of the polished rod are formed.
  • the consumption of the packing becomes large, and it takes time and labor to install the packing in the packing box, the labor intensity of the worker is large, and the top wire is usually provided in the existing wellhead sealing device.
  • the top wire is easily ejected due to the high pressure, causing damage to the human body.
  • Chinese Patent No. 03104543.X discloses a wear-resistant and corrosion-resistant device for a wellhead of a pumping unit. By providing a sealing sleeve outside the polished rod, the polished rod is fixed to the sealing sleeve by a clamping device, and chrome plating is provided on the surface of the sealing sleeve. Layer to protect the polished rod from corrosion.
  • the invention cannot overcome the problem of eccentric wear of the well wellhead, and only one packing box is provided. When the packing is replaced, the well needs to be shut down and the pressure is drained before the packing can be replaced, which will result in waste of oil and water and the presence of packing. The inconvenience of replacing the inconvenience.
  • Chinese Patent No. 200710013483.9 discloses a corrosion-resistant multifunctional high-pressure wellhead device, which solves the problem of eccentric wear of the wellhead by setting a spherical base and a spherical body, but the structure is too single One, and can not achieve a better adjustment effect.
  • the invention also employs a cylindrical upper packing box and a lower packing box for the cone to facilitate the replacement of the packing, but the effect of the invention of the invention is not ideal. Summary of the invention
  • the technical problem to be solved by the present invention is to provide a wellhead device for preventing hoisting of the wellhead.
  • the present invention provides a wellhead device for achieving oil pumping in cooperation with a light rod passing therethrough, the wellhead device comprising:
  • Clamp including a cavity
  • Adjusting the ball head comprising a vertical through hole, the tilting ball head being at least partially rotatably disposed in the ring base;
  • a sealing ring having an inner wall of an arc shape, and an inner diameter of the sealing ring is smaller than a maximum outer diameter of the adjusting ball head, and the sealing ring is sleeved on an outer wall of the adjusting ball head;
  • the adjusting ball head tightening cap forms an accommodating space with the upper part of the annular base in the clip, and the adjusting ball head is placed in the accommodating space.
  • the polished rod sequentially passes through the clamp, the annular base, the adjustment ball head, the seal ring and the adjustment ball head to tighten the upper surface ring of the cap.
  • the wellhead device further includes: a cam rotatably disposed within the annular base.
  • the wellhead device further includes:
  • the outer cylinder is integrally formed on the upper portion of the centering ball, and includes a first hollow portion, and the outer diameter of the first hollow portion is larger than the outer diameter of the through hole included in the adjusting ball;
  • a hollow cylinder comprising a second hollow portion and a third hollow portion communicating with each other, the third The hollow portion has an outer diameter larger than the outer diameter of the second hollow portion, and the corresponding outer hollow wall of the second hollow portion is at least partially fitted in the first hollow portion, and the inner wall of the outer cylinder a sealing joint, a top end of the hollow cylindrical outer wall corresponding to the third hollow portion is connected to a sealing pressure cap; an outer circumferential surface of the hollow cylinder is integrally formed to limit the hollow cylinder and the deviation a first annular boss having a length of the cylindrical sleeve, wherein a lower surface of the first annular boss is at least partially in contact with a top end of the scale-adjusting cylinder; the light rod sequentially passes through the first hollow portion, a second hollow portion, a third hollow portion;
  • the locking nut is partially engaged on the upper surface of the first annular boss, and the locking nut is also screwed to the upper end of the outer wall of the outer cylinder.
  • the wellhead device further includes:
  • a first righting ring located at an inner bottom end of the first hollow portion
  • a packing cap is disposed at an upper end of the third hollow portion to be in contact with the sealing cap. Further, the wellhead device further includes:
  • a first packing located in the first hollow portion, between the first centralizing ring and the sheath portion of the hollow cylinder;
  • a second packing located in the third hollow portion, between the packing cap and the second centralizing ring, and being pressed by the packing cap and the second centralizing ring.
  • first packing and/or the second packing is a plurality of layered annular loops.
  • the wellhead device further includes:
  • a welded pipe joint disposed at a top end of the outer wall of the casing
  • the casing seals the pressure cap, the upper surface of the cap body is opened, and the lower portion of the inner wall of the cap is provided with a thread, and the sleeve sealing pressure cap is disposed behind the polished rod and is screwed with the welded pipe joint.
  • the wellhead device further includes: A casing sealing ring is disposed in the casing sealing pressure cap.
  • the wellhead device further includes:
  • the double card at least a part of the dual card is engaged with the polished rod, and at least a portion is engaged with the welded pipe joint, and the double card is locked by the locking device.
  • the locking device is a bolt and a nut matched thereto, and the locking device is six, and the welded joint splice is located between any two of the locking devices.
  • the wellhead device further includes:
  • the wellhead is connected to the righting ring, and the wellhead connecting righting ring is disposed at a lower portion of the cavity in the clamp. Further, the wellhead device further includes:
  • a first locking ring is disposed on the outer wall of the outer cylinder and is in contact with the locking nut; a second locking ring is disposed on the outer wall of the hollow cylinder and is in contact with the locking nut .
  • the wellhead device further includes:
  • An oil seal is disposed on the outer wall of the hollow cylinder of the hollow cylinder and the set portion of the scale-adjusting cylinder.
  • the invention can automatically adjust the direction with the up and down movement of the polished rod, and prevent the oil from being caused by the eccentric wear and the squeezing of the packing.
  • the invention realizes two cylindrical cavities by arranging a hollow cylinder and another cylindrical body matched thereto, and placing a packing in the same, the invention also provides a tightening nut, which is used in normal times.
  • the lower packing When the lower packing is in the standby state, usually only the upper packing needs to be replaced.
  • the upper packing When the upper packing is replaced, the lower packing is pressed by the tightening of the tightening nut, and the sealing effect of the lower packing is not required.
  • the emptying pressure can quickly complete the replacement of the upper packing, which can reduce the stoppage time and reduce the waste of resources.
  • the invention has a better sealing effect by providing a sleeve outside the light rod, by providing a welded pipe joint at the top end of the sleeve, and connecting the sealing pressure cap through the welded pipe joint, so that the wellhead can be kept sealed after the light rod is broken. There will be no blowout accident after broken bar.
  • the casing of the invention is made of corrosion-resistant and wear-resistant material, which improves the corrosion resistance and wear resistance of the polished rod.
  • Figure 1 is a schematic view showing the structure of a wellhead device of the present invention.
  • FIG. 2 is a schematic view showing the structure of a cam according to an embodiment of the present invention.
  • the main idea of the present invention is to pass the light rod through the pitch-adjusting ball head by providing a ring-shaped base and a matching ball-adjusting ball head, which can be adjusted by adjusting the ball-adjusting ball head on the ring-shaped base.
  • the ball-adjusting ball head moves on the annular base to align the center line of the ball-adjusting ball head with the center line of the light bar, thereby solving the problem of hoisting of the wellhead.
  • the invention integrally comprises a hollow adjusting cylinder on the upper part of the adjusting ball head, and a hollow cylinder with an annular boss is arranged, and the hollow cylinder is sleeved with the adjusting cylinder to realize two a cylindrical cavity in which the packing is placed, the present invention further provides a tightening nut, the upper part of the tightening nut is engaged with the upper surface of the annular boss, the lower part of the tightening nut and the adjusting cylinder Externally threaded connection, when used in normal times, the packing in the cylinder is in a standby state, so usually only the packing in the hollow cylinder needs to be replaced, and when the packing in the hollow cylinder is replaced, the tightening screw is passed.
  • the tightening of the cap will press the lower part of the hollow cylinder to the packing of the cylinder, and the sealing action of the packing can quickly complete the replacement of the packing in the hollow cylinder without the need of the discharge pressure.
  • the wellhead device of the invention comprises: a clamp 1, a wellhead connection righting ring 14, a ring base 17, a deflection ball head 2, a deflection ball head tightening cap 3, a deflection cylinder 4, a hollow cylinder 25, a sealing pressure cap 9 , locking nut 5 , first centralizing ring 15 , second centralizing ring 16 , packing cap 8 , sleeve 21 , welded pipe joint 10 , casing sealing pressure cap 11 , casing sealing ring 20 , double connecting card 13.
  • the first locking ring 6, the second locking ring 7, and the oil seal 24 is shown in FIG. 1, a schematic view of the structure of the wellhead device of the present invention.
  • the wellhead device of the invention comprises: a clamp 1, a wellhead connection righting ring 14, a ring base 17, a deflection ball head 2, a deflection ball head tightening cap 3, a deflection cylinder 4, a hollow cylinder 25, a sealing pressure cap 9 , locking nut 5 ,
  • the clamp 1 includes a cavity, and an annular base 17 is disposed above the cavity, and the inner wall of the annular base 17 is curved to match the outer wall of the adjustment ball head 2; Including a vertical through hole 21, the pitch adjustment ball head 2 is at least partially rotatably disposed within the annular base 17, when When the adjustment ball head 2 is placed inside the annular base 17, the curved inner wall is in contact with the outer wall of the adjustment ball head 2;
  • the wellhead device further includes a sealing ring 18 having an inner wall having an arc shape and an inner diameter smaller than a maximum outer diameter of the biasing ball head 2, and the sealing ring 18 is fitted on the outer wall of the index adjusting ball head 2;
  • the lower end of the cap body of the biasing ball cap tightening cap 3 is screwed to the outer wall of the clip 1.
  • the upper surface of the cap body is a ring, and the inner diameter of the ring is smaller than the outer diameter of the sealing ring 18, the circle
  • the ring is engaged with the sealing ring 18, the biasing ball cap tightening cap 3 and the upper portion of the annular base 17 of the clip 1 form an accommodating space, and the tilting ball head 2 is placed in the accommodating space.
  • the polished rod sequentially passes through the upper end ring of the clamp 1, the annular base 17, the deflection ball head 2, the seal ring 18 and the adjustment ball head tightening cap 3.
  • the seal ring 18 is fitted over the outer wall of the pitch-adjusting ball head 2, its curved inner wall comes into contact with the outer wall of the pitch-adjusting ball head 2 to achieve a good sealing effect.
  • a cam can also be set. This constitutes a further embodiment of the invention.
  • FIG. 2 there is shown a schematic view of the structure of the cam of the present embodiment.
  • the cam 201 is a cylindrical structure or a disc structure, and the cam 201 is provided with an opening 202.
  • the opening 202 is different from the cam 201, and the cam 201 is rotatably disposed in the annular base 17, the light rod sequentially passes through the clamp 1, the annular base 17, the opening 202 of the cam 201, the adjustment ball head 2, the sealing ring 18 and the adjustment ball head Tighten the upper surface ring of the cap 3.
  • the opening 202 moves along an elliptical trajectory, so that the position of the polished rod can be adjusted, which is better in the case of large deviation.
  • the effect of the shift
  • the cam can also adopt other structural forms, and all of them can be used by the present invention as long as they can achieve the object of the present invention, and are all within the protection scope of the present invention.
  • the eccentricity cylinder 4 is integrally formed on the upper portion of the eccentricity ball head 2, and includes a first hollow portion 41.
  • the outer diameter of the first hollow portion 41 is larger than the through hole 21 included in the eccentricity ball head.
  • the hollow cylinder 25 includes a second hollow portion 251 and a third hollow portion 252 that communicate with each other, and the third hollow portion 252 has an outer diameter larger than the second hollow portion 251,
  • the outer wall of the hollow cylinder 25 corresponding to the second hollow portion 251 is at least partially fitted in the first hollow portion, and is sealingly coupled with the inner wall of the biasing cylinder 4, and the third hollow portion 252 is correspondingly hollow.
  • the top end of the outer wall of the cylinder is connected to a sealing pressure cap 9;
  • the outer circumferential surface of the hollow cylinder 25 is integrally formed with a first annular protrusion for limiting the length of the hollow cylinder 25 and the length of the adjustment cylinder 4 a lower surface of the first annular boss at least partially in contact with a top end of the scale-adjusting cylinder 4;
  • the light rod sequentially passes through the first hollow portion 41, the second hollow portion 251, and the third hollow Cavity 252;
  • the locking nut 5 is partially engaged on the upper surface of the first annular boss, and the locking nut 5 is also screwed to the upper end of the outer wall of the biasing cylinder 4.
  • the first centralizing ring 15 is located at the inner bottom end of the first hollow portion 41, and the first packing 19 is installed in the first hollow portion 41, and the first centralizing ring 15 and the hollow cylinder Between the kits of the body 25;
  • the second centralizing ring 16 is located at the bottom end of the third hollow portion 252;
  • the packing cap 8 is disposed at an upper end of the third hollow portion 252 to be in contact with the sealing cap 9; the second packing 26 is disposed in the third hollow portion 252, the second A packing 26 is disposed between the packing cap 8 and the second centralizing ring 16 and is pressed by the packing cap 8 and the second centralizing ring 16.
  • the packing cap 8 is a hollow cylinder, and the packing cap 8 is inserted into the hollow cylinder 25, and the specific plugging manner may be provided at the top end of the outer wall of the packing cap 8.
  • the second annular boss is in contact with the upper surface of the hollow cylinder 25, and the second annular boss is used for inserting the packing cap 8 and the hollow cylinder 25.
  • the packing cap 8 can also adopt other structures, and can be used for the present invention as long as the object of the present invention can be achieved.
  • the first packing 19 and the second packing 26 may be of a rubber structure, and the first centralizing ring 15 and the second centralizing ring 16 are used to correct the first packing 19 and the The second packing 26 prevents the packing from aging, and the first centralizing ring 15 and the second centralizing ring 16 can be made of nylon or the like.
  • the first packing 19 and the second packing 26 are arranged as an annular ring, and then the annular ring is arranged one by one to the outside of the polished rod, and layers are stacked.
  • first packing 19 and the second packing 26 may also be used according to the needs of the use. Set to a spiral packing ring for better sealing.
  • the first packing 19 in the first hollow portion 41 is loosened by the locking nut 5, so that the first packing 19 is in a standby state, and the second packing 26 is used. Sealing action, when the second packing 26 needs to be replaced, the fitting portion of the hollow cylinder 25 is pressed into the adjusting cylinder 4 by the locking nut 5, thereby pressing the first packing 19 therein, When the first packing 19 is sealed, the second packing 26 can be replaced without the need for evacuation pressure.
  • the sleeve 21 is disposed outside the polished rod; the welded joint 10 is disposed at the top end of the outer wall of the sleeve 21; the upper surface of the cap sealing cap 11 is opened, and the lower portion of the inner wall of the cap is provided Threaded, the sleeve sealing cap 11 is fitted behind the polished rod and screwed to the welded joint 10.
  • the welded pipe joint 10 is a hollow cylinder, and an upper portion of the inner wall is an inverted circular body cavity.
  • the present invention also includes a casing seal 20 disposed within the casing seal cap 11.
  • the sleeve sealing ring 20 is installed in the gap between the cup body cavity in the upper part of the welded pipe joint 10 and the sleeve 2, and is pressed by the sleeve sealing pressure cap 11 to seal The role.
  • At least a part of the double-connected card 13 is engaged with the polished rod, and at least a part of the double-connected card 13 is engaged with the welded joint 10, and the double-connected card 13 is locked by the locking device 22 and the locking device 23.
  • the polished rod and the sleeve 21 are connected by the double-connected card 13.
  • the locking device 22 and the locking device 23 are bolts and nuts that cooperate with them.
  • hexagon bolt nuts are used.
  • the diameter of the locking device 22 is smaller than the diameter of the locking device 23, the locking device 22 is four bolts and nuts of the same diameter, and the locking device 23 is two bolts and nuts of the same diameter, the welded pipe joint 10
  • the solder joint is located between any two of the locking devices 22, 23. In this way, it is ensured that the vibration of the solder joint is reduced as much as possible during the movement of the polished rod, thereby ensuring the firmness of the solder joint.
  • the solder joint of the welded pipe joint 10 is located between four smaller bolts and nuts of the same diameter.
  • the locking devices 22, 23 can also be connected by other means. The invention is not limited thereto.
  • the wellhead device further includes a wellhead connection righting ring 14, which is disposed at a lower portion of the cavity in the clamp 1.
  • the wellhead connection centering ring 14 is used to prevent the clamp 1 from being worn on the sleeve 21.
  • the first locking ring 6 is disposed on the outer wall of the adjusting cylinder 4 and is in contact with the locking nut 5; the second locking ring 7 is disposed on the outer wall of the hollow cylinder 25. In contact with the lock nut 5.
  • the oil seal 24 is disposed on the outer wall of the hollow cylinder 25 and the hollow cylinder 25 of the set portion of the scale-adjusting cylinder 4.
  • the dual-connected card 13 of the present invention further includes a dual-connected card tile 12, and the dual-connected card tile 12 is embedded on the dual-connected card 13 for engaging the polished rod.
  • the invention can be applied to the oil field mechanical oil collar or the oil pumping machine to realize the oil pumping, can prevent the oil running by the eccentric wear and the squeeze packing, and can quickly complete the packing replacement without the process emptying. Therefore, when the packing is replaced, no leakage occurs, and the work efficiency can be remarkably improved.
  • the wellhead can be kept in a sealed state after the polished rod is broken, and the blowout accident after the broken rod does not occur.
  • the sleeve of the invention is made of a corrosion-resistant and wear-resistant material, which improves the corrosion resistance and wear resistance of the polished rod.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (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)
  • Sealing Devices (AREA)
  • Earth Drilling (AREA)

Abstract

Un ensemble de tête de puits est utilisé pour coopérer avec une tige polie pour pomper du pétrole. La tige polie traverse l'ensemble de tête de puits. L'ensemble de tête de puits comprend une attache (1) comportant une cavité ; un siège en forme de bague (17) situé au-dessus de la cavité de l'attache (1) ; une bille de réglage d'excentricité (2) comportant un trou traversant vertical, la bille de réglage d'excentricité (2) étant au moins partiellement logée mobile en rotation dans le siège en forme de bague (17) ; une bague d'étanchéité (18) comportant une paroi interne arquée, montée sur la paroi externe de la bille de réglage d'excentricité (2), et le diamètre interne de la bague d'étanchéité (18) étant inférieur au diamètre externe maximal de la bille de réglage d'excentricité (2), un capuchon de serrage (3) de la bille de réglage d'excentricité (2), l'extrémité inférieure du corps de capuchon étant liée à la paroi externe de l'attache (1) par un filetage, la surface supérieure du corps de capuchon étant un cirque, et l'espace de réception de la bille de réglage d'excentricité (2) étant formé entre le capuchon de serrage (3) de la bille de réglage d'excentricité et le siège en forme de bague (17) dans l'attache (1). La tige polie traverse, tour à tour, l'attache (1), le siège en forme de bague (17), la bille de réglage d'excentricité (2), l'anneau d'étanchéité (18) et le cirque situé sur la surface supérieure du capuchon de serrage (3) de la bille de réglage d'excentricité. L'ensemble peut empêcher une usure excentrique de la tête de puits et est commode pour remplacer des garnitures d'étanchéité.
PCT/CN2008/071857 2007-09-27 2008-08-04 Ensemble de tête de puits WO2009039739A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200710113110.9 2007-09-27
CNA2007101131109A CN101122216A (zh) 2007-09-27 2007-09-27 自动调偏防腐耐磨井口密封装置

Publications (1)

Publication Number Publication Date
WO2009039739A1 true WO2009039739A1 (fr) 2009-04-02

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WO (1) WO2009039739A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107567118A (zh) * 2017-09-30 2018-01-09 江苏创拓电热科技有限公司 基于纳米膜发热管的多功能加热装置
CN108005606A (zh) * 2018-01-02 2018-05-08 陈艳来 一种无限蓄能密封装置
CN109098682A (zh) * 2018-11-12 2018-12-28 美钻深海能源科技研发（上海）有限公司 一种井口顶丝楔块台阶装置
CN109630057A (zh) * 2018-12-18 2019-04-16 克拉玛依胜利高原机械有限公司 摆动式防偏磨井口密封器
CN110005360A (zh) * 2019-03-19 2019-07-12 大庆丹诺石油科技开发有限公司 油田抽油机井口密封装置
CN110374538A (zh) * 2019-07-19 2019-10-25 中国石油天然气股份有限公司 一种采油井井口盘根盒
CN113202440A (zh) * 2021-06-04 2021-08-03 江苏金石富源机械有限公司 采油井口密封装置

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CN105971545B (zh) * 2016-07-14 2017-05-17 大庆因你美丽机械设备制造有限公司 抽油机专用光杆密封装置

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107567118A (zh) * 2017-09-30 2018-01-09 江苏创拓电热科技有限公司 基于纳米膜发热管的多功能加热装置
CN107567118B (zh) * 2017-09-30 2024-07-26 东海县安绘电热科技有限公司 基于纳米膜发热管的多功能加热装置
CN108005606A (zh) * 2018-01-02 2018-05-08 陈艳来 一种无限蓄能密封装置
CN109098682A (zh) * 2018-11-12 2018-12-28 美钻深海能源科技研发（上海）有限公司 一种井口顶丝楔块台阶装置
CN109630057A (zh) * 2018-12-18 2019-04-16 克拉玛依胜利高原机械有限公司 摆动式防偏磨井口密封器
CN110005360A (zh) * 2019-03-19 2019-07-12 大庆丹诺石油科技开发有限公司 油田抽油机井口密封装置
CN110374538A (zh) * 2019-07-19 2019-10-25 中国石油天然气股份有限公司 一种采油井井口盘根盒
CN113202440A (zh) * 2021-06-04 2021-08-03 江苏金石富源机械有限公司 采油井口密封装置
CN113202440B (zh) * 2021-06-04 2023-02-28 江苏金石富源机械有限公司 采油井口密封装置

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