CN202946065U - Fracturing releasing device - Google Patents
Fracturing releasing device Download PDFInfo
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- CN202946065U CN202946065U CN 201220670387 CN201220670387U CN202946065U CN 202946065 U CN202946065 U CN 202946065U CN 201220670387 CN201220670387 CN 201220670387 CN 201220670387 U CN201220670387 U CN 201220670387U CN 202946065 U CN202946065 U CN 202946065U
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Abstract
The utility model relates to the field of a horizontal well technology in oilfields, and relates to a fracturing releasing device. The fracturing releasing device comprises a central rod, a mechanical releasing connector, a limiting connector, a lower connector, a positioning sleeve, a claw cylinder and a piston, wherein the mechanical releasing connector comprises an upper releasing coupling drum and a lower releasing coupling drum; the inner side at the lower end of the upper releasing coupling drum is integrally connected with the outer side at the upper end of the lower releasing coupling drum, and the outer side at the lower end of the central rod and the inner side at the upper part of the lower releasing coupling drum are fixedly installed together; and the inner side at the lower end of the limiting connector and the outer side in the middle of the lower connector are fixedly installed together. The fracturing releasing device has the characteristics that the structure is reasonable and compact, the use is convenient, a releasing purpose is achieved smoothly through the cooperation of the central rod, the positioning sleeve, an annular limiting block, the claw cylinder, an elastic claw, the piston, a first shearing pin and a second shearing pin, the operation is simple, the reliability is high, the bearing capability is strong, the operation is convenient, and the working efficiency is increased.
Description
Technical field
The utility model relates to water of oil-gas field horizontal well technical field, is a kind of pressure break releasing device.
Background technology
In the construction operation of horizontal well or Multilateral Wells master, branch well hole staged fracturing, need be lowered to staged fracturing tool the different reservoir of horizontal well or Multilateral Wells master, branch well hole is carried out staged fracturing.Owing to connect working string G.I.H packer setting with common releasing tool in horizontal well after, need to propose to send into tubing string, and common releasing tool is difficult to give up smoothly, so that sends into tubing string and stay in well, thereby may cause exploitation difficulty etc.; Perhaps when Multilateral Wells was constructed, main, the complete tubing string of sending into of minute well pressure break was difficult to give up smoothly, thereby can't carry out the oil reservoir exploitation.
Summary of the invention
The utility model provides a kind of pressure break releasing device, has overcome the deficiency of above-mentioned prior art, and it can effectively solve existing apparatus and is difficult to give up smoothly and causes the exploitation difficulty maybe can't carry out the problem that oil reservoir is exploited.
the technical solution of the utility model realizes by following measures: a kind of pressure break releasing device comprises center-pole, mechanical back-off sub, positioning joint, lower contact, positioning sleeve, pawl cylinder and piston, the machinery back-off sub comprise give up extend neck and under the extend neck of giving up, on give up the lower end of extend neck inboard and under the give up outside, upper end of extend neck be connected as a single entity, the outside, lower end of center-pole and under the give up upper inner of extend neck be fixedly installed togather, inboard and the outside, middle part lower contact, the lower end of positioning joint is fixedly installed togather, under the give up bottom of extend neck be sleeved on the upper inner of lower contact and be fixed together by the first shear pin, on the extend neck of giving up be sleeved on the inboard, middle part of positioning joint, outer middle side part at center-pole is fixed with first step and second step from top to bottom successively, upper inner at positioning sleeve is fixed with the annular snap platform, lower inside at positioning sleeve has annular groove, the annular snap platform is sleeved on center-pole and is stuck on the upper surface of first step, annular groove top at positioning sleeve is equipped with the elastic clip device and is pressed on first step, the top of pawl cylinder is fixedly mounted on the annular groove bottom of positioning sleeve, be distributed with downward opening claw distinguish groove and form the elastic card claw that can inwardly shrink in the lower end of pawl cylinder outer rim, lower outside at elastic card claw is fixed with the claw boss, the top of piston is fixedly connected on second step by the second shear pin, lower inside at piston is fixed with the piston projection, the piston projection is sleeved on center-pole, second step, piston, form the chamber that builds the pressure between piston projection and center-pole, the pressure transmission hole that is connected with the chamber that builds the pressure is arranged on center-pole, upper inner at positioning joint has annular claw boss mounting groove, and the outer end of claw boss is pressed in annular claw boss mounting groove by piston.
The below is the further optimization and/or improvements to above-mentioned utility model technical scheme:
The upper outside of the annular claw boss mounting groove of above-mentioned positioning joint can be the up-small and down-big guiding conical surface, and there is the claw conical surface that matches with the guiding conical surface upper end of claw boss.
Form the mud retaining ring installation cavity between positioning sleeve above above-mentioned annular snap platform, annular snap platform and center-pole, in the mud retaining ring installation cavity, mud retaining ring can be installed.
Above-mentioned elastic clip device can comprise elasticity O type circle and at least two restraining position ring blocks; Along the flexible O type of circumference circle mounting groove, elasticity O type circle is arranged in the elasticity O type circle mounting groove of each restraining position ring block at the outer middle side part of restraining position ring block, and each restraining position ring block is combined to form ring-type and banding in the first step outside.
The above-mentioned outside, upper end at center-pole can be installed with jointing, is installed with pull bar in the upper inner of jointing, is installed with crossover sub in the outside, upper end of pull bar, under the give up lower inside of extend neck be installed with tubing nipple; The outside, upper end at positioning joint is installed with tie-back sleeve, lower outside at jointing has up-narrow and down-wide frustum, match with the tie-back sleeve inwall in the frustum outside, frustum, center-pole, under give up extend neck, on give up and form installation cavity between extend neck, positioning joint and tie-back sleeve, positioning sleeve, pawl cylinder and piston are positioned at installation cavity.
Internal thread or external screw thread can be arranged at above-mentioned top at crossover sub; In the lower end of tubing nipple, internal thread or external screw thread are arranged; In the lower end of lower contact, internal thread or external screw thread are arranged.
Can be fixedly installed togather by screw thread between above-mentioned crossover sub and pull bar; Can be fixedly installed togather by screw thread between pull bar and jointing; Can be fixedly installed togather by screw thread between jointing and center-pole; Center-pole and under give up and can be fixedly installed togather by screw thread between extend neck; Under give up and can be fixedly installed togather by screw thread between extend neck and tubing nipple; Can be fixedly installed togather by screw thread between tie-back sleeve and positioning joint; Can be fixedly installed togather by screw thread between positioning joint and lower contact; Can be fixedly installed togather by screw thread between positioning sleeve and pawl cylinder.
Between above-mentioned crossover sub and pull bar, sealing ring can be installed; Between pull bar and jointing, sealing ring can be installed; Between jointing and center-pole, sealing ring can be installed; Between second step and piston, sealing ring can be installed; Between piston projection and center-pole, sealing ring can be installed; Under give up and between extend neck and center-pole, sealing ring can be installed.
The utility model reasonable and compact in structure, easy to use, by being used in conjunction with of center-pole, positioning sleeve, restraining position ring block, pawl cylinder, elastic card claw, piston, the first shear pin and the second shear pin, the purpose that realization is given up smoothly, have characteristics simple to operate, that reliability is high and supporting capacity is strong, facilitate operation, improved operating efficiency.
Description of drawings
Accompanying drawing 1 partly cuts open structural representation for the master of the utility model most preferred embodiment looks.
Accompanying drawing 2 partly cuts open the structure for amplifying schematic diagram for the master of accompanying drawing 1 the first half looks.
Accompanying drawing 3 partly cuts open the structure for amplifying schematic diagram for the master of accompanying drawing 1 the latter half looks.
coding in accompanying drawing is respectively: 1 is crossover sub, 2 is pull bar, 3 is jointing, bar centered by 4, 5 is tubing nipple, 6 is tie-back sleeve, 7 is positioning joint, 8 are lower contact, 9 on the extend neck of giving up, 10 extend necks of giving up under being, 11 is the first shear pin, 12 is installation cavity, 13 is positioning sleeve, 14 is the pawl cylinder, 15 is piston, 16 is first step, 17 is second step, 18 is the annular snap platform, 19 is restraining position ring block, 20 is elastic card claw, 21 is the claw boss, 22 is the second shear pin, 23 is the piston projection, 24 are the chamber that builds the pressure, 25 is pressure transmission hole, 26 is mud retaining ring, 27 is sealing ring, 28 is frustum, 29 is elasticity O type circle.
The specific embodiment
The utility model is not subjected to the restriction of following embodiment, can determine concrete embodiment according to the technical solution of the utility model and actual conditions.
In the utility model, for convenience of description, the description of the relative position relation of each parts is all that the Butut mode according to Figure of description 1 is described, as: the position relationship of forward and backward, upper and lower, left and right etc. is to determine according to the Butut direction of Figure of description.
Below in conjunction with embodiment and accompanying drawing, the utility model is further described:
as shown in Figure 1, this pressure break releasing device comprises center-pole 4, mechanical back-off sub, positioning joint 7, lower contact 8, positioning sleeve 13, pawl cylinder 14 and piston 15, the machinery back-off sub comprise give up extend neck 9 and under the extend neck 10 of giving up, on give up the lower end of extend neck 9 inboard and under the give up outside, upper end of extend neck 10 be connected as a single entity, the outside, lower end of center-pole 4 and under the give up upper inner of extend neck 10 be fixedly installed togather, the inboard, lower end of positioning joint 7 and the outside, middle part of lower contact 8 are fixedly installed togather, under the give up bottom of extend neck 10 be sleeved on the upper inner of lower contact 8 and be fixed together by the first shear pin 11, on give up that to be sleeved on the middle part of positioning joint 7 inboard for extend neck 9, outer middle side part at center-pole 4 is fixed with first step 16 and second step 17 from top to bottom successively, upper inner at positioning sleeve 13 is fixed with annular snap platform 18, lower inside at positioning sleeve 13 has annular groove, annular snap platform 18 is sleeved on center-pole 4 and is stuck on the upper surface of first step 16, annular groove top at positioning sleeve 13 is equipped with the elastic clip device and is pressed on first step 13, the top of pawl cylinder 14 is fixedly mounted on the annular groove bottom of positioning sleeve 13, be distributed with downward opening claw distinguish groove and form the elastic card claw 20 that can inwardly shrink in the lower end of pawl cylinder 13 outer rim, lower outside at elastic card claw 20 is fixed with claw boss 21, the top of piston 15 is fixedly connected on second step 17 by the second shear pin 22, lower inside at piston 15 is fixed with piston projection 23, piston projection 23 is sleeved on center-pole 4, second step 17, piston 15, form the chamber 24 that builds the pressure between piston projection 23 and center-pole 4, the pressure transmission hole 25 that is connected with the chamber 24 that builds the pressure is arranged on center-pole 4, upper inner at positioning joint 7 has annular claw boss mounting groove, and the outer end of claw boss 21 is pressed in annular claw boss mounting groove by piston 15.
Can according to actual needs, above-mentioned pressure break releasing device be made further optimization and/or improvements:
As shown in accompanying drawing 1,2, the upper outside of the annular claw boss mounting groove of positioning joint 7 is the up-small and down-big guiding conical surface, and there is the claw conical surface that matches with the guiding conical surface upper end of claw boss 21.When like this, being convenient to submit tubing string, claw boss 21 breaks away from annular claw boss mounting groove.
As shown in accompanying drawing 1,2, form the mud retaining ring installation cavity between the positioning sleeve 13 of annular snap platform 18, annular snap platform 18 tops and center-pole 4, mud retaining ring 26 is installed in the mud retaining ring installation cavity.Like this, mud retaining ring 26 is convenient to filtering slurry, prevents that large particulate matter from snapping in positioning sleeve 13, restraining position ring block 19, and causes and can't give up smoothly.
As shown in Figure 2, the elastic clip device comprises elasticity O type circle 29 and at least two restraining position ring blocks 19; Along the flexible O type of circumference circle mounting groove, elasticity O type circle 29 is arranged in the elasticity O type circle mounting groove of each restraining position ring block 19 at the outer middle side part of restraining position ring block 19, and each restraining position ring block 19 is combined to form ring-type and banding in first step 16 outsides.the elastic clip device is after the pressure of spraining is given up failure, the rotation tubing string is cut off when pressing down tubing string after the first shear pin 11, tubing string drives center-pole 4 and piston 15 relative positioning covers 13, pawl cylinder 14 and restraining position ring block 19 move down, when the center-pole 4 of first step 16 tops during over against restraining position ring block 19, elasticity O type circle 29 can make restraining position ring block 19 shrink and its lower end is stuck on first step 16 upper surfaces, positioning sleeve 13 during the upper lifting pipe post again, pawl cylinder 14 and restraining position ring block 19 because of the elastic clip device with moving on center-pole 4, thereby guarantee to make piston 15 to break away from elastic card claw 20 fully, elastic card claw 20 bounces back and breaks away from the annular claw boss mounting groove of positioning joint 7, thereby realize giving up.
As shown in accompanying drawing 1,2,3, the outside, upper end at center-pole 4 is installed with jointing 3, upper inner at jointing 3 is installed with pull bar 2, is installed with crossover sub 1 in the outside, the upper end of pull bar 2, under the give up lower inside of extend neck 10 be installed with tubing nipple 5; The outside, upper end at positioning joint 7 is installed with tie-back sleeve 6, lower outside at jointing 3 has up-narrow and down-wide frustum 28, match with tie-back sleeve 6 inwalls in frustum 28 outsides, frustum 28, center-pole 4, under give up extend neck 10, on give up and form installation cavity 12 between extend neck 9, positioning joint 7 and tie-back sleeve 6, positioning sleeve 13, pawl cylinder 14 and piston 15 are positioned at installation cavity 12.
As shown in accompanying drawing 1,2,3, on the top of crossover sub 1, internal thread or external screw thread are arranged; In the lower end of tubing nipple 5, internal thread or external screw thread are arranged; In the lower end of lower contact 8, internal thread or external screw thread are arranged.Like this, be convenient to installation and removal.
As shown in accompanying drawing 1,2,3, be fixedly installed togather by screw thread between crossover sub 1 and pull bar 2; Be fixedly installed togather by screw thread between pull bar and 2 jointings 3; Be fixedly installed togather by screw thread between jointing 3 and center-pole 4; Center-pole 4 and under give up and be fixedly installed togather by screw thread between extend neck 10; Under give up and be fixedly installed togather by screw thread between extend neck 10 and tubing nipple 5; Be fixedly installed togather by screw thread between tie-back sleeve 6 and positioning joint 7; Be fixedly installed togather by screw thread between positioning joint 7 and lower contact 8; Be fixedly installed togather by screw thread between positioning sleeve 13 and pawl cylinder 14.Like this, be convenient to installation and removal.
As shown in accompanying drawing 1,2,3, between crossover sub 1 and pull bar 2, sealing ring 27 is installed; Between pull bar 2 and jointing 3, sealing ring 27 is installed; Between jointing 3 and center-pole 4, sealing ring 27 is installed; Between second step 17 and piston 15, sealing ring 27 is installed; Between piston projection 23 and center-pole 4, sealing ring 27 is installed; Under give up and between extend neck 10 and center-pole 4, sealing ring 27 be installed.Like this, sealing ring 27 is convenient to keep sealing.
Above technical characterictic has consisted of most preferred embodiment of the present utility model, and it has stronger compliance and best implementation result, can increase and decrease according to actual needs non-essential technical characterictic, satisfies the demand of different situations.
the use procedure of the utility model most preferred embodiment: during on-the-spot the use, this utility model is connected to sends on tubing string, down to the design level position, when pressing when spraining in pipe, liquid enters in the chamber 24 that builds the pressure by the pressure transmission hole 25 on center-pole 4, liquid-driving piston 15 is cut off the second shear pin 22 that connects between piston 15 and center-pole 4, piston 15 is descending and withstand on down on the upper surface of the extend neck 10 of giving up, this moment, piston 15 broke away from elastic card claw 20, then lay down pressure, on submit into tubing string, the first shear pin 11 that connects between extend neck 10 and lower contact 8 of giving up is cut off, the after-contraction that is squeezed of claw boss 21 on elastic card claw 20, propose in the annular claw boss mounting groove of positioning joint 7, except tie-back sleeve 6, outside positioning joint 7 and lower contact 8, interior tubing string all proposes, complete smoothly and give up,
the fluid pressure that builds the pressure when pressing if sprain in pipe in chamber 24 does not make the second shear pin 22 cut off, be rotated in the forward the utility model 90 degree, the first shear pin 11 that connects between extend neck 10 and lower contact 8 of giving up is cut off, then add large-tonnage and press down tubing string, crossover sub 1, pull bar 2, jointing 3, center-pole 4, on the extend neck 9 of giving up, under the extend neck 10 of giving up, tubing nipple 5 and piston 15 are descending together, coming downwards to the extend neck 9 of giving up withstands on the upper surface of lower contact 8, at this moment, piston 15 has broken away from elastic card claw 20 and restraining position ring block 19 and has moved on the center-pole 4 of first step 16 tops on relatively, restraining position ring block 19 shrinks due to the effect of elasticity O type circle 29 and is pressed on the center-pole 4 of first step 16 tops, then submit on into tubing string, restraining position ring block 19 is stuck on the upper surface of first step 16 and can not relatively moves down, the after-contraction that is squeezed of claw boss 21 on elastic card claw 20, propose in the annular claw boss mounting groove of positioning joint 7, except tie-back sleeve 6, outside positioning joint 7 and lower contact 8, interior tubing string all proposes, complete smoothly and give up.
Claims (10)
1. a pressure break releasing device, is characterized in that comprising center-pole, mechanical back-off sub, positioning joint, lower contact, positioning sleeve, pawl cylinder and piston, the machinery back-off sub comprise give up extend neck and under the extend neck of giving up, on give up the lower end of extend neck inboard and under the give up outside, upper end of extend neck be connected as a single entity, the outside, lower end of center-pole and under the give up upper inner of extend neck be fixedly installed togather, inboard and the outside, middle part lower contact, the lower end of positioning joint is fixedly installed togather, under the give up bottom of extend neck be sleeved on the upper inner of lower contact and be fixed together by the first shear pin, on the extend neck of giving up be sleeved on the inboard, middle part of positioning joint, outer middle side part at center-pole is fixed with first step and second step from top to bottom successively, upper inner at positioning sleeve is fixed with the annular snap platform, lower inside at positioning sleeve has annular groove, the annular snap platform is sleeved on center-pole and is stuck on the upper surface of first step, annular groove top at positioning sleeve is equipped with the elastic clip device and is pressed on first step, the top of pawl cylinder is fixedly mounted on the annular groove bottom of positioning sleeve, be distributed with downward opening claw distinguish groove and form the elastic card claw that can inwardly shrink in the lower end of pawl cylinder outer rim, lower outside at elastic card claw is fixed with the claw boss, the top of piston is fixedly connected on second step by the second shear pin, lower inside at piston is fixed with the piston projection, the piston projection is sleeved on center-pole, second step, piston, form the chamber that builds the pressure between piston projection and center-pole, the pressure transmission hole that is connected with the chamber that builds the pressure is arranged on center-pole, upper inner at positioning joint has annular claw boss mounting groove, and the outer end of claw boss is pressed in annular claw boss mounting groove by piston.
2. pressure break releasing device according to claim 1, the upper outside that it is characterized in that the annular claw boss mounting groove of positioning joint is the up-small and down-big guiding conical surface, there is the claw conical surface that matches with the guiding conical surface upper end of claw boss.
3. pressure break releasing device according to claim 1 and 2 is characterized in that forming the mud retaining ring installation cavity between the positioning sleeve of annular snap platform, annular snap platform top and center-pole, in the mud retaining ring installation cavity, mud retaining ring is installed.
4. pressure break releasing device according to claim 1 and 2, is characterized in that the elastic clip device comprises elasticity O type circle and at least two restraining position ring blocks; Along the flexible O type of circumference circle mounting groove, elasticity O type circle is arranged in the elasticity O type circle mounting groove of each restraining position ring block at the outer middle side part of restraining position ring block, and each restraining position ring block is combined to form ring-type and banding in the first step outside.
5. pressure break releasing device according to claim 3, is characterized in that the elastic clip device comprises elasticity O type circle and at least two restraining position ring blocks; Along the flexible O type of circumference circle mounting groove, elasticity O type circle is arranged in the elasticity O type circle mounting groove of each restraining position ring block at the outer middle side part of restraining position ring block, and each restraining position ring block is combined to form ring-type and banding in the first step outside.
6. pressure break releasing device according to claim 1 and 2, the outside, upper end that it is characterized in that center-pole is installed with jointing, upper inner at jointing is installed with pull bar, be installed with crossover sub in the outside, the upper end of pull bar, under the give up lower inside of extend neck be installed with tubing nipple; The outside, upper end at positioning joint is installed with tie-back sleeve, lower outside at jointing has up-narrow and down-wide frustum, match with the tie-back sleeve inwall in the frustum outside, frustum, center-pole, under give up extend neck, on give up and form installation cavity between extend neck, positioning joint and tie-back sleeve, positioning sleeve, pawl cylinder and piston are positioned at installation cavity.
7. pressure break releasing device according to claim 5, the outside, upper end that it is characterized in that center-pole is installed with jointing, upper inner at jointing is installed with pull bar, be installed with crossover sub in the outside, the upper end of pull bar, under the give up lower inside of extend neck be installed with tubing nipple; The outside, upper end at positioning joint is installed with tie-back sleeve, lower outside at jointing has up-narrow and down-wide frustum, match with the tie-back sleeve inwall in the frustum outside, frustum, center-pole, under give up extend neck, on give up and form installation cavity between extend neck, positioning joint and tie-back sleeve, positioning sleeve, pawl cylinder and piston are positioned at installation cavity.
8. pressure break releasing device according to claim 7, is characterized in that internal thread or external screw thread are arranged at the top of crossover sub; In the lower end of tubing nipple, internal thread or external screw thread are arranged; In the lower end of lower contact, internal thread or external screw thread are arranged.
9. pressure break releasing device according to claim 8, is characterized in that being fixedly installed togather by screw thread between crossover sub and pull bar; Be fixedly installed togather by screw thread between pull bar and jointing; Be fixedly installed togather by screw thread between jointing and center-pole; Center-pole and under give up and be fixedly installed togather by screw thread between extend neck; Under give up and be fixedly installed togather by screw thread between extend neck and tubing nipple; Be fixedly installed togather by screw thread between tie-back sleeve and positioning joint; Be fixedly installed togather by screw thread between positioning joint and lower contact; Be fixedly installed togather by screw thread between positioning sleeve and pawl cylinder.
10. pressure break releasing device according to claim 9, is characterized in that between crossover sub and pull bar, sealing ring being installed; Between pull bar and jointing, sealing ring is installed; Between jointing and center-pole, sealing ring is installed; Between second step and piston, sealing ring is installed; Between piston projection and center-pole, sealing ring is installed; Under give up and between extend neck and center-pole, sealing ring be installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220670387 CN202946065U (en) | 2012-12-07 | 2012-12-07 | Fracturing releasing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220670387 CN202946065U (en) | 2012-12-07 | 2012-12-07 | Fracturing releasing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202946065U true CN202946065U (en) | 2013-05-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220670387 Expired - Fee Related CN202946065U (en) | 2012-12-07 | 2012-12-07 | Fracturing releasing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202946065U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103790534A (en) * | 2014-02-11 | 2014-05-14 | 中国石油集团西部钻探工程有限公司 | Expansion tail pipe hanging device |
| CN105525884A (en) * | 2014-09-28 | 2016-04-27 | 中国石油化工集团公司 | Pipe column feeding tool with double releasing mechanisms |
| CN108825157A (en) * | 2018-08-23 | 2018-11-16 | 成都西部石油装备股份有限公司 | A kind of novel packer back-off sub |
| CN111927339A (en) * | 2020-09-06 | 2020-11-13 | 中国石油天然气集团有限公司 | Safety joint for staged fracturing pipe column |
| CN113802993A (en) * | 2020-06-12 | 2021-12-17 | 中国石油化工股份有限公司 | Elastic sheet type feeding tool |
-
2012
- 2012-12-07 CN CN 201220670387 patent/CN202946065U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103790534A (en) * | 2014-02-11 | 2014-05-14 | 中国石油集团西部钻探工程有限公司 | Expansion tail pipe hanging device |
| CN105525884A (en) * | 2014-09-28 | 2016-04-27 | 中国石油化工集团公司 | Pipe column feeding tool with double releasing mechanisms |
| CN105525884B (en) * | 2014-09-28 | 2017-12-19 | 中国石油化工集团公司 | A kind of tubing string running tool with double relieving mechanisms |
| CN108825157A (en) * | 2018-08-23 | 2018-11-16 | 成都西部石油装备股份有限公司 | A kind of novel packer back-off sub |
| CN113802993A (en) * | 2020-06-12 | 2021-12-17 | 中国石油化工股份有限公司 | Elastic sheet type feeding tool |
| CN111927339A (en) * | 2020-09-06 | 2020-11-13 | 中国石油天然气集团有限公司 | Safety joint for staged fracturing pipe column |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130522 Termination date: 20201207 |
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| CF01 | Termination of patent right due to non-payment of annual fee |