CN202560150U - Oil well mouth multistage back flow type blowout preventer - Google Patents
Oil well mouth multistage back flow type blowout preventer Download PDFInfo
- Publication number
- CN202560150U CN202560150U CN2012201143704U CN201220114370U CN202560150U CN 202560150 U CN202560150 U CN 202560150U CN 2012201143704 U CN2012201143704 U CN 2012201143704U CN 201220114370 U CN201220114370 U CN 201220114370U CN 202560150 U CN202560150 U CN 202560150U
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- Prior art keywords
- decompression
- flow type
- oil well
- sleeve
- pressure
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- 239000003129 oil well Substances 0.000 title claims abstract description 27
- 239000004677 Nylon Substances 0.000 claims abstract description 61
- 229920001778 nylon Polymers 0.000 claims abstract description 61
- 230000006837 decompression Effects 0.000 claims abstract description 33
- 239000000945 filler Substances 0.000 claims abstract description 17
- 238000007789 sealing Methods 0.000 claims description 37
- 239000002699 waste material Substances 0.000 claims description 13
- 238000013461 design Methods 0.000 abstract description 5
- 238000005299 abrasion Methods 0.000 abstract description 2
- 230000035515 penetration Effects 0.000 abstract 2
- 230000003405 preventing effect Effects 0.000 abstract 2
- 230000007547 defect Effects 0.000 abstract 1
- 230000002265 prevention Effects 0.000 description 14
- 230000000694 effects Effects 0.000 description 11
- 239000007788 liquid Substances 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 241001023788 Cyttus traversi Species 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 206010028347 Muscle twitching Diseases 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012549 training Methods 0.000 description 1
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Abstract
The utility model discloses an oil well mouth multistage back flow type blowout preventer which comprises a decompression assembly and a pressing cap assembly arranged above the decompression assembly. The decompression assembly comprises a decompression sleeve and a decompression nylon sleeve closely matched inside the decompression sleeve and used for penetration of a sucker rod, and decompression fillers are filled in a space between the decompression nylon sleeve and the sucker rod. The pressing cap assembly comprises a pressing cap sleeve and a pressing cap nylon column closely matched inside the pressing cap sleeve and used for penetration of the sucker rod, and the outside of the top of the decompression sleeve is connected with the inside of the bottom end of the pressing cap sleeve in a threaded mode. The oil well mouth multistage back flow type blowout preventer is simple in structure, reasonable in design, convenient to achieve, convenient and fast to install and use, good in seal and blowout preventing effect, good in deflection resistant function, energy-saving, environment-friendly, pollution-free, economical, practical, wide in the application range, and high in popularization and application value; and the oil well mouth multistage back flow type blowout preventer overcomes the defects that in the prior art, cost of a blowout preventer is high, blowout preventing effect is poor, abrasion easily occurs, pollution is easily caused, and the like.
Description
Technical field
The utility model relates to a kind of wellhead blowout preventer that is used for oilfield pumping well, especially relates to the multistage reverse-flow type blowout hookup of a kind of oil well mouth.
Background technology
Existing blowout hookup is stable sucker rod; Two ports up and down that seal blowout hookup to greatest extent are in the hope of reaching the blowout prevention effect; The result since the sucker rod surface not only or oil cylinder just do not causing along sucker rod and on fluid stagnation be accumulated in the port edge, finally overflow to blowout hookup outside and pollute.
Existing blowout hookup is an one-level blowout prevention structure, sealing to greatest extent between two ports and the sucker rod up and down, and the result is under the oil pumper great force; Cause heavy wear between sucker rod and the blowout hookup; Reducing or lose the blowout prevention effect, set upright or the direction tumbler though some blowout hookup has installed additional, also is that effect is limited; Cost is high, weak effect.Production practices prove, make sucker rod be in metastable state, and are unfavorable for the blowout prevention regulation effect, along sucker rod and on liquid narrow and small because of port; Be prone to make sucker rod scratch port, accumulation forms overflow and pollutes, and haves no alternative but to select other blowout hookup else, selects repeatedly; Change repeatedly, factory has high input, and it is high that the workman changes blowout hookup labour intensity; Blowout prevention weak effect, problem can not get solving, and become the ubiquitous problem of oil recovery factory, various places oil recovery process.
The utility model content
The utility model technical problem to be solved is to provide a kind of oil well mouth multistage reverse-flow type blowout hookup to above-mentioned deficiency of the prior art, and it is simple in structure; Reasonable in design, it is convenient to realize, it is convenient to install and use; The sealing blowout prevention is effective, anti-deflection better function, and energy-conserving and environment-protective are pollution-free; Economical and practical, applied widely, application value is high.
For solving the problems of the technologies described above; The technical scheme that the utility model adopts is: the multistage reverse-flow type blowout hookup of a kind of oil well mouth; It is characterized in that: comprise pressure relief assembly and the pressure cap assembly that is arranged on said pressure relief assembly top; Said pressure relief assembly comprises pressure reducing sleeve and to fit snugly in said pressure reducing sleeve inner and be used to the decompression nylon jacket that supplies sucker rod to pass; Be filled with the decompression filler in the space between said decompression nylon jacket and the said sucker rod; Said pressure cap assembly comprises the pressure cap sleeve pipe and fits snugly in said pressure cap inside pipe casing and be used to the pressure cap nylon column that supplies sucker rod to pass that the tip exterior of said pressure reducing sleeve is connected with the bottom internal whorl of said pressure cap sleeve pipe.
The multistage reverse-flow type blowout hookup of above-mentioned oil well mouth; It is characterized in that: also comprise the black box that is arranged between said pressure relief assembly and the pressure cap assembly; Said black box comprises Sealed casing pipe and the sealing nylon column and sealing nylon jacket that fit snugly in said Sealed casing pipe inside and be used to supply sucker rod to pass; Said sealing nylon column is arranged on the position of Sealed casing pipe inside near said pressure relief assembly; Said sealing nylon jacket is arranged on the position of Sealed casing pipe inside near said pressure cap assembly; Be filled with airtight and watertight padding in the space between said sealing nylon jacket and the said sucker rod, the tip exterior of said pressure reducing sleeve is connected with the bottom internal whorl of said Sealed casing pipe, and the tip exterior of said Sealed casing pipe is connected with the bottom internal whorl of said pressure cap sleeve pipe.
The multistage reverse-flow type blowout hookup of above-mentioned oil well mouth is characterized in that: the quantity of said black box is one or more, and the tip exterior of N said Sealed casing pipe is connected with the bottom internal whorl of N+1 said Sealed casing pipe, and wherein N is a natural number.
The multistage reverse-flow type blowout hookup of above-mentioned oil well mouth; It is characterized in that: the outline of said pressure reducing sleeve bottom and the interior profile at said pressure cap sleeve pipe top are round table-like, and the bottom of said pressure reducing sleeve is provided with and is used for the external screw thread that is connected with the well head casing threads.
The multistage reverse-flow type blowout hookup of above-mentioned oil well mouth is characterized in that: the interior profile of said decompression nylon jacket is for round table-like.
The multistage reverse-flow type blowout hookup of above-mentioned oil well mouth is characterized in that: the interior profile of said sealing nylon jacket is for round table-like.
The multistage reverse-flow type blowout hookup of above-mentioned oil well mouth is characterized in that: being shaped as of said pressure cap nylon column longitudinal section " T " font.
The multistage reverse-flow type blowout hookup of above-mentioned oil well mouth is characterized in that: being shaped as of said sealing nylon column longitudinal section " T " font.
The multistage reverse-flow type blowout hookup of above-mentioned oil well mouth is characterized in that: said decompression filler is entwined by waste and old V-belt.
The multistage reverse-flow type blowout hookup of above-mentioned oil well mouth, it is characterized in that: said airtight and watertight padding is entwined by waste and old V-belt.
The utility model compared with prior art has the following advantages:
1, the utility model is to sealing difficulty because of high pressure deflection oil pumper; Serious and a kind of simple, efficient, the economic, practical wellhead blowout preventer of development and Design of sucker rod surface abrasion; Adopted the pressure relief assembly, black box and the pressure cap assembly that are threaded each other to constitute; Simple in structure, reasonable in design, it is convenient to realize.
2, the utility model is installed simple and convenient and the conventional mounting maintenance, is safeguarded few of difference, need not the workman is carried out special training, can be from line operate.
3, the utility model can fundamentally change the severe contamination problem that existing wellhead blowout preventer weak effect is caused; Sealing performance is greatly improved because of its black box is incremental; Realized the absolutization of sealing effectiveness, anti-deflection function becomes simply because of having installed decompression nylon jacket, sealing nylon column, sealing nylon jacket and pressure cap nylon column additional, and is wear-resisting; Practicality, efficient.
4, decompression filler and airtight and watertight padding are entwined by waste and old V-belt in the utility model; Twice laid is remarkably productive, is the environmental protection and saving property behave that kills two birds with one stone, and is economical and practical, effective than the typing filler of traditional market buying; It is all very convenient to insert taking-up, has reduced cost.
5, the quantity of black box can be selected according to every mouthful of gas well gas hydraulic coupling flexible in size in the utility model, flexible and convenient to use and make the blowout prevention expense become specifically, rationally, do not have and waste.
6, the utility model is practical, applied widely, is applicable to all rod beam-pumping units, and application value is high.
In sum, the utility model is simple in structure, and is reasonable in design; It is convenient to realize, it is convenient to install and use, and the sealing blowout prevention is effective; Anti-deflection better function, energy-conserving and environment-protective are pollution-free, and are economical and practical; Applied widely, application value is high, solved the existing cost height of blowout hookup of the prior art, blowout prevention weak effect, easy to wear, defective and deficiency such as pollute easily.
Through accompanying drawing and embodiment, the technical scheme of the utility model is done further detailed description below.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment 1.
Fig. 2 is the structural representation of the utility model embodiment 2.
Fig. 3 is the structural representation of the utility model embodiment 3.
Description of reference numerals:
1-1-pressure reducing sleeve; 1-2-decompression nylon jacket; 1-3-decompression filler;
1-4-external screw thread; 2-1-pressure cap sleeve pipe; 2-2-pressure cap nylon column;
3-1-Sealed casing pipe; 3-2-sealing nylon column; 3-3-sealing nylon jacket;
3-4-airtight and watertight padding; 4-sucker rod.
The specific embodiment
Embodiment 1
As shown in Figure 1; The utility model comprises pressure relief assembly and the pressure cap assembly that is arranged on said pressure relief assembly top; Said pressure relief assembly comprises pressure reducing sleeve 1-1 and to fit snugly in said pressure reducing sleeve 1-1 inner and be used to the decompression nylon jacket 1-2 that supplies sucker rod 4 to pass; Be filled with decompression filler 1-3 in the space between said decompression nylon jacket 1-2 and the said sucker rod 4; Said pressure cap assembly comprises pressure cap sleeve pipe 2-1 and to fit snugly in said pressure cap sleeve pipe 2-1 inner and be used to the pressure cap nylon column 2-2 that supplies sucker rod 4 to pass, and the tip exterior of said pressure reducing sleeve 1-1 is connected with the bottom internal whorl of said pressure cap sleeve pipe 2-1.
In the present embodiment, the outline of said pressure reducing sleeve 1-1 bottom and the interior profile at said pressure cap sleeve pipe 2-1 top are round table-like, and the bottom of said pressure reducing sleeve 1-1 is provided with and is used for the external screw thread 1-4 that is connected with the well head casing threads.The interior profile of said decompression nylon jacket 1-2 is for round table-like.Being shaped as of said pressure cap nylon column 2-2 longitudinal section " T " font.Said decompression filler 1-3 is entwined by waste and old V-belt.
Embodiment 2
In conjunction with Fig. 2; What present embodiment and embodiment 1 were different is: also comprise the black box that is arranged between said pressure relief assembly and the pressure cap assembly; Said black box comprises Sealed casing pipe 3-1 and the sealing nylon column 3-2 and sealing nylon jacket 3-3 that fit snugly in said Sealed casing pipe 3-1 inside and be used to supply sucker rod 4 to pass; Said sealing nylon column 3-2 is arranged on the position of Sealed casing pipe 3-1 inside near said pressure relief assembly; Said sealing nylon jacket 3-3 is arranged on the position of Sealed casing pipe 3-1 inside near said pressure cap assembly; Be filled with airtight and watertight padding 3-4 in the space between said sealing nylon jacket 3-3 and the said sucker rod 4; The tip exterior of said pressure reducing sleeve 1-1 is connected with the bottom internal whorl of said Sealed casing pipe 3-1, and the tip exterior of said Sealed casing pipe 3-1 is connected with the bottom internal whorl of said pressure cap sleeve pipe 2-1.The quantity of said black box is one.The interior profile of said sealing nylon jacket 3-3 is for round table-like.Being shaped as of said sealing nylon column 3-2 longitudinal section " T " font.Said airtight and watertight padding 3-4 is entwined by waste and old V-belt.All the other structures are all identical with embodiment 1.
Embodiment 3
In conjunction with Fig. 3, what present embodiment and embodiment 2 were different is: the quantity of said black box is a plurality of, and the tip exterior of N said Sealed casing pipe 3-1 is connected with the bottom internal whorl of the individual said Sealed casing pipe 3-1 of N+1, and wherein N is a natural number.All the other structures are all identical with embodiment 2.
Because the utility model has adopted the fabricated structure mode of pressure relief assembly, black box and pressure cap assembly, therefore, when using this blowout hookup; Also can be according to every mouthful of gas well gas hydraulic coupling size; Select flexibly the quantity of black box, till reaching satisfied blowout prevention effect, fully in order to be effective; Need not to change, make the blowout prevention expense become specifically, rationally, do not have and waste.
In the utility model; The interior profile of the outline of pressure reducing sleeve 1-1 bottom, the interior profile at pressure cap sleeve pipe 2-1 top, decompression nylon jacket 1-2 and the interior profile of sealing nylon jacket 3-3 are round table-like; Make that two ports up and down of this blowout hookup are open to greatest extent; But also the closely cooperating of help reducing pressure 4 of filler 1-3 and airtight and watertight padding 3-4 and sucker rods; Make along sucker rod 4 and on the liquid compensation difficulty of coming up easily of going down, forms and a kind ofly borrows sucker rod 4 rocking naturally in twitching up and down to make liquid be back to the interior reverse-flow type working method of well, so make the no liquid stop all the time of this blowout hookup port; Fundamentally play the effect of blowout prevention leakproof, the clean noresidue liquid of well head is overflowed.
Be used in the utility model to supply sucker rod 4 passes for decompression nylon jacket 1-2, sealing nylon column 3-2, sealing nylon jacket 3-3 and pressure cap nylon column 2-2 all again nylon material constitute; Wear-resisting, withstand voltage, corrosion resistant characteristics that nylon has; Can effectively prevent between pressure reducing sleeve 1-1, Sealed casing pipe 3-1 and the pressure cap sleeve pipe 2-1 of sucker rod 4 and this blowout hookup eccentric wear to take place, anti-eccentric wear cost is low and effective.
Decompression filler 1-3 and airtight and watertight padding 3-4 are entwined by waste and old V-belt in the utility model, and twice laid is remarkably productive, is the environmental protection and saving property behave that kills two birds with one stone; Typing filler than the traditional market buying is economical and practical, effective; Only need on sucker rod 4, tightly twine waste and old V-belt when inserting, squeeze in the inner chamber of decompression nylon jacket 1-2 with hammer then or in the inner chamber of sealing nylon jacket 3-3, only need provoke one of top during taking-up; Can extract out and more to renew; It is all very convenient to insert taking-up, is a kind of environmental protection and saving property filler that is worthy to be popularized, and this product structure is scientific and reasonable; Easy for installation simple, use this product can effectively solve the difficult problem of well head blowout prevention difficulty, weak effect.
The method for using of the utility model is following:
1, closes down oil pumper, treat that well head pressure reduces to zero and no liquid when overflowing, lay down original discarded blowout hookup, the bottom of pressure reducing sleeve 1-1 in the utility model pressure relief assembly is connected with the well head casing threads; Well-digging newly in this way, then direct bottom with pressure reducing sleeve 1-1 in the utility model pressure relief assembly is connected with the well head casing threads;
2, on the sucker rod above the pressure relief assembly 4, tightly twine two-layer formation decompression filler 1-3 with the waste and old V-belt of preprepared; The height of decompression filler 1-3 matches with the interior profile height of decompression nylon jacket 1-2, with hammer or by other easily the instrument filler 1-3 that will reduce pressure squeeze in the inner chamber of the nylon jacket 1-2 that reduces pressure;
3, the pressure cap assembly is placed on the top of pressure relief assembly and pressure cap sleeve pipe 2-1 is threaded with pressure reducing sleeve 1-1, tighten with pipe wrench;
4, connect the horse head wire rope of oil pumper, oil pumper gets into normal operating conditions; Start oil pumper power supply trial run oil pumper, see the whether leakage of oil of the blowout hookup that constitutes by pressure relief assembly and pressure cap assembly, tighten the pressure cap assembly gradually, till not leaking, get into normal blowout prevention state.
If 5 pressure cap assemblies are transferred to minimum also in leakage of oil; Then need turn off the oil pumper power supply; Oil pumper is out of service, lays down the pressure cap assembly then, and ready black box is placed on the top of pressure relief assembly and Sealed casing pipe 3-1 is threaded with pressure reducing sleeve 1-1;
6, on the sucker rod above the black box 4, tightly twine two-layer formation airtight and watertight padding 3-4 with the waste and old V-belt of preprepared; The height of airtight and watertight padding 3-4 matches with the interior profile height of sealing nylon jacket 3-3, with hammer or by other easily instrument airtight and watertight padding 3-4 is squeezed in the inner chamber of sealing nylon jacket 3-3;
7, the pressure cap assembly is placed on the top of black box and pressure cap sleeve pipe 2-1 is threaded with Sealed casing pipe 3-1, tighten with pipe wrench, good pumping unit horsehead rope to be connected back starts oil pumper debugs, till oil-proof.
8, the black box screw thread that will add up is screwed to the limit, if still have oil leakage phenomenon then continue to increase black box, debugs so repeatedly until till do not have leakage of oil; Oil pumper just can get into normal operating conditions.
The above; It only is the preferred embodiment of the utility model; Be not that the utility model is done any restriction; Everyly any simple modification that above embodiment did, change and equivalent structure are changed, all still belong in the protection domain of the utility model technical scheme according to the utility model technical spirit.
Claims (10)
1. multistage reverse-flow type blowout hookup of oil well mouth; It is characterized in that: comprise pressure relief assembly and the pressure cap assembly that is arranged on said pressure relief assembly top; Said pressure relief assembly comprises pressure reducing sleeve (1-1) and fits snugly in said pressure reducing sleeve (1-1) inner and be used to the decompression nylon jacket (1-2) that supplies sucker rod (4) to pass; Be filled with decompression filler (1-3) in the space between said decompression nylon jacket (1-2) and the said sucker rod (4); Said pressure cap assembly comprises pressure cap sleeve pipe (2-1) and fits snugly in said pressure cap sleeve pipe (2-1) inner and be used to the pressure cap nylon column (2-2) that supplies sucker rod (4) to pass, and the tip exterior of said pressure reducing sleeve (1-1) is connected with the bottom internal whorl of said pressure cap sleeve pipe (2-1).
2. according to the multistage reverse-flow type blowout hookup of the described oil well mouth of claim 1; It is characterized in that: also comprise the black box that is arranged between said pressure relief assembly and the pressure cap assembly; Sealing nylon column (3-2) and sealing nylon jacket (3-3) that said black box comprises Sealed casing pipe (3-1) and fits snugly in said Sealed casing pipe (3-1) inside and be used to supply sucker rod (4) to pass; Said sealing nylon column (3-2) is arranged on the inner position near said pressure relief assembly of Sealed casing pipe (3-1); Said sealing nylon jacket (3-3) is arranged on the inner position near said pressure cap assembly of Sealed casing pipe (3-1); Be filled with airtight and watertight padding (3-4) in the space between said sealing nylon jacket (3-3) and the said sucker rod (4); The tip exterior of said pressure reducing sleeve (1-1) is connected with the bottom internal whorl of said Sealed casing pipe (3-1), and the tip exterior of said Sealed casing pipe (3-1) is connected with the bottom internal whorl of said pressure cap sleeve pipe (2-1).
3. according to the multistage reverse-flow type blowout hookup of the described oil well mouth of claim 2; It is characterized in that: the quantity of said black box is one or more; The tip exterior of N said Sealed casing pipe (3-1) is connected with the bottom internal whorl of N+1 said Sealed casing pipe (3-1), and wherein N is a natural number.
4. according to claim 1, the multistage reverse-flow type blowout hookup of 2 or 3 described oil well mouths; It is characterized in that: the outline of said pressure reducing sleeve (1-1) bottom and the interior profile at said pressure cap sleeve pipe (2-1) top are round table-like, and the bottom of said pressure reducing sleeve (1-1) is provided with and is used for the external screw thread (1-4) that is connected with the well head casing threads.
5. according to claim 1, the multistage reverse-flow type blowout hookup of 2 or 3 described oil well mouths, it is characterized in that: the interior profile of said decompression nylon jacket (1-2) is for round table-like.
6. according to claim 2 or the multistage reverse-flow type blowout hookup of 3 described oil well mouths, it is characterized in that: the interior profile of said sealing nylon jacket (3-3) is for round table-like.
7. according to claim 1, the multistage reverse-flow type blowout hookup of 2 or 3 described oil well mouths, it is characterized in that: said pressure cap nylon column (2-2) longitudinal section be shaped as " T " font.
8. according to claim 2 or the multistage reverse-flow type blowout hookup of 3 described oil well mouths, it is characterized in that: said sealing nylon column (3-2) longitudinal section be shaped as " T " font.
9. according to claim 1, the multistage reverse-flow type blowout hookup of 2 or 3 described oil well mouths, it is characterized in that: said decompression filler (1-3) is entwined by waste and old V-belt.
10. according to claim 2 or the multistage reverse-flow type blowout hookup of 3 described oil well mouths, it is characterized in that: said airtight and watertight padding (3-4) is entwined by waste and old V-belt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201143704U CN202560150U (en) | 2012-03-23 | 2012-03-23 | Oil well mouth multistage back flow type blowout preventer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201143704U CN202560150U (en) | 2012-03-23 | 2012-03-23 | Oil well mouth multistage back flow type blowout preventer |
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| Publication Number | Publication Date |
|---|---|
| CN202560150U true CN202560150U (en) | 2012-11-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201143704U Expired - Fee Related CN202560150U (en) | 2012-03-23 | 2012-03-23 | Oil well mouth multistage back flow type blowout preventer |
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| Country | Link |
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| CN (1) | CN202560150U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106761526A (en) * | 2016-12-30 | 2017-05-31 | 天津中车机辆装备有限公司 | Steel wire rope pumping return channel |
| CN110301073A (en) * | 2017-02-08 | 2019-10-01 | 丰田自动车株式会社 | Connector construction |
| CN111058791A (en) * | 2019-12-18 | 2020-04-24 | 西安狮龙石油设备监理技术有限公司 | Oil well wellhead blowout preventer and system |
-
2012
- 2012-03-23 CN CN2012201143704U patent/CN202560150U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106761526A (en) * | 2016-12-30 | 2017-05-31 | 天津中车机辆装备有限公司 | Steel wire rope pumping return channel |
| CN110301073A (en) * | 2017-02-08 | 2019-10-01 | 丰田自动车株式会社 | Connector construction |
| US10897102B2 (en) | 2017-02-08 | 2021-01-19 | Toyota Jidosha Kabushiki Kaisha | Connector structure |
| CN110301073B (en) * | 2017-02-08 | 2021-06-08 | 丰田自动车株式会社 | Connector structure |
| CN111058791A (en) * | 2019-12-18 | 2020-04-24 | 西安狮龙石油设备监理技术有限公司 | Oil well wellhead blowout preventer and system |
| CN111058791B (en) * | 2019-12-18 | 2022-03-22 | 西安狮龙石油设备监理技术有限公司 | Oil well wellhead blowout preventer and system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Yan'an Petroleum Machineary Co., Ltd. Assignor: Ai Zhongzhong Contract record no.: 2015610000057 Denomination of utility model: Oil well mouth multistage back flow type blowout preventer Granted publication date: 20121128 License type: Exclusive License Record date: 20150528 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121128 Termination date: 20160323 |