CN109267959A - The ram preventer and its blowout prevention method of position holding function is automatically closed in a kind of band - Google Patents
The ram preventer and its blowout prevention method of position holding function is automatically closed in a kind of band Download PDFInfo
- Publication number
- CN109267959A CN109267959A CN201811447465.6A CN201811447465A CN109267959A CN 109267959 A CN109267959 A CN 109267959A CN 201811447465 A CN201811447465 A CN 201811447465A CN 109267959 A CN109267959 A CN 109267959A
- Authority
- CN
- China
- Prior art keywords
- pressure
- chamber
- preventer
- oil
- ram
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/06—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers
- E21B33/061—Ram-type blow-out preventers, e.g. with pivoting rams
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/02—Valve arrangements for boreholes or wells in well heads
Abstract
The present invention provides a kind of band and the ram preventer that position keeps function is automatically closed, and for preventing blowout, include: ram blowout preventer body connect with well head, the opening and closing mouth of preventer respectively with the connection of the corresponding hydraulic fluid port of control system of preventer；Two identical hydraulic control one-way valves, two identical pressure conduction devices, connect with the ram blowout preventer body.Hydraulic control one-way valve utilize Unidirectional flow-limiting function, by with opening and closing mouth oil communication, realize that the switch of ram of ram preventer and ram preventer close stance are automatically kept；Pressure conduction device closes chamber by the way that wellbore annulus pressure to be conducted to the flashboard of ram preventer, realizes that ram preventer close stance is automatically kept.The invention also includes the blowout prevention methods of the preventer.Ram preventer of the invention can automatically keep well head flashboard and be in close stance, prevent blowout, be not necessarily to human intervention, have good promotional value in the case where preventer is closed hydraulic pressure and lost.
Description
Technical field
The present invention relates to oil and gas well drilling and oil recovery safety means technical field, specifically a kind of band close stance is automatic
Keep the ram preventer of function.
Background technique
Ram preventer, is one of the key equipment of drilling equipment in industrial gas oil, and main function is in oil
Completion practice, workover treatment and the lower oil tube operation in field, oil recovery in During Oil Testing Process, prevent stratum high pressure gas band crude oil and water
Well kick and blowout are formed, is a kind of safety sealing device for preventing well kick, blowout for being mounted on well head.
Existing ram preventer generallys use locking device (including manual locking bar, hydraulic locking apparatus etc.) to blowout prevention
Device is locked when closing, to keep preventer to be constantly in closed state.In this case, forget pair if there is artificial
Ram preventer locking device carries out locking operation, is exactly that ram preventer closed state is possible to there are a very big risk
Can fail (such as decline of hydraulic oil source pressure, hydraulic oil pipeline leakage), at this time if wellbore pressure increases, it is most likely that cause
Flashboard is opened by wellbore pressure, and ram preventer shut-in well action deprivation, causes the major accidents such as blowout therewith.
Summary of the invention
The ram preventer that position keeps function is automatically closed in band of the invention, can replace traditional ram preventer locking
Device keeps flashboard closed state.Forget that locking ram preventer or oil well on-off control system pipeline lets out in human factor
When leakage causes locking to be failed, prevent serious gas blowout accident.
In order to achieve the above object, the present invention provides a kind of bands, and the ram preventer that position keeps function is automatically closed, even
It connects on well mouth of oil well, and connects the opening of control system of preventer and close mouth for preventing well kick blowout and include: lock
Plate blowout preventer body, and connect with the ram blowout preventer body two identical hydraulic control one-way valves, two complete phases
Same pressure conduction device；
The ram blowout preventer body includes: wellbore pressure chamber is connected to well head, transmits oil well well liquid pressure；Two complete
Exactly the same plunger shaft is symmetricly set on wellbore pressure chamber both ends, and insulates with wellbore pressure chamber；
Piston is equipped in the plunger shaft, the piston first end is located in plunger shaft, and chamber is closed in plunger shaft packing
With unlatching chamber；The unlatching chamber is adjacent with wellbore pressure chamber；Piston second end is connected with flashboard；The flashboard is located at wellbore pressure
It is intracavitary, for closing well head；Open chamber and opening oil circuit connection；It closes chamber and closes mouth oil circuit connection；
A hydraulic control one-way valve is equipped between the closing chamber and closing mouth；The hydraulic control one-way valve oil circuit connection closes chamber
With closing mouth, guarantee that hydraulic oil can only flow into closing chamber from mouth is closed；Hydraulic control one-way valve closes oil well by Unidirectional flow-limiting function
And it prevents from closing chamber hydraulic oil return control system；Hydraulic control one-way valve also passes through Unidirectional flow-limiting function and realizes that flashboard close stance is automatic
It keeps；
It is equipped with a pressure conduction device between the closing chamber and wellbore pressure chamber, is set inside the pressure conduction device
Proportional piston insulates pressure conduction device for pressure input cavity and pressure output chamber；The pressure input cavity and pit shaft pressure
The connection of power chamber, the pressure output chamber and closing chamber oil circuit connection；Pressure conduction device is realized by pressure conduction function and is closed
Chamber remains pressure state, to realize that close stance is automatically kept.
The hydraulic control one-way valve also pass through Unidirectional flow-limiting function close oil well, in particular to, close mouth hydraulic oil flow into
Chamber is closed, cavity pressure is closed and increases, pushes piston driving flashboard mobile to wellbore centre, opens intracavitary hydraulic oil from unlatching
Mouth flows back to control system of preventer fuel tank, and the flashboard pairing of both ends blowout hookup is realized and closes well head.
The hydraulic control one-way valve also pass through Unidirectional flow-limiting function realize flashboard close stance automatically keep, in particular to, due to
The Unidirectional flow-limiting function of hydraulic control one-way valve, that is, turn off a mouthful fuel cut-off, and the hydraulic oil for closing chamber can not be voluntarily along former tubes rows
Out, it remains turned-off intracavitary closing pressure and is in effective status, piston does not move, to realize the closed position of flashboard certainly
It is dynamic to keep.
Pressure conduction device by pressure conduction function realize flashboard close stance automatically keep, in particular to, when pit shaft pressure
When power rises, well liquid enters pressure input cavity in pit shaft, by the proportional piston of pressure conduction device, by the pressure of pressure input cavity
Conducting pressure output cavity, proportional piston turn off intracavitary pressure while rising power to the movement of pressure output chamber one end in proportion,
The closing pressure for remaining turned-off chamber is in effective status, to realize that the closed position of flashboard is automatically kept.
The hydraulic control one-way valve is additionally provided with pilot control hydraulic fluid port, with unlatching chamber oil circuit connection；When opening well head, opening
Hydraulic oil enters unlatching chamber, opens cavity pressure and increases, the hydraulic oil for opening chamber oil enters hydraulic control one-way valve, by hydraulic control one-way valve
It opens, hydraulic control one-way valve loses Unidirectional flow-limiting function, and the hydraulic oil for closing chamber flows into control system of preventer fuel tank；Piston is to remote
The mobile unlatching well head in direction from wellbore centre.
Well head is located at wellbore pressure chamber center.
The blowout prevention method that position keeps the ram preventer of function is automatically closed in a kind of band, anti-using flashboard of the present invention
Spray apparatus is realized, comprising the steps of:
When S1, closing well mouth of oil well, the closing mouth of control system of preventer is opened, hydraulic oil is input to closing from mouth is closed
Chamber is closed intracavitary hydraulic fluid pressure and is increased, and piston driving flashboard is mobile to wellbore pressure chamber, closes well head；Close confession oil event
When barrier, into S2；When wellbore pressure rises, into S3；
S2, it is acted on by the one-way conduction of check valve, the hydraulic oil for closing chamber can not close countercurrently to control system of preventer
Hydraulic fluid pressure is constant in closed chamber, realizes that the closed position of flashboard is automatically kept, oil well remains turned-off；
S3, downhole well fluid pressure by pressure conduction device conduct to close chamber, simultaneously close off the hydraulic oil pressure of chamber
Power rises, and greater than pressure needed for closing oil well, realizes that the closed position of flashboard is automatically kept, oil well remains turned-off.
Ram preventer of the invention turns off chamber hydraulic oil non-by closing chamber oil inlet setting hydraulic control one-way valve
It will not be back to control system of preventer under artificiality, remain turned-off cavity pressure；And it is arranged one closing between chamber and pit shaft
A pressure conduction device turns off cavity pressure and follows well buckling, remains that closing chamber oil pressure is in effective closed state,
Realize that the flashboard close stance of ram preventer is automatically kept.Compared with prior art, the present invention is not necessarily to human intervention and control, from
It is dynamic to prevent gas blowout accident, prevent security risk.
Detailed description of the invention
In order to illustrate more clearly of technical solution of the present invention, attached drawing needed in description will be made simply below
It introduces, it should be apparent that, the accompanying drawings in the following description is one embodiment of the present of invention, and those of ordinary skill in the art are come
It says, without creative efforts, is also possible to obtain other drawings based on these drawings:
Fig. 1 is the structure chart of ram preventer of the invention；
Fig. 2 is the structure chart of pressure conduction device of the invention.
In figure: 1, wellbore pressure chamber；2, piston；3, chamber is opened；4, chamber is closed；5, hydraulic control one-way valve；6, pressure conduction fills
It sets；7, proportional piston；8, flashboard；9, oil well；10, pilot control hydraulic fluid port；11, pressure input cavity；12, pressure output chamber.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in Figure 1, the present invention provides a kind of bands, and the ram preventer that position keeps function is automatically closed, it is connected to oil well
On well head, and connects the opening of control system of preventer and close mouth for preventing well kick blowout and include: ram preventer
Ontology, and two identical hydraulic control one-way valves, 5, the two identical pressure being connect with the ram blowout preventer body
Conduction device 6.
The ram blowout preventer body includes: wellbore pressure chamber 1 is connected to well head, transmits oil well well liquid pressure, well head position
In 1 center of wellbore pressure chamber；Two identical plunger shafts are symmetricly set on 1 both ends of wellbore pressure chamber, and and pit shaft
Pressure chamber 1 insulates；
Piston 2 is equipped in the plunger shaft, 2 first end of piston is located in plunger shaft, and plunger shaft packing is closed
Chamber 4 and unlatching chamber 3；The unlatching chamber 3 is adjacent with wellbore pressure chamber 1；2 second end of piston is connected with flashboard 8；8, the flashboard
In in wellbore pressure chamber 1, for closing well head；Open chamber 3 and opening oil circuit connection；It closes chamber 4 and closes mouth oil circuit connection；
A hydraulic control one-way valve 5 is equipped between the closing chamber 4 and closing mouth；5 oil circuit connection of hydraulic control one-way valve is closed
Closed chamber 4 and closing mouth guarantee that hydraulic oil can only close chamber 4 from mouth inflow is closed；Hydraulic control one-way valve 5 is closed by Unidirectional flow-limiting function
Oil well 9 is closed, and prevents from closing 3 hydraulic oil of chamber return control system；Hydraulic control one-way valve 5 also realizes flashboard by Unidirectional flow-limiting function
8 close stances are automatically kept；
The hydraulic control one-way valve 5 by Unidirectional flow-limiting function close oil well 9, in particular to, close mouth hydraulic oil flow into
Chamber 4 is closed, pressure in chamber 4 is closed and increases, push piston 2 to drive flashboard 8 mobile to wellbore centre, open the hydraulic oil in chamber 3
Control system of preventer is flowed back to from opening, 8 pairing of flashboard of both ends blowout hookup is realized and closes well head.
The hydraulic control one-way valve 5 also by Unidirectional flow-limiting function realize 8 close stance of flashboard automatically keep, in particular to, by
In the Unidirectional flow-limiting function of hydraulic control one-way valve 5, that is, a mouthful fuel cut-off is turned off, the hydraulic oil for closing chamber 4 can not be managed voluntarily along original
Road discharge, the closing pressure remained turned-off in chamber 4 are in effective status, and piston 2 does not move, to realize the pass of flashboard 8
Closed position is automatically kept.
The hydraulic control one-way valve 5 is additionally provided with pilot control hydraulic fluid port 10, with unlatching 3 oil circuit connection of chamber；When opening well head, open
The hydraulic oil of mouth enters from pilot control hydraulic fluid port 10 opens chamber 3, opens pressure in chamber 3 and increases, and the hydraulic oil of 3 oil of unlatching chamber enters
Hydraulic control one-way valve 5 opens hydraulic control one-way valve 5, and hydraulic control one-way valve 5 loses Unidirectional flow-limiting function, and the hydraulic oil for closing chamber 4 flows into
Control system of preventer fuel tank；Piston 2 opens well head to the direction far from wellbore centre is mobile.
A pressure conduction device 6 is equipped between the closing chamber 4 and wellbore pressure chamber 1, as shown in Fig. 2, the pressure
It is equipped with proportional piston 7 inside conduction device 6, pressure conduction device 6 is insulated as pressure input cavity 11 and pressure output chamber 12；Institute
It states pressure input cavity 11 to connect with wellbore pressure chamber 1, the pressure output chamber 12 and closing 4 oil circuit connection of chamber；Pressure conduction dress
It sets 6 and realizes that closing chamber 4 remains pressure state by pressure conduction function, to realize that 8 close stance of flashboard is automatically kept.
The pressure conduction device 6 by pressure conduction function realize 8 close stance of flashboard automatically keep, in particular to, when
When wellbore pressure rises, well liquid enters pressure input cavity 11 in pit shaft, by the proportional piston 7 of pressure conduction device 6, by pressure
Conducting pressure output cavity 12, proportional piston 7 turn off chamber to the movement of 12 one end of pressure output chamber to the pressure of input cavity 11 in proportion
4 pressure rises simultaneously, and the closing pressure for remaining turned-off chamber 4 is in effective status, to realize that the closed position of flashboard 8 is automatic
It keeps.
The blowout prevention method that position keeps the ram preventer of function is automatically closed in a kind of band, is automatically closed using band of the invention
Position keeps the ram preventer of function to realize, comprising the steps of:
When S1, closing oil well mouth, the closing mouth of control system of preventer is opened, hydraulic oil is input to closing chamber from mouth is closed
4, it closes 4 hydraulic fluid pressure of chamber and increases, piston 2 drives flashboard 8 mobile to wellbore pressure chamber 1, closes well head；Close confession oil event
When barrier, into S2；When wellbore pressure rises, into S3；
S2, acted on by the one-way conduction of check valve, close chamber 4 hydraulic oil can not adverse current to control system of preventer,
Closing 4 hydraulic fluid pressure of chamber is constant, realizes that the closed position of flashboard 8 is automatically kept, oil well 9 remains turned-off；
S3, downhole well fluid pressure by pressure conduction device 6 conduction to close chamber 4, simultaneously close off the hydraulic oil of chamber 4
Pressure rises, and greater than pressure needed for closing oil well 9, realizes that the closed position of flashboard 8 is automatically kept, oil well 9 remains turned-off.
Band of the invention is automatically closed position and keeps the ram preventer of function without human intervention and control, realizes that flashboard is anti-
8 close stance of flashboard of spray apparatus is automatically kept, and is prevented gas blowout accident, has been prevented security risk.And the configuration of the present invention is simple, property
It can stablize, blowout prevention effect is good, has good promotional value and use value.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can readily occur in various equivalent modifications or replace
It changes, these modifications or substitutions should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with right
It is required that protection scope subject to.
Claims (7)
1. the ram preventer that position keeps function is automatically closed in a kind of band, it is connected on well mouth of oil well, and connect preventer control
The opening of system and close mouth, for preventing well kick blowout, characterized by comprising: ram blowout preventer body, and with it is described
Two identical hydraulic control one-way valves, the two identical pressure conduction devices of ram blowout preventer body connection；
The ram blowout preventer body includes: wellbore pressure chamber is connected to well head, transmits oil well well liquid pressure；Two complete phases
Same plunger shaft is symmetricly set on wellbore pressure chamber both ends, and insulates with wellbore pressure chamber；
Piston is equipped in the plunger shaft, the piston first end is located in plunger shaft, and chamber is closed in plunger shaft packing and is opened
Open chamber；The unlatching chamber is adjacent with wellbore pressure chamber；Piston second end is connected with flashboard；The flashboard is located at wellbore pressure chamber
It is interior, for closing well head；Open chamber and opening oil circuit connection；It closes chamber and closes mouth oil circuit connection；
A hydraulic control one-way valve is equipped between the closing chamber and closing mouth；The hydraulic control one-way valve oil circuit connection closes chamber and pass
It is silent, guarantee that hydraulic oil can only flow into closing chamber from mouth is closed；Hydraulic control one-way valve is closed oil well by Unidirectional flow-limiting function and is prevented
It only closes chamber hydraulic oil and returns to control system, hydraulic control one-way valve also passes through Unidirectional flow-limiting function and realizes that flashboard close stance is protected automatically
It holds；
A pressure conduction device is equipped between the closing chamber and wellbore pressure chamber, be equipped with inside the pressure conduction device than
Example piston, pressure conduction device is insulated as pressure input cavity and pressure output chamber；The pressure input cavity and wellbore pressure chamber
Connection, the pressure output chamber and closing chamber oil circuit connection；Pressure conduction device realizes that closing chamber begins by pressure conduction function
Pressure state is kept eventually, to realize that close stance is automatically kept.
2. the ram preventer that position keeps function is automatically closed in the band as described in claim 1, which is characterized in that the hydraulic control list
To valve by Unidirectional flow-limiting function close oil well, in particular to, close mouth hydraulic oil flow into close chamber, close cavity pressure increase
Greatly, it pushes piston driving flashboard mobile to wellbore centre, opens intracavitary hydraulic oil and flow back to control system of preventer from opening
Fuel tank, the flashboard pairing of both ends blowout hookup are realized and close well head.
3. the ram preventer that position keeps function is automatically closed in the band as described in claim 1, which is characterized in that the hydraulic control list
Also pass through to valve Unidirectional flow-limiting function realize flashboard close stance automatically keep, in particular to, due to the unidirectional limit of hydraulic control one-way valve
Function is flowed, that is, turns off a mouthful fuel cut-off, the hydraulic oil for closing chamber can not voluntarily be discharged along former pipeline, remain turned-off intracavitary pass
It closes pressure and is in effective status, piston does not move, to realize that the closed position of flashboard is automatically kept.
4. the ram preventer that position keeps function is automatically closed in the band as described in claim 1, which is characterized in that the pressure passes
Lead device by pressure conduction function realize flashboard close stance automatically keep, in particular to, when wellbore pressure rises, in pit shaft
Well liquid enters pressure input cavity, and by the proportional piston of pressure conduction device, the pressure of pressure input cavity is conducted pressure in proportion
Power output cavity, proportional piston is mobile to pressure output chamber one end, turns off intracavitary pressure while rising, remains turned-off the pass of chamber
It closes pressure and is in effective status, to realize that the closed position of flashboard is automatically kept.
5. the ram preventer that position keeps function is automatically closed in band as described in claim 1, which is characterized in that the hydraulic control list
It is additionally provided with pilot control hydraulic fluid port to valve, with unlatching chamber oil circuit connection；When opening well head, the hydraulic oil of opening enters unlatching chamber,
It opens cavity pressure to increase, the hydraulic oil for opening chamber oil enters hydraulic control one-way valve, and hydraulic control one-way valve is opened, and hydraulic control one-way valve loses
Unidirectional flow-limiting function is gone, the hydraulic oil for closing chamber flows into control system of preventer fuel tank；Piston to far from wellbore centre direction
It is mobile to open well head.
6. the ram preventer that position keeps function is automatically closed in band as described in claim 1, which is characterized in that well head is located at institute
State wellbore pressure chamber center.
7. the blowout prevention method that position keeps the ram preventer of function is automatically closed in a kind of band, using any institute of such as claim 1~6
The ram preventer stated is realized, which is characterized in that includes step:
When S1, closing well mouth of oil well, the closing mouth of control system of preventer is opened, hydraulic oil is input to closing chamber from mouth is closed,
It closes intracavitary hydraulic fluid pressure to increase, piston driving flashboard is mobile to wellbore pressure chamber, closes well head；Close confession oil failure
When, into S2；When wellbore pressure rises, into S3；
S2, it is acted on by the one-way conduction of check valve, the hydraulic oil for closing chamber can not close chamber countercurrently to control system of preventer
Interior hydraulic fluid pressure is constant, realizes that the closed position of flashboard is automatically kept, oil well remains turned-off；
S3, downhole well fluid pressure by pressure conduction device conduct to close chamber, simultaneously close off on the hydraulic fluid pressure of chamber
It rises, and greater than pressure needed for closing oil well, realizes that the closed position of flashboard is automatically kept, oil well remains turned-off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811447465.6A CN109267959A (en) | 2018-11-29 | 2018-11-29 | The ram preventer and its blowout prevention method of position holding function is automatically closed in a kind of band |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811447465.6A CN109267959A (en) | 2018-11-29 | 2018-11-29 | The ram preventer and its blowout prevention method of position holding function is automatically closed in a kind of band |
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| Publication Number | Publication Date |
|---|---|
| CN109267959A true CN109267959A (en) | 2019-01-25 |
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ID=65187114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811447465.6A Pending CN109267959A (en) | 2018-11-29 | 2018-11-29 | The ram preventer and its blowout prevention method of position holding function is automatically closed in a kind of band |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109267959A (en) |
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|---|---|---|---|---|
| US4440232A (en) * | 1982-07-26 | 1984-04-03 | Koomey, Inc. | Well pressure compensation for blowout preventers |
| US20060076144A1 (en) * | 2004-10-13 | 2006-04-13 | Baker Hughes Incorporated | Method and apparatus for storing energy and multiplying force to pressurize a downhole fluid sample |
| CN2929161Y (en) * | 2006-07-25 | 2007-08-01 | 辽河石油勘探局 | Novel hydraulic perforation blowout preventor |
| CN101518808A (en) * | 2009-04-09 | 2009-09-02 | 高尔荣 | Overload protective device of punch |
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| CN103696724A (en) * | 2013-12-13 | 2014-04-02 | 西南石油大学 | Emergency automatic control device of blowout preventer |
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| CN205400657U (en) * | 2016-03-09 | 2016-07-27 | 广州东塑石油钻采专用设备有限公司 | Automatic locking control device of ram -type preventer |
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| CN209293733U (en) * | 2018-11-29 | 2019-08-23 | 美钻深海能源科技研发（上海）有限公司 | The ram preventer of position holding function is automatically closed in a kind of band |
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2018
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| US4440232A (en) * | 1982-07-26 | 1984-04-03 | Koomey, Inc. | Well pressure compensation for blowout preventers |
| US20060076144A1 (en) * | 2004-10-13 | 2006-04-13 | Baker Hughes Incorporated | Method and apparatus for storing energy and multiplying force to pressurize a downhole fluid sample |
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| US20180030802A1 (en) * | 2015-02-13 | 2018-02-01 | Schlumberger Technology Corporation | Deployment blow out preventer with interlock |
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| 李慎奎;刘士岩;郝斌;王红丽;王坤青;张宁;: "防喷器高温高压密封试验装置研制", 石油矿场机械, vol. 45, no. 12, pages 43 * |
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