CN109931025A - A kind of compression rubber downhole drill preventer - Google Patents
A kind of compression rubber downhole drill preventer Download PDFInfo
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- CN109931025A CN109931025A CN201711371766.0A CN201711371766A CN109931025A CN 109931025 A CN109931025 A CN 109931025A CN 201711371766 A CN201711371766 A CN 201711371766A CN 109931025 A CN109931025 A CN 109931025A
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- packing element
- preventer
- downhole drill
- compression rubber
- upper bush
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Abstract
The invention discloses a kind of compression rubber downhole drill preventers, comprising: central tube is provided with the first by-pass prot on central tube；Upper bush, upper bush housing is on central tube, and upper bush and central tube are fixed by shear pin, and the second by-pass prot is provided on upper bush, and when compressing the packing of rubber downhole drill preventer, the second by-pass prot can be connected with the first by-pass prot；Lower sleeve, lower sleeve housing is on central tube；Connecting shaft, one end of connecting shaft connect upper bush, and the other end of connecting shaft connects lower sleeve；Packing element component, packing element component housing connecting shaft, and the bottom end of packing element component is fixed with lower sleeve, top and the upper bush of packing element component are fixed.Since the setting of shear pin realizes in the use process of compression rubber downhole drill preventer, avoid that preventer is caused accidentally to be opened because of operating conditions such as bit freezing or bouncings of drilling tool.
Description
Technical field
The present invention relates to petroleum well control technical field more particularly to a kind of compression rubber downhole drill preventers.
Background technique
In drilling process, when meeting fractured reservoir when boring, or opening payzone, bottom hole pressure surge is violent, work progress
In it is careless slightly will induce the dangerous situations such as overflow, well kick, it is serious to even result in gas blowout accident, therefore, how to ensure such pressure
Well safe during the violent wellbore construction of fluctuation, it is urgently to be resolved that prevention well control accident becomes petroleum well control worker
Problem.
In view of the above-mentioned problems, in addition to the well control that traditional drilling liquid pressure provides, ground preventer system and interior anti-
The secondary well control for spraying tools build becomes the key for handling such problem.So-called secondary well control, i.e., when the danger such as overflow occurs for shaft bottom
When feelings, interior jet-preventing tool insulates bore passage, and formation fluid enters bore hole annulus, and ground preventer is closed, and implements circulation kill-job
Re-establish the pressure balance on pit shaft and stratum.But during secondary well control, since preventer is in well head, carry out for slurry kill-job behaviour
Make that the time is long, and formation fluid intrusion volume is more, and the deeper intrusion volume of well is bigger, increases down-hole annular pressure difference, to increase
Control the difficulty of blowout.And downhole blow-out preventer is placed in well due to being installed on drill string, once realize that stratum can be effectively reduced in sealing
The intrusion volume of fluid, while forming annular space dual fail-safe with ground preventer group, similar interior jet-preventing tool and kelly cock
Hydrophthalmia blowout prevention dual fail-safe system is effectively reduced the difficulty of later period dangerous situation processing, while winning more times for post-processing.Cause
This, attention of the downhole blow-out preventer increasingly by well control worker.
Currently, downhole blow-out preventer generallys use compression rubber downhole drill preventer, compression rubber downhole drill is anti-
Spray apparatus provides enough load by transferring drill string and compresses packing element on preventer downwards, so that its expansion is formed sealing, above mentions drill string
Shrinking packing element makes its deblocking.However, compression rubber downhole drill preventer is still had in use because of bit freezing or jump
The operating conditions such as brill cause preventer accidentally to be opened, and packing element springs back slower disadvantage during deblocking.
Therefore, it how in the use process of compression rubber downhole drill preventer, avoids because of works such as bit freezing or bouncings of drilling tool
It is those skilled in the art's technical problem urgently to be resolved that condition, which causes preventer accidentally to be opened,.
Summary of the invention
The object of the present invention is to provide a kind of compression rubber downhole drill preventers, in its use process, avoid because
The operating conditions such as bit freezing or bouncing of drilling tool cause preventer accidentally to be opened.
To achieve the goals above, the present invention provides following schemes:
A kind of compression rubber downhole drill preventer, comprising:
Central tube is provided with the first by-pass prot on the central tube；
Upper bush, the upper bush housing is on the central tube, and the upper bush and the central tube pass through shearing
Pin is fixed, and the second by-pass prot is provided on the upper bush, described when compression rubber downhole drill preventer packing
Second by-pass prot can be connected with first by-pass prot；
Lower sleeve, the lower sleeve housing is on the central tube；
Connecting shaft, one end of the connecting shaft connect the upper bush, trap described in the other end connection of the connecting shaft
Cylinder；
Packing element component, connecting shaft described in the packing element component housing, and the bottom end of the packing element component and the lower sleeve
Fixed, top and the upper bush of the packing element component are fixed.
Preferably, in above-mentioned compression rubber downhole drill preventer, the packing element component includes:
Packing element mechanism, top and the upper bush of the packing element mechanism are fixed；
Expanding mechanism, the top of the expanding mechanism are connected with the bottom end of the packing element mechanism；
Contraction spring group, the top of the contraction spring group are connect with the bottom end of the expanding mechanism, the contraction spring
Group is fixed with the lower sleeve.
Preferably, in above-mentioned compression rubber downhole drill preventer, the packing element mechanism includes:
Upper baffle ring, the top of the upper baffle ring are connect with the bottom end of the expanding mechanism；
Packing element, the top of the packing element are connect with the bottom end of the upper baffle ring；
Lower baffle ring, the top of the lower baffle ring are connect with the bottom end of the packing element.
Preferably, in above-mentioned compression rubber downhole drill preventer, the upper baffle ring and the lower baffle ring are and institute
State packing element insertion connection.
Preferably, in above-mentioned compression rubber downhole drill preventer, the packing element mechanism is whole vulcanization member.
Preferably, in above-mentioned compression rubber downhole drill preventer, the connecting shaft is splined shaft, the lower sleeve
Spline housing is inside set, the top of the spline housing is connect with the spline of the splined shaft, the bottom end of the splined shaft and the upper set
Cylinder is connected through a screw thread.
It preferably, further include top connection in above-mentioned compression rubber downhole drill preventer；
The top connection housing is on the top of the central tube, and the top of the bottom end of the top connection and the upper bush
Connection.
It preferably, further include lower contact in above-mentioned compression rubber downhole drill preventer；
The top of the lower contact is connect with the bottom end of the lower sleeve.
It preferably, further include damping in above-mentioned compression rubber downhole drill preventer；
The damping is arranged between the lower sleeve and the lower contact or the bottom end of the lower contact.
Preferably, in above-mentioned compression rubber downhole drill preventer, the damping is mechanical damper, air
Damper or hydraulic buffer.
It can be seen from the above technical scheme that during compression rubber downhole drill preventer provided by the invention is mounted on
It near point, when needing to keep tensional state in normal drilling process, places it on the point of neutralization, when discovery overflow closing well
When, it is located under the point of neutralization, keeps pressured state.When normal drilling, top torque is transferred to upper bush, and upper bush will be turned round
Square passes to connecting shaft, and connecting shaft delivers torque to lower sleeve, and then realizes with brill function；At this point, second on upper bush
By-pass prot is staggered with the first by-pass prot on central tube and is not connected to, and drilling fluid can only be flowed by the center flow channels of central tube.?
When decentralization is hampered, normally creeps into bouncing of drilling tool, drill bit is provided which that reversed load is directed toward the load of well head, is less than shearing in above-mentioned load
When pin break limit, the relative displacement of upper bush and central tube is sheared pin and fixes, and central tube and lower sleeve pass through spiral shell
Line connection, the i.e. relative displacement of upper bush and lower sleeve are fixed, and load is directly transmitted by central tube, and packing element component does not stress,
It effectively prevent packing element component because of compression packing caused by false triggering.
When finding overflow, it is ensured that drill string is simultaneously transferred in bit contact shaft bottom, compresses rubber downhole drill preventer top
In the load transmission to upper bush that drill string provides, and by shear pin transmitting up to shaft bottom, when compression rubber downhole drill
The load that preventer upper drilling string provides is more than the break limit of shear pin, and shear pin is cut, lower sleeve downlink, compression
Packing element component makes its expansion, when load reaches downhole drill preventer rated operating pressure, realizes packing function, meanwhile, on
The second by-pass prot on sleeve is connected to the first by-pass prot on central tube, realizes top circulation.Compression i.e. provided by the invention
Rubber downhole drill preventer, since the setting of shear pin realizes the use in compression rubber downhole drill preventer
In the process, it avoids because the operating conditions such as bit freezing or bouncing of drilling tool cause the mistake of preventer to be opened.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art, can be under the premise of not paying novelty labour
It obtains other drawings based on these drawings.
Fig. 1 is the schematic cross-sectional view of compression rubber downhole drill preventer provided by the invention；
Fig. 2 is the A-A schematic cross-sectional view of Fig. 1；
Fig. 3 is the structural representation of the upper baffle ring or lower baffle ring of compression rubber downhole drill preventer provided by the invention
Figure.
Wherein, in Fig. 1-Fig. 3:
Central tube 1, the first by-pass prot 101, upper bush 2, shear pin 3, the second by-pass prot 201, lower sleeve 4, connecting shaft
5, packing element mechanism 6, expanding mechanism 7, contraction spring group 8, top connection 9, lower contact 10, damping 11.
Specific embodiment
It is with reference to the accompanying drawing and specific real in order to make those skilled in the art better understand technical solution of the present invention
Applying mode, the present invention is described in further detail.
Embodiment one
Fig. 1-Fig. 3 is please referred to, the invention discloses a kind of compression rubber downhole drill preventers, wherein compression packing element
Formula downhole drill preventer includes central tube 1, upper bush 2, lower sleeve 4, connecting shaft 5 and packing element component.
Wherein, the first by-pass prot 101 is provided on central tube 1, central tube 1 is internally provided with center flow channels, the first bypass
Hole 101 and center flow channels conducting, and in normal drilling process, drilling fluid can only be flowed by center flow channels.
2 housing of upper bush is on central tube 1, and upper bush 2 and central tube 1 are fixed by shear pin 3, specifically: on
Sleeve 2 is provided with perforative pin hole, and 1 position of central tube corresponding with 2 pin hole site of upper bush is provided with groove, shear pin 3
Through upper bush 2 and it is inserted into the groove of central tube 1.
The second by-pass prot 201 is provided on upper bush 2, the second by-pass prot 201 is through-hole.Under normal conditions, the first by-pass prot 101
It is not turned on the second by-pass prot 201, only when compressing the packing of rubber downhole drill preventer, the second by-pass prot 201 and the
Bypass hole 101 can be connected.
4 housing of lower sleeve is on central tube 1.One end of connecting shaft 5 connects upper bush 2, under the other end connection of connecting shaft 5
Sleeve 4, connecting shaft 5 is for transmitting torque.
Packing element component housing connecting shaft 5, and the bottom end of packing element component and lower sleeve 4 are fixed, the top of packing element component with it is upper
Sleeve 2 is fixed.
Compression rubber downhole drill preventer provided by the invention is mounted near the point of neutralization, when in normal drilling process
In need to keep tensional state, place it on the point of neutralization, when finding overflow closing well, be located under the point of neutralization, protect
Hold pressured state.It should be noted that the location point that the point of neutralization refers to tubing string neither tension nor is pressurized.
When normal drilling, top torque is transferred to upper bush 2, and upper bush 2 delivers torque to connecting shaft 5, and connecting shaft 5 will
Torque passes to lower sleeve 4, and then realizes with brill function；At this point, in the second by-pass prot 201 and central tube 1 on upper bush 2
First by-pass prot 101, which is staggered, not to be connected to, and drilling fluid can only be flowed by the center flow channels of central tube 1.
When decentralization is hampered, normally creeps into bouncing of drilling tool, drill bit is provided which that reversed load is directed toward the load of well head, in above-mentioned load
When lotus is less than 3 break limit of shear pin, the relative displacement of upper bush 2 and central tube 1 is sheared pin 3 and fixes, and central tube 1
It is connected through a screw thread with lower sleeve 4, i.e. the relative displacement of upper bush 2 and lower sleeve 4 is fixed, and load directly passes through central tube 1 and passes
It passs, packing element component does not stress, and effectively prevent packing element component because of compression packing caused by false triggering.
When finding overflow, it is ensured that drill string is simultaneously transferred in bit contact shaft bottom, and downhole drill preventer compresses rubber underground
In the load transmission to upper bush 2 provided with brill preventer upper drilling string, and by the transmitting of shear pin 3 until shaft bottom, compresses
The load that rubber downhole drill preventer upper drilling string provides is more than the break limit of shear pin 3, and shear pin 3 is cut
Disconnected, 4 downlink of lower sleeve, compression packing element component makes its expansion, when load reaches the compression specified work of rubber downhole drill preventer
When making pressure, packing function is realized, meanwhile, the second by-pass prot 201 on upper bush 2 and the first by-pass prot 101 on central tube 1
Top circulation is realized in connection.
Compression rubber downhole drill preventer i.e. provided by the invention, is being pressed since the setting of shear pin 3 realizes
In the use process of contracting rubber downhole drill preventer, avoid that preventer is caused accidentally to be opened because of operating conditions such as bit freezing or bouncings of drilling tool.
Embodiment two
It is provided in another embodiment in the present invention, compression rubber downhole drill preventer and embodiment in the present embodiment
As soon as the structure of compression rubber downhole drill preventer in is similar, repeats no more to something in common, only introduces difference
Place.
In the present embodiment, specifically disclosing packing element component includes packing element mechanism 6, expanding mechanism 7 and contraction spring group 8.
The top of packing element mechanism 6 is the top of packing element component, i.e. the top of packing element mechanism 6 and upper bush 2 is fixed, specific logical
Cross pin connection.
The top of expanding mechanism 7 is connected with the bottom end of packing element mechanism 6 by screw-nut, the top of contraction spring group 8 with
The bottom end of expanding mechanism 7 is connected also by screw-nut, easy to disassemble, and the bottom end of contraction spring group 8 is the bottom end of packing element component.
It further, include upper baffle ring, packing element and lower baffle ring the invention discloses packing element mechanism 6.Wherein, the top of upper baffle ring
End is connect with the bottom end of expanding mechanism 7, and the top of packing element and the bottom end of upper baffle ring connect, the top of lower baffle ring and the bottom end of packing element
Connection.
Further, it is embedded in and connects with packing element the invention discloses upper baffle ring and lower baffle ring, is i.e. upper baffle ring and lower baffle ring
It is all made of projecting block design with the face that packing element contacts respectively, upper baffle ring is identical with the structure of lower baffle ring, upper baffle ring and lower baffle ring
Structure is as shown in Figure 3.When negative drawing upper baffle ring and lower baffle ring, no matter the projecting block of irregular figure or polymorphic structure can mention
For the active force of negative drawing packing element.
It further, is whole vulcanization member the invention discloses packing element mechanism 6, i.e. upper baffle ring and lower baffle ring and packing element is whole
Vulcanization.
In the present embodiment, specifically disclosing connecting shaft 5 is splined shaft, sets spline housing in lower sleeve 4, the top of spline housing with
The spline of splined shaft connects, and bottom end and the upper bush 2 of splined shaft are connected through a screw thread.It should be noted that connecting shaft 5 can also be with
It is the axis of other forms, as long as the connecting shaft 5 that can transmit torque belongs to the scope of protection of the invention.
It further, further include top connection 9 the invention discloses compression rubber downhole drill preventer, outside top connection 9
It covers on the top of central tube 1, and the bottom end of top connection 9 is threadedly coupled with the top of upper bush 2, the top of top connection 9 is for connecting
Connect drill string.
It further, further include lower contact 10, lower contact the invention discloses compression rubber downhole drill preventer
10 top is connect with the bottom end of lower sleeve 4.
In order to reduce shear pin 3 because bouncing of drilling tool causes intensity caused by fatigue to decline, the invention discloses compression rubbers
Downhole drill preventer further includes damping 11, damping 11 be arranged between lower sleeve 4 and lower contact 10 or under connect
First 10 bottom end.
It further, is mechanical damper, air bump or hydraulic buffer the invention discloses damping 11.
When compression rubber downhole drill preventer disclosed by the invention is normally crept into, top torque is transferred to top connection 9
With upper bush 2, upper bush 2 delivers torque to splined shaft by screw thread, and splined shaft and spline housing cooperation deliver torque to down
Sleeve 4, lower sleeve 4 deliver torque to lower contact 10 by screw thread, and then realize with brill function.At this point, on upper bush 2
Two by-pass prots 201 are staggered with the first by-pass prot 101 on central tube 1 and are not connected to, and drilling fluid can only be flowed by the center of central tube 1
Road flowing.
If, when decentralization is hampered, normally creeps into bouncing of drilling tool, drill bit is provided which that reversed load is directed toward well without shear pin 3
The load of mouth, which is transferred directly to lower baffle ring by lower contact 10 and lower sleeve 4, and the load that upper drilling string provides passes through
Top connection 9 and expanding mechanism 7 are transferred directly to upper baffle ring；Packing element bears the load that upper baffle ring is downward and lower baffle ring is upward at the same time
When, generate compression-expansion.Shear pin 3 is added, when above-mentioned load is less than 3 break limit of shear pin, upper bush 2 and center
It is fixed that the relative displacement of pipe 1 is sheared pin 3, and central tube 1 and lower sleeve 4 are connected through a screw thread, i.e. upper bush 2 and lower sleeve
4 relative displacement is fixed, and load directly passes through central tube 1 and transmits, and packing element mechanism 6 does not stress, and effectively prevent packing element because of false triggering
Caused compression packing；Meanwhile the addition of damping 11, the reversed load of drill bit application can be partly or entirely absorbed, together
When pin can be effectively reduced because bouncing of drilling tool causes intensity caused by fatigue to decline.
When finding overflow, it is ensured that drill string is simultaneously transferred in bit contact shaft bottom, compresses rubber downhole drill preventer top
The load that drill string provides acts in top connection 9 and upper bush 2, and is transmitted to lower contact 10 until shaft bottom, works as pressure by pin
The load that contracting rubber downhole drill preventer upper drilling string provides is more than the break limit of shear pin 3, and shear pin 3 is cut
Disconnected, 2 downlink of top connection 9 and upper bush compresses contraction spring group 8 and opens expanding mechanism 7, and continuing traveling downwardly compression packing element keeps its swollen
It is swollen, when load reaches compression rubber downhole drill preventer rated operating pressure, realize packing function；Meanwhile upper bush 2
On the second by-pass prot 201 be connected to the first by-pass prot 101 on central tube 1, realize top circulation.
When deblocking, drill string is above mentioned, contraction spring group 8 stretches expanding mechanism 7, and expanding mechanism 7 is shunk, and stretches upper baffle ring,
Projecting block on upper baffle ring can provide the active force for being pulled up packing element；Compress the drilling tool of rubber downhole drill preventer lower part
Since gravity stretches downwards lower baffle ring, the projecting block on lower baffle ring can provide the active force for stretching packing element downwards for combination, therefore, on
Shelves ring and lower gear ring can pull packing element that packing element rebound is helped to realize quickly deblocking.
In conclusion the present invention can timely and effectively control underground overflow, establishes new circulation canal and be convenient for
Subsequent compression operation effectively prevent the generation of gas blowout accident, and the present invention overcomes compression rubber downhole drill blowout preventions
Device causes preventer accidentally to be opened because of operating conditions such as bit freezing or bouncings of drilling tool in use, and deblocking process packing element springs back slow disadvantage.
" first " in the present invention, " second " etc. are to be distinguished in description, without others particular meanings.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein and novel features phase
Consistent widest scope.
Claims (10)
1. a kind of compression rubber downhole drill preventer characterized by comprising
Central tube (1) is provided with the first by-pass prot (101) on the central tube (1)；
Upper bush (2), upper bush (2) housing is on the central tube (1), and the upper bush (2) and the central tube
(1) fixed by shear pin (3), the second by-pass prot (201) are provided on the upper bush (2), when the compression rubber well
Under with bore preventer packing when, second by-pass prot (201) can be connected with first by-pass prot (101)；
Lower sleeve (4), lower sleeve (4) housing is on the central tube (1)；
Connecting shaft (5), one end of the connecting shaft (5) connect the upper bush (2), the other end connection of the connecting shaft (5)
The lower sleeve (4)；
Packing element component, connecting shaft (5) described in the packing element component housing, and the bottom end of the packing element component and the lower sleeve
(4) fixed, the top and the upper bush (2) of the packing element component are fixed.
2. compression rubber downhole drill preventer according to claim 1, which is characterized in that the packing element component packet
It includes:
Packing element mechanism (6), the top and the upper bush (2) of the packing element mechanism (6) are fixed；
The top of expanding mechanism (7), the expanding mechanism (7) is connected with the bottom end of the packing element mechanism (6)；
Contraction spring group (8), the top of the contraction spring group (8) are connect with the bottom end of the expanding mechanism (7), the contraction
Groups of springs (8) and the lower sleeve (4) are fixed.
3. compression rubber downhole drill preventer according to claim 2, which is characterized in that the packing element mechanism (6)
Include:
Upper baffle ring, the top of the upper baffle ring are connect with the bottom end of the expanding mechanism (7)；
Packing element, the top of the packing element are connect with the bottom end of the upper baffle ring；
Lower baffle ring, the top of the lower baffle ring are connect with the bottom end of the packing element.
4. compression rubber downhole drill preventer according to claim 3, which is characterized in that the upper baffle ring and described
Lower baffle ring is embedded in the packing element and connects.
5. compression rubber downhole drill preventer according to claim 2, which is characterized in that the packing element mechanism (6)
For whole vulcanization member.
6. compression rubber downhole drill preventer according to claim 1, which is characterized in that the connecting shaft (5) is
Splined shaft, the lower sleeve (4) is interior to set spline housing, and the top of the spline housing is connect with the spline of the splined shaft, the flower
The bottom end of key axis is connected through a screw thread with the upper bush (2).
7. compression rubber downhole drill preventer according to claim 1, which is characterized in that further include top connection (9)；
Top connection (9) housing is on the top of the central tube (1), and the bottom end of the top connection (9) and the upper bush
(2) top connection.
8. compression rubber downhole drill preventer according to any one of claims 1-7, which is characterized in that also wrap
Include lower contact (10)；
The top of the lower contact (10) is connect with the bottom end of the lower sleeve (4).
9. compression rubber downhole drill preventer according to claim 8, which is characterized in that further include damping
(11)；
The damping (11) is arranged between the lower sleeve (4) and the lower contact (10) or the lower contact (10)
Bottom end.
10. compression rubber downhole drill preventer according to claim 9, which is characterized in that the damping
It (11) is mechanical damper, air bump or hydraulic buffer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711371766.0A CN109931025A (en) | 2017-12-19 | 2017-12-19 | A kind of compression rubber downhole drill preventer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711371766.0A CN109931025A (en) | 2017-12-19 | 2017-12-19 | A kind of compression rubber downhole drill preventer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109931025A true CN109931025A (en) | 2019-06-25 |
Family
ID=66983285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711371766.0A Pending CN109931025A (en) | 2017-12-19 | 2017-12-19 | A kind of compression rubber downhole drill preventer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109931025A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113915294A (en) * | 2020-07-08 | 2022-01-11 | 中国石油化工股份有限公司 | Turbo drill speed reducer and turbo drill with same |
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| CN201087722Y (en) * | 2007-09-29 | 2008-07-16 | 许苏明 | Barefoot well packer |
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| CN202090887U (en) * | 2011-05-26 | 2011-12-28 | 西南石油大学 | Downhole annular blowout preventer |
| CN104314506A (en) * | 2014-10-10 | 2015-01-28 | 长江大学 | Electric-control compression type downhole blow-out preventer |
| CN104389547A (en) * | 2014-09-05 | 2015-03-04 | 西南石油大学 | Novel extruding rubber tube for built-in metal component and processing process of novel extruding rubber tube |
| CN204571908U (en) * | 2015-05-08 | 2015-08-19 | 中石化石油工程机械有限公司研究院 | A kind of compression downhole blow-out preventer |
| CN206267797U (en) * | 2016-11-04 | 2017-06-20 | 西南石油大学 | A kind of Novel down-hole instrument with vibration isolation defencive function |
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2017
- 2017-12-19 CN CN201711371766.0A patent/CN109931025A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4554976A (en) * | 1983-05-12 | 1985-11-26 | Hydril Company | Test tool for subsea blowout preventer stack |
| CN201087722Y (en) * | 2007-09-29 | 2008-07-16 | 许苏明 | Barefoot well packer |
| CN101812981A (en) * | 2010-04-17 | 2010-08-25 | 西南石油大学 | Mechanical underground all-in-one blowout preventer |
| CN202090887U (en) * | 2011-05-26 | 2011-12-28 | 西南石油大学 | Downhole annular blowout preventer |
| CN104389547A (en) * | 2014-09-05 | 2015-03-04 | 西南石油大学 | Novel extruding rubber tube for built-in metal component and processing process of novel extruding rubber tube |
| CN104314506A (en) * | 2014-10-10 | 2015-01-28 | 长江大学 | Electric-control compression type downhole blow-out preventer |
| CN204571908U (en) * | 2015-05-08 | 2015-08-19 | 中石化石油工程机械有限公司研究院 | A kind of compression downhole blow-out preventer |
| CN206267797U (en) * | 2016-11-04 | 2017-06-20 | 西南石油大学 | A kind of Novel down-hole instrument with vibration isolation defencive function |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113915294A (en) * | 2020-07-08 | 2022-01-11 | 中国石油化工股份有限公司 | Turbo drill speed reducer and turbo drill with same |
| CN113915294B (en) * | 2020-07-08 | 2023-03-28 | 中国石油化工股份有限公司 | Turbo drill speed reducer and turbo drill with same |
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Application publication date: 20190625 |
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| RJ01 | Rejection of invention patent application after publication |