CN207499828U - A kind of high stability pressurize coring device automatically controlled - Google Patents
A kind of high stability pressurize coring device automatically controlled Download PDFInfo
- Publication number
- CN207499828U CN207499828U CN201721319816.6U CN201721319816U CN207499828U CN 207499828 U CN207499828 U CN 207499828U CN 201721319816 U CN201721319816 U CN 201721319816U CN 207499828 U CN207499828 U CN 207499828U
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- pressurize
- inner cylinder
- wall
- outer barrel
- lug boss
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Abstract
The utility model is related to a kind of high stability pressurize coring device automatically controlled, including pressurize outer barrel, pressurize inner cylinder, renovate, sliding block and spring；The middle and lower sections inner wall of pressurize outer barrel forms outer barrel lug boss circumferentially arranged with mounting groove, top inner wall outwardly convex, and outer barrel lug boss middle and lower sections circumferentially offer trapezoidal valve port；Sealing ring is embedded with inside trapezoidal valve port；The middle and lower sections outer wall of pressurize inner cylinder, which circumferentially outwardly protrudes, is formed with inner cylinder lug boss；Pressurize inner cylinder, which is located to be formed between the outer wall and mounting groove on the downside of inner cylinder lug boss, renovates accommodating cavity；Spring retention chamber is formed between the stage casing of pressurize inner cylinder and the stage casing of epimere outer wall and pressurize outer barrel and epimere inner wall；Inner cylinder lug boss is circumferentially equidistant to offer keyway；It renovates matching and is accommodated in and renovate in accommodating cavity；Sliding block matching is installed in keyway；Spring matching is placed in spring retention intracavitary.The utility model structure design is simple, reasonable, and leakproofness is good, easy for operation, reliable.
Description
Technical field
The utility model belongs to pressurize apparatus field, and in particular to a kind of high stability pressurize coring dress automatically controlled
It puts.
Background technology
Deep ground deep-sea area strata pressure is high, and when carrying out region rock stratum sampling, the rock sample to ensure to get reaches in ground
Still in hyperbaric environment in situ after face, it need to be stored using pressurize coring tube and transport sample.Pressurize coring tube hangs in depth vertically
Ground coring area, after rock sample enters pressurize cylinder by lifting, pressurize cylinder, which is renovated, to be closed to form hyperbaric environment in cylinder.Deep ground blue water
Usually with the presence of a large amount of fluids, therefore institute's packing pressure often exists in the form of hydraulic pressure.Since sampling area is in deep ground region, remotely
Control is difficult, therefore pressurize cylinder is needed to renovate energy automatic trigger after rock sample enters pressurize cylinder and closed, and trigger architecture requirement is simple
Reliably.Pressurize cylinder is renovated close after form closed pressurize environment, need to make to renovate certain preload pressure, prevent inside and outside pressurize cylinder
Periphery generation gap is renovated when pressure difference is smaller causes pressurize to be failed.Conventional clamshell compresses mostly by its own gravity or torsional spring, past
It is inadequate toward pressing force, lack external auxiliary clamping device.A small number of pressurize wound packages, which rests against rock sample free gravity whereabouts, will renovate pressure
Tightly, pressure-keeping mechanism is caused to be damaged easily to renovating generation greater impact in compaction process.
Invention content
In view of the above-mentioned problems, simple, reasonable the utility model proposes a kind of structure design, leakproofness is good, and operation makes
With high stability pressurize coring device that is convenient, reliably automatically controlling.
The technical solution of the utility model is as follows：
The above-mentioned high stability pressurize coring device automatically controlled including pressurize outer barrel and is installed on the pressurize outer barrel
Internal pressurize inner cylinder；The pressurize coring device further include renovate, sliding block and spring；The middle and lower sections inner wall of the pressurize outer barrel
Circumferentially arranged with mounting groove, top inner wall outwardly convex forms outer barrel lug boss, and the outer barrel lug boss middle and lower sections are circumferentially opened
Equipped with trapezoidal valve port；Sealing ring is embedded with inside the trapezoidal valve port；The upper end inner wall of the pressurize outer barrel passes through the sealing
The upper end outer wall of ring and the pressurize inner cylinder is tightly connected；The inner cavity of the pressurize inner cylinder is pressurize cabin, and bottom end is limited in described
The lower end internal groove side wall of mounting groove, middle and lower sections outer wall, which circumferentially outwardly protrudes, is formed with inner cylinder lug boss；The inner cylinder lug boss
Upper end outer wall is embedded with pressurize inner cylinder sealing ring and by the pressurize inner cylinder sealing ring and the inner wall sealing of the pressurize outer barrel
Connection；The pressurize inner cylinder, which is located to be formed between the outer wall on the downside of the inner cylinder lug boss and the mounting groove, renovates accommodating cavity；
Spring retention chamber is formed between the stage casing of the pressurize inner cylinder and epimere outer wall and the stage casing of the pressurize outer barrel and epimere inner wall；
The inner cylinder lug boss is circumferentially equidistant to offer keyway；It is described to renovate matching and be accommodated in positioned at the pressurize inner cylinder wherein one
The described of side is renovated in accommodating cavity, and bullet is also folded between the outer wall for renovating stage casing and hypomere and the mounting groove internal groove bottom
Piece, the edge renovated, which is additionally provided with, renovates sealing ring, passes through between the top renovated and the inner cylinder lug boss
Described to renovate sealing ring sealed connection, the Basolateral renovated is connect by hinge with the internal groove bottom of the mounting groove；Institute
Sliding block matching is stated to be installed in the keyway；The spring, which matches, is placed in the spring retention intracavitary, described in the connection of the upper end
The lower part of outer barrel lug boss, lower end connect the top of the inner cylinder lug boss.
The high stability pressurize coring device automatically controlled, wherein：The inner cylinder lug boss circumferentially equidistantly leaves
If there are three keyway, there are three the sliding block tools and is installed in respectively in three keyways；The lower end edge of each sliding block
Circumference outwardly protrudes and protrusion activity is stretched into across the keyway in the pressurize cabin of the pressurize inner cylinder.
The high stability pressurize coring device automatically controlled, wherein：The pressurize inner cylinder is also structure as a whole, wherein
Epimere is circumferentially uniformly distributed a circle pore, and top inner wall has circumferentially protruded out convex shoulder.
The high stability pressurize coring device automatically controlled, wherein：The pressurize coring device further include center-pole,
Pvc pipe, accumulator and PDC drill bit；The center-pole is arranged in the pressurize cabin of the pressurize inner cylinder, and top is from top down
It offers drag-line hole and passes through the drag-line hole and match connection with external drag-line；The pvc pipe is sheathed under the center-pole
End, the upper end outer wall are circumferentially convexly equipped with shoulder rank；The shoulder rank slides up and down along the inner wall of pressurize inner cylinder, slides into the guarantor
It presses and is connected during the top inner wall of inner cylinder with the convex shoulder, make to form sealing above the pressurize cabin of the pressurize inner cylinder；It is described
Accumulator is installed on the center-pole；The PDC drill bit is connected to the bottom end of the pressurize outer barrel and extends to the pressurize
Outer drum outer wall.
The high stability pressurize coring device automatically controlled, wherein：The pressurize outer barrel is structure as a whole, wherein on
Section inner wall is set with outer brill circumferentially arranged with groove, outside matching, and top assembly connection has hydraulic motor；In the hydraulic motor
Drilling fluid is passed through between the outer brill to drive the hydraulic motor, and then drives the pressurize outer barrel and the PDC drill bit
Rotation；
The high stability pressurize coring device automatically controlled, wherein：The bottom of the center-pole is circumferentially convexly equipped with
Rounded center-pole limited block, middle and lower sections body of rod middle part offer fitting groove；The accumulator matching is installed in the center
In the fitting groove of bar.
The high stability pressurize coring device automatically controlled, wherein：The pore of the pvc pipe is by under central coaxial
Pore and upper pore composition；The diameter of the upper pore is less than the diameter of the lower pore and is mutually fitted with the body of rod of the center-pole
Should, the body of rod activity of the center-pole passes through the upper pore；The diameter of the lower pore and the center-pole limited block diameter
Match；The center-pole limited block is actively located in the lower pore.
Advantageous effect：
The high stability pressurize coring device structure design that the utility model automatically controls is simple, reasonable, and leakproofness is good,
Easy for operation, reliable, specific advantage is as follows：
(1) it in location of the coring procedure, is carried on center-pole, spring-compressed, trapezoidal valve port is opened, and flow is discharged rapidly, enables spring
Enough rapid compressions, reduce the working time；Closed check valve during recoil of spring, flow enter slow, and spring is made slowly to spring back, to turning over
The lid sufficient time covers, and mitigate impact of the pressurize inner cylinder to renovating.
(2) spring makes pressurize cylinder when external and internal pressure difference is little it is ensured that good close to one precompression of application is renovated
Envelope.
(3) renovate by pressurize inner cylinder move up triggering close, accounted for compared to conventional ball valve device it is small, it is simple in structure,
Without extra control device.
Description of the drawings
Fig. 1 is the structure diagram of high stability pressurize coring device that the utility model automatically controls；
Fig. 2 is the partial structural diagram of high stability pressurize coring device that the utility model automatically controls；
Fig. 3 is the enlarged drawing of a-quadrant in Fig. 1 of high stability pressurize coring device that the utility model automatically controls；Fig. 4
The enlarged drawing of B area in the Fig. 1 of high stability pressurize coring device automatically controlled for the utility model；Fig. 5 is new for this practicality
The enlarged drawing in C regions in Fig. 1 of high stability pressurize coring device that type automatically controls；Fig. 6 is automatically controlled for the utility model
High stability pressurize coring device Fig. 1 in D regions enlarged drawing；Fig. 7 is the high stability that the utility model automatically controls
The enlarged drawing in E regions in Fig. 1 of pressurize coring device；Fig. 8 is the high stability pressurize coring dress that the utility model automatically controls
The enlarged drawing in E regions in the Fig. 1 put.
Specific embodiment
As shown in Fig. 1 to Fig. 8 the high stability pressurize coring device that the utility model automatically controls, including pressurize outer barrel 1,
Pressurize inner cylinder 2 renovates 3, sliding block 4, spring 5, center-pole 6, pvc pipe 7, accumulator 8 and PDC drill bits 9.
The pressurize outer barrel 1 is structure as a whole, and middle and lower sections inner wall is circumferentially arranged with mounting groove 11, and middle epimere inner wall is circumferentially
Equipped with groove 12, top inner wall outwardly convex forms outer barrel lug boss 13 and 13 middle and lower sections of outer barrel lug boss circumferentially open up
There is trapezoidal valve port 14；Sealing ring 141 is embedded with inside the trapezoidal valve port 14, the upper end inner wall of the pressurize outer barrel 1 passes through sealing ring
141 are tightly connected with 2 upper end outer wall of pressurize inner cylinder.Wherein, the lower end internal groove side wall outwardly convex of the mounting groove 11 is thickening；Meanwhile
The external matching of the pressurize outer barrel 1 is set with outer brill 15, and top assembly connection has hydraulic motor 16；In hydraulic motor 16 and outer brill
Drilling fluid driving hydraulic motor 16 is passed through between 15 drives pressurize outer barrel 1 and PDC drill bit 9 to rotate.
The pressurize inner cylinder 2 is also structure as a whole, and it is pressurize cabin to be installed in 1 inside of pressurize outer barrel and inner cavity, and bottom end limits
Positioned at the lower end internal groove side wall of mounting groove 11, middle and lower sections outer wall, which circumferentially outwardly protrudes, is formed with inner cylinder lug boss 21, middle epimere edge
It is circumferentially uniformly distributed to have a circle pore 22；The 21 upper end outer wall of inner cylinder lug boss is embedded with pressurize inner cylinder sealing ring 211 and passes through
Pressurize inner cylinder sealing ring 211 is connect with 1 inner wall sealing of pressurize outer barrel.Wherein, which is located at 21 downside of inner cylinder lug boss
Outer wall and pressurize outer barrel 1 mounting groove 11 between formed renovate accommodating cavity 23；The stage casing of the pressurize inner cylinder 2 and epimere outer wall with
Spring retention chamber 24 is formed between the stage casing of pressurize outer barrel 1 and epimere inner wall；Meanwhile the inner cylinder lug boss 21 is circumferentially equidistant
It opens up there are three keyway, the top inner wall of the pressurize inner cylinder 2 has circumferentially protruded out convex shoulder 25.
This is renovated 3 matchings and is accommodated in renovating in accommodating cavity 23 positioned at the wherein side of pressurize inner cylinder 2, this renovate 3 stage casings and
Also be folded with shrapnel 31 between the outer wall of hypomere and 11 internal groove bottom of mounting groove of pressurize outer barrel 1, this renovate 3 edges be equipped with turn over
Lid sealing ring 32, this is renovated and is tightly connected between 3 tops and inner cylinder lug boss 21 by renovating sealing ring 32, this renovates 3 bottom
End outside is connect by hinge 33 with 11 internal groove bottom of mounting groove of pressurize outer barrel 1.
There are three the sliding block 4 tools and matching is installed in three keyways on the inner cylinder lug boss 21 of pressurize inner cylinder 2 respectively；
Wherein, the inner cavity that each 4 lower end of sliding block circumferentially outwardly protrudes and protrusion activity passes through keyway to stretch into pressurize inner cylinder 2.
The spring 5 matching is placed in spring retention chamber 24, the lower part of the upper end connection outer barrel lug boss 13, lower end connection
The top of inner cylinder lug boss 21.
The center-pole 6 is arranged in the pressurize cabin of the pressurize inner cylinder 2, and bottom is circumferentially convexly equipped with rounded center-pole
Limited block 61, middle and lower sections body of rod middle part offer fitting groove 62；Meanwhile 6 top of center-pole offers drag-line from top down
Hole 63 simultaneously passes through drag-line hole 63 and matches connection with external drag-line.
The pvc pipe 7 is sheathed on 6 lower end of center-pole and in the pressurize cabin of pressurize inner cylinder 2, and pore is by central coaxial
Lower pore 71 and upper pore 72 form；Wherein, on this pore 71 diameter be less than lower pore 72 diameter and with the bar of center-pole 6
Body is adapted, and the body of rod activity of the center-pole 6 passes through upper pore 71；The diameter of the lower pore 72 and 61 diameter of center-pole limited block
Match；The center-pole limited block 61 is actively located in lower pore 72.Meanwhile the upper end outer wall circumferentially projection of the pvc pipe 7
There is shoulder rank 73；The shoulder rank 73 slides up and down along the inner tube wall of pressurize inner cylinder 2, in the top inner wall for sliding into pressurize inner cylinder 2
Make to be formed above pressurize cabin with the mating connection of convex shoulder 25 and seal.
The accumulator 8 matching is installed in the fitting groove 62 of the center-pole 6.
The PDC drill bit 9 is connected to the bottom end of the pressurize outer barrel 1 and extends to 1 outer wall of pressurize outer barrel.
The specific work process of the utility model is as follows：
(1) center-pole 6 is lifted, the shoulder rank 73 of its lower end is made to tangle the protrusion of sliding block 4, in movable slider 4 and pressurize
Cylinder 2 moves up, while spring 5 is compressed, during this between pressurize inner cylinder 2 and pressurize outer barrel 1 water of interlayer from pore 22 and ladder
It is flowed out simultaneously in shape valve port 14, the velocity of discharge is fast, and the interlayer space between pressurize outer barrel 1 and pressurize inner cylinder 2 is reduced rapidly, pressurize
Inner cylinder 2 moves up rapidly, and spring 5 compresses rapidly.
(2) after 2 lower end of pressurize inner cylinder, which is crossed, renovates 3 upper end, 3 is renovated and is released, shrapnel 31 will renovate 3 and flick, and renovate
The rotation of 3 around hinges 33 is closed, and is renovated sealing ring 32 and is in close contact with pressurize inner cylinder 2 and closes pressurize cylinder.
(3) sliding block 4 is towed at groove 12, is obtained space and is flicked, is hereafter detached with center-pole 6.
(4) center-pole 6 continues to pull up, and sliding block 4 is fallen after rise with pressurize inner cylinder 2 under gravity and the effect of 5 elastic force of spring, this mistake
Sealing ring 141 closes trapezoidal valve port 14 by the downward jam-packed of flow in journey, and the water in pressurize cylinder can only be flowed into from metering orifice and be pressed from both sides
Layer, is discharged into that speed is slow, and the interlayer space between pressurize outer barrel 1 and pressurize inner cylinder 2 slowly increases, and parital vacuum is formed in interlayer to be made
By the resistance moved down so as to slowly fall, spring 5 is slowly sprung back pressurize inner cylinder 2, and pressurize inner cylinder 2 can gently fall contact after rise and turn over
Lid 3 greatly reduces the impact to renovating 3, and compresses and renovate 3, enhances pressurize leakproofness.
The utility model structure design is simple, reasonable, and leakproofness is good, easy for operation, reliable.
Claims (7)
1. a kind of high stability pressurize coring device automatically controlled including pressurize outer barrel and is installed on the pressurize outer barrel
Pressurize inner cylinder；It is characterized in that：The pressurize coring device further include renovate, sliding block and spring；
The middle and lower sections inner wall of the pressurize outer barrel forms outer barrel lug boss circumferentially arranged with mounting groove, top inner wall outwardly convex,
The outer barrel lug boss middle and lower sections circumferentially offer trapezoidal valve port；Sealing ring is embedded with inside the trapezoidal valve port；The guarantor
The upper end inner wall of outer barrel is pressed to be tightly connected by the upper end outer wall of the sealing ring and the pressurize inner cylinder；
The inner cavity of the pressurize inner cylinder is pressurize cabin, and bottom end is limited in the lower end internal groove side wall of the mounting groove, middle and lower sections outer wall edge
Peripherally and outwardly protrusion is formed with inner cylinder lug boss；The upper end outer wall of the inner cylinder lug boss is embedded with pressurize inner cylinder sealing ring and leads to
The inner wall sealing that the pressurize inner cylinder sealing ring is crossed with the pressurize outer barrel is connect；The pressurize inner cylinder is located at inner cylinder protrusion
It is formed between the outer wall of subordinate side and the mounting groove and renovates accommodating cavity；The stage casing of the pressurize inner cylinder and epimere outer wall with it is described
Spring retention chamber is formed between the stage casing of pressurize outer barrel and epimere inner wall；The inner cylinder lug boss is circumferentially equidistant to offer key
Slot；
It is described to renovate matching and be accommodated in and renovated in accommodating cavity positioned at described in the pressurize inner cylinder wherein side, it is described to renovate stage casing
And hypomere outer wall and the mounting groove internal groove bottom between be also folded with shrapnel, the edge renovated be additionally provided with renovate it is close
Seal is tightly connected by the sealing ring of renovating between the top renovated and the inner cylinder lug boss, described to renovate
Basolateral is connect by hinge with the internal groove bottom of the mounting groove；
The sliding block matching is installed in the keyway；
The spring matching is placed in the spring retention intracavitary, and the upper end connects the lower part of the outer barrel lug boss, and lower end connects
Connect the top of the inner cylinder lug boss.
2. the high stability pressurize coring device automatically controlled as described in claim 1, it is characterised in that：The inner cylinder protrusion
Portion is circumferentially equidistant to be opened up there are three keyway, and the sliding block has there are three and is installed in respectively in three keyways；Each
The pressurize cabin that the lower end of the sliding block circumferentially outwardly protrudes and protrusion activity passes through the keyway to stretch into the pressurize inner cylinder
It is interior.
3. the high stability pressurize coring device automatically controlled as described in claim 1, it is characterised in that：The pressurize inner cylinder
Also it is structure as a whole, wherein epimere is circumferentially uniformly distributed a circle pore, and top inner wall has circumferentially protruded out convex shoulder.
4. the high stability pressurize coring device automatically controlled as claimed in claim 3, it is characterised in that：The pressurize coring
Device further includes center-pole, pvc pipe, accumulator and PDC drill bit；
The center-pole is arranged in the pressurize cabin of the pressurize inner cylinder, and top offers drag-line hole from top down and passes through
The drag-line hole matches connection with external drag-line；
The pvc pipe is sheathed on the lower end of the center-pole, and the upper end outer wall is circumferentially convexly equipped with shoulder rank；The shoulder rank is along guarantor
The inner wall of pressure inner cylinder slides up and down, and is connected when sliding into the top inner wall of the pressurize inner cylinder with the convex shoulder, makes described
Sealing is formed above the pressurize cabin of pressurize inner cylinder；
The accumulator is installed on the center-pole；
The PDC drill bit is connected to the bottom end of the pressurize outer barrel and extends to the outer drum outer wall of the pressurize.
5. the high stability pressurize coring device automatically controlled as claimed in claim 4, it is characterised in that：The pressurize outer barrel
It is structure as a whole, wherein epimere inner wall is set with outer brill circumferentially arranged with groove, outside matching, and top assembly connection has hydraulic pressure horse
It reaches；Drilling fluid is passed through between the hydraulic motor and the outer brill to drive the hydraulic motor, and then drives the pressurize
Outer barrel and PDC drill bit rotation；
6. the high stability pressurize coring device automatically controlled as claimed in claim 4, it is characterised in that：The center-pole
Bottom is circumferentially convexly equipped with rounded center-pole limited block, and fitting groove is offered in the middle part of the middle and lower sections body of rod；The accumulator
With being installed in the fitting groove of the center-pole.
7. the high stability pressurize coring device automatically controlled as claimed in claim 6, it is characterised in that：The pvc pipe
Pore is made of the lower pore and upper pore of central coaxial；
The diameter of the upper pore is less than the diameter of the lower pore and is adapted with the body of rod of the center-pole, the center-pole
Body of rod activity pass through the upper pore；
The diameter of the lower pore matches with the center-pole limited block diameter；The center-pole limited block is actively located in institute
It states in lower pore.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721319816.6U CN207499828U (en) | 2017-10-13 | 2017-10-13 | A kind of high stability pressurize coring device automatically controlled |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721319816.6U CN207499828U (en) | 2017-10-13 | 2017-10-13 | A kind of high stability pressurize coring device automatically controlled |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207499828U true CN207499828U (en) | 2018-06-15 |
Family
ID=62500374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721319816.6U Expired - Fee Related CN207499828U (en) | 2017-10-13 | 2017-10-13 | A kind of high stability pressurize coring device automatically controlled |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207499828U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107514240A (en) * | 2017-10-13 | 2017-12-26 | 四川大学 | A kind of high stability pressurize coring device automatically controlled |
| CN109057736A (en) * | 2018-08-13 | 2018-12-21 | 四川大学 | Core storage barrel |
| CN109488241A (en) * | 2018-12-07 | 2019-03-19 | 深圳大学 | Fidelity coring device |
| CN112657866A (en) * | 2020-12-08 | 2021-04-16 | 苏州富强科技有限公司 | Feeding and pressure maintaining integrated assembly line |
| CN114396239A (en) * | 2022-01-29 | 2022-04-26 | 深圳大学 | Pressure-maintaining gas-retaining coring device and high-pressure pipe safe pressure relief and sealed drainage switching pipe sleeve |
-
2017
- 2017-10-13 CN CN201721319816.6U patent/CN207499828U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107514240A (en) * | 2017-10-13 | 2017-12-26 | 四川大学 | A kind of high stability pressurize coring device automatically controlled |
| CN107514240B (en) * | 2017-10-13 | 2023-10-17 | 四川大学 | Automatic high stability pressurize coring device of control |
| CN109057736A (en) * | 2018-08-13 | 2018-12-21 | 四川大学 | Core storage barrel |
| CN109057736B (en) * | 2018-08-13 | 2023-08-22 | 四川大学 | core storage barrel |
| CN109488241A (en) * | 2018-12-07 | 2019-03-19 | 深圳大学 | Fidelity coring device |
| CN109488241B (en) * | 2018-12-07 | 2024-05-14 | 深圳大学 | Fidelity coring device |
| CN112657866A (en) * | 2020-12-08 | 2021-04-16 | 苏州富强科技有限公司 | Feeding and pressure maintaining integrated assembly line |
| CN114396239A (en) * | 2022-01-29 | 2022-04-26 | 深圳大学 | Pressure-maintaining gas-retaining coring device and high-pressure pipe safe pressure relief and sealed drainage switching pipe sleeve |
| CN114396239B (en) * | 2022-01-29 | 2023-06-13 | 深圳大学 | Pressure-maintaining gas-maintaining corer and high-pressure pipe safety pressure relief and sealing drainage transfer pipe sleeve |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180615 Termination date: 20211013 |
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| CF01 | Termination of patent right due to non-payment of annual fee |