CN108266148B - Coring pressure-maintaining short circuit - Google Patents
Coring pressure-maintaining short circuit Download PDFInfo
- Publication number
- CN108266148B CN108266148B CN201810202892.1A CN201810202892A CN108266148B CN 108266148 B CN108266148 B CN 108266148B CN 201810202892 A CN201810202892 A CN 201810202892A CN 108266148 B CN108266148 B CN 108266148B
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- cylinder
- block
- inner cylinder
- coring
- short circuit
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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
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors
- E21B25/18—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors the core receiver being specially adapted for operation under water
-
- 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
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors
- E21B25/10—Formed core retaining or severing means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention relates to a coring pressure maintaining short circuit, and belongs to the technical field of coring pressure maintaining tools. The short circuit comprises an outer cylinder, a middle cylinder, an inner cylinder and a piston, wherein the middle cylinder is arranged in the outer cylinder through a shearing pin, and the inner cylinder is movably arranged in the middle cylinder; the inner cylinder is slidably provided with a piston. The coring pressure maintaining short circuit has a simple structure and good practicability, solves the problems that the traditional pressure maintaining coring device has a complex structure, the traditional pressure maintaining coring device adopts a ball valve or a flip cover to seal, the sealing mode has good effect but has a complex structure, and the core cannot be cut in the coring process; the coring pressure maintaining short circuit can reach any position along with the drill bit, is not limited to a vertical well, and is particularly suitable for coring pressure maintaining operation.
Description
Technical Field
The invention relates to a coring pressure maintaining short circuit, and belongs to the technical field of coring pressure maintaining tools.
Background
With the development of oil and gas resources by human being, the deep sea is gradually turned to the deep sea, but the deep sea has the water depth of thousands of meters, so that the petroleum storage amount under the deep sea stratum is difficult to directly measure, meanwhile, the pressure under the deep sea stratum is extremely high, the pressure is required to be maintained during coring, the core is prevented from changing the internal structure due to the change of the surrounding pressure, and the method has great significance for the research of the rock mechanical properties deep in the stratum.
At present, the traditional pressure maintaining coring device has a complex structure, and the sealing of the pressure maintaining coring device on the coring barrel is generally sealed by adopting a ball valve or a flip cover, and the sealing mode has good effect but has a complex structure and has the defect that the core cannot be cut in the coring process.
Disclosure of Invention
The invention aims at: the coring pressure-maintaining short circuit has the advantages that the structure is simple, the practicability is good, the core can be actively cut, the pressure maintaining seal can be realized for a long time, and the internal structure of the core is ensured to accurately reflect the stratum storage capacity.
The technical scheme of the invention is as follows:
the utility model provides a coring pressurize short circuit, includes urceolus, middle section of thick bamboo, inner tube and piston, its characterized in that: an intermediate cylinder is arranged in the outer cylinder through a shear pin, and an inner cylinder is movably arranged in the intermediate cylinder; the middle cylinder on be provided with the shoulder hole, the lower port internal thread of shoulder hole installs the supporting shoe, the middle piece is installed to the internal thread of middle cylinder shoulder hole in supporting shoe top, be provided with the cutting piece between middle piece and the supporting shoe, the middle section of thick bamboo internal thread of middle piece top installs interior cylinder seat, interior cylinder seat ball through ball annular movable mounting respectively on the top and the inner wall of interior cylinder seat, interior cylinder seat passes through interior cylinder seat ball and inner cylinder sliding contact connection, symmetrical form radially is provided with on the lower port of inner cylinder and beats the hole, beat the top in hole and install through last slip ejector pad and go up the packing element, beat the below in hole and install down the packing element through the slip ejector pad down, go up the last screw thread of inner cylinder at packing element top and install the fixed block, fixed block and last packing element contact connection, interior barrel slidable mounting of inner cylinder above the fixed block has the piston.
The inner wall of the outer cylinder below the shear pin is provided with a transmission block in a threaded manner, a middle cylinder corresponding to the transmission block is provided with a sliding groove, and the transmission block is connected with the middle cylinder in a sliding contact manner through the sliding groove.
The supporting block is an annular body, a baffle ring is arranged in a central hole of the supporting block in a threaded manner, and supporting block mounting grooves are symmetrically formed in the end face of the supporting block outside the baffle ring.
The cutting block is a conical body, one end of the cutting block is provided with cutting teeth, the other end of the cutting block is provided with a notch, the bottom of the cutting block is provided with a cutting block mounting groove, and a lower pushing spring is mounted between the supporting block and the cutting block through the cooperation of the supporting block mounting groove and the cutting block mounting groove.
The inner cylinder seat and the middle block are respectively provided with high-pressure runner holes which are mutually communicated.
The inner cylinder is characterized in that inner cylinder balls are arranged on the circumference of the inner cylinder at intervals, the inner cylinder is connected with the middle cylinder in a sliding contact manner through the inner cylinder balls, and ventilation holes are arranged on the circumference of the inner cylinder between the inner cylinder balls at intervals.
The upper sliding push block and the lower sliding push block are connected in a mutually sliding fit manner, ratchets are respectively arranged in the upper sliding push block, the lower sliding push block and the inner cylinder corresponding to the upper sliding push block and the lower sliding push block, and the upper sliding push block, the lower sliding push block and the inner cylinder are connected in a matched sliding manner through the ratchets.
The middle cylinder consists of a middle cylinder body and dividing plates, the dividing plates are symmetrically and fixedly arranged on the circumference of the middle cylinder body, clamping grooves are symmetrically formed in the end face of the middle cylinder body between the tops of the dividing plates, and baffle plates are movably arranged in the clamping grooves through positioning covers.
The positioning cover is annular, external threads are arranged on the circumference of the positioning cover, an assembly groove is correspondingly formed in the lower surface of the positioning cover and the upper surface of the baffle plate, and an upper pushing spring is arranged in the assembly groove.
The baffle plate and the middle cylinder body are provided with mutually communicated upper punching holes, the baffle plate below the upper punching holes is provided with lower punching holes, and the lower punching holes are arranged in a corresponding mode with the cutting blocks.
The upper end of the outer cylinder is provided with an upper air storage chamber, the outer side of the upper air storage chamber is provided with an upper air inlet valve, the inner side of the upper air storage chamber is provided with an upper air chamber communication hole, and the upper air chamber communication hole is intermittently communicated with the upper pressing hole.
The lower end of the outer cylinder is provided with a lower air storage chamber, the outer side of the lower air storage chamber is provided with a lower air inlet valve, the inner side of the lower air storage chamber is provided with a lower air chamber communication hole, and the lower air chamber communication hole is intermittently communicated with the lower pressing hole.
The invention has the beneficial effects that:
1. the inner cylinder ball is arranged around the inner cylinder, and the inner cylinder does not rotate along with the drill string during operation, so that the damage to the rock core caused by torsion can be avoided;
2. the cutting, sealing and pressure maintaining device can be triggered and actively operated after coring is completed;
3. the invention can follow the drill bit to reach any position, is not limited to a vertical well, and is suitable for most types of coring and pressure maintaining operations.
Drawings
FIG. 1 is a schematic top view of the present invention;
FIG. 2 is a schematic cross-sectional view of the A-A direction in FIG. 1;
FIG. 3 is a schematic cross-sectional view of the B-B direction in FIG. 1;
FIG. 4 is an enlarged schematic view of the structure of FIG. 3 at A;
FIG. 5 is a schematic cross-sectional view of the C-C direction of FIG. 1;
FIG. 6 is an enlarged schematic view of the structure of FIG. 5 at A;
FIG. 7 is a schematic view of the structure of the cutting block of the present invention;
FIG. 8 is a schematic structural view of an intermediate cartridge of the present invention;
fig. 9 is a schematic cross-sectional structure of the inner cylinder base of the present invention.
In the figure: 1. the device comprises an outer cylinder, 2, an intermediate cylinder, 3, an inner cylinder, 4, a piston, 5, a shear pin, 6, a supporting block, 7, a baffle ring, 8, an intermediate block, 9, a cutting block, 10, a transmission block, 11, a sliding chute, 12, a cutting tooth, 13, a notch, 14, a cutting block mounting groove, 15, a lower pushing spring, 16, an inner cylinder seat, 17, an inner cylinder seat ball, 18, a high-pressure runner hole, 19, a punching hole, 20, an upper sliding pushing block, 21, an upper rubber cylinder, 22, a lower sliding pushing block, 23, a lower rubber cylinder, 24, a fixed block, 25, an inner cylinder ball, 26, a vent hole, 27, an intermediate cylinder body, 28, a partition plate, 29, a baffle plate, 30, a positioning cover, 31, an upper pushing spring, 32, an annular runner, 33, an upper punching hole, 34, a lower punching hole, 35, an upper air storage chamber, 36, an upper air inlet valve, 37, an upper air chamber, 38, a lower air storage chamber, 39, a lower air inlet valve, 40, a lower communication hole, 41, a ball ring groove and an annular groove.
Detailed Description
The coring pressure maintaining short circuit comprises an outer cylinder 1, a middle cylinder 2, an inner cylinder 3 and a piston 4, wherein the middle cylinder 2 is arranged in the outer cylinder 1 through a shearing pin 5, a transmission block 10 is arranged on the inner wall of the outer cylinder 1 below the shearing pin 5 in a threaded manner, a sliding groove 11 is formed in the middle cylinder 2 corresponding to the transmission block 10, and the transmission block 10 is connected with the middle cylinder 2 in a sliding contact manner through the sliding groove 11. The chute 11 can perform an axial limiting function on the transmission block 10 to limit the axial stroke of the transmission block 10 and thus the axial stroke of the intermediate cylinder 2.
The inner cylinder 3 is movably arranged in the middle cylinder 2, a stepped hole is formed in the middle cylinder 2, a supporting block 6 is arranged at the lower port of the stepped hole in a threaded manner, the supporting block 6 is an annular body, a baffle ring 7 is arranged at the inner thread of the central hole of the supporting block 6, and supporting block mounting grooves are symmetrically formed in the end face of the supporting block 6 at the outer side of the baffle ring 7.
Annular middle block 8 is installed in the stepped hole of middle cylinder 2 above supporting block 6, cutting block 9 is provided between middle block 8 and supporting block 6, cutting block 9 is the conical body, one end of cutting block 9 is provided with cutting tooth 12, the other end of cutting block 9 is provided with notch 13, the bottom of cutting block 9 is provided with cutting block mounting groove 14, push spring 15 is installed down through the cooperation of supporting block mounting groove and cutting block mounting groove 14 between supporting block 6 and the cutting block 9. During operation, the cutting block 9 can slide inwards along the mounting groove under the action of external force.
An inner cylinder seat 16 is arranged on the middle cylinder 2 above the middle block 8 in a threaded manner, and high-pressure runner holes 18 which are mutually communicated are respectively arranged on the inner cylinder seat 16 and the middle block 8. The top and the inner wall of the inner cylinder seat 16 are respectively movably provided with an inner cylinder seat ball 17 through a ball ring groove 41, the inner cylinder seat 16 is connected with the inner cylinder 3 in a sliding contact manner through the inner cylinder seat ball 17, the circumference of the inner cylinder 3 is provided with inner cylinder balls 25 at intervals, the inner cylinder 3 is connected with the middle cylinder 2 in a sliding contact manner through the inner cylinder balls 25, and ventilation holes 26 are arranged at intervals on the circumference of the inner cylinder 3 between the inner cylinder balls 25.
The lower port of the inner cylinder 3 is symmetrically and radially provided with a pressing hole 19, and the pressing hole 19 is communicated with the high-pressure runner hole 18; the upper rubber cylinder 21 is arranged above the pressing hole 19 through the upper sliding push block 20, the lower rubber cylinder 23 is arranged below the pressing hole 19 through the lower sliding push block 22, the annular fixed block 24 is arranged on the inner cylinder 3 at the top of the upper rubber cylinder 21 in a threaded manner, the fixed block 24 is in contact connection with the upper rubber cylinder 21, the upper sliding push block 20 and the lower sliding push block 22 are in sliding fit connection with each other, ratchets are respectively arranged in the upper sliding push block 20, the lower sliding push block 22 and the inner cylinder 3 corresponding to the upper sliding push block 20 and the lower sliding push block 22, the upper sliding push block 20, the lower sliding push block 22 and the inner cylinder 3 are in sliding connection through the matching of the ratchets, and in the working process, the upper sliding push block 20 and the lower sliding push block 22 can respectively move upwards and downwards under the action of external force but cannot reset, so that the upper sliding push block 20 and the lower sliding push block 22 are locked. A piston 4 is slidably mounted in the inner cylinder 3 above the fixed block 24.
The middle cylinder 2 of the coring pressure-maintaining short circuit consists of a middle cylinder body 27 and a dividing plate 28, the dividing plate 28 is symmetrically and fixedly arranged on the circumference of the middle cylinder body 27, fan-shaped clamping grooves are symmetrically formed in the end face of the middle cylinder body 27 between the tops of the dividing plate 28, and fan-shaped baffle plates 29 are movably arranged in the clamping grooves through positioning covers 30.
The positioning cover 30 is annular, external threads are arranged on the circumference of the positioning cover 30 and used for being connected with the dividing plate 28, an assembly groove is correspondingly arranged on the lower surface of the positioning cover 30 and the upper surface of the baffle plate 29, and an upper pushing spring 31 is arranged in the assembly groove. After the middle cylinder 2 is assembled in the outer cylinder 1, the inner wall of the outer cylinder 1 is in clearance fit with the dividing plates 28 to form an annular flow passage 32 for drilling fluid to pass through, under the normal state, the baffle plate 29 is in an inward contracted state under the action of the upper pushing spring 31, so that the annular flow passage is ensured to be smooth, and under the action of external force, the baffle plate 29 extends outwards, so that the upper port of the annular flow passage 32 is blocked.
The baffle plate 29 and the middle cylinder body 27 are provided with mutually communicated upper punching holes 33, the baffle plate 29 below the upper punching holes 33 is provided with lower punching holes 34, and the lower punching holes 34 are correspondingly arranged with the cutting blocks 9.
The upper end of the outer cylinder 1 of the coring pressure maintaining short circuit is provided with an upper air storage chamber 35, the outer side of the upper air storage chamber 35 is provided with an upper air inlet valve 36, the inner side of the upper air storage chamber 35 is provided with an upper air chamber communication hole 37, and the upper air chamber communication hole 37 is intermittently communicated with the upper pressurizing hole 33.
The lower end of the outer cylinder 1 is provided with a lower air storage chamber 38, the outer side of the lower air storage chamber 38 is provided with a lower air inlet valve 39, the inner side of the lower air storage chamber 38 is provided with a lower air chamber communication hole 40, and the lower air chamber communication hole 40 is intermittently communicated with the lower pressing hole 34.
The inner wall of the port at the two ends of the outer barrel 1 of the coring pressure-maintaining short joint is respectively provided with an internal thread, the internal thread is used for being connected with a drill string and a coring bit, and starting to drill and core along with the drill bit to a designated position, drilling fluid acts on the drill bit through an annular flow passage 32, and in the process of drilling and core, the core can be cut and maintained pressure through a cutting block 9, and the method specifically comprises the following steps:
firstly, pre-storing high-pressure gas in an upper gas storage chamber 35 and a lower gas storage chamber 38 on an outer cylinder 1; the high pressure gas of the upper gas storage chamber 35 is used for providing pressure for the inner cylinder 3 to keep the pressure of the rock core, and the high pressure gas of the lower gas storage chamber 38 is used for providing thrust for the cutting block 9 and the rubber cylinder. In the working process, the drill column drives the coring bit to rotate through the outer barrel 1, the outer barrel 1 drives the middle barrel 2 to rotate through the transmission block 10, the rock core slowly enters the inner barrel 3, and as the inner barrel 3 is provided with inner barrel balls 25 at intervals on the circumference, the inner barrel 3 is connected with the middle barrel 2 in a sliding contact manner through the inner barrel balls 25, and the inner barrel 3 is in a static state relative to the middle barrel 2 under the action of the resistance of the rock core along with the rock core entering the inner barrel 3, namely, the inner barrel 3 does not rotate along with the middle barrel 2, so that the rock core can be prevented from being twisted off in the coring process; as the core continuously enters the inner barrel 3, the core gradually pushes the piston 4 to move upwards until the piston 4 extends out of the central hole of the positioning cover 30; during the extension of the piston 4 from the central hole of the positioning cap 30, the barrier 29 is pressed, forcing it to extend outwards along the fitting groove, thus forming a closure for the upper port of the annular flow channel 32.
After the baffle 29 seals the upper port of the annular flow passage 32, the flow passage of the drilling fluid is stopped, and at the moment, the drilling fluid forms pressure holding above the positioning cover 30; when the pressure reaches a certain value, the shearing pin 5 between the middle cylinder 2 and the outer cylinder 1 is cut off, and the whole middle cylinder 2 and the whole inner cylinder 3 descend through the chute 11.
When the upper dead center of the chute 11 contacts with the transmission block 10, the whole of the intermediate tube 2 and the inner tube 3 is stopped from descending, at this time, the upper air chamber communication hole 37 is in fit communication with the upper pressing hole 33, and the lower air chamber communication hole 40 is in fit communication with the lower pressing hole 34.
After the upper air chamber communication hole 37 is anastomosed and communicated with the upper pressing hole 33, high-pressure air in the upper air storage chamber 35 enters a gap between the middle cylinder 2 and the inner cylinder 3 through the upper air chamber communication hole 37 and the upper pressing hole 33 and then enters the inner cylinder 3 through the vent hole 26, so that pressure is provided for the inner cylinder 3 to achieve the purpose of pressure maintaining after the core is cut.
After the air chamber communication hole 40 is anastomosed and communicated with the lower pressing hole 34, high-pressure air in the lower air storage chamber 38 acts on the notch 13 of the cutting block 9 through the lower air chamber communication hole 40 and the lower pressing hole 34, so that the cutting block 9 is pushed to move forward (shrink) in opposite directions, and the cutting teeth 12 of the cutting block 9 are fully contacted with the rock core, in the process, the blocking state of the cutting block 9 on the lower port of the high-pressure runner hole 18 of the middle block 8 is relieved, the lower port of the high-pressure runner hole 18 of the middle block 8 is in an open state, and the high-pressure air entering through the lower air chamber communication hole 40 and the lower pressing hole 34 enters through the lower port of the high-pressure runner hole 18 of the middle block 8 and then enters into the pressing hole 19 of the inner cylinder 3 through the high-pressure runner hole 18 of the inner cylinder seat 16.
The high-pressure gas entering the pressing hole 19 pushes the upper sliding pushing block 20 above the pressing hole 19 to move upwards so as to compress the sizing cylinder 21 to deform, thereby holding the core above the pressing hole 19 and realizing sealing, and meanwhile, the high-pressure gas entering the pressing hole 19 pushes the lower sliding pushing block 22 below the pressing hole 19 to move downwards so as to compress the lower sizing cylinder 23 to deform, thereby holding the core below the pressing hole 19 and realizing sealing.
Because the upper sliding push block 20, the lower sliding push block 22 and the inner cylinder 3 corresponding to the upper sliding push block 20 and the lower sliding push block 22 are respectively provided with ratchets, the upper sliding push block 20, the lower sliding push block 22 and the inner cylinder 3 are in matched sliding connection through ratchets, after the upper sliding push block 20 ascends to compress the upper rubber cylinder 21 to deform, and after the lower sliding push block 22 descends to compress the lower rubber cylinder 23 to deform, the upper sliding push block 20 and the lower sliding push block 22 respectively form self-locking under the action of the ratchets, so that the compression state of the upper rubber cylinder 21 and the lower rubber cylinder 23 is maintained.
Meanwhile, in the process that the cutting block 9 rotates along with the middle cylinder 2, the core entering the short joint is gradually cut off, and the core can be taken out after the drilling is started. The coring pressure maintaining short circuit has a simple structure and good practicability, solves the problems that the traditional pressure maintaining coring device has a complex structure, the traditional pressure maintaining coring device adopts a ball valve or a flip cover to seal, the sealing mode has good effect but has a complex structure, and the core cannot be cut in the coring process; the coring pressure maintaining short circuit can reach any position along with the drill bit, is not limited to a vertical well, and is particularly suitable for coring pressure maintaining operation.
Claims (8)
1. The utility model provides a coring pressurize short circuit, includes urceolus (1), middle section of thick bamboo (2), inner tube (3) and piston (4), its characterized in that: an intermediate cylinder (2) is arranged in the outer cylinder (1) through a shearing pin (5), and an inner cylinder (3) is movably arranged in the intermediate cylinder (2); the middle cylinder (2) is provided with a stepped hole, a supporting block (6) is arranged at the lower port of the stepped hole in an internal thread manner, a middle block (8) is arranged at the upper part of the supporting block (6) in the stepped hole in the middle cylinder (2), a cutting block (9) is arranged between the middle block (8) and the supporting block (6), an inner cylinder seat (16) is arranged at the inner thread of the middle cylinder (2) above the middle block (8), inner cylinder seat balls (17) are respectively and movably arranged at the top and the inner wall of the inner cylinder seat (16) through ball ring grooves (41), the inner cylinder seat (16) is connected with the inner cylinder (3) in a sliding contact manner through the inner cylinder seat balls (17), a pressing hole (19) is symmetrically and radially arranged at the lower port of the inner cylinder (3), an upper rubber cylinder (21) is arranged above the pressing hole (19) through an upper sliding pushing block (20), a lower rubber cylinder (23) is arranged below the pressing hole (19) through a lower sliding pushing block (22), a fixed block (24) is arranged at the upper part of the inner cylinder (3) at the top of the upper rubber cylinder (21), and a piston (4) is fixedly connected with the upper cylinder (24) in a sliding manner;
a transmission block (10) is arranged on the inner wall of the outer cylinder (1) below the shear pin (5) in a threaded manner, a sliding groove (11) is formed in the middle cylinder (2) corresponding to the transmission block (10), and the transmission block (10) is connected with the middle cylinder (2) in a sliding contact manner through the sliding groove (11);
the supporting block (6) is an annular body, a baffle ring (7) is arranged in a central hole of the supporting block (6) in a threaded manner, and supporting block mounting grooves are symmetrically formed in the end face of the supporting block (6) at the outer side of the baffle ring (7); the cutting block (9) is a conical body, one end of the cutting block (9) is provided with cutting teeth (12), the other end of the cutting block (9) is provided with a notch (13), the bottom of the cutting block (9) is provided with a cutting block mounting groove (14), and a lower pushing spring (15) is mounted between the supporting block (6) and the cutting block (9) through the cooperation of the supporting block mounting groove and the cutting block mounting groove (14).
2. The coring pressure maintaining short circuit according to claim 1, wherein: the inner cylinder seat (16) and the middle block (8) are respectively provided with high-pressure runner holes (18) which are communicated with each other; inner cylinder balls (25) are arranged on the circumference of the inner cylinder (3) at intervals, the inner cylinder (3) is connected with the middle cylinder (2) in a sliding contact manner through the inner cylinder balls (25), and ventilation holes (26) are arranged on the circumference of the inner cylinder (3) between the inner cylinder balls (25) at intervals.
3. The coring pressure maintaining short circuit according to claim 1, wherein: the upper sliding pushing block (20) and the lower sliding pushing block (22) are connected in a mutually sliding fit mode, ratchets are respectively arranged on the inner walls of the upper sliding pushing block (20), the lower sliding pushing block (22) and the inner cylinder (3) corresponding to the upper sliding pushing block (20) and the lower sliding pushing block (22), and the upper sliding pushing block (20), the lower sliding pushing block (22) and the inner cylinder (3) are connected in a matched sliding mode through the ratchets.
4. The coring pressure maintaining short circuit according to claim 1, wherein: the middle cylinder (2) is composed of a middle cylinder body (27) and a partition plate (28), the partition plate (28) is symmetrically and fixedly arranged on the circumference of the middle cylinder body (27), clamping grooves are symmetrically formed in the end face of the middle cylinder body (27) between the tops of the partition plates (28), and a baffle plate (29) is movably arranged in the clamping grooves through a positioning cover (30).
5. The coring pressure maintaining short circuit according to claim 4, wherein: the positioning cover (30) is annular, external threads are arranged on the circumference of the positioning cover (30), an assembly groove is correspondingly formed in the lower surface of the positioning cover (30) and the upper surface of the baffle plate (29), and an upper pushing spring (31) is arranged in the assembly groove.
6. The coring pressure maintaining short circuit according to claim 5, wherein: the baffle plate (29) and the middle cylinder body (27) are provided with mutually communicated upper punching holes (33), the baffle plate (29) below the upper punching holes (33) is provided with lower punching holes (34), and the lower punching holes (34) are arranged in a corresponding mode with the cutting blocks (9).
7. The coring pressure maintaining short circuit according to claim 1, wherein: the upper end of the outer cylinder (1) is provided with an upper air storage chamber (35), the outer side of the upper air storage chamber (35) is provided with an upper air inlet valve (36), the inner side of the upper air storage chamber (35) is provided with an upper air chamber communication hole (37), and the upper air chamber communication hole (37) is intermittently communicated with the upper pressing hole (33).
8. The coring pressure maintaining short circuit according to claim 1, wherein: the lower end of the outer cylinder (1) is provided with a lower air storage chamber (38), the outer side of the lower air storage chamber (38) is provided with a lower air inlet valve (39), the inner side of the lower air storage chamber (38) is provided with a lower air chamber communication hole (40), and the lower air chamber communication hole (40) is intermittently communicated with the lower pressing hole (34).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810202892.1A CN108266148B (en) | 2018-03-13 | 2018-03-13 | Coring pressure-maintaining short circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810202892.1A CN108266148B (en) | 2018-03-13 | 2018-03-13 | Coring pressure-maintaining short circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108266148A CN108266148A (en) | 2018-07-10 |
| CN108266148B true CN108266148B (en) | 2023-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810202892.1A Active CN108266148B (en) | 2018-03-13 | 2018-03-13 | Coring pressure-maintaining short circuit |
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| CN (1) | CN108266148B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB693379A (en) * | 1950-10-19 | 1953-07-01 | Anglo Iranian Oil Co Ltd | Improvements relating to pressure core takers |
| CN203626674U (en) * | 2013-11-19 | 2014-06-04 | 中国石油集团长城钻探工程有限公司 | Heat-preservation and pressure-preservation composite inner cylinder enabling core to be taken out through cutting |
| CN104179469A (en) * | 2014-08-07 | 2014-12-03 | 中国海洋石油总公司 | Active pressure maintaining and coring tool and use method thereof |
| CN105041252A (en) * | 2015-07-30 | 2015-11-11 | 中国石油集团长城钻探工程有限公司 | Internally-lifting safety assembly for pressure-maintaining coring |
| CN107514240A (en) * | 2017-10-13 | 2017-12-26 | 四川大学 | A kind of high stability pressurize coring device automatically controlled |
-
2018
- 2018-03-13 CN CN201810202892.1A patent/CN108266148B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB693379A (en) * | 1950-10-19 | 1953-07-01 | Anglo Iranian Oil Co Ltd | Improvements relating to pressure core takers |
| CN203626674U (en) * | 2013-11-19 | 2014-06-04 | 中国石油集团长城钻探工程有限公司 | Heat-preservation and pressure-preservation composite inner cylinder enabling core to be taken out through cutting |
| CN104179469A (en) * | 2014-08-07 | 2014-12-03 | 中国海洋石油总公司 | Active pressure maintaining and coring tool and use method thereof |
| CN105041252A (en) * | 2015-07-30 | 2015-11-11 | 中国石油集团长城钻探工程有限公司 | Internally-lifting safety assembly for pressure-maintaining coring |
| CN107514240A (en) * | 2017-10-13 | 2017-12-26 | 四川大学 | A kind of high stability pressurize coring device automatically controlled |
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| Publication number | Publication date |
|---|---|
| CN108266148A (en) | 2018-07-10 |
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