CN113175307B - Rotary seal core lifting mechanism - Google Patents
Rotary seal core lifting mechanism Download PDFInfo
- Publication number
- CN113175307B CN113175307B CN202110477165.8A CN202110477165A CN113175307B CN 113175307 B CN113175307 B CN 113175307B CN 202110477165 A CN202110477165 A CN 202110477165A CN 113175307 B CN113175307 B CN 113175307B
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- rod
- rotary
- piston rod
- joint
- piston
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- 238000005553 drilling Methods 0.000 claims abstract description 19
- 238000007789 sealing Methods 0.000 claims description 8
- 239000010720 hydraulic oil Substances 0.000 abstract description 5
- 239000003921 oil Substances 0.000 abstract description 3
- 238000004088 simulation Methods 0.000 abstract description 2
- 230000001174 ascending effect Effects 0.000 abstract 1
- 238000011065 in-situ storage Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 239000011435 rock Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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 or core extractors
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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 or core extractors
- E21B25/10—Formed core retaining or severing means
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a rotary seal core lifting mechanism which comprises a drill rod, wherein a drill rod cavity is arranged in the drill rod, the upper end and the lower end of the drill rod cavity are opened, a rotary piston rod is arranged in the drill rod cavity, and the upper end of the rotary piston rod is connected with the drill rod cavity through a piston; the rotary rod is arranged in the rotary piston rod, the rotary rod is inserted into the rotary piston rod and connected with the rotary rod joint, the rotary rod joint is connected with the inner wall of the rotary piston rod in a sliding mode, a rotary limiting mechanism is arranged between the rotary rod joint and the inner wall of the rotary piston rod, the lower end of the rotary piston rod is connected with the piston rod joint, the lower end of the rotary rod joint is connected with the core lifting rod, and the core lifting rod penetrates through the piston rod joint and is connected with the drill rod cavity joint. This scheme is used for the laboratory simulation to bore coring deeply, and whole core mechanism of carrying provides decurrent drilling pressure and ascending core pressure of carrying through the oil pressure difference of hydraulic oil, can guarantee the steady operation of mechanism, realizes the control of the stability and the safety of fidelity corer operational environment.
Description
Technical Field
The invention relates to the technical field of drilling, in particular to a rotary seal core lifting mechanism.
Background
The in-situ rock mechanical behavior rule of different-depth occurrence rock layers is the guiding science and the important theoretical basis of deep drilling, deep resource development and utilization and earth application science, and the core and the key of the in-situ rock mechanical behavior rule are how to obtain an in-situ rock core under a deep environment condition and carry out real-time loading test and analysis under an in-situ fidelity state. However, when the in-situ core is obtained, the temperature, pressure, moisture, quality and light preservation (five-guarantee) while drilling are required, which puts strict requirements on a core lifting mechanism of the deep coring equipment.
However, the core lifting mechanism in the prior art is unstable in the operation process, so that the deep in-situ coring equipment cannot be reliably guaranteed and stably operated in a deep engineering environment and a simulation test environment, even the five-protection state of the internal core can be changed, and even the whole equipment is irreversibly damaged. Therefore, a rotary seal core lifting mechanism which can stably and reliably operate for a long time needs to be established.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention provides a rotary seal core-lifting mechanism which utilizes pressure difference to realize core-lifting movement.
In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows:
the rotary sealing core lifting mechanism comprises a drill rod, wherein a drill rod cavity is arranged in the drill rod, the upper end and the lower end of the drill rod cavity are open, a rotary piston rod is arranged in the drill rod cavity, the rotary piston rod is of a hollow structure, the upper end of the rotary piston rod is connected with the drill rod cavity through a piston, and the piston is in sliding connection with the inner wall of the drill rod cavity; the rotary rod is arranged in the rotary piston rod, the rotary rod is inserted into the rotary piston rod and connected with the rotary rod joint, the rotary rod joint is connected with the inner wall of the rotary piston rod in a sliding mode, a rotary limiting mechanism is arranged between the rotary rod joint and the inner wall of the rotary piston rod, the lower end of the rotary piston rod is connected with the piston rod joint, the lower end of the rotary rod joint is connected with the core lifting rod, and the core lifting rod penetrates through the piston rod joint and is connected with the drill rod cavity joint.
The invention has the beneficial effects that: the rotary piston rod is used for simulating deep ground drilling and coring in a laboratory, when the rotary piston rod starts to work, the initial position of the rotary piston rod is located at the uppermost end of a drill rod cavity, pressure is applied to the upper side of the piston through hydraulic oil, the rotary piston rod is driven to move downwards, and then a connector of the drill rod cavity is driven to move downwards; meanwhile, the rotary rod rotates to drive the rotary piston rod and the drill rod cavity joint to rotate, and the action of drilling underground is achieved. After the drilling action is finished, the pressure above the piston is reduced, the pressure below the piston is increased, the rotating piston rod is driven to move upwards, the positions of the rotating rod and the drill rod cavity joint are unchanged, and the core lifting action is realized. The whole core lifting mechanism provides downward drilling pressure and upward core lifting pressure through the oil pressure difference of hydraulic oil, so that the stable operation of the mechanism can be ensured, and the stable and safe control of the operating environment of the fidelity core extractor is realized.
Drawings
Fig. 1 is a cross-sectional view of a rotary seal core lifter.
Fig. 2 is a structural view of the piston.
Fig. 3 is a structural view of the connection of the piston rod joint and the rotary piston rod.
Fig. 4 is a structural view of a piston rod joint.
FIG. 5 is a block diagram of a tool pipe cavity joint.
The device comprises a rotary rod 1, a rotary rod 2, a drill rod 3, a rotary piston rod 4, a rotary rod joint 5, a piston rod joint 6, a lifting rod 7, a drill rod cavity joint 8, a piston 9, a limit baffle 10, a baffle table 11, a placing groove 12, a sealing ring 13 and a mounting hole.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
As shown in fig. 1 to 5, the rotary seal core lifting mechanism of the scheme comprises a drill rod 2, a drill rod cavity is arranged in the drill rod 2, the upper end and the lower end of the drill rod cavity are open, a rotary piston rod 3 is arranged in the drill rod cavity, the rotary piston rod 3 is of a hollow structure, the upper end of the rotary piston rod 3 is connected with the drill rod cavity through a piston 8, and the piston 8 is in sliding connection with the inner wall of the drill rod cavity; be provided with rotary rod 1 in the rotating piston rod 3, rotary rod 1 inserts in the rotating piston rod 3 and is connected with rotary rod joint 4, rotary rod joint 4 and rotating piston rod 3's inner wall sliding connection, and be provided with rotatory stop gear between rotary rod joint 4 and the inner wall of rotating piston rod 3, the lower extreme and the piston rod of rotating piston rod 3 connect 5 and be connected, rotary rod joint 4's lower extreme with carry core rod 6 and be connected, it passes piston rod joint 5 and is connected with drilling rod chamber joint 7 to carry core rod 6.
The rotary piston rod 3 is used for simulating deep ground drilling and coring in a laboratory, when the rotary piston rod works, the initial position of the rotary piston rod 3 is located at the uppermost end of a drill rod cavity, pressure is applied to the upper side of a piston 8 through hydraulic oil, the rotary piston rod 3 is driven to move downwards, and then a drill rod cavity joint 7 is driven to move downwards; meanwhile, the rotating rod 1 rotates to drive the rotating piston rod 3 and the drill rod cavity joint 7 to rotate, and the underground drilling action is realized. After the drilling action is finished, the pressure above the piston 8 is reduced, the pressure below the piston 8 is increased, the rotating piston rod 3 is driven to move upwards, and the positions of the rotating rod 1 and the drill rod cavity joint 7 are unchanged, so that the core lifting action is realized. The whole core lifting mechanism provides downward drilling pressure and upward core lifting pressure through the oil pressure difference of hydraulic oil, so that the stable operation of the mechanism can be ensured, and the stable and safe control of the operating environment of the fidelity core extractor is realized.
The piston 8 of this scheme is overlapped in the upper end of rotating piston rod 3, and the upper end of rotating piston rod 3 is provided with limit baffle 9, and limit baffle 9's size is greater than rotating piston rod 3's size, and limit baffle 9's size is less than piston 8's size, and limit baffle 9 passes through the screw to be connected with rotating piston rod 3's lateral wall. The piston 8 is stably fixed at the end part of the rotary piston rod 3 through the limit baffle 9, so that the piston 8 moves stably.
The rotary limiting mechanism comprises a plurality of first bosses arranged on the outer circumference of the rotary rod joint 4, the first bosses are evenly distributed in the circumferential direction, a plurality of first grooves are formed in the inner wall of the rotary piston rod 3, the first grooves are extended along the length of the rotary piston rod 3, and the first bosses are embedded into the first grooves to be matched with the first grooves. The first boss and the first groove are matched to limit the rotation of the rotary piston rod 3, so that the rotary piston rod 3 and the rotary rod 1 do not rotate relatively, and the rotary piston rod 3 can only move up and down.
The size of rotary rod joint 4 is greater than the size of rotary rod 1, and the upper end of rotary piston rod 3 is provided with keeps off the platform 10 that carries out spacing to rotary rod joint 4, keeps off the platform 10 and can carry out spacing to the position that rotary piston rod 3 descends. The rotary piston rod 3 is inserted into a mounting hole 13 formed in the upper end of the piston rod joint 5, the mounting hole 13 is in interference fit with the rotary piston rod 3, and a placing groove 11 for placing the drill rod cavity joint 7 is formed in the lower end of the piston rod joint 5; in the process of drilling, the drill rod cavity joint 7 is placed in the placing groove 11, and the core lifting rod 6 is prevented from being bent by pressure generated in the process of drilling.
The circumference that the drilling rod chamber connects 7 is provided with a plurality of second bosss, a plurality of second boss circumference evenly distributed, and the second boss connects 7's length distribution along the drilling rod chamber, is provided with a plurality of second recesses along length direction in the standing groove 11, and the second boss imbeds second recess fit in. The second boss is matched with the second groove to rotate in a limiting mode, and relative rotation is avoided.
Be provided with the through-hole between standing groove 11 and the mounting hole 13, carry core rod 6 and pass the through-hole, carry also to be provided with sealing washer 12 between core rod 6 and the through-hole, sealing washer 12 can effectively seal to 3 insides of rotating piston rod. The upper end of the lifting core rod 6 is provided with an outward-turned hanging lug, and the size of the hanging lug is smaller than that of the through hole. In the process of lifting the drill rod 2, the hanging lug props against the upper end of the through hole to provide upward lifting force.
Claims (9)
1. A rotary seal core lifting mechanism is characterized by comprising a drill rod, wherein a drill rod cavity is arranged in the drill rod, the upper end and the lower end of the drill rod cavity are open, a rotary piston rod is arranged in the drill rod cavity, the rotary piston rod is of a hollow structure, the upper end of the rotary piston rod is connected with the drill rod cavity through a piston, and the piston is in sliding connection with the inner wall of the drill rod cavity; be provided with the rotary rod in the swivel piston rod, the rotary rod inserts in the swivel piston rod and is connected with rotary rod joint, rotary rod joint and swivel piston rod's inner wall sliding connection, and be provided with rotatory stop gear between rotary rod joint and swivel piston rod's the inner wall, swivel piston rod's lower extreme and piston rod articulate, rotary rod joint's lower extreme with carry the core rod and be connected, carry the core rod and pass piston rod joint and drilling rod chamber articulate.
2. The rotary seal core lifting mechanism according to claim 1, wherein the piston sleeve is arranged at the upper end of the rotary piston rod, a limit baffle is arranged at the upper end of the rotary piston rod, the size of the limit baffle is larger than that of the rotary piston rod, the size of the limit baffle is smaller than that of the piston, and the limit baffle is connected with the side wall of the rotary piston rod through a screw.
3. The rotary seal core lifting mechanism according to claim 1, wherein sealing rings are disposed between the piston and the outer wall of the rotary piston rod, between the piston and the drill rod cavity, and between the rotary rod and the upper end of the rotary piston rod.
4. The rotary seal core lifting mechanism according to claim 1, wherein the rotary limiting mechanism comprises a plurality of first bosses disposed on the outer circumference of the rotary rod joint, the first bosses are circumferentially and uniformly distributed, a plurality of first grooves are disposed on the inner wall of the rotary piston rod, the first grooves extend along the length of the rotary piston rod, and the first bosses are embedded in the first grooves for matching.
5. The rotary seal core lifting mechanism according to claim 4, wherein the size of the rotary rod joint is larger than that of the rotary rod, and a stop table for limiting the rotary rod joint is arranged at the upper end of the rotary piston rod.
6. The rotary seal core lifting mechanism according to claim 1, wherein the rotary piston rod is inserted into a mounting hole formed at an upper end of the piston rod joint, the mounting hole is in interference fit with the rotary piston rod, and a placing groove for placing the drill rod cavity joint is formed at a lower end of the piston rod joint.
7. The rotary seal core lifting mechanism according to claim 6, wherein a plurality of second bosses are arranged on the circumference of the drill pipe cavity joint, the second bosses are evenly distributed on the circumference, the second bosses are distributed along the length of the drill pipe cavity joint, a plurality of second grooves are arranged in the placing groove along the length direction, and the second bosses are embedded in the second grooves for matching.
8. The rotary seal core lifting mechanism according to claim 6, wherein a through hole is arranged between the placing groove and the mounting hole, the core lifting rod penetrates through the through hole, and a sealing ring is also arranged between the core lifting rod and the through hole.
9. The rotary seal core lifting mechanism according to claim 8, wherein an outward-turned hanging lug is arranged at the upper end of the core lifting rod, and the size of the hanging lug is smaller than that of the through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110477165.8A CN113175307B (en) | 2021-04-29 | 2021-04-29 | Rotary seal core lifting mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110477165.8A CN113175307B (en) | 2021-04-29 | 2021-04-29 | Rotary seal core lifting mechanism |
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| Publication Number | Publication Date |
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| CN113175307A CN113175307A (en) | 2021-07-27 |
| CN113175307B true CN113175307B (en) | 2022-04-15 |
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| CN202110477165.8A Active CN113175307B (en) | 2021-04-29 | 2021-04-29 | Rotary seal core lifting mechanism |
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| Country | Link |
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| CN (1) | CN113175307B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113803010B (en) * | 2021-09-30 | 2022-05-24 | 四川大学 | Deep in-situ environment high-temperature and high-pressure simulation cabin |
| CN114023124B (en) * | 2021-09-30 | 2022-10-04 | 四川大学 | In-situ self-triggering film-forming while-drilling quality-guaranteeing coring simulation device and coring method |
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