CN112901100A - Split type static-pressure slurry coring tool and method - Google Patents
Split type static-pressure slurry coring tool and method Download PDFInfo
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- CN112901100A CN112901100A CN202110266593.6A CN202110266593A CN112901100A CN 112901100 A CN112901100 A CN 112901100A CN 202110266593 A CN202110266593 A CN 202110266593A CN 112901100 A CN112901100 A CN 112901100A
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000002002 slurry Substances 0.000 title claims description 11
- 238000007789 sealing Methods 0.000 claims abstract description 39
- 241001449342 Chlorocrambe hastata Species 0.000 claims abstract description 35
- 238000010008 shearing Methods 0.000 claims abstract description 24
- 230000003068 static effect Effects 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 230000002706 hydrostatic effect Effects 0.000 claims description 9
- 210000004907 gland Anatomy 0.000 claims description 3
- 238000005553 drilling Methods 0.000 description 7
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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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
- E21B25/18—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors the core receiver being specially adapted for operation under water
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- 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
- E21B25/02—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors the core receiver being insertable into, or removable from, the borehole without withdrawing the drilling pipe
-
- 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
- E21B25/08—Coating, freezing, consolidating cores; Recovering uncontaminated cores or cores at formation pressure
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (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)
- Earth Drilling (AREA)
Abstract
The invention discloses a split type mud static pressure coring tool and a method, wherein the tool comprises an outer pipe and an inner pipe assembly arranged in the outer pipe, a seat ring, a water hole and a drill bit are sequentially arranged on the outer pipe from top to bottom, the seat ring is fixedly arranged on the inner wall of the upper end of the outer pipe, the drill bit is positioned at the lowest end of the outer pipe and is fixedly arranged on the outer wall of the outer pipe, the inner pipe assembly comprises a fishing spearhead, a shearing pin inner sleeve, a long sleeve sealing sleeve, an outer pipe sealing seat, a first long sleeve, a fixing pin, a locking sleeve, a second long sleeve, a core pipe, an inner pipe, a piston head, a snap spring and a press-in pipe shoe, the lower end of the fishing spearhead is fixedly connected with the first long sleeve and the shearing pin inner sleeve respectively, and the fishing spearhead is hung. The core taking device can greatly improve the core taking length in each time, thereby improving the core taking efficiency, saving the operation time, ensuring the original state of the core and avoiding the disturbance of the core taking tool to the core.
Description
Technical Field
The invention relates to the technical field of ocean sampling devices, in particular to a split type mud static pressure coring tool and a method.
Background
With the demand for marine resource exploration, the workload of coring (sampling) by scientific investigation ships such as drilling ships and the like is increasing day by day, and the quality of coring is directly related to the accuracy and scientificity of sample component analysis and research. In the existing coring device, coring is generally performed by rotating the whole drill string, and energy (power) of the coring device is transmitted on the drill string from an energy source (power) of a wellhead power device. In the process of energy transfer, energy loss along the stroke is large, and when the stratum is deep, the energy utilization rate of the drill string penetrating into the stratum is low, so that extra energy consumption is caused or deeper stratum exploration cannot be carried out. Meanwhile, the rotary drilling coring mode easily causes disturbance to the stratum, further causes disturbance to the sample, influences the coring quality, also in the existing coring device, causes the phenomenon of disturbance to the sample ubiquitous, and needs to be improved urgently. At present, in the field of marine coring, a drilling ship carries a coring device to complete the coring, the height of a derrick and the limit of the up-down stroke of a top drive are limited, the coring length of the conventional coring tool is limited, and the depth of the coring tool extending into a coring stratum is limited, so that the operation efficiency is influenced.
Disclosure of Invention
In view of the shortcomings of the prior art, the invention aims to provide a split type static mud pressure coring tool which can solve the problems of avoiding disturbance to a sample and improving the coring length.
The technical scheme for realizing the purpose of the invention is as follows: a split type static mud coring tool comprises an outer pipe and an inner pipe assembly arranged in the outer pipe,
the outer tube is sequentially provided with a seat ring, a water hole and a drill bit from top to bottom, the seat ring is fixedly arranged on the inner wall of the upper end of the outer tube, the water hole is positioned at the lower end of the outer tube and communicates the inner cavity of the outer tube with the outside, the drill bit is positioned at the lowest end of the outer tube and is fixedly arranged on the outer wall of the outer tube,
the inner pipe assembly comprises a fishing spearhead, a shearing pin inner sleeve, a long sleeve sealing sleeve, an outer pipe sealing seat, a first long sleeve, a fixing pin, a locking sleeve, a second long sleeve, a core pipe, an inner pipe, a piston head, a clamp spring and a press-in pipe shoe,
two sides of the fishing spearhead are respectively provided with a slurry channel, the slurry channels are used for communicating an inner cavity of an outer tube at the upper end of the fishing spearhead with an inner cavity of an outer tube at the lower end of the fishing spearhead, the lower end of the fishing spearhead is respectively fixedly connected with a first long sleeve and a shearing pin inner sleeve, the fishing spearhead is hung on the seat ring, so that the whole inner tube assembly is hung and installed in the inner cavity of the outer tube, the first long sleeve penetrates through the shearing pin inner sleeve and extends along the axial direction of the outer tube, the lower end of the first long sleeve is fixedly connected with the upper end of a second long sleeve,
the shear pin inner sleeve is connected with the first long sleeve through a shear pin, the lower end of the shear pin inner sleeve is fixedly connected with the upper end of the long sleeve sealing sleeve, the lower end of the long sleeve sealing sleeve is fixedly connected with the upper end of the outer tube sealing seat, the lower end of the outer tube sealing seat is fixedly connected with the core tube and the inner tube respectively, the core tube is located in the inner tube, the lower end of the second long sleeve is fixedly connected with the piston head, the first long sleeve and the second long sleeve penetrate through the core tube, the piston head is located in the core tube and the inner tube, the piston head is tightly attached to the inner wall of the core tube, the lower end of the core tube and the lower end of the inner tube are fixedly connected with the clamp springs, the clamp springs are located below the piston head and at the lower end of the.
Furthermore, a centralizer is fixedly mounted on the outer wall of the outer pipe and located between the seat ring and the water hole.
Furthermore, the shear pin is arranged along the radial direction of the shear pin inner sleeve and penetrates through the long sleeve, and two ends of the shear pin are fixedly connected with the shear pin inner sleeve.
Further, a first seal ring is arranged between the long-sleeve sealing sleeve and the long-sleeve contact.
Further, a second sealing ring is arranged between the long-sleeve sealing sleeve and the outer tube sealing seat.
Further, a third sealing ring is arranged at the contact position of the piston head and the core tube.
Further, the clamp spring is connected with the press-in pipe shoe through threads.
Further, the lower end of the first long sleeve is fixedly connected with the upper end of the second long sleeve through a fixing pin and a locking sleeve, the upper end of the second long sleeve extends into the locking sleeve, and the fixing pin penetrates through the locking sleeve, the first long sleeve and the second long sleeve, so that the first long sleeve and the second long sleeve are fixedly connected.
The invention also provides a use method of the split type mud static pressure coring tool, which comprises the following steps:
after the components are connected and installed, the whole split type mud static pressure coring tool is conveyed to the bottom of a hole through the fishing spearhead, the upper end of the outer pipe is sealed after the whole split type mud static pressure coring tool is conveyed to the bottom of the hole, so that a sealed space is formed inside the outer pipe,
before the coring operation is started, a mud pump is started and the discharge capacity of the mud pump is controlled, the mud pressure cuts the shearing pin and keeps keeping the current mud discharge capacity and the mud pressure, the shearing pin inner sleeve is disconnected with the fishing spearhead, so that the shearing pin inner sleeve and all parts which are connected with the shearing pin inner sleeve and are positioned below the shearing pin inner sleeve slide down along the first long sleeve and the second long sleeve until the shearing pin inner sleeve slides to the lowest part of the second long sleeve, and in the sliding process, the inner pipe with the core pipe is ejected out of the inner cavity of the outer pipe, so that the core pipe enters the stratum, and the coring is completed.
The invention has the beneficial effects that: the core taking device can greatly improve the core taking length in each time, thereby improving the core taking efficiency, saving the operation time, ensuring the original state of the core and avoiding the disturbance of the core taking tool to the core. The split type static pressure coring method for the slurry can greatly reduce energy consumption and improve the utilization rate of energy.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of the coring configuration of the present invention;
fig. 3 is a schematic view of the first and second long sleeves after detachment and separation.
In the figure, 1-fishing spearhead, 2-slurry channel, 3-seat ring, 4-shearing pin, 5-shearing pin inner sleeve, 6-baffle groove, 7-long sleeve gland, 8-first sealing ring, 9-second sealing ring, 10-outer tube sealing seat, 11-first long sleeve, 12-core tube, 13-inner tube, 14-outer tube, 15-fixing pin, 16-locking sleeve, 17-centralizer, 18-piston head, 19-third sealing ring, 20-water hole, 21-clamp spring, 22-press-in pipe shoe, 23-drill bit and 24-second long sleeve.
Detailed description of the preferred embodiments
The invention is further described with reference to the accompanying drawings and specific embodiments:
as shown in fig. 1-3, a split hydrostatic mud coring tool includes an outer tube 14 and an inner tube 13 assembly mounted within the outer tube 14.
The outer tube 14 is from last to installing seat ring 3, centralizer 17, water hole 20 and drill bit 23 down in proper order, and seat ring 3 fixed mounting is on the inner wall of outer tube 14 upper end, and centralizer 17 installs on the outer wall of outer tube 14 lower extreme, and water hole 20 is located the outer tube 14 lower extreme and communicates the inner chamber and the outside of outer tube 14, and drill bit 23 is located outer tube 14 bottommost and fixed mounting is on the outer wall of outer tube 14.
The inner pipe 13 assembly comprises a fishing spearhead 1, a shearing pin 4, a shearing pin inner sleeve 5, a long-sleeve sealing sleeve 7, an outer pipe sealing seat 10, a first long sleeve 11, a fixing pin 15, a locking sleeve 16, a second long sleeve 24, a core pipe 12, an inner pipe 13, a piston head 18, a clamp spring 21 and a press-in pipe shoe 22. Two sides of the fishing spearhead 1 are respectively provided with a slurry channel 2, and the slurry channels 2 are arranged in a penetrating way along the axial direction of the fishing spearhead 1 so as to communicate the inner cavity of an outer tube 14 at the upper end of the fishing spearhead 1 with the inner cavity of an outer tube 14 at the lower end of the fishing spearhead 1. The lower end of the fishing spearhead 1 is fixedly connected with the first long sleeve 11 and the shear pin inner sleeve 5 respectively, the fishing spearhead 1 is hung on the seat ring 3, so that the whole inner pipe 13 assembly is hung and installed in the inner cavity of the outer pipe 14, and the first long sleeve 11 penetrates through the shear pin inner sleeve 5. First long sleeve 11 is the tubulose, and first long sleeve 11 extends along the 14 axial directions of outer tube, and the lower extreme of first long sleeve 11 passes through the upper end fixed connection of fixed pin 15, lock sleeve 16 and second long sleeve 24, and the upper end of second long sleeve 24 stretches into to the lock sleeve 16 in, and fixed pin 15 runs through lock sleeve 16, first long sleeve 11 and second long sleeve 24 to make first long sleeve 11 and second long sleeve 24 fixed connection.
The shear pin inner sleeve 5 is connected with the first long sleeve 11 through the shear pin 4, the first long sleeve 11 penetrates through the shear pin inner sleeve 5, so that the shear pin inner sleeve 5 can be fixedly mounted on the first long sleeve 11, the shear pin 4 is arranged along the radial direction of the shear pin inner sleeve 5 and penetrates through the first long sleeve 11, and two ends of the shear pin 4 are fixedly connected with the shear pin inner sleeve 5. The lower end of the shear pin inner sleeve 5 is fixedly connected with the upper end of the long-sleeve sealing sleeve 7, and the lower end of the long-sleeve sealing sleeve 7 is fixedly connected with the upper end of the outer tube sealing seat 10. A first sealing ring 8 is arranged between the long-sleeve sealing sleeve 7 and the first long sleeve 11 in a contact mode, a second sealing ring 9 is arranged between the long-sleeve sealing sleeve 7 and the outer tube sealing seat 10, and the first sealing ring 8 and the second sealing ring 9 both play a sealing role. The lower end of the outer tube sealing seat 10 is respectively fixedly connected with a core tube 12 and an inner tube 13, the core tube 12 is positioned in the inner tube 13, and the first long sleeve 11 penetrates through the core tube 12. That is, the fixing pin 15 and the locking sleeve 16 are both located below the outer tube seal holder 10, that is, the joint between the first long sleeve 11 and the second long sleeve 24 is located below the outer tube seal holder 10. Likewise, the second long sleeve 24 also passes through the core barrel 12. The lower end of the second long sleeve 24 is fixedly connected with the piston head 18, the piston head 18 is positioned in the core barrel 12 and the inner tube 13, the piston head 18 is tightly attached to the inner wall of the core barrel 12, and a third sealing ring 19 is arranged at the contact position of the piston head 18 and the core barrel 12 to play a role in sealing. The lower end of the core tube 12 and the lower end of the inner tube 13 are both fixedly connected with a clamp spring 21, the clamp spring 21 is located below the piston head 18 and at the lower end of the outer tube 14 and is flush with the water hole 20, a press-in shoe 22 is fixedly installed at the lower end of the clamp spring 21, the clamp spring 21 is installed in the press-in shoe 22, and the clamp spring 21 and the press-in shoe 22 are connected through threads.
Wherein, the connection can adopt a threaded connection or other connection modes.
Before the drilling is started, the components are connected and installed, holes are cleared to the coring stratum through the drilling equipment, and hole channels communicated with the coring stratum are drilled out. Then, the coring winch arranged on the drilling ship is connected with the fishing spearhead 1, the whole split type mud static pressure coring tool is sent to the hole bottom, and the steel wire rope of the coring winch is kept loose after the whole split type mud static pressure coring tool is sent to the hole bottom, so that the split type mud static pressure coring tool is not bound by the coring winch any more. The upper end of the outer tube 14, that is, the upper end of the fishing spearhead 1 is sealed by a valve, so that a sealed space is formed inside the outer tube 14, thereby completing preparation before coring.
The mud pump can be operated with a large displacement mud pump by starting the mud pump and controlling the displacement of the mud pump before the coring operation is started. When the pressure generated by the discharged mud rises to a preset threshold (e.g. 5-8Mpa), the mud pressure shears the shear pins 4, continuing to maintain the current mud displacement and mud pressure. After the shear pin 4 is sheared, the shear pin inner sleeve 5 is disconnected from the fishing spearhead 1, so that the shear pin inner sleeve 5 and the parts connected with the shear pin inner sleeve 5 and positioned below the shear pin inner sleeve 5 slide down along the first long sleeve 11 and the second long sleeve 24 until the shear pin inner sleeve 5 slides down to the lowest part of the second long sleeve 24, and the shear pin inner sleeve 5 is positioned below the connection part between the first long sleeve 11 and the second long sleeve 24. During the slipping process, the inner tube 13 with the core barrel 12 is ejected from the inner cavity of the outer tube 14 at a high speed, i.e., the lower end of the inner tube 13 with the core barrel 12 protrudes from the inner cavity of the outer tube 14, thereby allowing the core barrel 12 to enter the formation and complete the coring. When the inner tube 13 has completed its full downward stroke, the mud pressure rises above the original mud pressure, the mud pump is closed and the valve is opened, thereby releasing the sealed space. The fishing spearhead 1 is extracted by a coring winch, the fishing spearhead 1 extracts the whole inner tube 13 assembly from the outer tube 14 through the first long sleeve 11 and the second long sleeve 24, and then the coring sample is taken out from the core barrel 12, and all coring work is finished.
After the first long sleeve 11 is extracted from the inner cavity of the outer tube 14 by the fishing spearhead 1, the second long sleeve 24 and the parts connected with the second long sleeve 24 are suspended in the outer tube 14 by the baffle being caught in the baffle slot. Then, the locking sleeve 16 and the fixing pin 15 are detached from the first and second long sleeves 11 and 24, so that the first long sleeve 11 is completely taken out and placed on the deck of the drill ship. The spearhead 1 is then connected to the second long sleeve 24 so that the second long sleeve 24 is likewise removed by the spearhead 1 and placed on the deck of the drilling vessel. The core barrel 12 is then removed from the second long sleeve 24 and the core sample is removed so that it can be prepared for the next core return.
Fig. 3 is a schematic view showing the first long sleeve 11 and the second long sleeve 24 detached and separated, and it can be seen from the figure that the first long sleeve 11 and the second long sleeve 24 can be rapidly detached and separated by the locking sleeve 16 and the fixing pin 15, that is, the split coring can be realized.
According to the core taking device, the split structure is realized through the first long sleeve 11 and the second long sleeve 24, so that the core tube 12 connected with the second long sleeve 24 can be ejected from the outer tube 14, the core taking length in each time can be greatly increased, the core taking efficiency is improved, the operation time is saved, the original shape of the core can be ensured, and the core is prevented from being disturbed by a core taking tool. The split type static pressure coring method for the slurry can greatly reduce energy consumption and improve the utilization rate of energy.
The embodiments disclosed in this description are only an exemplification of the single-sided characteristics of the invention, and the scope of protection of the invention is not limited to these embodiments, and any other functionally equivalent embodiments fall within the scope of protection of the invention. Various other changes and modifications to the above-described embodiments and concepts will become apparent to those skilled in the art from the above description, and all such changes and modifications are intended to be included within the scope of the present invention as defined in the appended claims.
Claims (9)
1. A split type static mud coring tool is characterized by comprising an outer pipe and an inner pipe assembly arranged in the outer pipe,
the outer tube is sequentially provided with a seat ring, a water hole and a drill bit from top to bottom, the seat ring is fixedly arranged on the inner wall of the upper end of the outer tube, the water hole is positioned at the lower end of the outer tube and communicates the inner cavity of the outer tube with the outside, the drill bit is positioned at the lowest end of the outer tube and is fixedly arranged on the outer wall of the outer tube,
the inner pipe assembly comprises a fishing spearhead, a shearing pin inner sleeve, a long sleeve sealing sleeve, an outer pipe sealing seat, a first long sleeve, a fixing pin, a locking sleeve, a second long sleeve, a core pipe, an inner pipe, a piston head, a clamp spring and a press-in pipe shoe,
two sides of the fishing spearhead are respectively provided with a slurry channel, the slurry channels are used for communicating an inner cavity of an outer tube at the upper end of the fishing spearhead with an inner cavity of an outer tube at the lower end of the fishing spearhead, the lower end of the fishing spearhead is respectively fixedly connected with a first long sleeve and a shearing pin inner sleeve, the fishing spearhead is hung on the seat ring, so that the whole inner tube assembly is hung and installed in the inner cavity of the outer tube, the first long sleeve penetrates through the shearing pin inner sleeve and extends along the axial direction of the outer tube, the lower end of the first long sleeve is fixedly connected with the upper end of a second long sleeve,
the shear pin inner sleeve is connected with the first long sleeve through a shear pin, the lower end of the shear pin inner sleeve is fixedly connected with the upper end of the long sleeve sealing sleeve, the lower end of the long sleeve sealing sleeve is fixedly connected with the upper end of the outer tube sealing seat, the lower end of the outer tube sealing seat is fixedly connected with the core tube and the inner tube respectively, the core tube is located in the inner tube, the lower end of the second long sleeve is fixedly connected with the piston head, the first long sleeve and the second long sleeve penetrate through the core tube, the piston head is located in the core tube and the inner tube, the piston head is tightly attached to the inner wall of the core tube, the lower end of the core tube and the lower end of the inner tube are fixedly connected with the clamp springs, the clamp springs are located below the piston head and at the lower end of the.
2. The split hydrostatic mud coring tool of claim 1, wherein a centralizer is further fixedly mounted on the outer wall of the outer tube, the centralizer being positioned between the seat ring and the port.
3. The split type hydrostatic mud coring tool of claim 1, wherein the shear pin is disposed along a radial direction of the inner shear pin sleeve and penetrates through the long sleeve, and both ends of the shear pin are fixedly connected to the inner shear pin sleeve.
4. The split hydrostatic mud coring tool of claim 1, wherein a first seal ring is disposed between the long sleeve gland and the long sleeve contact.
5. The split hydrostatic mud coring tool of claim 1, wherein a second seal ring is disposed between the long sleeve gland and the outer tube seal mount.
6. The split hydrostatic mud coring tool of claim 1, wherein a third seal is provided where the piston head contacts the core barrel.
7. The split hydrostatic mud coring tool of claim 1, wherein the clamp spring is threadably connected to the press-in shoe.
8. The split type hydrostatic mud coring tool of claim 1, wherein the lower end of the first long sleeve is fixedly connected to the upper end of the second long sleeve by a fixing pin and a locking sleeve, the upper end of the second long sleeve extends into the locking sleeve, and the fixing pin penetrates through the locking sleeve, the first long sleeve and the second long sleeve, thereby fixedly connecting the first long sleeve and the second long sleeve.
9. A method of using the split hydrostatic mud coring tool of claim 1, comprising the steps of:
after the components are connected and installed, the whole split type mud static pressure coring tool is conveyed to the bottom of a hole through the fishing spearhead, the upper end of the outer pipe is sealed after the whole split type mud static pressure coring tool is conveyed to the bottom of the hole, so that a sealed space is formed inside the outer pipe,
before the coring operation is started, a mud pump is started and the discharge capacity of the mud pump is controlled, the mud pressure cuts the shearing pin and keeps keeping the current mud discharge capacity and the mud pressure, the shearing pin inner sleeve is disconnected with the fishing spearhead, so that the shearing pin inner sleeve and all parts which are connected with the shearing pin inner sleeve and are positioned below the shearing pin inner sleeve slide down along the first long sleeve and the second long sleeve until the shearing pin inner sleeve slides to the lowest part of the second long sleeve, and in the sliding process, the inner pipe with the core pipe is ejected out of the inner cavity of the outer pipe, so that the core pipe enters the stratum, and the coring is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110266593.6A CN112901100A (en) | 2021-03-11 | 2021-03-11 | Split type static-pressure slurry coring tool and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110266593.6A CN112901100A (en) | 2021-03-11 | 2021-03-11 | Split type static-pressure slurry coring tool and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112901100A true CN112901100A (en) | 2021-06-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110266593.6A Pending CN112901100A (en) | 2021-03-11 | 2021-03-11 | Split type static-pressure slurry coring tool and method |
Country Status (1)
| Country | Link |
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| CN (1) | CN112901100A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2085365A7 (en) * | 1970-04-14 | 1971-12-24 | Cocean | Core sampler - particularly for under water drilling |
| US20100084193A1 (en) * | 2007-01-24 | 2010-04-08 | J.I. Livingstone Enterprises Ltd. | Air hammer coring apparatus and method |
| CN101886528A (en) * | 2010-08-03 | 2010-11-17 | 煤炭科学研究总院西安研究院 | Cord core drilling tool for tunnel subhorizontal hole |
| CN102296950A (en) * | 2011-05-16 | 2011-12-28 | 中海油田服务股份有限公司 | Hydraulic shearing type sampling drilling tool |
| CN108756796A (en) * | 2018-05-30 | 2018-11-06 | 广州海洋地质调查局 | Drilling at the sea coring drilling with keep up pressure method |
| CN208885222U (en) * | 2018-10-22 | 2019-05-21 | 吉林大学 | A kind of ocean hole bottom freezing cord coring drill |
| CN214464017U (en) * | 2021-03-11 | 2021-10-22 | 广州海洋地质调查局 | Split type static-pressure slurry coring tool |
-
2021
- 2021-03-11 CN CN202110266593.6A patent/CN112901100A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2085365A7 (en) * | 1970-04-14 | 1971-12-24 | Cocean | Core sampler - particularly for under water drilling |
| US20100084193A1 (en) * | 2007-01-24 | 2010-04-08 | J.I. Livingstone Enterprises Ltd. | Air hammer coring apparatus and method |
| CN101886528A (en) * | 2010-08-03 | 2010-11-17 | 煤炭科学研究总院西安研究院 | Cord core drilling tool for tunnel subhorizontal hole |
| CN102296950A (en) * | 2011-05-16 | 2011-12-28 | 中海油田服务股份有限公司 | Hydraulic shearing type sampling drilling tool |
| CN108756796A (en) * | 2018-05-30 | 2018-11-06 | 广州海洋地质调查局 | Drilling at the sea coring drilling with keep up pressure method |
| CN208885222U (en) * | 2018-10-22 | 2019-05-21 | 吉林大学 | A kind of ocean hole bottom freezing cord coring drill |
| CN214464017U (en) * | 2021-03-11 | 2021-10-22 | 广州海洋地质调查局 | Split type static-pressure slurry coring tool |
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