CN214464018U - Static pressure constant speed coring tool - Google Patents
Static pressure constant speed coring tool Download PDFInfo
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- CN214464018U CN214464018U CN202120517543.6U CN202120517543U CN214464018U CN 214464018 U CN214464018 U CN 214464018U CN 202120517543 U CN202120517543 U CN 202120517543U CN 214464018 U CN214464018 U CN 214464018U
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- outer tube
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- core
- static pressure
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- 230000003068 static effect Effects 0.000 title claims abstract description 17
- 241001449342 Chlorocrambe hastata Species 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims description 38
- 238000010008 shearing Methods 0.000 claims description 6
- 210000004907 gland Anatomy 0.000 claims 2
- 239000011435 rock Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract 1
- 238000005553 drilling Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Abstract
The utility model discloses a static pressure constant speed coring tool, including outer tube and the inner tube assembly of installation in the outer tube, the outer tube is from last to installing seat ring, water hole and drill bit down in proper order, seat ring fixed mounting is on the inner wall of outer tube upper end, the water hole is located the outer tube lower extreme and communicates the inner chamber and the outside of outer tube, the drill bit is located the outer tube and on the outer wall of outer tube lower extreme and fixed mounting, the inner tube assembly is including salvaging spearhead, constant speed valve, shear pin endotheca, long sleeve seal cover, outer tube seal seat, long sleeve, core barrel, inner tube, piston head, jump ring and the tubael shoe of impressing, salvages spearhead lower extreme and constant speed valve fixed connection, the constant speed valve hangs on the seat ring to make whole inner tube assembly hang and install in the outer tube. The utility model discloses can guarantee to get the original state nature of core sample (being the rock core), avoid the disturbance to the rock core, can reduce the consumption of energy again by a wide margin, improve the utilization ratio of energy, it is efficient to get the core mode, saves the activity duration.
Description
Technical Field
The utility model relates to an ocean sampling device technical field specifically is a static pressure constant speed coring tool.
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 and influences the coring quality. In the existing coring device, the phenomenon of disturbing a sample is ubiquitous, and improvement is needed urgently.
SUMMERY OF THE UTILITY MODEL
To the deficiencies of the prior art, the object of the present invention is to provide a static pressure constant speed coring tool which can solve the problem of consuming less energy and avoiding disturbing the sample.
Realize the technical scheme of the purpose of the utility model is that: a static pressure constant speed coring tool comprises an outer tube and an inner tube assembly arranged in the outer tube,
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 constant-speed valve, a shearing pin inner sleeve, a long-sleeve sealing sleeve, an outer pipe sealing seat, a long sleeve, a core barrel, an inner pipe, a piston head, a clamp spring and a press-in pipe shoe, wherein the lower end of the fishing spearhead is fixedly connected with the constant-speed valve, the constant-speed valve is hung on the seat ring so that the whole inner pipe assembly is hung and installed in the outer pipe, the lower end of the constant-speed valve is fixedly connected with the upper end of the long sleeve, the lower end of the long sleeve is fixedly connected with the piston head,
the shear pin inner sleeve is connected with the long sleeve through the 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 long sleeve penetrates through the core tube, the lower end of the core tube and the lower end of the inner tube are fixedly connected with the clamp spring, 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 clamp spring is located below the piston head and located at the lower end of the outer tube, and the lower end of the clamp spring is fixedly installed in the press-in pipe shoe.
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.
The utility model has the advantages that: the utility model discloses can guarantee to get the original state nature of core sample (being the rock core), avoid the disturbance to the rock core, can reduce the consumption of energy again by a wide margin, improve the utilization ratio of energy, it is efficient to get the core mode, saves the activity duration.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is the structure schematic diagram of the utility model after the coring is completed.
In the figure, 1-fishing spearhead, 2-constant speed valve, 3-seat ring, 4-shearing pin, 5-shearing pin inner sleeve, 6-long sleeve sealing sleeve, 7-first sealing ring, 8-second sealing ring, 9-outer tube sealing seat, 10-long sleeve, 11-core tube, 12-inner tube, 13-outer tube, 14-centralizer, 15-piston head, 16-third sealing ring, 17-water hole, 18-clamp spring, 19-press-in pipe shoe and 20-drill bit.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific embodiments:
1-2, a static pressure constant velocity coring tool includes an outer tube 13 and an inner tube assembly mounted within the outer tube 13.
Outer tube 13 is from last to installing seat ring 3, centralizer 14, water hole 17 and drill bit 20 down in proper order, and seat ring 3 fixed mounting is on the inner wall of outer tube 13 upper end, and centralizer 14 is installed on the outer wall of outer tube 13 lower extreme, and water hole 17 is located the outer tube 13 lower extreme and communicates the inner chamber and the outside of outer tube 13, and drill bit 20 is located outer tube 13 bottom and fixed mounting on the outer wall of outer tube 13.
The inner pipe assembly comprises a fishing spearhead 1, a constant-speed valve 2, a shearing pin 4, a shearing pin inner sleeve 5, a long-sleeve sealing sleeve 6, an outer pipe sealing seat 9, a long sleeve 10, a core barrel 11, an inner pipe 12, a piston head 15, a clamp spring 18 and a press-in pipe shoe 19, wherein the lower end of the fishing spearhead 1 is fixedly connected with the constant-speed valve 2, the constant-speed valve 2 is hung on the seat ring 3, so that the whole inner pipe assembly is hung and installed in the outer pipe 13, the lower end of the constant-speed valve 2 is fixedly connected with the upper end of the long sleeve 10, the long sleeve 10 is tubular, the long sleeve 10 extends in the axial direction of the outer pipe 13, and the lower end of the long sleeve 10 is fixedly connected with the piston head 15. The shear pin inner sleeve 5 is connected with the long sleeve 10 through the shear pin 4, the long sleeve 10 penetrates through the shear pin inner sleeve 5, therefore, the shear pin inner sleeve 5 can be fixedly installed on the long sleeve 10, the shear pin 4 is arranged along the radial direction of the shear pin inner sleeve 5 and penetrates through the long sleeve 10, 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 6, and the lower end of the long-sleeve sealing sleeve 6 is fixedly connected with the upper end of the outer tube sealing seat 9. A first sealing ring 7 is arranged between the long-sleeve sealing sleeve 6 and the long sleeve 10 in a contact mode, a second sealing ring 8 is arranged between the long-sleeve sealing sleeve 6 and the outer tube sealing seat 9, and the first sealing ring 7 and the second sealing ring 8 both play a sealing role. The lower end of the outer tube sealing seat 9 is respectively fixedly connected with a core tube 11 and an inner tube 12, the core tube 11 is positioned in the inner tube 12, and the long sleeves 10 penetrate through the core tube 11. The lower extreme of core barrel 11 and the lower extreme of inner tube 12 all with jump ring 18 fixed connection, piston head 15 is located core barrel 11 and inner tube 12, piston head 15 hugs closely in the inner wall of core barrel 11, be provided with third sealing washer 16 in piston head 15 and core barrel 11 contact department, play sealed effect, jump ring 18 is located piston head 15 below and is located outer tube 13 lower extreme department, and level with water hole 17, the lower extreme fixed mounting of jump ring 18 has the pipe shoe 19 of impressing, and jump ring 18 installs in the pipe shoe 19 of impressing, jump ring 18 passes through threaded connection with the pipe shoe 19 of impressing.
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 whole static pressure constant speed coring tool is sent to the bottom of the hole by connecting the coring winch arranged on the drilling ship with the fishing spearhead 1, and the steel wire rope of the coring winch is kept loose after the static pressure constant speed coring tool is sent to the bottom of the hole, so that the static pressure constant speed coring tool is not bound by the coring winch any more. The upper end of the outer tube 13, 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 13, thereby completing preparation before coring.
Before the coring operation is started, the mud pump is started and the discharge capacity of the mud pump is controlled, the mud pump can adopt a low-discharge mud pump, and the discharge capacity of the mud pump can be controlled to be about 10-17L/min (liter/min). Wherein the displacement is adjusted according to the inner diameter of the outer tube 13, typically the inner diameter of the outer tube 13 is 121mm (millimeters). When the pressure generated by the discharged mud rises to a preset threshold value (for example, 3Mpa), the constant speed valve 2 is opened, the mud pressure shears the shear pin 4, and the current mud displacement and mud pressure are continuously maintained. After the shear pin 4 is sheared, the shear pin inner 5 is disconnected from the constant speed valve 2, so that the shear pin inner 5 and each part connected to the shear pin inner 5 and located below the shear pin inner 5 slide down along the long sleeve 10 until the shear pin inner 5 slides down to the lowest part of the long sleeve 10. During the slipping process, the inner tube 12 with the core tube 11 is advanced forward (i.e., toward the coring formation) at a constant velocity, thereby allowing the core tube 11 to enter the formation and complete the coring. After the inner pipe 12 finishes the whole downward stroke, the mud pressure rises and exceeds the original mud pressure, the mud pump is closed, the valve is opened, the sealing space is released, the fishing spearhead 1 is extracted by the coring winch, the whole inner pipe 12 is always extracted from the outer pipe 13 by the fishing spearhead 1 through the constant speed valve 2 and the long sleeve 10, then the coring sample is taken out from the core pipe 11, and all coring work is finished.
The utility model discloses can guarantee to get the original state nature of core sample (being the rock core), avoid the disturbance to the rock core, can reduce the consumption of energy again by a wide margin, improve the utilization ratio of energy, it is efficient to get the core mode, saves the activity duration.
The embodiment disclosed in this specification is only an example of the single-sided features of the present invention, and the protection scope of the present invention is not limited to this embodiment, and any other embodiments having equivalent functions all fall into the protection scope of the present invention. Various other changes and modifications may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such changes and modifications should fall within the scope of the present invention.
Claims (7)
1. A static pressure constant speed coring tool is characterized by comprising an outer tube and an inner tube assembly arranged in the outer tube,
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 constant-speed valve, a shearing pin inner sleeve, a long-sleeve sealing sleeve, an outer pipe sealing seat, a long sleeve, a core barrel, an inner pipe, a piston head, a clamp spring and a press-in pipe shoe, wherein the lower end of the fishing spearhead is fixedly connected with the constant-speed valve, the constant-speed valve is hung on the seat ring so that the whole inner pipe assembly is hung and installed in the outer pipe, the lower end of the constant-speed valve is fixedly connected with the upper end of the long sleeve, the lower end of the long sleeve is fixedly connected with the piston head,
the shear pin inner sleeve is connected with the long sleeve through the 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 long sleeve penetrates through the core tube, the lower end of the core tube and the lower end of the inner tube are fixedly connected with the clamp spring, 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 clamp spring is located below the piston head and located at the lower end of the outer tube, and the lower end of the clamp spring is fixedly installed in the press-in pipe shoe.
2. The static pressure constant velocity 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 static pressure constant speed coring tool of claim 1, wherein the shear pin is disposed radially of the shear pin inner sleeve and passes through the long sleeve, and both ends of the shear pin are fixedly connected to the shear pin inner sleeve.
4. The static pressure constant speed coring tool of claim 1, wherein a first seal ring is disposed between the long sleeve gland and the long sleeve contact.
5. The static pressure constant speed 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 static pressure constant velocity coring tool of claim 1, wherein a third seal is provided where the piston head contacts the core barrel.
7. The static pressure constant velocity coring tool of claim 1, wherein the snap spring is threadably connected to a press-in shoe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120517543.6U CN214464018U (en) | 2021-03-11 | 2021-03-11 | Static pressure constant speed coring tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120517543.6U CN214464018U (en) | 2021-03-11 | 2021-03-11 | Static pressure constant speed coring tool |
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| Publication Number | Publication Date |
|---|---|
| CN214464018U true CN214464018U (en) | 2021-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120517543.6U Withdrawn - After Issue CN214464018U (en) | 2021-03-11 | 2021-03-11 | Static pressure constant speed coring tool |
Country Status (1)
| Country | Link |
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| CN (1) | CN214464018U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112901099A (en) * | 2021-03-11 | 2021-06-04 | 广州海洋地质调查局 | Static pressure constant-speed coring tool and method |
-
2021
- 2021-03-11 CN CN202120517543.6U patent/CN214464018U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112901099A (en) * | 2021-03-11 | 2021-06-04 | 广州海洋地质调查局 | Static pressure constant-speed coring tool and method |
| CN112901099B (en) * | 2021-03-11 | 2024-03-22 | 广州海洋地质调查局 | Static pressure constant speed coring tool and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20211022 Effective date of abandoning: 20240322 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20211022 Effective date of abandoning: 20240322 |