CN214464017U - Split type static-pressure slurry coring tool - Google Patents
Split type static-pressure slurry coring tool Download PDFInfo
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- CN214464017U CN214464017U CN202120517483.8U CN202120517483U CN214464017U CN 214464017 U CN214464017 U CN 214464017U CN 202120517483 U CN202120517483 U CN 202120517483U CN 214464017 U CN214464017 U CN 214464017U
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Abstract
The utility model discloses a split type mud static pressure 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 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, shear pin endotheca, long sleeve seal cover, outer tube seal receptacle, first long sleeve, fixed pin, lock sleeve, second long sleeve, core pipe, inner tube, piston head, jump ring and the pipe shoes of impressing, salvages spearhead's lower extreme respectively with first long sleeve, shear pin endotheca fixed connection, salvages spearhead and hangs on the seat ring to make whole inner tube assembly hang and install in the inner chamber of outer tube. The utility model discloses can enough improve every time greatly and get core length to improve and get core efficiency, save the activity duration, can also guarantee the original state nature of rock core, avoided the disturbance of coring tool to the rock core.
Description
Technical Field
The utility model relates to an ocean sampling device technical field specifically is a split type mud static pressure 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, 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.
SUMMERY OF THE UTILITY MODEL
The not enough to prior art, the utility model aims at providing a split type mud static pressure coring tool, it can solve and avoid causing the disturbance and can improve the problem of coring length to the sample.
Realize the technical scheme of the purpose of the utility model is that: 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 outer tube, and the lower ends of the clamp springs are 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.
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 utility model has the advantages that: the utility model discloses can enough improve every time greatly and get core length to improve and get core efficiency, save the activity duration, can also guarantee the original state nature of rock core, avoided the disturbance of coring tool to the rock 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 structural view of the coring device after the coring operation;
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
The invention will be 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.
The utility model discloses owing to realize split type structure through first long sleeve 11 and second long sleeve 24, and then make the core barrel 12 of being connected with second long sleeve 24 can follow 14 interior ejections of outer tube, and then can enough improve greatly and get core length at every turn to improve and get core efficiency, save operating time, can also guarantee the original state nature of rock core, avoided the disturbance of coring tool to the rock core. The split type static pressure coring method for the slurry can greatly reduce energy consumption and improve the utilization rate of energy.
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 (8)
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 outer tube, and the lower ends of the clamp springs are fixedly installed in the press-in pipe shoe.
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120517483.8U CN214464017U (en) | 2021-03-11 | 2021-03-11 | Split type static-pressure slurry coring tool |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120517483.8U CN214464017U (en) | 2021-03-11 | 2021-03-11 | Split type static-pressure slurry coring tool |
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| Publication Number | Publication Date |
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| CN214464017U true CN214464017U (en) | 2021-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120517483.8U Active CN214464017U (en) | 2021-03-11 | 2021-03-11 | Split type static-pressure slurry coring tool |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112901100A (en) * | 2021-03-11 | 2021-06-04 | 广州海洋地质调查局 | Split type static-pressure slurry coring tool and method |
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2021
- 2021-03-11 CN CN202120517483.8U patent/CN214464017U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112901100A (en) * | 2021-03-11 | 2021-06-04 | 广州海洋地质调查局 | Split type static-pressure slurry coring tool and method |
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