CN212583666U - Copper shear pin mounting structure of graded cementing device - Google Patents
Copper shear pin mounting structure of graded cementing device Download PDFInfo
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- CN212583666U CN212583666U CN202021420812.9U CN202021420812U CN212583666U CN 212583666 U CN212583666 U CN 212583666U CN 202021420812 U CN202021420812 U CN 202021420812U CN 212583666 U CN212583666 U CN 212583666U
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Abstract
The utility model relates to a well cementation operation technical field discloses a hierarchical cementing ware copper shear pin mounting structure, and it is including offering the mounting hole on hierarchical cementing ware body lateral wall and offering the pinhole on opening the sleeve or closing sleeve or slippage sleeve lateral wall, install in the mounting hole one end run through hierarchical cementing ware body and with the complex shear pin is pegged graft to the pinhole, screw-thread fit has the protection stopper that is used for the shutoff shear pin on the mounting hole. This application utilizes the protection stopper with shear pin and stage cementing ware body outside isolated to with the shear pin fastening in the mounting hole, take place not hard up with the on-the-spot income well in-process at stage cementing ware transportation with this to avoid the shear pin, improved the reliability of shear pin.
Description
Technical Field
The application relates to the technical field of well cementation operation, in particular to a copper shear pin mounting structure of a staged cementing device.
Background
After the oil and gas well is drilled, a casing needs to be put in for well cementation operation. Well cementation is an important operation in the drilling process, and the operation process is as follows: a casing string with a certain size is put into the well, cement paste is injected around the casing string, and then the casing is fixed on the well wall, so that the casing is prevented from being corroded; with the increasing of the well depth, the requirement of the well cementation process can be ensured only by adopting two-stage or even multi-stage well cementation because the requirement of the well cementation of the deep well cannot be met by one-step well cementation; the stage cementing device is a key tool for implementing stage cementing. The existing stage cementing device is mainly divided into a mechanical type, a hydraulic type and a drilling-free type according to the structure. The mechanical stage cementing device is matched with an opening plug for use, the working principle is that the opening plug is put in a wellhead, when the opening plug reaches the stage cementing device, a seal is formed with the inside of the stage cementing device, the pressure build-up shearing opening shear pin is realized, the opening plug is made to move, and accordingly a circulation hole is opened; and after the second-stage well cementation, putting a closing plug through the wellhead to act on the inner sleeve of the stage cementing device, realizing pressure building shearing and closing of the shear pin again, continuously moving the inner sleeve, and closing the circulation hole. Before the hydraulic stage cementing device opens the circulation hole, the inside of the pipe string is required to be sealed, the working principle is that the inside of the pipe string is sealed and suppressed, the upper surface and the lower surface of an opening plug are provided with annular area differences, when the pressure reaches a certain value, an acting force generated by the area differences cuts off an opening shear pin, the opening plug moves, the circulation hole is opened, and the closing action is the same as that of a mechanical type; the drilling-free stage cementing device is characterized in that a layer of slippage sleeve is additionally arranged in an inner sleeve of the stage cementing device on the basis of a mechanical type, so that the slippage sleeve slips from the inside of the stage cementing device after a circulation hole is closed, and then falls into a shaft bottom by means of gravity to penetrate through the stage cementing device.
The stage cementing device needs a plurality of shear pins to realize the pressure-building movement of the opening plug, the closing plug and the slipping sleeve. However, the existing shear pins are installed in a threaded and external mode, and are easy to loosen in the processes of transportation of the stage cementing device and field well entry, so that an opening plug can be opened or cannot be opened in advance, a slipping sleeve can be closed or cannot be closed in advance, and finally well cementation failure is caused.
The inventors consider that there is a drawback to the related art among the above. Therefore, the need for a hierarchical cementer copper shear pin mounting structure has the effect of avoiding shear pins to become flexible in the transportation and field well entry process of hierarchical cementer, and improves the reliability of shear pins.
SUMMERY OF THE UTILITY MODEL
To the not enough of prior art existence, this application provides a hierarchical cementer copper shear pin mounting structure.
The application provides a pair of hierarchical cementing ware copper shear pin mounting structure adopts following technical scheme:
the utility model provides a hierarchical cementing ware copper shear pin mounting structure, includes seting up the mounting hole on hierarchical cementing ware body lateral wall and seting up the pinhole on opening the sleeve or closing sleeve or slippage sleeve lateral wall, install in the mounting hole one end run through hierarchical cementing ware body and with the complex shear pin is pegged graft to the pinhole, screw-thread fit has the protection stopper that is used for the shutoff shear pin on the mounting hole.
Through adopting above-mentioned technical scheme, utilize the protection stopper with shear pin and stage cementing ware body outside isolated to with the shear pin fastening in the mounting hole, with this avoid the shear pin to take place to become flexible at stage cementing ware transportation and on-the-spot well entry in-process, improved the reliability of shear pin.
Preferably, the shear pin comprises a shear section and a fixed cylinder, one end of the shear section is in plug-in fit with the pin hole, the fixed cylinder is located in the mounting hole, the other end of the shear section is in plug-in fit with the fixed cylinder, and an expansion sheet made of an expandable material is filled between the protection plug and the fixed cylinder.
Through adopting above-mentioned technical scheme, will expand the piece setting between protection stopper and solid fixed cylinder, utilize the characteristic that the piece can expand to extrude solid fixed cylinder to stage cementing ware body is inside to this compactness between shear pin and the pinhole is further improved, avoids the shear pin to take place to become flexible at stage cementing ware transportation and on-the-spot well entry in-process.
Preferably, the middle part of the shearing section is provided with a groove, and a plurality of gaskets detachably connected with the fixed cylinder are stacked between the end part of the fixed cylinder and the end part of the shearing section.
Through adopting above-mentioned technical scheme, the setting up of groove makes the fracture position of shear pin obtain injecing to utilize the quantity control of gasket to cut the position of section and groove, with this hierarchical cementing ware that is applicable to different dimensions.
Preferably, the edge of the end part of the shearing section, which is in plug fit with the pin hole, is a conical surface so as to facilitate plug.
Preferably, a rubber block abutting against the inner end of the pin hole is fixed at one end part of the shearing section, which is in inserted connection with the pin hole.
Through adopting above-mentioned technical scheme, the block rubber is used for avoiding the shear pin to collide and wear in the process of inserting the pinhole to this eliminates the influence of shearing section tip wearing and tearing to the shear pin.
Preferably, the mounting hole is internally communicated with a fixing hole for accommodating a fixing cylinder, and a buffer ring is arranged between the fixing cylinder and the inner end of the fixing hole.
Through adopting above-mentioned technical scheme, utilize the buffer ring to avoid the wearing and tearing of solid fixed cylinder when installing into the fixed orifices to this influence of eliminating solid fixed cylinder wearing and tearing to the shear pin.
Preferably, one end of the protective plug, which is back to the shearing section, is provided with a cross groove or a straight groove.
By adopting the technical scheme, the protective plug is convenient for operators to disassemble and assemble by utilizing the cross groove or the straight groove.
In summary, the present application includes at least one of the following beneficial technical effects:
1. according to the scheme, the shear pin is isolated from the outside of the staged cementing device body by the protective plug and is fastened in the mounting hole, so that the shear pin is prevented from being loosened in the processes of transportation and field well entry of the staged cementing device, and the reliability of the shear pin is improved;
2. according to the scheme, the fixed cylinder is extruded towards the inside of the staged cementing device body by utilizing the characteristic that the expansion sheet can expand, so that the tightness between the shear pin and the pin hole is further improved, and the shear pin is prevented from being loosened in the processes of transportation and field well entry of the staged cementing device;
3. the quantity control of this scheme utilization gasket cuts the position of section and groove to this is applicable to the stage cementing ware of different dimensions.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present application.
Fig. 2 is an enlarged schematic view of the structure at a in fig. 1.
Description of reference numerals: 1. a stepped cementing device body; 11. a circulation hole; 12. opening the sleeve; 13. closing the sleeve; 14. slipping the sleeve; 2. mounting holes; 21. a fixing hole; 3. a protective plug; 4. shearing the nails; 41. cutting into sections; 42. a fixed cylinder; 43. a gasket; 44. a rubber block; 45. an intumescent sheet; 5. a buffer ring; 6. a pin hole.
Detailed Description
The present application is described in further detail below with reference to the attached drawings.
The embodiment of the application discloses hierarchical cementer copper shear pin mounting structure. As shown in fig. 1, the mounting structure of the stepped cementing device copper shear pin 4 is provided with a mounting hole 2 formed on the side wall of the stepped cementing device body 1 and a pin hole 6 formed on the outer side wall of the opening sleeve 12, the closing sleeve 13 or the slipping sleeve 14, wherein the pin holes 6 correspond to the mounting holes 2 one to one. The shear pin 4 is installed in the installation hole 2, and as shown in fig. 2, the shear pin 4 comprises a shear section 41, a fixed cylinder 42, a gasket 43, a rubber block 44 and an expansion sheet 45. The shearing section 41 is cylindrical and made of metal, and copper is selected as the material of the shearing section 41 in the embodiment, has good corrosion resistance and long service life. A groove convenient for shearing is arranged in the middle of the shearing section 41, and the edge of the end part of one end of the shearing section 41 is a conical surface and is in splicing fit with the pin hole 6; the rubber block 44 is made of rubber and has elasticity, and the rubber block 44 is fixed at one end of the shearing section 41 extending into the pin hole 6 and is used for preventing the shear pin 4 from being collided and worn in the process of being inserted into the pin hole 6; the fixed cylinder 42 is cylindrical, one end of the fixed cylinder, which is provided with an opening, faces the pin hole 6, and the other end of the shearing section 41 is in inserted fit with the fixed cylinder 42. The gasket 43 is circular and is positioned between the end parts of the fixed cylinder 42 and the shearing section 41, the number of the gaskets 43 is multiple, and a user can change the positions of the shearing section 41 and the groove by adjusting the number of the gaskets 43, so that the sealing device is suitable for graded cementing devices with different sizes and specifications. The fixing hole 21 for accommodating the fixing cylinder 42 is communicated with the mounting hole 2, and one end part of the fixing cylinder 42 provided with an opening is tightly abutted with the inner end of the fixing hole 21. The protective plug 3 is installed in the mounting hole 2 in a threaded manner, and the shear pin 4 is isolated from the outside of the stage cementing device body 1; the expansion sheet 45 is located between the protective plug 3 and the fixed cylinder 42 and is made of an expandable material, and in the embodiment, a material which expands when heated is selected. One end of the protective plug 3, which is back to the shearing section 41, is provided with a cross groove or a straight groove. After installing protective plug 3, only need utilize hot water hot compress can make inflation piece 45 inflation to this will fix a section of thick bamboo 42 to the inside extrusion of stage cementing ware body 1, thereby improve the compactness between shear pin 4 and the pinhole 6, avoid shear pin 4 to take place to become flexible at stage cementing ware transportation and on-the-spot well entry in-process.
The implementation principle of the copper shear pin mounting structure of the staged cementing device in the embodiment of the application is as follows: when the device is used, an operator only needs to insert one end of the shearing section 41 with the rubber block 44 into the pin hole 6, then put a proper number of gaskets 43 into the fixed cylinder 42 according to the requirement of shearing strength, then clamp the fixed cylinder 42 into the fixed hole 21, enable the shearing section 41 to be inserted into the fixed cylinder 42, then lay the expansion sheet 45 on one side of the fixed cylinder 42 opposite to the shearing section 41, and then screw the protective plug 3 into the mounting hole 2 to ensure screwing; utilize hot water hot compress mounting hole 2 position at last, impel the inflation piece 45 inflation to this will fix a section of thick bamboo 42 to the inside extrusion of stage cementing ware body 1, thereby improve the compactness between shear pin 4 and the pinhole 6, avoid shear pin 4 to take place to become flexible at stage cementing ware transportation and on-the-spot well entry in-process, thereby improve shear pin 4's reliability.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (7)
1. The utility model provides a hierarchical cementer copper shear pin mounting structure, includes seting up mounting hole (2) on hierarchical cementer body (1) lateral wall and seting up pinhole (6) on opening sleeve (12) or closing sleeve (13) or slippage sleeve (14) lateral wall, install in mounting hole (2) one end run through hierarchical cementer body (1) and with pinhole (6) grafting complex shear pin (4), its characterized in that: and a protective plug (3) for plugging the shear pin (4) is in threaded fit with the mounting hole (2).
2. The staged cementer copper shear pin mounting structure according to claim 1, wherein: the shear pin (4) comprises a shear section (41) with one end matched with the pin hole (6) in an inserting mode and a fixed cylinder (42) located in the mounting hole (2), the other end of the shear section (41) is matched with the fixed cylinder (42) in an inserting mode, and an expansion sheet (45) made of an expandable material is filled between the protection plug (3) and the fixed cylinder (42).
3. The staged cementer copper shear pin mounting structure according to claim 2, wherein: the middle part of the shearing section (41) is provided with a groove, and a plurality of gaskets (43) detachably connected with the fixed cylinder (42) are stacked between the end parts of the fixed cylinder (42) and the shearing section (41).
4. The staged cementer copper shear pin mounting structure according to claim 2, wherein: the edge of the end part of one end of the shearing section (41) which is in splicing fit with the pin hole (6) is a conical surface so as to facilitate splicing.
5. The staged cementer copper shear pin mounting structure according to claim 2, wherein: and a rubber block (44) which is abutted against the inner end of the pin hole (6) is fixed at one end part of the shearing section (41) which is in splicing fit with the pin hole (6).
6. The staged cementer copper shear pin mounting structure according to claim 2, wherein: the mounting hole (2) is internally communicated with a fixing hole (21) used for accommodating a fixing cylinder (42), and a buffer ring (5) is arranged between the fixing cylinder (42) and the inner end of the fixing hole (21).
7. The staged cementer copper shear pin mounting structure according to claim 1, wherein: one end of the protective plug (3) back to the shearing section (41) is provided with a cross groove or a straight groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021420812.9U CN212583666U (en) | 2020-07-17 | 2020-07-17 | Copper shear pin mounting structure of graded cementing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021420812.9U CN212583666U (en) | 2020-07-17 | 2020-07-17 | Copper shear pin mounting structure of graded cementing device |
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| Publication Number | Publication Date |
|---|---|
| CN212583666U true CN212583666U (en) | 2021-02-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021420812.9U Active CN212583666U (en) | 2020-07-17 | 2020-07-17 | Copper shear pin mounting structure of graded cementing device |
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| CN (1) | CN212583666U (en) |
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- 2020-07-17 CN CN202021420812.9U patent/CN212583666U/en active Active
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