CN212671599U - Oil production pipe connecting tool - Google Patents
Oil production pipe connecting tool Download PDFInfo
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- CN212671599U CN212671599U CN202021524594.3U CN202021524594U CN212671599U CN 212671599 U CN212671599 U CN 212671599U CN 202021524594 U CN202021524594 U CN 202021524594U CN 212671599 U CN212671599 U CN 212671599U
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Abstract
The utility model provides an oil production pipe connecting tool. Relates to the field of oil field downhole tools. The lower part of body is equipped with the guide shoe, and guide shoe upper portion is equipped with round and grinds the mill tooth, and it has one section recess to open on the centre bore on mill tooth upper portion, upwards interval in the recess is equipped with two packing elements, two baffles and slips in proper order, and the circular cone anchor ring on slips upper portion meets with the circular cone anchor ring of piston, and the piston is the loop configuration, opens one section piston hole in to the body wall thickness along the recess top, and the piston passes through sealing washer clearance fit with the piston hole and is connected. In the technical scheme, the fractured end part of the casing is not processed, the oil production string connecting tool is fixedly connected to the fractured tubular column in the well in a sealing mode, and then a new casing is connected through an upper connector at the upper part of the oil production string connecting tool, so that the whole maintenance operation is completed, the processes of connection, sealing, fixing, connection and the like can be completed through one-time tool operation, meanwhile, the fractured casing at the bottom of the well is utilized, the maintenance cost is reduced, and the operation efficiency is improved.
Description
The technical field is as follows:
the utility model belongs to the technical field of the oil field instrument technique in the pit and specifically relates to an oil production pipe connection tool.
Background art:
if the pipe column is broken during the production of the oil and gas well, the breakage of the pipe column can cause the production reduction or the scrapping of the whole oil and gas well, so that the timely maintenance of the broken pipe column is an important task in the production of the oil and gas well, and the specific position of the breakage is difficult to find due to the fact that the depth of the oil and gas well is deep, generally hundreds of meters or even thousands of meters, in the prior art, the maintenance operation is generally carried out in an integral replacement mode, namely, the upper half part of the broken pipe column is taken out firstly; then, a grinding tool is used for grinding off the packer arranged on the lower half pipe column, so that the packer falls off; then the lower half pipe column and the dropped packer are lifted out; then cleaning the whole shaft; finally, a new pipe column and a packer are put into the well, and well completion operation is carried out again, so that the whole process is time-consuming and labor-consuming; in addition, the maintenance cost is high because the whole pipe column needs to be replaced.
The utility model has the following contents:
in order to solve the problem, the utility model provides an oil production pipe connecting tool.
The technical scheme of the utility model is that: a kind of oil production string connecting tool, including the body, the body is a tubular structure, the upper portion of the body has upper joints, the inferior part of the body has guide shoes, there is a circle of milling teeth on the centre hole of the body on the upper portion of the guide shoe, mill and open a section of recess on the centre hole on the upper portion of the tooth, there are two rubber cylinders and two baffle plates in the recess sequentially at intervals upwards in the recess, there are slips on the baffle plate of the upper portion, the conical ring surface of inward contraction of the slip upper portion is connected with conical ring surface of the piston, the piston is a ring structure, open a section of piston hole to the body wall thickness along the top of the recess, the piston is connected with piston hole through the clearance fit of the seal ring, the outer ring surface of the piston opens the unidirectional tooth socket, the position of the corresponding unidirectional tooth socket, open the unidirectional tooth hole on the outer ring surface of the recess, the unidirectional tooth hole;
the upper part of the central hole of the body is provided with a tapered hole which shrinks downwards, and the central hole of the body above the tapered hole is provided with an edge hole which is communicated with the piston hole.
The slips are of a four-petal split structure, through holes are formed in the slips in the circumferential direction, the slips of the four-petal split structure are connected together through elastic rings penetrating through the slip through holes, and the slips are supported by the elastic rings to lean against the inner wall of the groove.
The taper hole can form sealing with the plugging ball under pressure, and the plugging ball is made of a dissoluble material.
The lower part of the body is provided with a circle of milling teeth, an annular groove is formed in the body on the upper part of the milling teeth, and magnets are installed in the annular groove.
The utility model discloses following beneficial effect has: in the technical scheme, the fractured end part of the casing is not processed, the oil production string connecting tool is fixedly connected to the fractured tubular column in the well in a sealing mode, and then a new casing is connected through an upper connector at the upper part of the oil production string connecting tool, so that the whole maintenance operation is completed, the processes of connection, sealing, fixing, connection and the like can be completed through one-time tool operation, meanwhile, the fractured casing at the bottom of the well is utilized, the maintenance cost is reduced, and the operation efficiency is improved.
Description of the drawings:
fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of the present invention;
fig. 3 is a schematic diagram of the operation of the present invention.
In the figure, 1-a body, 2-an upper connector, 3-a side hole, 4-a piston hole, 5-a piston, 6-a one-way tooth grooves, 7-a one-way tooth holes, 8-an elastic ring, 9-a slip, 10-a partition plate, 11-a rubber cylinder, 12-a ring groove, 13-milling teeth, 14-a guide shoe, 15-a downhole casing, 16-a plugging ball, 17-a conical hole and 18-a groove.
The specific implementation mode is as follows:
the present invention will be further explained with reference to the accompanying drawings:
referring to fig. 1 and fig. 2-3, an oil production string connecting tool comprises a body 1, the body 1 is a tubular structure, the upper part of the body 1 is provided with an upper joint 2, the lower part of the body 1 is provided with a guide shoe 14, the central hole of the body 1 on the upper part of the guide shoe 14 is provided with a circle of milling teeth 13, the central hole on the upper part of the milling teeth 13 is provided with a section of groove 18, the groove 18 is internally provided with two rubber cylinders 11 and two clapboards 10 at intervals in turn, the upper clapboard 10 is provided with a slip 9, the inward contraction conical ring surface on the upper part of the slip 9 is connected with the conical ring surface of a piston 5, the piston 5 is in an annular structure, a section of piston hole 4 is arranged towards the wall thickness of the body 1 along the top of the groove 18, the piston 5 is in clearance fit connection with the piston hole 4 through a sealing ring, the outer ring surface of the piston 5 is provided with a unidirectional tooth socket, the one-way tooth hole 7 extends downwards for a distance which is larger than the axial moving distance of the piston 5 required by the set distance of inward movement of the slips 9;
the upper part of the central hole of the body 1 is provided with a tapered hole 17 which shrinks downwards, and the central hole of the body 1 above the tapered hole 17 is provided with an edge hole 3 which is communicated with the piston hole 4.
The slips 9 are of a four-segment split structure, through holes are formed in the slips 9 in the circumferential direction, the slips 9 of the four-segment split structure are connected together through elastic rings 8 penetrating through the through holes of the slips 9, and the slips 9 are supported by the elastic rings 8 to lean against the inner wall of the groove 18.
The taper hole 17 can form a seal with the plugging ball 16 under pressure, and the plugging ball 16 is made of a dissolvable material.
The lower part of the body 1 is provided with a circle of milling teeth 13, an annular groove 12 is formed in the body on the upper part of the milling teeth 13, magnets are installed in the annular groove, the annular groove can accommodate iron cutting generated when the milling teeth mill and mill the sleeve, the iron cutting is adsorbed on the magnets, and the sealing performance of the rubber sleeve cannot be affected by the upward entering of the rubber sleeve.
In the technical scheme, the fractured end part of the casing is not processed, the oil production string connecting tool is fixedly connected to the fractured tubular column in the well in a sealing mode, and then a new casing is connected through an upper connector at the upper part of the oil production string connecting tool, so that the whole maintenance operation is completed, the processes of connection, sealing, fixing, connection and the like can be completed through one-time tool operation, meanwhile, the fractured casing at the bottom of the well is utilized, the maintenance cost is reduced, and the operation efficiency is improved.
In practice, the production string connection tool is lowered downhole, the connection tool is slipped over the downhole casing 15 using the guide shoe 14, the outer circle of the fractured underground casing is downwards milled to form a smooth outer circle surface through the milling teeth 13, the underground casing 15 on the upper part of the milling teeth 13 is used as a newly processed surface to fix and seal the underground casing, at the moment, a plugging ball 16 is put into the well, the plugging ball 16 falls into a tapered hole 17, the pipe column is pressed, the plugging ball 16 and the tapered hole 17 form a sealing effect under the pressure, the liquid with the pressure drives the piston 5 to move downwards to drive the slip 9 to move towards the underground casing 15 and tightly hoop the underground casing 15 to play a fixing effect, and the rubber cylinder 11 is expanded and tightly clung to the underground casing 15 to generate a sealing effect, so that, the tubing string connection tool is sealingly fixed to the downhole casing 15 and can be used to re-perform the production operation after the plugging ball 16 has dissolved.
Claims (4)
1. A production string connecting tool, includes body (1), its characterized in that: the body (1) is of a tubular structure, the upper part of the body (1) is provided with an upper joint (2), the lower part of the body (1) is provided with a guide shoe (14), a circle of milling teeth (13) are arranged on a central hole of the body (1) on the upper part of the guide shoe (14), a section of groove (18) is formed in the central hole on the upper part of the milling teeth (13), two rubber cylinders (11) and two partition plates (10) are sequentially arranged in the groove (18) upwards at intervals, a slip (9) is arranged on the partition plate (10) on the upper part, the inward-contracting conical ring surface on the upper part of the slip (9) is connected with the conical ring surface of a piston (5), the piston (5) is of an annular structure, a section of piston hole (4) is formed in the wall thickness of the body (1) along the top of the groove (18), the piston (5) is in clearance fit connection with the piston hole (4) through a sealing ring, the, the outer ring surface of the groove (18) is provided with a one-way tooth hole (7), the one-way tooth hole (7) extends downwards for a distance which is larger than the axial moving distance of the piston (5) required by the set distance of inward movement of the slips (9);
the upper part of the central hole of the body (1) is provided with a tapered hole (17) which shrinks downwards, and the central hole of the body (1) above the tapered hole (17) is provided with an edge hole (3) which is communicated with the piston hole (4).
2. A production string connecting tool according to claim 1, wherein: the slips (9) are of a four-petal split structure, through holes are formed in the slips (9) in the circumferential direction, the slips (9) of the four-petal split structure are connected together through elastic rings (8) penetrating through the through holes of the slips (9), and the slips (9) are supported by the elastic rings (8) to lean against the inner wall of the groove (18).
3. A production string connecting tool according to claim 1, wherein: the taper hole (17) can form sealing with the blocking ball (16) under pressure, and the blocking ball (16) is made of a dissoluble material.
4. A production string connecting tool according to claim 1, wherein: the milling machine is characterized in that a circle of milling teeth (13) are arranged on the lower portion of the body (1), an annular groove (12) is formed in the body on the upper portion of the milling teeth (13), and magnets are installed in the annular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021524594.3U CN212671599U (en) | 2020-07-29 | 2020-07-29 | Oil production pipe connecting tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021524594.3U CN212671599U (en) | 2020-07-29 | 2020-07-29 | Oil production pipe connecting tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212671599U true CN212671599U (en) | 2021-03-09 |
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ID=74817635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021524594.3U Active CN212671599U (en) | 2020-07-29 | 2020-07-29 | Oil production pipe connecting tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212671599U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117722141A (en) * | 2024-02-07 | 2024-03-19 | 大庆市瑞斯德石油机械制造有限公司 | Airtight casing nipple with special threads |
| CN117722141B (en) * | 2024-02-07 | 2024-04-26 | 大庆市瑞斯德石油机械制造有限公司 | Airtight casing nipple with special threads |
-
2020
- 2020-07-29 CN CN202021524594.3U patent/CN212671599U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117722141A (en) * | 2024-02-07 | 2024-03-19 | 大庆市瑞斯德石油机械制造有限公司 | Airtight casing nipple with special threads |
| CN117722141B (en) * | 2024-02-07 | 2024-04-26 | 大庆市瑞斯德石油机械制造有限公司 | Airtight casing nipple with special threads |
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