CN213838566U - Non-reducing casing patching tool - Google Patents
Non-reducing casing patching tool Download PDFInfo
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- CN213838566U CN213838566U CN202022983389.XU CN202022983389U CN213838566U CN 213838566 U CN213838566 U CN 213838566U CN 202022983389 U CN202022983389 U CN 202022983389U CN 213838566 U CN213838566 U CN 213838566U
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- patching
- hoop
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Abstract
The utility model provides a no undergauge sleeve pipe subsidy instrument. Relates to the technical field of oil field downhole tools. The upper and lower sides of the excircle of the patch tube are respectively provided with an expansion hoop, the upper and lower sides of the expansion hoop are provided with a step shaft on the excircle of the patch tube, the step shaft is vulcanized and fixedly connected with a sealing sleeve, the inner side of the lower sealing sleeve is provided with a lower expansion cone, the inner side of the upper sealing sleeve is provided with an upper expansion cone, and the lower expansion cone and the upper expansion cone are both fixedly connected with a pull rod. The utility model discloses following beneficial effect has: the upper and lower sealing sleeves are vulcanized and fixed on the upper and lower step shafts of the patching pipe, the upper and lower sealing is firstly carried out, the sealing layer occupies the wall thickness of the patching pipe, the reducing diameter is reduced to the minimum after patching operation of the patching pipe, the expansion patching pipe is pressed, then the expansion of the patching pipe is realized through the expansion cone, the expansion hoop is cut into the damaged sleeve pipe to meet the suspension force of the patching pipe, the suspension force and the sealing performance meet the design requirements, and the one-time operation of repairing the damaged sleeve pipe by the patching pipe can be finished.
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 there is not undergauge sleeve pipe subsidy instrument.
Background art:
the casing repairing technology is that a repairing pipe is put into a well bottom, an expansion cone is used for enabling a pipe to be permanently deformed by a hydraulic or mechanical method, so that the leakage position of a broken casing, a corroded hole pipe and other pipes can be repaired or permanently sealed by the newly-put repairing pipe, the repairing pipe is tightly attached to the inner wall of the damaged casing, a repairing pipe suspension structure is located between the outer wall of the repairing pipe and the inner wall of an outer casing, two effects are mainly achieved in construction, one effect is that enough friction force can be generated, the smooth construction process is ensured, and the weight of a repairing pipe column can be suspended after construction; the other aspect is that the hanging sealing modules at the two ends of the hole of the damaged casing pipe can have enough sealing positive pressure to seal the pressure difference between the inside and the outside of the pipe column and avoid leakage;
the thin-wall rubber ring adopted at present is sensitive to the geometric dimension of a steel pipe in the patching construction process, and is pasted on the outer wall of a patching pipe in the sealing process, so that the diameter of a sleeve is reduced in the patching process, and the suspension force is insufficient.
The utility model has the following contents:
in order to solve the problem, the utility model provides a no undergauge sleeve pipe subsidy instrument.
The technical scheme of the utility model is that: the diameter-reducing-free sleeve patching tool comprises a patching pipe, wherein the excircle of the patching pipe is respectively provided with an expansion hoop from top to bottom, the cross section of the expansion hoop is of a triangular structure with an obtuse angle at the vertex angle of the outer side, the lower side of the lower expansion hoop is provided with a lower step shaft on the excircle of the patching pipe, the lower step shaft is vulcanized and fixedly connected with a lower sealing sleeve, the upper side of the upper expansion hoop is provided with an upper step shaft on the patching pipe, and the upper step shaft is vulcanized and fixedly connected with an upper sealing sleeve;
the inner side of the lower sealing sleeve is provided with a lower expansion cone, the inner side of the upper sealing sleeve is provided with an upper expansion cone, and the lower expansion cone and the upper expansion cone are both fixedly connected with the pull rod.
The outer diameter of the lower sealing sleeve is equal to the outer diameter of the expansion hoop, and the inner diameter of the lower sealing sleeve is smaller than the inner diameter of the patch tube; the outer diameter of the upper sealing sleeve is equal to that of the expansion hoop, and the inner diameter of the upper sealing sleeve is smaller than that of the patch tube.
The outer diameter of the expansion hoop is 4-5mm larger than that of the patch tube.
The top angle of the expanding hoop is between 150 and 160 degrees.
The pull rod is provided with a communicating hole which communicates the upper surface and the lower surface of the upper expansion cone.
The utility model discloses following beneficial effect has: the upper and lower sealing sleeves are vulcanized and fixed on the upper and lower step shafts of the patching pipe, the upper and lower sealing is firstly carried out, the sealing layer occupies the wall thickness of the patching pipe, the reducing diameter is reduced to the minimum after patching operation of the patching pipe, the expansion patching pipe is pressed, then the expansion of the patching pipe is realized through the expansion cone, the expansion hoop is cut into the damaged sleeve pipe to meet the suspension force of the patching pipe, the suspension force and the sealing performance meet the design requirements, and the one-time operation of repairing the damaged sleeve pipe by the patching pipe can be finished.
Description of the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic operation diagram of the present invention;
fig. 3 is a schematic operation diagram of the present invention.
In the figure, 1-a subsidy pipe, 2-a lower expansion cone, 3-an upper expansion cone, 4-an expansion hoop, 5-a lower step shaft, 6-a lower sealing sleeve, 7-an upper step shaft, 8-an upper sealing sleeve, 9-a damaged sleeve, 10-a pull rod and 11-a communication hole.
The specific implementation mode is as follows:
the present invention will be further explained with reference to the accompanying drawings:
as shown in fig. 1 and fig. 2 to 3, the diameter-reducing-free casing patching tool comprises a patching pipe 1, wherein an expansion hoop 4 is respectively arranged at the upper part and the lower part of the excircle of the patching pipe 1, the cross section of the expansion hoop 4 is of a triangular structure with an obtuse vertex angle at the outer side, the lower side of the expansion hoop 4 at the lower part is provided with a lower step shaft 5 on the excircle of the patching pipe 1, the lower step shaft 5 is fixedly connected with a lower sealing sleeve 6 in a vulcanization mode, the upper side of the expansion hoop 4 at the upper part is provided with an upper step shaft 7 on the patching pipe 1, and the upper sealing sleeve 8 is fixedly connected on the upper step shaft 7 in a vulcanization mode;
the inner side of the lower sealing sleeve 6 is provided with a lower expansion cone 2, the inner side of the upper sealing sleeve 8 is provided with an upper expansion cone 3, and the lower expansion cone 2 and the upper expansion cone 3 are both fixedly connected with a pull rod 10.
The outer diameter of the lower sealing sleeve 6 is equal to that of the expanding hoop 4, and the inner diameter of the lower sealing sleeve is smaller than that of the patch tube 1; the outer diameter of the upper sealing sleeve 8 is equal to that of the expanding hoop 4, and the inner diameter of the upper sealing sleeve is smaller than that of the patch tube 1.
The outer diameter of the expansion hoop 4 is 4-5mm larger than that of the patch tube 1.
The vertex angle of the expanding hoop 4 is between 150 degrees and 160 degrees, and experiments prove that the expanding hoop 4 with the height and the angle is cut into the inner wall of the damaged sleeve 9, the bearing capacity is sufficient, and the damage to the damaged sleeve 9 is small.
The pull rod 10 is provided with a communicating hole 11 for communicating the pull rod 10 above and below the upper expansion cone 3.
The lower expansion cone 2 is placed at the lower part of a lower sealing sleeve 6, an upper expansion cone 3 is positioned at the lower part of an upper sealing sleeve 8, a non-reducing sleeve patching tool is lowered into a damaged part of a damaged sleeve 9 through a pull rod 10, the pull rod 10 is lifted up, the lower expansion cone 2 moves upwards, a conical ring surface of the lower expansion cone 2 supports the lower sealing sleeve 6, the lower sealing sleeve 6 expands outwards and deforms to be pasted on the inner wall of the damaged sleeve 9 to form a lower sealing of a patching pipe 1, the upper expansion cone 3 moves upwards, the conical ring surface of the upper expansion cone 3 supports the upper sealing sleeve 8, the upper sealing sleeve 8 expands outwards and deforms to be pasted on the inner wall of the damaged sleeve 9 to form an upper sealing of the patching pipe 1, at the moment, a sealing is formed between the patching pipe 1 and the damaged sleeve 9, the bottom of the patching pipe 1 is sealed by the lower sealing sleeve 6 and the lower expansion cone 2, the upper part of the patching pipe 1 is sealed by the upper expansion cone 8 and the upper expansion cone 3, the patching pipe 1 is pressurized inwards, liquid pressure enters the interior of the patching pipe 1 between the lower expansion cone 2 and the upper expansion cone 3 through a communicating pipe 11, the patching pipe 1 is pressed to expand outwards, the patching pipe 1 is subjected to plastic deformation and is pasted on the inner wall of a damaged sleeve 9, an upper sealing sleeve 8 positioned on an upper step shaft 7 part is compressed to form an upper sealing, a lower sealing sleeve 6 positioned on a lower step shaft 5 part is compressed to form a lower sealing, then the pressing is stopped, a pull rod is lifted upwards, a lower expansion cone 2 moves upwards, the patching pipe 1 is further expanded outwards, an extrusion fit state is formed between the outer wall of the patching pipe 1 and the damaged sleeve 9, and meanwhile, the lower expansion cone 2 presses an expansion hoop 4 to extrude and cut into the inner wall of the damaged sleeve 9, so that the suspension force of the patching pipe 1 is further improved.
The upper and lower sealing sleeves are vulcanized and fixed on the upper and lower step shafts of the patching pipe, the upper and lower sealing is firstly carried out, the sealing layer occupies the wall thickness of the patching pipe, the reducing diameter is reduced to the minimum after patching operation of the patching pipe, the expansion patching pipe is pressed, then the expansion of the patching pipe is realized through the expansion cone, the expansion hoop is cut into the damaged sleeve 9 to meet the suspension force of the patching pipe, and the suspension force and the sealing performance meet the design requirements.
Claims (5)
1. The utility model provides a there is not undergauge sleeve pipe subsidy instrument, includes subsidy pipe (1), its characterized in that: the upper and lower parts of the excircle of the subsidy pipe (1) are respectively provided with an expansion hoop (4), the section of each expansion hoop (4) is of a triangular structure with an obtuse vertex angle at the outer side, the lower side of the lower expansion hoop (4) is provided with a lower step shaft (5) on the excircle of the subsidy pipe (1), the lower step shaft (5) is vulcanized and fixedly connected with a lower sealing sleeve (6), the upper side of the upper expansion hoop (4) is provided with an upper step shaft (7), and the upper step shaft (7) is vulcanized and fixedly connected with an upper sealing sleeve (8);
the inner side of the lower sealing sleeve (6) is provided with a lower expansion cone (2), the inner side of the upper sealing sleeve (8) is provided with an upper expansion cone (3), and the lower expansion cone (2) and the upper expansion cone (3) are fixedly connected with a pull rod (10).
2. The diameter shrinkage free sleeve patch tool of claim 1, wherein: the outer diameter of the lower sealing sleeve (6) is equal to that of the expanding hoop (4), and the inner diameter of the lower sealing sleeve is smaller than that of the patch tube (1); the outer diameter of the upper sealing sleeve (8) is equal to that of the expanding hoop (4), and the inner diameter of the upper sealing sleeve is smaller than that of the patch tube (1).
3. The diameter shrinkage free sleeve patch tool of claim 1, wherein: the outer diameter of the expanding hoop (4) is 4-5mm larger than that of the patch tube (1).
4. The diameter shrinkage free sleeve patch tool of claim 1, wherein: the top angle of the expanding hoop (4) is between 150 and 160 degrees.
5. The diameter shrinkage free sleeve patch tool of claim 1, wherein: the pull rod (10) is provided with a connecting hole (11) for connecting the pull rod (10) above and below the upper expansion cone (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022983389.XU CN213838566U (en) | 2020-12-11 | 2020-12-11 | Non-reducing casing patching tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022983389.XU CN213838566U (en) | 2020-12-11 | 2020-12-11 | Non-reducing casing patching tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213838566U true CN213838566U (en) | 2021-07-30 |
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ID=76998111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022983389.XU Active CN213838566U (en) | 2020-12-11 | 2020-12-11 | Non-reducing casing patching tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213838566U (en) |
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2020
- 2020-12-11 CN CN202022983389.XU patent/CN213838566U/en active Active
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