CN204788849U - Outer detection device of casing thread leakproofness - Google Patents
Outer detection device of casing thread leakproofness Download PDFInfo
- Publication number
- CN204788849U CN204788849U CN201520372008.0U CN201520372008U CN204788849U CN 204788849 U CN204788849 U CN 204788849U CN 201520372008 U CN201520372008 U CN 201520372008U CN 204788849 U CN204788849 U CN 204788849U
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- CN
- China
- Prior art keywords
- sealing rubber
- sealing
- caulking gum
- cover plate
- shell
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- Expired - Fee Related
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Abstract
The utility model relates to an outer detection device of casing thread leakproofness overlaps the outside from oil pipe and carries out the measuring of thread sealing nature, and it is lapped down by the upper cover plate, goes up sealing rubber, lower sealing rubber, and the shell, the toper piece is gone up to the pneumatic cylinder, lower toper block group one -tenth. Thereby the pneumatic cylinder drives upper cover plate and apron down and drives to the centre extrusion and go up the toper piece and make progress sealing rubber one side and move, and the downward sealing rubber of lower toper piece moves one side, go up sealing rubber, down the sealing rubber pressurized fill the space that becomes by sealing device and sheathed tube top and bottom table shape of face gradually, finally at last sealing rubber between sealing rubber and the sleeve pipe airtight cavity of formation under, and the casing thread seam crossing is in inclosed space. The utility model discloses structure and easy operation, check -out time weak point, through the pneumatic pump in to the cavity pressurization whether reduce with the atmospheric pressure in the instrument check airtight space to stipulating the requirement to can judge whether the casing thread seam crossing exists the leakage.
Description
Technical field
The utility model relates to the outer pick-up unit of a kind of casing threads sealing, carries out thread seal detection, belong to the Casing Detection device in petroleum gas field from oil pipe cover outside.
Background technology
In the middle of oil-gas field development, due to casing threads mismachining tolerance, transport or operation process in collide with, microcorrosion, the choice and operation of stop-leak compound, the selection of torque wrench moment value scope, the factor such as clean of screw thread and sealing surface, particularly in high-pressure gas well casing job process, torque wrench moment is unreasonable, oil pipe is Reusability etc. repeatedly, very easily causes casing threads gas tightness to lose efficacy.So when entering sleeve pipe under well head, require that sealing property test is carried out in right casing threads junction, and sealing property test is carried out on drilling platform; May be used for helping to solve oil gas field strong well, high sour well, the blow-by of emphasis well casing string for a long time by detecting casing threads gas tightness, the problems such as the engineering safety that well head gas blowby etc. relates to, later development, therefore detection thimble gas tightness is the necessary means stopping potential safety hazard.
Because casing threads hermetic seal test is carried out on drilling platform, its space is restricted, and require that the test duration is as far as possible short, the oil pipe hermetic seal detection means of current down-hole has will two kinds: 1, detected bobbin seal by hydrostatic pressing sealing property test experiments method, the disadvantage of the method is: string of casing is made up of hundreds and thousands of sleeve pipe of wanting, when finding pressure drop in sleeve pipe, leakage point that can not be really concrete fast; 2, by transferring interior pick-up unit to inside pipe casing, interior pick-up unit double thread place sealing property detects, the method often detects once needs interior pick-up unit to put into sleeve pipe, again interior pick-up unit is taken out after having detected, operating process is too complicated, need many groups personnel to coordinate just can complete, setup time is long, is unfavorable for high-efficient homework.
Summary of the invention
The technical matters that the purpose of this utility model checks to overcome traditional sleeve thread seal, provides a kind of casing threads sealing outer pick-up unit, from the outside device carrying out thread seal detection of oil pipe cover.
The technical solution of the utility model is:
The outer pick-up unit of a kind of casing threads sealing of the utility model, by upper cover plate, lower cover, upper caulking gum, lower seal rubber, shell, hydraulic cylinder, upper conical piece, inferior pyramidal block forms.Hydraulic cylinder drive upper cover plate and lower cover to centre extruding thus drive upper conical piece upwards caulking gum side move, the downward caulking gum side of inferior pyramidal block is moved; Upper caulking gum, lower seal rubber pressurized fill the space formed by the upper and lower surface of packoff and sleeve pipe gradually, and finally at upper caulking gum, form airtight cavity between lower seal rubber and sleeve pipe, and casing threads seam is in airtight space.
Be support with shell, use between circular cone and shell, lower seal rubber realizes sealing; Three identical hydraulic cylinder circumferences are evenly arranged in ambient envelope, hydraulic cylinder connects upper cover plate and lower cover up and down respectively, during work, hydraulic cylinder drives upper conical piece, inferior pyramidal block extrudes to centre, cause caulking gum, lower seal rubber extrudes mutually, and finally fill the space formed by sleeve pipe and packoff, at upper caulking gum, between lower seal rubber and sleeve pipe, form airtight cavity; In airtight space, inject gases at high pressure, when pressure reaches default value, carry out voltage stabilizing, whether reduce with the air pressure that instrument detects in confined space simultaneously, thus can judge whether casing threads seam crossing exists leakage.
The utility model has the advantages that: structure and simple to operate, detection time is short; In cavity, be forced into regulation requirement by air lift pump, shelve the stipulated time, whether reduce with the air pressure that instrument detects in confined space, thus can judge whether casing threads seam crossing exists leakage.
Accompanying drawing explanation
Fig. 1 is the structural representation of the outer pick-up unit of a kind of casing threads sealing of the utility model.
In figure: 1. upper cover plate, 2. upper conical piece, 3. go up caulking gum, 4. lower seal rubber, 5. inferior pyramidal block, 6. lower cover, 7. shell, 8. hydraulic cylinder, 9. space, 10. sleeve pipe.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further illustrated:
As shown in Figure 1, the outer pick-up unit of a kind of casing threads sealing of the utility model, by upper cover plate 1, lower cover 6, upper caulking gum 3, lower seal rubber 4, shell 7, hydraulic cylinder 8, upper conical piece 2, inferior pyramidal 5 pieces composition.Hydraulic cylinder 8 drive upper cover plate 1 and lower cover 6 to centre extruding thus drive upper conical piece 2 upwards caulking gum 3 side move, inferior pyramidal block 5 moves caulking gum 4 side downwards; Upper caulking gum 3, lower seal rubber 4 pressurized fill the space 9 formed by the upper and lower surface of packoff and sleeve pipe 10 gradually, final at upper caulking gum 3, form airtight cavity between lower seal rubber 4 and sleeve pipe 10, and casing threads seam is in airtight space.
With shell 7 for support, upper conical piece 2, realize sealing with caulking gum 3, lower seal rubber 4 between inferior pyramidal block 5 and shell 7; Three identical hydraulic cylinder 8 circumferences are evenly arranged in around shell 7, and hydraulic cylinder about 8 connects upper cover plate 1 and lower cover 6 respectively.
In cavity, be forced into regulation requirement by air lift pump during work, shelve the stipulated time, whether reduce with the air pressure that instrument detects in confined space, thus can judge whether casing threads seam crossing exists leakage.
Claims (2)
1. the outer pick-up unit of casing threads sealing, by upper cover plate (1), lower cover (6), upper caulking gum (3), lower seal rubber (4), shell (7), hydraulic cylinder (8), upper conical piece (2), inferior pyramidal (5) block forms, it is characterized in that: hydraulic cylinder (8) drives upper cover plate (1) and lower cover (6) to centre extruding thus drives upper conical piece (2) upwards to move caulking gum (3) side, and inferior pyramidal block (5) moves caulking gum (4) side downwards; Upper caulking gum (3), lower seal rubber (4) pressurized fill the space (9) formed by the upper and lower surface of packoff and sleeve pipe (10) gradually, final at upper caulking gum (3), form airtight cavity between lower seal rubber (4) and sleeve pipe (10), and casing threads seam is in airtight space.
2. the outer pick-up unit of a kind of casing threads sealing according to claim 1, it is characterized in that: with shell (7) for support, upper conical piece (2), realize sealing with caulking gum (3), lower seal rubber (4) between inferior pyramidal block (5) and shell (7); Three identical hydraulic cylinder (8) circumferences are evenly arranged in shell (7) around, and hydraulic cylinder (8) connects upper cover plate (1) and lower cover (6) up and down respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520372008.0U CN204788849U (en) | 2015-06-03 | 2015-06-03 | Outer detection device of casing thread leakproofness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520372008.0U CN204788849U (en) | 2015-06-03 | 2015-06-03 | Outer detection device of casing thread leakproofness |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204788849U true CN204788849U (en) | 2015-11-18 |
Family
ID=54528869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520372008.0U Expired - Fee Related CN204788849U (en) | 2015-06-03 | 2015-06-03 | Outer detection device of casing thread leakproofness |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204788849U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105387980A (en) * | 2015-11-25 | 2016-03-09 | 西南石油大学 | Sleeve thread airtightness external detection device |
| CN108195528A (en) * | 2018-01-04 | 2018-06-22 | 中广核核电运营有限公司 | The airtight test structure of generator outlet casing and system |
| CN112304534A (en) * | 2020-09-28 | 2021-02-02 | 中国石油天然气集团有限公司 | Oil casing pipe simulation sealing test device and test method |
-
2015
- 2015-06-03 CN CN201520372008.0U patent/CN204788849U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105387980A (en) * | 2015-11-25 | 2016-03-09 | 西南石油大学 | Sleeve thread airtightness external detection device |
| CN108195528A (en) * | 2018-01-04 | 2018-06-22 | 中广核核电运营有限公司 | The airtight test structure of generator outlet casing and system |
| CN112304534A (en) * | 2020-09-28 | 2021-02-02 | 中国石油天然气集团有限公司 | Oil casing pipe simulation sealing test device and test method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151118 Termination date: 20160603 |