CN201943597U - Hydraulic safety joint - Google Patents
Hydraulic safety joint Download PDFInfo
- Publication number
- CN201943597U CN201943597U CN2010206856643U CN201020685664U CN201943597U CN 201943597 U CN201943597 U CN 201943597U CN 2010206856643 U CN2010206856643 U CN 2010206856643U CN 201020685664 U CN201020685664 U CN 201020685664U CN 201943597 U CN201943597 U CN 201943597U
- Authority
- CN
- China
- Prior art keywords
- axle
- top connection
- joint
- mandrel
- lower contact
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000006835 compression Effects 0.000 claims abstract description 11
- 238000007906 compression Methods 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims description 5
- 238000010276 construction Methods 0.000 abstract description 4
- 239000003208 petroleum Substances 0.000 abstract description 4
- 230000008439 repair process Effects 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 abstract 1
- 239000003129 oil well Substances 0.000 abstract 1
- 230000008878 coupling Effects 0.000 description 7
- 238000010168 coupling process Methods 0.000 description 7
- 238000005859 coupling reaction Methods 0.000 description 7
- 238000005553 drilling Methods 0.000 description 7
- 210000002445 nipple Anatomy 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000007812 deficiency Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
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- Earth Drilling (AREA)
Abstract
A hydraulic safety joint is applied to the technical field of petroleum well repair and salvage operation. A mandrel is arranged in the upper joint; the upper end of the mandrel is fixed in a central hole of the upper joint through a pin; an outer hexagon in the middle of the mandrel is in an inner hexagon hole of the upper joint; an annular space is arranged at the lower part of the hexagonal body outside the mandrel and between the inner wall of the upper joint and the outer wall of the mandrel, a compression spring is arranged in the annular space, and an annular retaining ring is fixed in the annular space at the lower part of the compression spring through a bolt; the lower end of the upper joint is connected with a lower joint through right-hand threads; the inner wall of the upper end of the lower joint is an inner hexagonal hole, the lower end of the mandrel is provided with an outer hexagonal body, and the outer hexagonal body of the mandrel is arranged in the inner hexagonal hole of the lower end of the lower joint. The effect is as follows: the safety release of the tubular column in the fishing operation of the oil well workover major repair can be realized, and the defect that the fishing tubular columns of the male cone and the female cone cannot be withdrawn is overcome. The fishing success rate is improved, and the risk in construction is reduced.
Description
Technical field
The utility model relates to petroleum well workover, fishing technical field, a kind of liquid hand safety joint in particularly a kind of well workover, the fishing string.
Background technology
During the oil field heavy repair task, the formed resultant force of complicated industrial and mineral in the well can not be analyzed and be judged fully on ground.Thereby in well workover construction, exist on the unavoidable various risk, the particularly use to fishing tool, the careless slightly tubing string that will cause is stuck in the down-hole, will cause the complicated of the failure of scheme and well internal state even cause second accident.
After tubing string is stuck in the down-hole, often adopt die nipple, female coupling tap fishing string, die nipple, female coupling tap salvage that scope is wide, load is big, and fishing operation is easy to learn, easy to operate, is one of widely used fishing tool in present oil field.But since such instrument have can not moving back property, more increased the salvaging construction risk, hindered the performance that die nipple, female coupling tap are salvaged advantage.For example resemble die nipple, female coupling tap can not move back fishing tool like this time because of the needs of hole condition force us to use sometimes, do not separate card when the easiest generation is salvaged, do not open the phenomenon of buckleing.This type of accident occurs in deep-well, handles second accident, and expense height, cycle are long, even are in runaway condition, cause the salvaging material to waste greatly.
At present, solution can not be moved back the fishing string problem, and what mainly adopt is to connect zigzag safety joint or square button-type safety joint on die nipple, female coupling tap fishing tool top.But these two kinds of safety joints thread rotary orientation all consistent with drilling tool, drilling tool connecting thread pretightning force is inconsistent, the success rate of giving up smoothly from safety joint in actual job is not high.
The utility model content
The purpose of this utility model is: a kind of hydraulic safe joint is provided, can realizes that tubing string safety is given up in the petroleum well workover overhaul fishing, the deficiency that solution die nipple, female coupling tap fishing string can not move back.
The technical solution adopted in the utility model is: the hydraulic safe joint, mainly to form by top connection, pin, axle, compression spring, bolt, baffle ring and lower contact, and there is internal thread the upper end of top connection, can be connected with fishing string; It is characterized in that: axle is arranged in top connection, and axle has centre bore; The upper end of axle in the centre bore of top connection, the upper end of axle by dowel fixes in the centre bore of top connection; Interior hexagonal hole is arranged at the bottom of top connection centre bore; There is outer hexahedron at the axle middle part, and the outer hexahedron at axle middle part is in the interior hexagonal hole of top connection; The bottom of hexahedron and between the outer wall of top connection inwall and axle, annular space is arranged outside axle, in the annular space between top connection inwall and the axle outer wall compression spring is arranged, by bolt annular baffle ring is arranged in the bottom of compressing spring and the annular space between top connection and axle, baffle ring is fixed on the lower contact inwall; Lower end in top connection is connected with lower contact by right-handed thread (left-hand thread), and lower contact has centre bore; Lower contact upper end inwall is interior hexagonal hole, and there is outer hexahedron the axle lower end, axle outward hexahedron in the lower contact lower end in the hexagonal hole.
In order to improve the sealing between top connection and the axle, on the outer wall of axle upper end, seal groove is arranged, sealing ring is arranged in seal groove.
The beneficial effects of the utility model: the utility model hydraulic safe joint, can realize that tubing string safety is given up in the petroleum well workover overhaul fishing, top connection is threaded with the lower contact left-hand thread, it is all consistent with drilling tool to change the give up thread rotary orientation of part of existing zigzag safety joint or square button-type safety joint, the deficiency that solution die nipple, female coupling tap fishing string can not move back.Improve fishing success ratio, reduced the risk that exists in the construction.
Description of drawings
Fig. 1 is the utility model hydraulic safe joint design generalized section.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is the B-B sectional view of Fig. 1.
Among the figure, the 1-top connection, the 2-steel ball, the 3-sealing ring, the 4-pin, the 5-axle, 6-compresses spring, 7-bolt, 8-baffle ring, 9-lower contact.
The specific embodiment
Embodiment 1: with a hydraulic safe joint is example, and the utility model is described in further detail.
Consult Fig. 1.The utility model hydraulic safe joint mainly is made up of top connection 1, sealing ring 3, pin 4, axle 5, compression spring 6, bolt 7, baffle ring 8 and lower contact 9.There is the API standard female upper end of top connection 1.
Consult Fig. 2.Interior hexagonal hole is arranged at the bottom of top connection 1 centre bore; There is outer hexahedron at axle 5 middle parts, and the outer hexahedron at axle 5 middle parts is in the interior hexagonal hole of top connection 1.
Consult Fig. 1.The bottom of hexahedron and between the outer wall of top connection 1 inwall and axle 5, annular space is arranged outside axle 5, compression spring 6 is arranged in the annular space between top connection 1 inwall and axle 5 outer walls, be fixed with an annular baffle ring 8 by bolt 7 in the bottom of compressing spring 6 and the annular space between top connection 1 and axle 5, baffle ring 8 is fixed on lower contact 9 inwalls; Lower end in top connection 1 is connected with lower contact 9 by right-handed thread (left-hand thread), and lower contact 9 has centre bore.
Consult Fig. 3.Lower contact 9 upper end inwalls are interior hexagonal hole, and there is outer hexahedron axle 5 lower ends, and axle 5 outer hexahedrons are in lower contact 9 lower ends in the hexagonal hole.
The operating process and the principle of summary hydraulic safe joint.Consult Fig. 1.Last procedure of assembling is to promote axle 5 and compress compression spring 6, is fixed in the centre bore of top connection 1 with the upper end of four pins 4 with axle 5 then.The hydraulic safe joint is connected the top of the fishing tool of fishing string, goes into well with fishing string.Six sides and axle 5 middle part hexahedron transfer torques in the top connection 1; And six side's transfer torques in axle 5 lower end hexahedrons and the top connection 1 are realized the fishing string rotation and are carried out fishing.Meet card when salvaging, when not opening the phenomenon of button, need give up.At first, in fishing string, drop into steel ball 2, treat that steel ball 2 arrives axle 5 head bases and is honored as a queen, slowly build the pressure, axle 5 is moved down cut off pin 4 at well head.Pressure release then, compression spring 6 promote axle 5 and move up, and hexagonal hole is thrown off in axle 5 lower end hexahedrons and the lower contact 9.Press drilling tool this moment and connect rotation direction rotation drilling tool, top connection 1 separates with lower contact 9 connecting thread shackles; On carry drilling tool, baffle ring 8 is asking compression spring 6, axle 5 and steel ball 2 to propose the shaft bottom with drilling tool, realizes giving up.Only stay the lower contact 9 of safety joint in the well.
Claims (2)
1. a hydraulic safe joint mainly is made up of top connection (1), pin (4), axle (5), compression spring (6), bolt (7), baffle ring (8) and lower contact (9), and there is internal thread the upper end of top connection (1); It is characterized in that: axle (5) is arranged in top connection (1), and axle (5) has centre bore; The upper end of axle (5) is in the centre bore of top connection (1), and the upper end of axle (5) is fixed in the centre bore of top connection (1) by pin (4); Interior hexagonal hole is arranged at the bottom of top connection (1) centre bore; There is outer hexahedron at axle (5) middle part, and the outer hexahedron at axle (5) middle part is in the interior hexagonal hole of top connection (1); The bottom of hexahedron and between the outer wall of top connection (1) inwall and axle (5), annular space is arranged outside axle (5), in the annular space between top connection (1) inwall and axle (5) outer wall compression spring (6) is arranged, be fixed with annular baffle ring (8) by bolt (7) in the bottom of compressing spring (6) and the annular space between top connection (1) and axle (5), baffle ring (8) is fixed on lower contact (9) inwall; Lower end in top connection (1) is connected with lower contact (9) by right-handed thread, and lower contact (9) has centre bore; Lower contact (9) upper end inwall is interior hexagonal hole, and there is outer hexahedron axle (5) lower end, and the outer hexahedron of axle (5) is in lower contact (9) lower end in the hexagonal hole.
2. hydraulic safe joint according to claim 1 is characterized in that: on the outer wall of axle (5) upper end seal groove is arranged, sealing ring (3) is arranged in seal groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206856643U CN201943597U (en) | 2010-12-17 | 2010-12-17 | Hydraulic safety joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206856643U CN201943597U (en) | 2010-12-17 | 2010-12-17 | Hydraulic safety joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201943597U true CN201943597U (en) | 2011-08-24 |
Family
ID=44470946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206856643U Expired - Lifetime CN201943597U (en) | 2010-12-17 | 2010-12-17 | Hydraulic safety joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201943597U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405363A (en) * | 2014-10-10 | 2015-03-11 | 宝鸡金辉石油机械有限公司 | Safe fast connecting mode and safe fast connector |
| CN105545222A (en) * | 2016-01-22 | 2016-05-04 | 东营市兆鑫工贸有限责任公司 | Safety trip device for fracturing string |
| CN112855041A (en) * | 2021-03-11 | 2021-05-28 | 中海艾普油气测试（天津）有限公司 | Safety joint for testing lower part of packer and releasing method thereof |
-
2010
- 2010-12-17 CN CN2010206856643U patent/CN201943597U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405363A (en) * | 2014-10-10 | 2015-03-11 | 宝鸡金辉石油机械有限公司 | Safe fast connecting mode and safe fast connector |
| CN105545222A (en) * | 2016-01-22 | 2016-05-04 | 东营市兆鑫工贸有限责任公司 | Safety trip device for fracturing string |
| CN105545222B (en) * | 2016-01-22 | 2017-10-10 | 东营市兆鑫工贸有限责任公司 | A kind of fracturing string safety trip device |
| CN112855041A (en) * | 2021-03-11 | 2021-05-28 | 中海艾普油气测试（天津）有限公司 | Safety joint for testing lower part of packer and releasing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110824 |