CN201212360Y - Ring-releasing safety joint - Google Patents
Ring-releasing safety joint Download PDFInfo
- Publication number
- CN201212360Y CN201212360Y CNU200820108600XU CN200820108600U CN201212360Y CN 201212360 Y CN201212360 Y CN 201212360Y CN U200820108600X U CNU200820108600X U CN U200820108600XU CN 200820108600 U CN200820108600 U CN 200820108600U CN 201212360 Y CN201212360 Y CN 201212360Y
- Authority
- CN
- China
- Prior art keywords
- axle
- decylization
- urceolus
- thread
- mandrel
- 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
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Abstract
The utility model relates to a disconnecting ring type safety connector. In order to overcome the problem that the structure of the prior safety connector is complex, jamming is difficult to be released when sand jamming occurs, the upper end of a mandrel (4) of the utility model is fixedly connected with an upper connector (1), and the lower end thereof is fixedly connected with an outer cylinder (6); an external spline is arranged at the middle upper part of the mandrel (4), and a shearing pin groove is arranged at the middle lower part of the mandrel (4); a disconnecting ring (3) is installed between the upper part of the outer cylinder (6) and the mandrel (4); the external thread of the disconnecting ring (3) is fixedly connected with the internal thread at the upper end part of the outer cylinder (6), and the internal spline of the disconnecting ring (3) is matched with the external spline of the mandrel (4); the connecting thread between the disconnecting ring (3) and the outer cylinder (6) adopts levorotary thread; and a shearing pin (5) is inserted into the shearing pin groove of the mandrel (4) through the radial thread of the outer cylinder (6). The utility model has the advantages that the structural design is reasonable, the disconnecting ring type safety connector is secure and reliable; the operation is simple, the success ratio is high; the use is convenient and flexible, and the disconnecting ring type safety connector can meet the requirements of the jam releasing operation of various abnormal down-hole drill jamming accidents.
Description
Affiliated technical field
The utility model relates to a kind of and the supporting downhole tool of oil and gas development underground work tubing string, particularly relates to unfreezing decylization formula safety joint a kind of and that the down-hole operating tool string is supporting.
Background technology
In the oil and gas development operation, safety joint is the special tool(s) that is used for underground work and flow string.Its effect is when down-hole string has an accident, and can throw off from safety joint meeting the card tubing string, thereby be the good condition of further processing creation of accident.Safety joint at present commonly used mainly contains two kinds of left-hand thread formula and shear pin formulas.The top connection of left-hand thread formula safety joint is connected by left hand thread with lower contact, when tubing string after card is met in the down-hole, need clockwise rotate tubing string, not in place if the complicated moment of torsion of hole condition transmits, safety joint is difficult to open, success rate is low, reliability is relatively poor; And the safety joint of conventional shear pin formula only depends on shear pin to connect upward lower contact, is subjected to the influence of operation and hole condition to cause disconnected taking off midway in the completion practice easily, causes work accident.Disclosed Chinese utility model patent on June 8th, 2005 " down-hole is communicated with the safety joint of giving up ", form by top connection, central tube, bailing cap, connection cover, lower contact etc., outer wall has a boss in the central tube bottom, there are 4 keyway shape axial pass troughs in its equal portion that directly makes progress, bailing cap bottom is 4 key shape lock pawls, the bailing cap is connected with connection set upper side right-hand thread and is enclosed within on the central tube, and the adapter sleeve lower end is connected with the lower contact left-hand thread.This safety joint is connected with the underground work tubing string, when the operation tubing string is met card, realizes that by falling a back-off oil jacket pressure balance unfreezing trips out tubing string; When tubing string is stuck, can carry out the operation of giving up of secondary back-off.Also have a kind of baroque RTTS safety joint, need first upper lifting pipe post that " tension force cover " pulled off when freeing, keep the dextrorotation moment of torsion to put on repeatedly then putting tubing string just freeing.Above-mentioned safety joint can trip out tubing string when the working string operation is simply met card, finish the operation of giving up, but its complex structure, processing, packaging technology is complicated, and tubing string sand buries when the sand card, and sand can tamp the transposition groove and can't replace, and this moment, movable again tubing string also can't be freed.
The utility model content
In order to overcome the complex structure that existing safety joint exists, processing, packaging technology is complicated, the deficiency that is difficult to unfreezing when meeting the sand card, the utility model provides the safety joint of a kind of decylization formula, and this decylization formula safety joint can be widely used in various types of down-holes construction operation.
The technical scheme that its technical problem that solves the utility model adopts is: the safety joint of decylization formula comprises top connection, axle, urceolus, fixedlys connected with top connection in the axle upper end, fixedlys connected with urceolus in the lower end; The axle middle and upper part is an external splines, and there is the shear pin groove axle middle and lower part; Between urceolus upper end and the axle decylization is installed; The external screw thread of decylization is fixedlyed connected with the internal thread of urceolus upper end, and the internal spline of decylization matches with the external splines of axle; The connecting thread of decylization and urceolus is a left hand thread; Shear pin inserts in the shear pin groove of axle middle and lower part by the radial screw bore of urceolus; Between axle upper end cylindrical and the top connection endoporus sealing ring is installed; Between axle bottom cylindrical and the urceolus endoporus sealing ring is installed.
The beneficial effects of the utility model are reasonable in design, safe and reliable; Simple to operate, the success rate height; Easy to use, flexible, unrestricted, can satisfy the unfreezing operation needs of the unusual lock of tool drilling in various down-holes.
Description of drawings
Fig. 1 is the utility model decylization formula safety joint structural representation.
Fig. 2 is the A-A sectional view of Fig. 1.
Among the figure: 1. top connection, 2. sealing ring, 3. decylization, 4. axle, 5. shear pin, 6. urceolus, 7. sealing ring.
The specific embodiment
The utility model is described in further detail below in conjunction with accompanying drawing 1, accompanying drawing 2 and embodiment.
The safety joint of the utility model decylization formula mainly comprises top connection 1, decylization 3, axle 4, shear pin 5, urceolus 6 etc.
The lower surface of top connection 1 contacts with the upper surface of urceolus 6.Between urceolus 6 upper ends and the axle 4 decylization 3 is installed.
The external surface of decylization 3 is a screw thread, and endoporus is an internal spline.The external screw thread of decylization 3 is fixedlyed connected with the internal thread of urceolus 6 upper ends; Decylization 3 is a left hand thread with the connecting thread of urceolus 6.The internal spline of decylization 3 matches with the external splines of axle 4.
The outside dimension of axle 4 middle and lower parts is less than footpath, the end size of middle and upper part external splines, and shear pin 5 inserts in the shear pin groove of axle 4 middle and lower parts by the radial screw bore of urceolus 6.The quantity of shear pin 5 is more than 2, is generally 4～8, and is uniformly distributed along the circumference.
The course of work of the present utility model is, top connection 1 upper end of the decylization formula safety joint that at first assembling is finished is connected with operating tool string with urceolus 6 lower ends, with tubing string together in the lower going-into-well.Trip out in the process of tubing string finishing construction,, continue the upper lifting pipe post and will cut off shear pin 5 if tubing string is met card; The dextrorotation tubing string is from the decylization back-off then, and the spline on the axle 4 just can trip out the chance card tubing string of urceolus more than 6 after driving decylization 3 and urceolus 6 disengagings smoothly, subsequently again with other tool strings in the fishing tool salvaging well.In addition, even shear pin 5 is cut off in maloperation in work progress, only however positive tube post just tubing string can not take place is freeing accident.
Claims (3)
1. decylization formula safety joint comprises top connection, axle, urceolus, it is characterized in that:
Fixedlying connected with top connection (1) in axle (4) upper end, fixedlys connected with urceolus (6) in the lower end; Axle (4) middle and upper part is an external splines, and there is the shear pin groove axle (4) middle and lower part;
Between urceolus (6) upper end and the axle (4) decylization (3) is installed; The external screw thread of decylization (3) is fixedlyed connected with the internal thread of urceolus (6) upper end, and the internal spline of decylization (3) matches with the external splines of axle (4);
Decylization (3) is a left hand thread with the connecting thread of urceolus (6);
Shear pin (5) inserts in the shear pin groove of axle (4) middle and lower part by the radial screw bore of urceolus (6).
2. decylization formula according to claim 1 safety joint is characterized in that: between described axle (4) upper end cylindrical and described top connection (1) endoporus sealing ring (2) is installed; Between described axle (4) bottom cylindrical and described urceolus (6) endoporus sealing ring (7) is installed.
3. decylization formula according to claim 2 safety joint is characterized in that: the quantity of described shear pin (5) is more than 2, and is uniformly distributed along the circumference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820108600XU CN201212360Y (en) | 2008-06-18 | 2008-06-18 | Ring-releasing safety joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820108600XU CN201212360Y (en) | 2008-06-18 | 2008-06-18 | Ring-releasing safety joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201212360Y true CN201212360Y (en) | 2009-03-25 |
Family
ID=40496529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820108600XU Expired - Lifetime CN201212360Y (en) | 2008-06-18 | 2008-06-18 | Ring-releasing safety joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201212360Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102852515A (en) * | 2012-09-08 | 2013-01-02 | 中国石油化工股份有限公司 | Fracture eccentric locating detector for mechanical horizontal well casing |
| WO2013007026A1 (en) * | 2011-07-14 | 2013-01-17 | 四川宏华石油设备有限公司 | Disconnector of downhole tool |
| CN104929534A (en) * | 2015-06-19 | 2015-09-23 | 安东石油技术（集团）有限公司 | Safety connector for oil field working |
| CN111827913A (en) * | 2019-04-17 | 2020-10-27 | 中国石油天然气集团有限公司 | Well drilling operation unfreezing 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 |
-
2008
- 2008-06-18 CN CNU200820108600XU patent/CN201212360Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013007026A1 (en) * | 2011-07-14 | 2013-01-17 | 四川宏华石油设备有限公司 | Disconnector of downhole tool |
| CN102852515A (en) * | 2012-09-08 | 2013-01-02 | 中国石油化工股份有限公司 | Fracture eccentric locating detector for mechanical horizontal well casing |
| CN102852515B (en) * | 2012-09-08 | 2014-12-31 | 中国石油化工股份有限公司 | Fracture eccentric locating detector for mechanical horizontal well casing |
| CN104929534A (en) * | 2015-06-19 | 2015-09-23 | 安东石油技术（集团）有限公司 | Safety connector for oil field working |
| CN104929534B (en) * | 2015-06-19 | 2017-01-18 | 安东石油技术（集团）有限公司 | Safety connector for oil field working |
| CN111827913A (en) * | 2019-04-17 | 2020-10-27 | 中国石油天然气集团有限公司 | Well drilling operation unfreezing 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 |
Granted publication date: 20090325 |
|
| CX01 | Expiry of patent term |