CN201554386U - Safety joint - Google Patents
Safety joint Download PDFInfo
- Publication number
- CN201554386U CN201554386U CN2009202776149U CN200920277614U CN201554386U CN 201554386 U CN201554386 U CN 201554386U CN 2009202776149 U CN2009202776149 U CN 2009202776149U CN 200920277614 U CN200920277614 U CN 200920277614U CN 201554386 U CN201554386 U CN 201554386U
- Authority
- CN
- China
- Prior art keywords
- ring
- interior
- hexahedron
- sides
- safety joint
- 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
Images
Landscapes
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
The utility model discloses a safety joint and aims at overcoming the shortages of a large number of parts, complicated structure and situation of affecting the normal production due to the damages of the parts in the existing safety joint. A back tightening ring (5), an inner hexahedron sleeve (7) and a lower joint (8) are sequentially fixedly connected from top to bottom, and a connecting thread of the inner hexahedron sleeve (7) and the lower joint (8) is left-handed; an outer hexahedron sleeve (2) is mounted in an inner hexahedron of the inner hexahedron sleeve (7); an outer boss is arranged above an outer hexahedron of the outer hexahedron sleeve (2), and a shear ring (4) is fixedly mounted between the outer boss and the axial direction of the lower end surface of an inner step hole of the back tightening ring (5); the diameter of the outer boss of the outer hexahedron sleeve (2) is smaller than that of the inner step hole of the back tightening ring (5); and the length of the hexahedron of the outer hexahedron sleeve (2) which is matched with the inner hexahedron sleeve (7) is larger than the length of the step hole of the shear ring (4) fixed by the back tightening ring (5). The safety joint has the benefits of simple structure, flexible operation, safety, reliability and capability of effectively avoiding the overhaul caused by locking of a pipe string or operation errors.
Description
Affiliated technical field
The utility model relates to a kind of oil and gas development underground work and flow string, the especially safety joint of oil and gas development underground work and flow string.
Background technology
In the oil and gas development process, 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 generally is used in the comparatively complicated construction well of tubular column structure and has in the well that special operation requires.The safety joint that mechanical type is commonly used at present mainly contains two kinds of left-hand thread formula and pull-types.The top connection of left-hand thread formula safety joint directly is connected by left hand thread with lower contact, meets card or operate miss in tubing string is being gone into the well process, easily causes the safety joint generation of back-off phenomenon midway, and security reliability is relatively poor; And the pull-type safety joint only depends on lower contact in shear pin (or snip) connection, is subjected to the influence (as: well head, lowering velocity too fast) of operation and hole condition in the completion practice easily and causes disconnected taking off midway, causes work accident.Disclosed Chinese utility model patent on January 16th, 2008 " pull-type safety joint " (publication number CN201007186), top connection, adapter sleeve, anti-pivoted housing, back-off sub from top to bottom connect successively; Between the small stair end face piston is installed in top connection bottom and the back-off sub; Shear pin inserts in the groove of piston by the screwed hole of adapter sleeve; The anti-back jump ring is installed in the circumferential groove of piston; Lock dog is installed in the back-off sub body groove, and the small end of piston matches with the endoporus of back-off sub; Be equipped with between the interior stepped hole end face of the lower surface of adapter sleeve and anti-rotation set upper side and cut ring.This joint has good safety, reliability and validity in application, but component are many, and complex structure influences normal production operation because of damage of components easily.
The utility model content
Many in order to overcome the component that exist in the existing safety joint, complex structure influences the deficiency of ordinary production operation easily because of damage of components, and the utility model provides a kind of safety joint.
The technical scheme that its technical problem that solves the utility model adopts is: safety joint comprises top connection, lower contact, cuts ring, the upper end of top connection is connected with operating tool string respectively with the lower end of lower contact, the tight ring of the back of the body, interior six sides cover, lower contact from top to bottom are fixedly connected sequentially, and interior six sides cover is left-handed with the connecting thread of lower contact; Outer six sides cover is installed in the interior hexagonal hole of interior six sides cover; The outer hexahedron top that outer six sides overlap is an outer lug boss, is installed with between the interior shoulder hole lower surface of outer lug boss and the tight ring of the back of the body is axial and cuts ring; The outer lug boss diameter of outer six sides cover is less than the interior shoulder hole diameter of the tight ring of the back of the body; The length that the tight ring of length＞back of the body of the hexahedron that outer six sides cover matches with interior six sides cover is fixedly cut ring top shoulder hole.
The beneficial effects of the utility model are, and are simple in structure, and flexible operation is safe and reliable, can effectively avoid owing to tubing string is met the heavy repair task that card or operate miss cause.
Description of drawings
Fig. 1 is the structural representation of the utility model safety joint.
Fig. 2 is the A-A sectional drawing of Fig. 1.
Among the figure: 1. top connection, 2. outer six sides cover, 3. sealing ring is 4. cut ring, the 5. tight ring of the back of the body, 6. sealing ring, 7. in six sides overlap 8. lower contact, 9. 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 utility model safety joint comprises top connection 1, lower contact 8, interior six sides cover 7, outer six sides cover 2, cuts ring 4, the tight ring 5 of the back of the body, and the lower end of the upper end of top connection 1 and lower contact 8 is connected with operating tool string respectively.The tight ring 5 of the back of the body, interior six sides cover 7, lower contact 8 from top to bottom are fixedly connected sequentially, and interior six sides cover 7 is left-handed with the connecting thread of lower contact 8; Outer six sides cover 2 is installed in the interior hexagonal hole of interior six sides cover 7.
The tight ring of the back of the body 5 endoporus are up-small and down-big shoulder hole, and have three cascaded surfaces at least, and the lower end is threaded with interior six sides cover 7.The bottom of outer six sides cover 2 is outer hexahedron, and outer hexahedron top be an outer lug boss, and outer lug boss is installed with to cut between axial with the interior shoulder hole lower surface of the tight ring 5 of the back of the body encircles 4; The outer lug boss diameter of outer six sides cover 2 is less than the interior shoulder hole diameter of the tight ring 5 of the back of the body.Outer six sides cover 2 tightly encircles the length of fixedly cutting ring 4 shoulder holes on 5 with the length of interior six sides cover, 7 hexahedrons that match greater than carrying on the back, and guaranteeing can have enough Free up Memories after the tubing string chance is blocked.Fixedly connected with top connection 1 lower end in outer six sides cover 2 upper ends.
Cut on ring 4 the circumference and have 1 opening at least, cutting ring 4 usually is that two semi-rings are formed.Cut ring 4 and select copper material usually for use.
In order to guarantee that the utility model safety joint has good safety performance, connecting thread is not damaged in the normal use, in the back of the body tight ring 5 upper ends and outer six sides cover 2 matching surfaces radial direction seal ring 3 is installed; The back of the body tight ring 5 lower ends and interior six sides cover 7 matching surfaces are equipped with radial direction seal ring 6; Interior six sides cover 7 lower ends and lower contact 8 matching surfaces are equipped with radial direction seal ring 9.
The utility model embodiment is, top connection 1 upper end and lower contact 8 lower ends of safety joint are connected with the construction operation tubing string respectively in the lower going-into-well of back.Owing to cut the left-handed connecting thread effect of ring 4 and interior six sides cover 7 and lower contact 8, can not make safety joint back-off or cut ring and cut off the phenomenon generation midway because of maloperation.
After finishing construction operation, in tripping out the process of tubing string if tubing string is met card, the upper lifting pipe post, when on the power of lifting when reaching certain value, cut off and cut ring 4; The tubing string that turns clockwise then, six sides cover 7 rotated together in outer six sides cover 2 drove, until interior six sides overlap 7 with lower contact 8 between left-handed connecting thread be connected and separate; Interior six sides cover 7 with the tripping out smoothly of the chance card tubing string of upper part, is salvaged other tool strings in the well with fishing tool subsequently again.
It should be noted that the foregoing description is example and unrestricted the invention, those skilled in the art can design a lot of alternate embodiments and not break away from the scope of claims.
Claims (6)
1. safety joint comprises top connection, lower contact, cuts ring, and the upper end of top connection is connected with operating tool string respectively with the lower end of lower contact, it is characterized in that:
The tight ring of the back of the body (5), interior six sides covers (7), lower contact (8) from top to bottom are fixedly connected sequentially, and interior six sides covers (7) are left-handed with the connecting thread of lower contact (8); Outer six sides covers (2) are installed in the interior hexagonal hole of interior six sides covers (7);
The outer hexahedron top that outer six sides overlap (2) is an outer lug boss, is installed with between the interior shoulder hole lower surface of outer lug boss and the tight ring of the back of the body (5) is axial and cuts ring (4); The outer lug boss diameter of outer six sides covers (2) is less than the interior shoulder hole diameter of the tight ring of the back of the body (5);
Outer six sides covers (2) tightly encircle the length that (5) fixedly cut ring (4) top shoulder hole with length＞back of the body that interior six sides overlap the hexahedron that (7) matches.
2. safety joint according to claim 1 is characterized in that: described top connection (1) lower end and outer six sides overlap (2) upper end fixedlys connected.
3. safety joint according to claim 2, it is characterized in that: the described back of the body tightly encircles (5) upper end and with outer six sides cover (2) matching surface radial direction seal ring (3) is installed, the back of the body tight ring (5) lower end and interior six sides cover (7) matching surface are equipped with radial direction seal ring (6), and interior six sides cover (7) lower end and lower contact (8) matching surface are equipped with radial direction seal ring (9).
4. safety joint according to claim 3 is characterized in that: have 1 opening at least on the described circumference of cutting ring (4).
5. safety joint according to claim 4 is characterized in that: the described ring (4) of cutting is two semi-rings.
6. safety joint according to claim 5 is characterized in that: the described ring (4) of cutting is a copper material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202776149U CN201554386U (en) | 2009-11-25 | 2009-11-25 | Safety joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202776149U CN201554386U (en) | 2009-11-25 | 2009-11-25 | Safety joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201554386U true CN201554386U (en) | 2010-08-18 |
Family
ID=42614068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202776149U Expired - Lifetime CN201554386U (en) | 2009-11-25 | 2009-11-25 | Safety joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201554386U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102926694A (en) * | 2012-12-03 | 2013-02-13 | 中国石油集团川庆钻探工程有限公司井下作业公司 | Mechanical releasing device for coiled-tubing fracturing |
| CN106837197A (en) * | 2017-03-09 | 2017-06-13 | 长江大学 | A kind of anti-disabling device of the anti-brake tool of flexible strand |
| CN109779537A (en) * | 2019-01-23 | 2019-05-21 | 中国海洋石油集团有限公司 | A kind of safety joint |
| CN115126743A (en) * | 2022-07-06 | 2022-09-30 | 莱州亚通重型装备有限公司 | Built-in hexagonal anti-rotation mechanism oil cylinder with position feedback for coal mine |
-
2009
- 2009-11-25 CN CN2009202776149U patent/CN201554386U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102926694A (en) * | 2012-12-03 | 2013-02-13 | 中国石油集团川庆钻探工程有限公司井下作业公司 | Mechanical releasing device for coiled-tubing fracturing |
| CN106837197A (en) * | 2017-03-09 | 2017-06-13 | 长江大学 | A kind of anti-disabling device of the anti-brake tool of flexible strand |
| CN106837197B (en) * | 2017-03-09 | 2019-03-08 | 长江大学 | A kind of anti-disabling device of the anti-brake tool of flexible strand |
| CN109779537A (en) * | 2019-01-23 | 2019-05-21 | 中国海洋石油集团有限公司 | A kind of safety joint |
| CN115126743A (en) * | 2022-07-06 | 2022-09-30 | 莱州亚通重型装备有限公司 | Built-in hexagonal anti-rotation mechanism oil cylinder with position feedback for coal mine |
| CN115126743B (en) * | 2022-07-06 | 2023-03-24 | 莱州亚通重型装备有限公司 | Built-in hexagonal anti-rotation mechanism oil cylinder with position feedback for coal mine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201554386U (en) | Safety joint | |
| CN201486515U (en) | Switch type releasing packer | |
| CN205605160U (en) | Formula of breaking tail pipe blanking plug | |
| CN203175422U (en) | Quick airtight casing thread connector | |
| CN107701138B (en) | A kind of smart well pipeline cutting tool | |
| CN204139992U (en) | A kind of gas well at HTHP hermetic seal threaded connection structure of petroleum casing pipe | |
| CN201212360Y (en) | Ring-releasing safety joint | |
| CN107461174A (en) | A kind of storm valve | |
| CN101793127A (en) | Anti-tripping reverse buckling device | |
| CN106437545A (en) | Special water insulation guide tube screwed joint for ocean drilling and exploitation | |
| CN201865594U (en) | Stress reducing drill pipe connector with high torsion resistance | |
| CN201802321U (en) | Safe joint for testing tubular column tail tube | |
| CN209483269U (en) | A kind of downhole-choke release tool | |
| CN103573204A (en) | Fallen steel wire fisher passing through tapered string | |
| CN203499583U (en) | Non-rotation connector used for connecting continuous pipe and underground tool | |
| CN109519137A (en) | A kind of downhole-choke release tool | |
| CN208280916U (en) | A kind of straight-connecting sleeve pipe | |
| CN206928907U (en) | A kind of fluid power reamer blade position-limit mechanism | |
| CN202391351U (en) | Waterproof sleeve connecting device | |
| CN209262483U (en) | Underwater single hole Quick hot-plugging connector | |
| CN111271480A (en) | Underwater chemical agent injection valve | |
| CN215108797U (en) | Safe type screw rod drilling tool | |
| CN2591228Y (en) | Falling proof blowout preventing box | |
| CN203614051U (en) | Big-pitch casing thread joint | |
| CN215169809U (en) | Sealing rubber cylinder protection device of petroleum and natural gas drilling top drive rotary casing running equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: TIANJIN DAGANG OIL FIELD DRILLING TECHNOLOGY DEVEL Effective date: 20120702 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20120702 Address after: Three Dagang oil field, Tianjin, Grand Port, No. 300280 Co-patentee after: Tianjin Dagang Oilfield Drilling Technology Development Co., Ltd. Patentee after: Dagang Oil Field Group Co., Ltd. Address before: Three Dagang oil field, Tianjin, Grand Port, No. 300280 Patentee before: Dagang Oil Field Group Co., Ltd. |
|
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Three Dagang oil field, Tianjin, Grand Port, No. 300280 Patentee after: Dagang Oil Field Group Co., Ltd. Patentee after: DRILLING TECHNOLOGY DEVELOPMENT COMPANY, TIANJIN DAGANG OILFIELD RESEARCH INSTITUTE OF PETROLEUM ENGINEERING Address before: Three Dagang oil field, Tianjin, Grand Port, No. 300280 Patentee before: Dagang Oil Field Group Co., Ltd. Patentee before: Tianjin Dagang Oilfield Drilling Technology Development Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20100818 |
|
| CX01 | Expiry of patent term |