CN109162651A - A kind of hydraulic safety connector - Google Patents
A kind of hydraulic safety connector Download PDFInfo
- Publication number
- CN109162651A CN109162651A CN201811107914.2A CN201811107914A CN109162651A CN 109162651 A CN109162651 A CN 109162651A CN 201811107914 A CN201811107914 A CN 201811107914A CN 109162651 A CN109162651 A CN 109162651A
- Authority
- CN
- China
- Prior art keywords
- groove
- boss
- cavity
- joint body
- ring recess
- 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.)
- Granted
Links
- 238000007789 sealing Methods 0.000 claims abstract description 27
- 239000003921 oil Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/021—Devices for subsurface connecting or disconnecting by rotation
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/06—Releasing-joints, e.g. safety joints
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The present invention provides a kind of hydraulic safety connectors, including upper joint body and lower joint body, upper joint body bottom is equipped with stepped the first groove and the second groove from top to bottom, first boss and second boss are correspondingly provided with the first groove and the second groove at the top of lower joint body, second groove and second boss match, it is connected between first groove and first boss by sealing piston, first groove cavities are separated into upper air chamber and lower air chamber or more two parts by sealing piston, first bottom portion of groove is equipped with groove boss, groove boss protrudes into the lower contact cavity at first boss center, groove boss center is equipped with top connection cavity, top connection cavity is connected to lower contact cavity, first recess sidewall is equipped with rupture disk mounting hole, rupture disk mounting hole is connected to upper air chamber, rupture disk is mounted in rupture disk mounting hole.The configuration of the present invention is simple, easy to use, application field is extensive.
Description
Technical field
The invention belongs to oil/gas well workover treatment fields, more particularly, to a kind of hydraulic safety connector.
Background technique
In oil-gas exploration and development, downhole safety is the matter of utmost importance for needing to consider in wellbore operations.Safety joint is as a kind of
The auxiliary tool for handling down-hole accident can effectively control the complexity of down-hole accident, shorten down-hole accident process cycle, drop
Low causality loss.The tool is typically connected to the more complex position of running string, when needing, can take off tubing string from safety joint place
It opens, creates good condition for subsequent accident treatment.
Currently, there are mainly three types of reported safety joints: 1. back-buckling type safety joint, this kind of safety joint are mainly led to
The reverse rotation lifted from the top and puted down with tubing string for crossing wellhead column is completed and the disengagement of downhole tool；2. shear pin formula safety joint, should
Well head pitching is generally taken in kind safety joint, and cutting pin is suppressed in tubing string, realizes the disengagement with downhole tool；3. electric-controlled type is pacified
Full connector, this kind of safety joint control electric circuit in well by well head, provide power by down-hole battery and realize and downhole tool
It disengages.Three of the above safety joint has some limitations.Such as back-buckling type safety joint is needed through movable tubing string
The problem of mode is disengaged, this kind disengages mode, and that there is safeties is poor, success rate bottom is turned round when casing programme is more complex
Square transmitting, which has some setbacks, easily causes tubing string because torque is excessive, some position more than safety joint disconnects, and losing safety joint makes
Primitive meaning.Shear pin formula safety joint is needed from well head pitching, when tubular column structure is more complex, safety joint upper part pipe
When column internal diameter is smaller, this kind of safety joint cannot be applied.Electric-controlled type safety joint is limited by electronic product self-temperature, makes it
It may not apply to high temperature well, and the problems such as its structure is complicated, and stability is relatively poor, limit its application.In order to overcome with
Upper safety joint, it is simple to propose a kind of structure, easy to use, the extensive safety joint knot of application field
Structure.
Summary of the invention
In view of this, the present invention is directed to propose a kind of hydraulic safety connector, to solve the above problems.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of hydraulic safety connector, including upper joint body and lower joint body, upper joint body bottom are equipped with from top to bottom in rank
The first groove and the second groove of scalariform, be correspondingly provided with the first groove and the second groove at the top of lower joint body first boss and
Second boss, the second groove and second boss match, and are connected between the first groove and first boss by sealing piston, sealing
First groove cavities are separated into upper air chamber and lower air chamber or more two parts by piston, and it is convex that the first bottom portion of groove is equipped with groove
Platform, groove boss protrude into the lower contact cavity at first boss center, and groove boss center is equipped with top connection cavity, and top connection is empty
Chamber is connected to lower contact cavity, and the first recess sidewall is equipped with rupture disk mounting hole, and rupture disk mounting hole is connected to upper air chamber,
Rupture disk is mounted in rupture disk mounting hole.
Further, the sealing piston top is equipped with several piston holes, corresponding with piston hole in first boss
Equipped with several blind holes, several fixation holes are correspondingly provided in the first recess sidewall with piston hole, cuts off and sequentially passes through fixation hole, work
Through-hole and blind hole are filled in, so that upper joint body, sealing piston be connected with lower joint body；It cuts off outside and is equipped with plug, plug is located at
In fixation hole, plug plays the role of protection and sealing is cut off.
Further, second groove is interior hexagonal structure, and the second boss corresponds to outer hexagonal structure；Have
It is connected firmly conducive to upper joint body and lower joint body.
Further, third groove, the first boss and the are equipped between first groove and the second groove
Corresponding and matching is equipped with third boss between two boss, and third groove is sleeved on third boss；Be conducive to upper joint body under
Fitting body is further connected firmly.
Further, guard space is equipped between the second recess sidewall top and second boss bottom end；It prevents
Between fitting body and lower joint body.
Further, the top connection top is equipped with upper tubing thread, and upper tubing thread cavity is connected to top connection cavity, under
Fitting body lower part is equipped with lower tubing thread, and lower tubing thread cavity is connected to lower contact cavity；Upper tubing thread and lower tubing thread it is convenient with
Oil-piping connection.
Further, adapter cavity section, lower tubing thread are connected between the upper tubing thread cavity and top connection cavity
Lower adapter cavity section is connected between cavity and lower contact cavity, upper adapter cavity section plays fluid and above connects from the entrance of upper tubing thread cavity
Transitional function between head cavity, lower adapter cavity section play the transition that fluid enters from lower contact cavity between lower tubing thread cavity
Effect.
Further, the groove boss is equipped with the first O ring recess, is equipped with the first O in the first O ring recess and encloses；Be conducive to
Sealed connection between groove plateau sidewall and lower contact cavity.
Further, the sealing piston inner sidewall is equipped with the 2nd O ring recess, is equipped with the 2nd O in the 2nd O ring recess and encloses,
Be conducive to the sealed connection between first boss side wall and sealing piston；The sealing piston lateral wall is enclosed equipped with the 3rd O
Slot, interior the 3rd O that is equipped with of the 3rd O ring recess are enclosed, and are conducive to the sealed connection between the first recess sidewall and sealing piston.
Further, it is equipped with the 4th O ring recess in the rupture disk mounting hole, is equipped with the 4th O in the 4th O ring recess and encloses, have
Conducive to the sealing for splitting disk mounting hole；It is equipped with the 5th O ring recess in the fixation hole, is equipped with the 5th O in the 5th O ring recess and encloses, favorably
In sealing will be cut off.
Compared with the existing technology, a kind of hydraulic safety connector of the present invention has the advantage that
(1) structure is simple, and working service is convenient；
(2) scene uses easy to operate, operates without movable tubing string and pitching, it is only necessary to which well head, which is suppressed, can be completed safe connect
The disconnection of head and downhole tool；
(3) a possibility that down-hole accident is secondary complicated caused by reducing because of movable tubing string or pitching operation, improves underground
Capability in handling accident；
(4) adaptability is extensive, and the structure of this covering device almost can be applied to existing tubing string operation.
Detailed description of the invention
The attached drawing for constituting a part of the invention is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is hydraulic safety connector the schematic diagram of the section structure described in the embodiment of the present invention；
Fig. 2 is upper joint body the schematic diagram of the section structure described in the embodiment of the present invention；
Fig. 3 is lower joint body the schematic diagram of the section structure described in the embodiment of the present invention；
Fig. 4 is the face A-A structural schematic diagram described in the embodiment of the present invention.
Description of symbols:
10- upper joint body；The first groove of 11-；The second groove of 12-；13- third groove；14- groove boss；The upper air of 15-
Chamber；Air chamber under 16-；17- rupture disk；18- fixation hole；20- lower joint body；21- first boss；22- second boss；23-
Three boss；24- blind hole；30- sealing piston；40- is cut off；50- top connection cavity；The upper tubing thread of 51-；The upper adapter cavity section of 52-；
60- lower contact cavity；Tubing thread under 61-；Adapter cavity section under 62-；The first O ring recess of 70-；The 2nd O ring recess of 71-；The 3rd O of 72- circle
Slot；The 4th O ring recess of 73-；The 5th O ring recess of 74-；80- guard space.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark
Show that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as pair
Limitation of the invention.In addition, term " first ", " second " etc. are used for description purposes only, it is not understood to indicate or imply phase
To importance or implicitly indicate the quantity of indicated technical characteristic.The feature for defining " first ", " second " etc. as a result, can
To explicitly or implicitly include one or more of the features.In the description of the present invention, unless otherwise indicated, " multiple "
It is meant that two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood by concrete condition
Concrete meaning in the present invention.
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
As Figure 1-Figure 4, the present invention relates to a kind of hydraulic safety connector, including upper joint body 10 and lower joint body 20,
10 bottom of upper joint body is equipped with stepped the first groove 11 and the second groove 12 from top to bottom, 20 top of lower joint body with
First groove 11 and the second groove 12 are correspondingly provided with first boss 21 and second boss 22,22 phase of the second groove 12 and second boss
Cooperation is connected between the first groove 11 and first boss 21 by sealing piston 30, and sealing piston 30 is by 11 cavity of the first groove
About 16 two parts of air chamber 15 and lower air chamber are separated into, 11 bottom of the first groove is equipped with groove boss 14, groove boss
14 protrude into the lower contact cavity 60 at 21 center of first boss, and 14 center of groove boss is equipped with top connection cavity 50, and top connection is empty
Chamber 50 is connected to lower contact cavity 60,11 side wall of the first groove be equipped with 17 mounting hole of rupture disk, 17 mounting hole of rupture disk with it is upper
Air chamber 15 is connected to, and rupture disk 17 is mounted in 17 mounting hole of rupture disk.
30 top of sealing piston is equipped with several piston holes, if being correspondingly provided in first boss 21 with piston hole
Dry blind hole 24 is correspondingly provided with several fixation holes 18 with piston hole on first groove, 11 side wall, cuts off 40 and sequentially pass through fixation hole
18, piston hole and blind hole 24, so that upper joint body 10, sealing piston 30 and lower joint body 20 be connected；40 outsides are cut off to set
There is plug, plug is located in fixation hole 18.
Second groove 12 is interior hexagonal structure, and the second boss 22 corresponds to outer hexagonal structure.
Third groove 13, the first boss 21 and second are equipped between first groove 11 and the second groove 12
Corresponding and matching is equipped with third boss 23 between boss 22, and third groove 13 is sleeved on third boss 23.
Guard space 80 is equipped between second groove, the 12 side wall top and 22 bottom end of second boss.
The top connection top is equipped with upper tubing thread 51, and upper 51 cavity of tubing thread is connected to top connection cavity 50, under connect
Head 20 lower part of body is equipped with lower tubing thread 61, and lower 61 cavity of tubing thread is connected to lower contact cavity 60.
Adapter cavity section 52 is connected between 51 cavity of upper tubing thread and top connection cavity 50, lower tubing thread 61 is empty
Lower adapter cavity section 62 is connected between chamber and lower contact cavity 60.
The groove boss 14 is equipped with the first O ring recess 70, is equipped with the first O in the first O ring recess 70 and encloses.
30 inner sidewall of sealing piston is equipped with the 2nd O ring recess 71, is equipped with the 2nd O in the 2nd O ring recess 71 and encloses, described
30 lateral wall of sealing piston be equipped with the 3rd O ring recess 72, be equipped with the 3rd O in the 3rd O ring recess 72 and enclose.
It is equipped with the 4th O ring recess 73 in 17 mounting hole of rupture disk, is equipped with the 4th O in the 4th O ring recess 73 and encloses, it is described
It is equipped with the 5th O ring recess 74 in fixation hole 18, is equipped with the 5th O in the 5th O ring recess 74 and encloses.
The course of work of the invention are as follows: present apparatus upper joint body 10, lower joint body 20 and piston are connected by cutting off 40
One installs rupture disk 17, cuts off 40 and the assembling of the present apparatus can be completed in plug；At this point, in safety joint is centrally formed
Portion's fluid channel forms the upper air chamber 15 and lower air chamber 16 of sealing between upper joint body 10, lower joint body 20 and piston；
The safety joint G.I.H is by cutting off 40 receiving lower part tubing string weight, inside and outside upper joint body 10 and lower joint body 20
Torque needed for the structure cooperation transmitting tubing string operation of six sides；When encountering special circumstances, need to disengage with safety joint lower part tubing string
When, it is only necessary to it is suppressed outside upper joint body 10 by well head annular space, rupture disk 17 is opened, and borehole fluid enters upper air chamber 15,
Pressure increase in upper air chamber 15, by the pressure difference of upper air chamber 15 and lower air chamber 16, cutting off 40 be can be completed
The disengagement of fitting body 10 and downhole tool.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of hydraulic safety connector, it is characterised in that: including upper joint body (10) and lower joint body (20), upper joint body (10)
Bottom is equipped with stepped the first groove (11) and the second groove (12) from top to bottom, be equipped at the top of lower joint body (20) with
First groove (11) and the corresponding first boss (21) of the second groove (12) and second boss (22), the second groove (12) and second
Boss (22) matches, and is connected between the first groove (11) and first boss (21) by sealing piston (30), sealing piston
(30) the first groove (11) cavity is separated into upper air chamber (15) and lower air chamber (16) two parts up and down, the first groove (11)
Bottom is equipped with groove boss (14), and groove boss (14) protrudes into the lower contact cavity (60) at first boss (21) center, groove
Boss (14) center is equipped with top connection cavity (50), and top connection cavity (50) is connected to lower contact cavity (60), the first groove
(11) side wall is equipped with rupture disk (17) mounting hole, and rupture disk (17) mounting hole is connected to upper air chamber (15), rupture disk (17)
It is mounted in rupture disk (17) mounting hole.
2. a kind of hydraulic safety connector according to claim 1, it is characterised in that: described sealing piston (30) top is set
There are several piston holes, is correspondingly provided with several blind holes (24) in first boss (21) with piston hole, the first groove (11) side wall
Upper and piston hole is correspondingly provided with several fixation holes (18), cuts off (40) and sequentially passes through fixation hole (18), piston hole and blind hole
(24), so that upper joint body (10), sealing piston (30) and lower joint body (20) be connected；It cuts off and is equipped with plug on the outside of (40),
Plug is located in fixation hole (18).
3. a kind of hydraulic safety connector according to claim 1 or 2, it is characterised in that: second groove (12) is
Interior hexagonal structure, the second boss (22) correspond to outer hexagonal structure.
4. a kind of hydraulic safety connector according to claim 1, it is characterised in that: first groove (11) and second
Third groove (13) are equipped between groove (12), corresponding between the first boss (21) and second boss (22) and matching is set
Have third boss (23), third groove (13) is sleeved on third boss (23).
5. a kind of hydraulic safety connector according to claim 1, it is characterised in that: the second further, described groove
(12) guard space (80) are equipped between side wall top and second boss (22) bottom end.
6. a kind of hydraulic safety connector according to claim 1, it is characterised in that: the top connection top is equipped with and oils
Pipe thread (51), upper tubing thread (51) cavity are connected to top connection cavity (50), and lower joint body (20) lower part is equipped with lower tubing thread
(61), lower tubing thread (61) cavity is connected to lower contact cavity (60).
7. a kind of hydraulic safety connector according to claim 6, it is characterised in that: upper tubing thread (51) cavity and
It is connected between top connection cavity (50) adapter cavity section (52), connects between lower tubing thread (61) cavity and lower contact cavity (60)
It is connected to lower adapter cavity section (62).
8. a kind of hydraulic safety connector according to claim 1, it is characterised in that: the groove boss (14) is equipped with
First O ring recess (70), interior the first O that is equipped with of the first O ring recess (70) are enclosed.
9. a kind of hydraulic safety connector according to claim 1, it is characterised in that: described sealing piston (30) inner sidewall
It is equipped with the 2nd O ring recess (71), the 2nd O is equipped in the 2nd O ring recess (71) and encloses, the sealing piston (30) lateral wall is equipped with
3rd O ring recess (72), interior the 3rd O that is equipped with of the 3rd O ring recess (72) are enclosed.
10. a kind of hydraulic safety connector according to claim 1, it is characterised in that: described rupture disk (17) mounting hole
It is inside equipped with the 4th O ring recess (73), the 4th O is equipped in the 4th O ring recess (73) and encloses, the 5th O is equipped in the fixation hole (18) and is enclosed
Slot (74), interior the 5th O that is equipped with of the 5th O ring recess (74) are enclosed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811107914.2A CN109162651B (en) | 2018-09-21 | 2018-09-21 | Hydraulic safety joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811107914.2A CN109162651B (en) | 2018-09-21 | 2018-09-21 | Hydraulic safety joint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109162651A true CN109162651A (en) | 2019-01-08 |
| CN109162651B CN109162651B (en) | 2020-06-05 |
Family
ID=64880223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811107914.2A Active CN109162651B (en) | 2018-09-21 | 2018-09-21 | Hydraulic safety joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109162651B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110593777A (en) * | 2019-10-08 | 2019-12-20 | 西南石油大学 | Double-gradient drilling string disconnecting and tieback device without marine riser |
| CN111894478A (en) * | 2020-07-09 | 2020-11-06 | 宝鸡畅油石油设备有限公司 | RD type safety joint |
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| CN201056994Y (en) * | 2007-02-06 | 2008-05-07 | 大港油田集团有限责任公司 | Hydraulic inverse-buckling safety joint |
| CN201273150Y (en) * | 2008-09-25 | 2009-07-15 | 西部钻探克拉玛依钻井工艺研究院 | Hydraulic releasing tool for well completion |
| CN201428395Y (en) * | 2009-06-13 | 2010-03-24 | 中国石油集团西部钻探工程有限公司克拉玛依钻井工艺研究院 | Ball-injection-free pressure building joint |
| CN105370230A (en) * | 2015-12-14 | 2016-03-02 | 天津汇铸石油设备科技有限公司 | Releasing tool |
| CN205330562U (en) * | 2016-01-12 | 2016-06-22 | 中国石油化工股份有限公司 | Layering gas injection safety joint |
| US20170081927A1 (en) * | 2015-09-22 | 2017-03-23 | Odfjell Well Services Norway As | Relockable shearing swivel tool apparatus and method |
| CN206267805U (en) * | 2016-12-15 | 2017-06-20 | 濮阳市东昊机械电子有限公司 | New H-type Safe Joints |
| CN206617100U (en) * | 2017-03-01 | 2017-11-07 | 中国石油天然气股份有限公司 | Safety joint |
| CN107558933A (en) * | 2017-09-15 | 2018-01-09 | 刘玉友 | Safety joint under a kind of fluffing of moulding sand formula oil well |
| CN108301788A (en) * | 2018-02-07 | 2018-07-20 | 中国石油集团西部钻探工程有限公司 | Floating coupling device |
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2018
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2278945C2 (en) * | 2004-07-20 | 2006-06-27 | Саркисов Николай Михайлович | Down-hole releasing device |
| CN201056994Y (en) * | 2007-02-06 | 2008-05-07 | 大港油田集团有限责任公司 | Hydraulic inverse-buckling safety joint |
| CN201273150Y (en) * | 2008-09-25 | 2009-07-15 | 西部钻探克拉玛依钻井工艺研究院 | Hydraulic releasing tool for well completion |
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| CN205330562U (en) * | 2016-01-12 | 2016-06-22 | 中国石油化工股份有限公司 | Layering gas injection safety joint |
| CN206267805U (en) * | 2016-12-15 | 2017-06-20 | 濮阳市东昊机械电子有限公司 | New H-type Safe Joints |
| CN206617100U (en) * | 2017-03-01 | 2017-11-07 | 中国石油天然气股份有限公司 | Safety joint |
| CN107558933A (en) * | 2017-09-15 | 2018-01-09 | 刘玉友 | Safety joint under a kind of fluffing of moulding sand formula oil well |
| CN108301788A (en) * | 2018-02-07 | 2018-07-20 | 中国石油集团西部钻探工程有限公司 | Floating coupling device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110593777A (en) * | 2019-10-08 | 2019-12-20 | 西南石油大学 | Double-gradient drilling string disconnecting and tieback device without marine riser |
| CN111894478A (en) * | 2020-07-09 | 2020-11-06 | 宝鸡畅油石油设备有限公司 | RD type safety joint |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109162651B (en) | 2020-06-05 |
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Effective date of registration: 20210707 Address after: 300457 Tianjin Binhai New Area Development Zone Second Avenue 83, China Petroleum Tianjin building Bohai Drilling Engineering Co., Ltd. Patentee after: CNPC Bohai Drilling Engineering Co.,Ltd. Patentee after: CHINA NATIONAL PETROLEUM Corp. Address before: No.83, 2nd Street, Binhai New Area Economic and Technological Development Zone, Tianjin 300457 Patentee before: CNPC Bohai Drilling Engineering Co.,Ltd. |