CN106837238A - A kind of self-locking plug - Google Patents
A kind of self-locking plug Download PDFInfo
- Publication number
- CN106837238A CN106837238A CN201611189663.8A CN201611189663A CN106837238A CN 106837238 A CN106837238 A CN 106837238A CN 201611189663 A CN201611189663 A CN 201611189663A CN 106837238 A CN106837238 A CN 106837238A
- Authority
- CN
- China
- Prior art keywords
- self
- locking
- plug
- short circuit
- locking mechanism
- 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
- 208000034656 Contusions Diseases 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 abstract description 3
- 239000002343 natural gas well Substances 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 description 7
- 239000004568 cement Substances 0.000 description 6
- 238000010276 construction Methods 0.000 description 3
- 238000007790 scraping Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000002045 lasting effect 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Prostheses (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
Abstract
The present invention relates to cementing tool in oil, natural gas well cementing process, a kind of self-locking plug, including plug, bruising short circuit, self-locking mechanism are specifically provided, described plug includes mandrel and self-locking head, mandrel one self-locking head of anterior connection, it is characterised in that：Described plug also includes the rubber bodies being sheathed on mandrel outer wall, self-locking head front portion is sequentially provided with draw-in groove and O-ring from front to back, baffle ring is provided with outside draw-in groove, described self-locking head is connected with self-locking mechanism self-locking, self-locking mechanism is connected to inside bruising short circuit, solve the technical problem that plug is stayed in well cementation, it is ensured that well cementation is not stayed and fills up sufficient later stage job requirements.
Description
Technical field
The invention belongs to cementing tool field in oil, natural gas well cementing process, and in particular to a kind of self-locking plug.
Background technology
Current existing plug is mainly the scraping of casing inner diameter cement and the cementing requirements such as satisfaction.Now with low-permeability oil
The lasting propulsion of gas development of resources, Gu being combined with later stage underground work many in Completion Operations, for various considerations, casing string is more next
It is more complicated, how both can guarantee that scraping sleeve pipe was also avoided that and stayed cement plug.For case above, domestic and international project personnel be also carried out
The improvement of plug structure, all realizes self-locking by C rings mostly, and Reliability comparotive is poor, often stays cement plug, and the influence later stage is made
Industry.
The content of the invention
It is an object of the invention to provide a kind of self-locking plug, ensure that well cementation is not stayed and fill up sufficient later stage job requirements.
Therefore, the invention provides a kind of self-locking plug, including plug, bruising short circuit, self-locking mechanism, described plug
Including mandrel and self-locking head, mandrel one self-locking head of anterior connection, described plug also includes the rubber being sheathed on mandrel outer wall
Colloid, self-locking head front portion is sequentially provided with draw-in groove and O-ring from front to back, is provided with baffle ring outside draw-in groove, described self-locking head with from
Latch mechanism self-locking is connected, and self-locking mechanism is connected to inside bruising short circuit.
Described self-locking mechanism includes that shell, housing top inner side are sequentially connected top cap, spring, self-locking block from top to bottom,
Through outer shell bottom wall and self-locking head self-locking, the left side wall of shell is provided with tightens jack to self-locking block.
O-ring is provided between described bruising short circuit and self-locking mechanism roof front end.
Described self-locking mechanism is threadedly attached in inside bruising short circuit, self-locking mechanism is short with short pressure by tightening jack
Connect in succession, self-locking mechanism passes through screw thread and tightens the inside that jack is connected to short pressure short circuit.
Described baffle ring is located at the outside of draw-in groove horizontal middle spindle.
The quantity of described baffle ring is 1, and the quantity for tightening jack is 4.
Beneficial effects of the present invention：This self-locking plug that the present invention is provided, including plug, bruising short circuit, from lock machine
Structure, described plug includes mandrel and self-locking head, and mandrel one self-locking head of anterior connection, described plug also includes being sheathed on core
Rubber bodies on axle outer wall, self-locking head front portion is sequentially provided with draw-in groove and O-ring from front to back, and baffle ring is provided with outside draw-in groove, described
Self-locking head be connected with self-locking mechanism self-locking, self-locking mechanism is connected to inside bruising short circuit, and the self-locking plug realizes plug
With the self-locking of bruising short circuit, and the rotation of plug and self-locking mechanism is prevented, it is to avoid stay cement plug, improve the efficiency for boring plug.
Brief description of the drawings
The present invention is described in further details below with reference to accompanying drawing.
Fig. 1 is combined type plug schematic diagram.
Fig. 2 is baffle ring position front view.
Fig. 3 is baffle ring position right view.
Fig. 4 is plug structural front view.
Fig. 5 is bruising short circuit and self-locking mechanism structural front view.
Description of reference numerals：1st, rubber bodies, 2, mandrel, 3, self-locking head, 4, O-ring, 5, draw-in groove, 6, baffle ring, 7, tighten it is slotting
Hole, 8, top cap, 9, spring, 10, self-locking block, 11, O-ring, 12, self-locking mechanism, 13, bruising short circuit, 14, plug, 15, shell,
16th, external screw thread, 17, internal thread.
Specific embodiment
Embodiment 1：
As Figure 1-3, a kind of self-locking plug, including plug 14, bruising short circuit 13, self-locking mechanism 12, described glue
Plug 14 includes mandrel 2 and self-locking head 3, and one self-locking head 3 of anterior connection of mandrel 2, described plug 14 also includes being sheathed on mandrel 2
Rubber bodies 1 on outer wall, the front portion of self-locking head 3 is sequentially provided with draw-in groove 5 and O-ring 4 from front to back, and baffle ring 6 is provided with outside draw-in groove 5,
Described self-locking head 3 is connected with the self-locking of self-locking mechanism 12, and self-locking mechanism 12 is connected to inside bruising short circuit 13；Described baffle ring 6
Positioned at the outside of the horizontal middle spindle of draw-in groove 5, the quantity of baffle ring 6 is 1.
Wherein rubber bodies 1 are installed on plug top, with certain bearing capacity, when plug runs, meet in sleeve pipe
Footpath cement scraping and cementing requirements；Draw-in groove 5 and baffle ring 6 coordinate achievable plug to lock in certainly with the self-locking mechanism 12 of bruising short circuit 13
On float collar, satisfaction avoids staying cement plug requirement；O-ring 4 realizes sealing, and baffle ring 6 avoids the rotation of plug and self-locking mechanism, carries
Height bores plug efficiency.
Embodiment 2：
As illustrated in figures 4-5, on the basis of embodiment 1, described self-locking mechanism 12 is included in shell 15, the roof of shell 15
Side is sequentially connected top cap 8, spring 9, self-locking block 10 from top to bottom, and self-locking block 10 passes through the bottom wall of shell 15 and the self-locking of self-locking head 3, outward
The left side wall of shell 15 is provided with tightens jack 7.
Plug is descending under liquid-driving, and self-locking block 10 realizes the self-locking with self-locking head 3, by the O-ring 4 of self-locking head 3
Sealing is realized, the reliability of sealing is substantially increased.
Embodiment 3：
As illustrated in figures 4-5, on the basis of embodiment 1-2, described bruising short circuit 13 and the roof front end of self-locking mechanism 12
Between be provided with O-ring 11.O-ring 11 realizes the sealing of bruising short circuit 13 and self-locking mechanism 12, and improve sealing well can
By property.
Embodiment 4：
As shown in Fig. 1,4,5, on the basis of embodiment 1-3, described self-locking mechanism 12 is threadedly attached in bruising
Inside short circuit 13, by tightening, jack 7 is connected self-locking mechanism 12 with short pressure short circuit 13, self-locking mechanism 12 passes through screw thread and tightens
Jack 7 is connected to the inside of short pressure short circuit 13, and the quantity for tightening jack 7 is 4.Threaded connection is simple and convenient, improves work effect
Rate, can make self-locking mechanism 12 be connected even closer with short pressure short circuit 13 by tightening jack 7, improve steadiness, screw thread and self-locking
Mechanism is connected ensures that connection is more consolidated and efficient.
Concrete operation method is as follows：
(1) each accessory is processed according to accompanying drawing requirement, combination plug is connected by thread forms；
(2) specified to shaft bottom under connecting bruising short circuit, float collar, float shoe, sleeve pipe, downhole tool simultaneously according to tubing string connection request
Position；
(3) after well cementation starts to replace operation, by plug from well head input bunch tube, start to replace construction, plug is in liquid
Body is descending under promoting, and self-locking block 10 realizes the self-locking with self-locking head 3, and sealing is realized by the O-ring 4 of self-locking head 3,
(4) replace and finish, self-locking is realized in plug part with float collar special construction (self-locking mechanism 12 in bruising short circuit 13).
Operation principle of the invention is as follows：
After well cementation starts to replace operation, by plug 14 from well head input bunch tube, start to replace construction, plug 14 is in liquid
Body is descending under promoting, and self-locking head 3 enters in self-locking mechanism 12, and it is continued traveling downwardly liquid-driving, the now extruding of self-locking head 3 self-locking block
10, self-locking block 10 enters in draw-in groove 5 in the presence of spring 9, the self-locking of plug 14 and self-locking mechanism 12 is realized, by self-locking head
3 O-ring 4 realizes the sealing of plug 14 and self-locking mechanism 12, and baffle ring 6 avoids the rotation of plug 14 and self-locking mechanism 12.
It is exemplified as above be only to of the invention for example, do not constitute the limitation to protection scope of the present invention, it is all
It is that design same or analogous with the present invention is belonged within protection scope of the present invention.
Claims (6)
1. a kind of self-locking plug, including plug (14), bruising short circuit (13), self-locking mechanism (12), described plug (14) bag
Include mandrel (2) and self-locking head (3), mandrel (2) one self-locking head (3) of anterior connection, it is characterised in that：Described plug (14) is also
Including the rubber bodies (1) being sheathed on mandrel (2) outer wall, self-locking head (3) front portion is sequentially provided with draw-in groove (5) and O-shaped from front to back
Baffle ring (6) is provided with outside circle (4), draw-in groove (5), described self-locking head (3) is connected with self-locking mechanism (12) self-locking, self-locking mechanism
(12) it is connected to bruising short circuit (13) internal.
2. self-locking plug as claimed in claim 1, it is characterised in that：Described self-locking mechanism (12) including shell (15),
Shell (15) roof inner side is sequentially connected top cap (8), spring (9), self-locking block (10) from top to bottom, and self-locking block (10) is through shell
(15) bottom wall and self-locking head (3) self-locking, the left side wall of shell (15) is provided with tightens jack (7).
3. self-locking plug as claimed in claim 1, it is characterised in that：Described bruising short circuit (13) and self-locking mechanism (12)
O-ring (11) is provided between roof front end.
4. self-locking plug as claimed in claim 2, it is characterised in that：Described bruising short circuit (13) external screw thread (16) with it is floating
Hoop is connected, and internal thread (17) is connected with sleeve pipe, and self-locking mechanism (12) is threadedly attached in inside bruising short circuit (13), from lock machine
Structure (12) is connected by tightening jack (7) with short pressure short circuit (13), self-locking mechanism (12) is by screw thread and tightens jack (7) even
It is connected to the inside of short pressure short circuit (13).
5. self-locking plug as claimed in claim 1, it is characterised in that：Described baffle ring (6) is positioned at draw-in groove (5) horizontal centre
The outside of axle.
6. the self-locking plug as described in any one in claim 4-5, it is characterised in that：The quantity of described baffle ring (6)
It it is 1, the quantity for tightening jack (7) is 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611189663.8A CN106837238B (en) | 2016-12-21 | 2016-12-21 | A kind of self-locking rubber plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611189663.8A CN106837238B (en) | 2016-12-21 | 2016-12-21 | A kind of self-locking rubber plug |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106837238A true CN106837238A (en) | 2017-06-13 |
| CN106837238B CN106837238B (en) | 2019-05-07 |
Family
ID=59139691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611189663.8A Active CN106837238B (en) | 2016-12-21 | 2016-12-21 | A kind of self-locking rubber plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106837238B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111779462A (en) * | 2020-08-02 | 2020-10-16 | 濮阳中原三力创高机械设备有限公司 | Floating hoop and rubber plug interlocking device and application method |
| CN113090224A (en) * | 2019-12-23 | 2021-07-09 | 中国石油天然气股份有限公司 | Guide shoe for well cementation and expansion suspension well cementation tubular column |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2143260Y (en) * | 1992-11-05 | 1993-10-06 | 徐田 | Rubber spigot structure for casing of oil well |
| WO2004051049A2 (en) * | 2002-12-03 | 2004-06-17 | Mikolajczyk Raymond F | Non-rotating cement wiper plugs |
| CN2923992Y (en) * | 2006-06-29 | 2007-07-18 | 克拉玛依市金鑫科技有限公司 | Self-locking rubber cork |
| CN201050335Y (en) * | 2007-02-13 | 2008-04-23 | 新疆石油管理局钻井工艺研究院 | Self-locking rubber plug combination for well cementing and completion |
| CN201738871U (en) * | 2010-06-17 | 2011-02-09 | 中国石油集团川庆钻探工程有限公司井下作业公司 | Anti-rotating well cementation rubber stopper with self-locking mechanism |
| CN101979821A (en) * | 2010-11-13 | 2011-02-23 | 中国石油集团西部钻探工程有限公司 | Self-locking cementing stopper combination device |
| CN102071905A (en) * | 2011-02-18 | 2011-05-25 | 中国石油集团川庆钻探工程有限公司井下作业公司 | Anti-rotation self-locking rubber plug used for well cementation |
| CN202249930U (en) * | 2011-10-18 | 2012-05-30 | 中国石油化工股份有限公司 | Self-locking rubber plug |
-
2016
- 2016-12-21 CN CN201611189663.8A patent/CN106837238B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2143260Y (en) * | 1992-11-05 | 1993-10-06 | 徐田 | Rubber spigot structure for casing of oil well |
| WO2004051049A2 (en) * | 2002-12-03 | 2004-06-17 | Mikolajczyk Raymond F | Non-rotating cement wiper plugs |
| CN2923992Y (en) * | 2006-06-29 | 2007-07-18 | 克拉玛依市金鑫科技有限公司 | Self-locking rubber cork |
| CN201050335Y (en) * | 2007-02-13 | 2008-04-23 | 新疆石油管理局钻井工艺研究院 | Self-locking rubber plug combination for well cementing and completion |
| CN201738871U (en) * | 2010-06-17 | 2011-02-09 | 中国石油集团川庆钻探工程有限公司井下作业公司 | Anti-rotating well cementation rubber stopper with self-locking mechanism |
| CN101979821A (en) * | 2010-11-13 | 2011-02-23 | 中国石油集团西部钻探工程有限公司 | Self-locking cementing stopper combination device |
| CN102071905A (en) * | 2011-02-18 | 2011-05-25 | 中国石油集团川庆钻探工程有限公司井下作业公司 | Anti-rotation self-locking rubber plug used for well cementation |
| CN202249930U (en) * | 2011-10-18 | 2012-05-30 | 中国石油化工股份有限公司 | Self-locking rubber plug |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113090224A (en) * | 2019-12-23 | 2021-07-09 | 中国石油天然气股份有限公司 | Guide shoe for well cementation and expansion suspension well cementation tubular column |
| CN111779462A (en) * | 2020-08-02 | 2020-10-16 | 濮阳中原三力创高机械设备有限公司 | Floating hoop and rubber plug interlocking device and application method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106837238B (en) | 2019-05-07 |
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