CN205000937U - Coiled tubing blanking plug - Google Patents
Coiled tubing blanking plug Download PDFInfo
- Publication number
- CN205000937U CN205000937U CN201520633433.0U CN201520633433U CN205000937U CN 205000937 U CN205000937 U CN 205000937U CN 201520633433 U CN201520633433 U CN 201520633433U CN 205000937 U CN205000937 U CN 205000937U
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- piston
- coiled tubing
- screen casing
- blanking plug
- screen pipe
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Abstract
The utility model discloses a coiled tubing blanking plug, it includes from last to the lower sealed seating nipple, screen pipe, the guiding head that connect of order in proper order, is equipped with the shutoff piston at the inside cover in the upper end of screen pipe, is provided with a plurality of screen pipe inlet ports at the middle part of screen pipe, the pin is fixed to be set up in the screen pipe shutoff piston through starting, is provided with the piston catch at the lower extreme of shutoff piston, and step in the lower extreme of screen pipe is provided with the screen pipe of internal diameter grow when through pressor mode in coiled tubing, makes the shutoff piston cut the start -up shear pin to arrive the interior step department of screen pipe in the screen pipe down, through the mutual card of step in piston catch and the screen pipe, realize that shutoff piston and screen pipe lock. This coiled tubing blanking plug has cracking pressure stable, that can set for according to particular case to neither cause junk in the pit after opening, influence later stage measure operation, block up the production passageway in the time of also can not putting into production.
Description
Technical field
The utility model relates to a kind of petroleum gas field gas well liquid loading downhole tool, particularly relates to a kind of coiled tubing blanking plug.
Background technology
Under enter coiled tubing as flow string time, for avoiding downhole fluid to enter coiled tubing, bottom coiled tubing, blanking plug must be installed, and after coiled tubing is in place, by adding the mode of hydraulic pressure, start blanking plug, setting up and producing passage.At present, the coiled tubing blanking plug of on-the-spot application mainly contains two kinds: a kind of is that the blocking fuse with limited step and sealing ring is loaded coiled tubing inside, by the mode suppressed in coiled tubing, destroy blocking fuse, although this mode structure is simple, but there is opening pressure instability, the blocking fuse dropped can form trouble of lost tool in hole, impacts later stage measure operation; Another kind is that blocking fuse is contained in the screen casing with sealing surface, and the size of opening force is controlled by installing the mode starting pin, blanking plug is connected with coiled tubing by the special device that connects, although this kind of mode can not form trouble of lost tool in hole, but the blanking plug fuse fallen into bottom screen casing is not due to fixing, return on easily under the percussion of downhole fluid and again block coiled tubing, affecting gas well output.
Utility model content
Technical problem to be solved in the utility model is that the deficiency existed for above-mentioned prior art provides a kind of reliable operation, neither trouble of lost tool in hole is caused after unlatching, affecting later stage measure operation, also blocking can not produce the coiled tubing blanking plug of passage when producing.
The technical scheme that the utility model adopts is: a kind of coiled tubing blanking plug, it comprises the seal operation cylinder be linked in sequence successively from top to bottom, screen casing, seeker, shutoff piston is provided with in the upper end internal sleeve of screen casing, the middle part of screen casing is provided with multiple screen casing air inlet, described shutoff piston is fixedly installed in screen casing by starting pin, it is characterized in that: the lower end of shutoff piston is provided with piston lock ring, the lower end of screen casing is provided with step in screen casing that internal diameter becomes large, when the mode by pressurizeing in coiled tubing, shutoff piston is made to cut off startup shear pin, and go downwards to step place in the screen casing in screen casing, blocked mutually by step in piston lock ring and screen casing, realize shutoff piston and screen casing locks.
By technique scheme, the upper end of described screen casing is sleeved on outside seal operation cylinder, and the inside, lower end of described seal operation cylinder is provided with locating part.
By technique scheme, seal operation cylinder is provided with the seal bar with its seal arrangement, described seal bar is provided with position-limit mechanism and the retaining mechanism for lock sealing bar, and described position-limit mechanism is corresponding with the locating part on seal operation cylinder.
By technique scheme, described seal bar comprises the seal bar joint, piston bush, the lock-on connection that are linked in sequence successively from top to down, pressure transmission hole is provided with in described seal bar joint, outer end is provided with sealing ring, described pressure transmission hole is used for hydraulic pressure transfer to the packed-piston arranged in piston bush, the lower end of described packed-piston is fixed on lock-on connection by starting shear pin, and described position-limit mechanism is arranged on the lower end of lock-on connection, and described retaining mechanism is arranged on packed-piston.
By technique scheme, described locating part is annular boss, and described position-limit mechanism is included in the locking spring that lock-on connection lower end arranges and refers to and positioning step, and described positioning step is arranged on root lock-on connection being positioned at locking spring and referring to.
By technique scheme, be provided with step in piston bush in the lower end of piston bush, described retaining mechanism is seal bar snap, step phase configuration in described seal bar snap and piston bush.
By technique scheme, described seal operation cylinder upper end external surface is provided with roll extrusion link slot and is set with sealing ring.
By technique scheme, between described screen casing and seal operation cylinder, be also connected with check pin.
Beneficial effect acquired by the utility model is:
1, coiled tubing blanking plug has opening pressure that is stable, that can set as the case may be, and neither causes trouble of lost tool in hole after opening, and affects later stage measure operation, also blocking can not produce passage when producing.
2, seal bar can drop in coiled tubing blanking plug the effective shutoff also realized coiled tubing in well, facilitates tubing string to trip out safely.
Accompanying drawing explanation
Fig. 1 is coiled tubing plug structure schematic diagram.
Fig. 2 is seal bar structural representation.
Fig. 3 is that coiled tubing blanking plug drops into seal bar structural representation.
Accompanying drawing number is: 1, sealing ring, 2, seal operation cylinder, 3, check pin, 4, screen casing, 5, shutoff piston, 6, shutoff piston starts shear pin, 7, piston lock ring, 8, target seeker, 9, roll extrusion link slot, 10, sealing drum inner convex platform, 11, screen casing air inlet, 12, step in screen casing, 13, seal bar joint, 14, sealing ring, 15, piston bush, 16, seal bar piston, 17, seal bar snap, 18, lock-on connection, 19, seal bar piston starts shear pin, 20, pressure transmission hole, 21, step in piston bush, 22, lock-on connection positioning step, 23, locking spring refers to.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1, present embodiments provide a kind of coiled tubing blanking plug, it comprises the seal operation cylinder 2, screen casing 4, the seeker 8 that are linked in sequence successively from top to bottom, seal operation cylinder 2 upper end external surface is processed with multiple roll extrusion link slot 9 and is set with sealing ring 1 and is connected for sealing with coiled tubing, inside, lower end is processed with locating part 10, for follow-up need to trip out coiled tubing time, drop into seal bar time, carry out spacing to seal bar; The upper end sealing shroud of described screen casing 4 is contained in outside seal operation cylinder 2, and described screen casing 4 prevents the connection between seating nipple 2 from loosening by check pin 3.Be provided with shutoff piston 5 in the upper end internal sleeve of screen casing 4, the middle part of screen casing 4 is provided with multiple screen casing air inlet 11, the lower end of screen casing is provided with step 12 in screen casing that internal diameter becomes large.Described shutoff piston 5 is fixedly installed in screen casing 4 by starting pin 6, is arranged with lock piston ring 7 outside the lower end of shutoff piston 5; Seeker 8, for closing the termination of screen casing 4, prevents shutoff piston 5 to drop formation trouble of lost tool in hole.
When needs trip out coiled tubing, seal operation cylinder 2 is provided with the seal bar with its seal arrangement, its structure as shown in Figure 2, described seal bar comprises the seal bar joint 13 be linked in sequence successively from top to down, piston bush 15, lock-on connection 18, pressure transmission hole 20 is provided with in described seal bar joint 13, outer end is provided with sealing ring 14, described pressure transmission hole 20 is for giving the packed-piston 16 arranged in piston bush 15 by hydraulic pressure transfer, the lower end of described packed-piston 16 is fixed on lock-on connection 18 by starting shear pin 19, described seal bar is provided with position-limit mechanism and retaining mechanism, described position-limit mechanism is arranged on the lower end of lock-on connection 18, and it is corresponding with the locating part 10 on seal operation cylinder 2, packed-piston 16 is provided with retaining mechanism.
In the present embodiment, described locating part 10 is annular boss, the locking spring that described position-limit mechanism is included in the setting of lock-on connection 18 lower end refers to 23 and positioning step 22, and positioning step 22 is positioned at the root that locking spring refers to 23, and described locking spring refers to that the finger tip of 23 is boss-shaped.
In the present embodiment, be provided with step 21 in piston bush in the lower end of piston bush 15, described retaining mechanism is seal bar snap 17, described seal bar snap 17 and step phase configuration in piston bush.
The course of work of the present utility model is: under enter coiled tubing before, coiled tubing blanking plug by roll extrusion link slot 9 with enter well coiled tubing and keep fixing, and realize sealing by sealing ring 1, by the mode of pressurizeing in coiled tubing, shutoff piston 5 is cut off and starts shear pin 6, and go downwards to step 12 place in screen casing 4 screen casing, blocked mutually by piston lock ring 7 and step 12 in screen casing, realize the fixing of piston lock ring 7 and screen casing 4, thus neither cause trouble of lost tool in hole after reaching opening pressure, affect later stage measure operation, also blocking the object of passage can not be produced when producing.When needs trip out coiled tubing, need in coiled tubing, to drop into seal bar at well head, seal bar is after being put into coiled tubing blanking plug, fluid power is applied on packed-piston 16 by pressure transmission hole 20, now, locking spring refer to 23 can under fluid power and Action of Gravity Field shrinkage strain until by the locating part 10 i.e. annular boss of seal operation cylinder 2, and undertaken spacing by positioning step 22, continue through the mode of pressurization, seal bar piston 16 will be cut off and start shear pin 19 and descending until to enter lock-on connection 18 in and to be blocked mutually by step 21 in seal bar snap 17 and piston bush under the effect of fluid power, realize locking, its state as shown in Figure 3, now, seal bar by positioning step 22 and locking spring refer to 23 carry out spacing.Thus, by arranging supporting seal bar, achieving the effective shutoff to coiled tubing in well, facilitating tubing string to trip out safely.
Claims (8)
1. a coiled tubing blanking plug, it comprises the seal operation cylinder be linked in sequence successively from top to bottom, screen casing, seeker, shutoff piston is provided with in the upper end internal sleeve of screen casing, the middle part of screen casing is provided with multiple screen casing air inlet, described shutoff piston is fixedly installed in screen casing by starting pin, it is characterized in that: the lower end of shutoff piston is provided with piston lock ring, the lower end of screen casing is provided with step in screen casing that internal diameter becomes large, when the mode by pressurizeing in coiled tubing, shutoff piston is made to cut off startup shear pin, and go downwards to step place in the screen casing in screen casing, blocked mutually by step in piston lock ring and screen casing, realize shutoff piston and screen casing locks.
2. a kind of coiled tubing blanking plug according to claim 1, is characterized in that the upper end of described screen casing is sleeved on outside seal operation cylinder, the inside, lower end of described seal operation cylinder is provided with locating part.
3. a kind of coiled tubing blanking plug according to claim 2, it is characterized in that corresponding to seal operation cylinder is provided with the seal bar with its seal arrangement, described seal bar is provided with position-limit mechanism and the retaining mechanism for lock sealing bar, and described position-limit mechanism is corresponding with the locating part on seal operation cylinder.
4. a kind of coiled tubing blanking plug according to claim 3, it is characterized in that described seal bar comprises seal bar joint, piston bush, the lock-on connection be linked in sequence successively from top to down, pressure transmission hole is provided with in described seal bar joint, outer end is provided with sealing ring, described pressure transmission hole is used for hydraulic pressure transfer to the packed-piston arranged in piston bush, the lower end of described packed-piston is fixed on lock-on connection by starting shear pin, described position-limit mechanism is arranged on the lower end of lock-on connection, and described retaining mechanism is arranged on packed-piston.
5. a kind of coiled tubing blanking plug according to claim 4, it is characterized in that described locating part is annular boss, the locking spring that described position-limit mechanism is included in the setting of lock-on connection lower end refers to and is positioned on lock-on connection the positioning step that the root that locking spring refers to is arranged.
6. a kind of coiled tubing blanking plug according to claim 4 or 5, it is characterized in that being provided with step in piston bush in the lower end of piston bush, described retaining mechanism is seal bar snap, step phase configuration in described seal bar snap and piston bush.
7. a kind of coiled tubing blanking plug according to claim 1 and 2, is characterized in that described seal operation cylinder upper end external surface is provided with roll extrusion link slot and is set with sealing ring.
8. a kind of coiled tubing blanking plug according to claim 1 and 2, is characterized in that also being connected with check pin between described screen casing and seal operation cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520633433.0U CN205000937U (en) | 2015-08-21 | 2015-08-21 | Coiled tubing blanking plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520633433.0U CN205000937U (en) | 2015-08-21 | 2015-08-21 | Coiled tubing blanking plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205000937U true CN205000937U (en) | 2016-01-27 |
Family
ID=55157832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520633433.0U Active CN205000937U (en) | 2015-08-21 | 2015-08-21 | Coiled tubing blanking plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205000937U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106677735A (en) * | 2016-11-23 | 2017-05-17 | 中国石油天然气股份有限公司 | Blocking device for drainage gas recovery of horizontal well velocity string |
| CN114075939A (en) * | 2022-01-07 | 2022-02-22 | 胜利油田北方实业集团有限责任公司 | Oil pipe plug convenient to operation |
| CN116641682A (en) * | 2023-07-26 | 2023-08-25 | 四川圣诺油气工程技术服务有限公司 | Vortex blade type oil pipe plug and use method thereof |
-
2015
- 2015-08-21 CN CN201520633433.0U patent/CN205000937U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106677735A (en) * | 2016-11-23 | 2017-05-17 | 中国石油天然气股份有限公司 | Blocking device for drainage gas recovery of horizontal well velocity string |
| CN114075939A (en) * | 2022-01-07 | 2022-02-22 | 胜利油田北方实业集团有限责任公司 | Oil pipe plug convenient to operation |
| CN116641682A (en) * | 2023-07-26 | 2023-08-25 | 四川圣诺油气工程技术服务有限公司 | Vortex blade type oil pipe plug and use method thereof |
| CN116641682B (en) * | 2023-07-26 | 2023-09-29 | 四川圣诺油气工程技术服务有限公司 | Vortex blade type oil pipe plug and use method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191213 Address after: 100728 Beijing, Chaoyangmen, North Street, No. 22, No. Co-patentee after: PETROLEUM ENGINEERING TECHNOLOGY RESEARCH INSTITUTE, JIANGHAN OILFIELD BRANCH OF CHINA PETROCHEMICAL CORPORATION Patentee after: China Petrochemical Co., Ltd. Address before: 430035 Hubei city of Wuhan province Gutian two Road No. 37 HSBC Nanniwan Avenue headquarters block fifth B Patentee before: PETROLEUM ENGINEERING TECHNOLOGY RESEARCH INSTITUTE, JIANGHAN OILFIELD BRANCH OF CHINA PETROCHEMICAL CORPORATION |
|
| TR01 | Transfer of patent right |