CN202348215U - Cement-injection leaking stoppage separation balancer - Google Patents
Cement-injection leaking stoppage separation balancer Download PDFInfo
- Publication number
- CN202348215U CN202348215U CN2011203813797U CN201120381379U CN202348215U CN 202348215 U CN202348215 U CN 202348215U CN 2011203813797 U CN2011203813797 U CN 2011203813797U CN 201120381379 U CN201120381379 U CN 201120381379U CN 202348215 U CN202348215 U CN 202348215U
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- cement
- injection
- separation
- balancer
- central tube
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Abstract
The utility model relates to a cement-injection leaking stoppage separation balancer, which mainly consists of an actuating mechanism and a packing body. The actuating mechanism comprises a connecting sleeve, a cylinder sleeve, a piston and a support ring; and the packing body comprises a central tube, a locking ring, a rubber barrel, a ball seat and a self-locking rubber plug. The upper part of the cement-injection leaking stoppage separation balancer is connected with a drill rod; the drill rod is pressurized before cement injection, so that the piston compresses the rubber barrel to block the rubber barrel and form an annular space; and when the mud replacement is carried out after the cement injection is finished, the self-locking rubber plug is pressed in, the separation of the actuating mechanism from the packing body and the internal annular space of a sealing tool are realized, and thus a borehole is completely blocked. The cement-injection leaking stoppage separation balancer has the advantages of simple structure and safety and reliability in construction, cement mortar can be prevented from being diluted by mud, and the quantity of the cement mortar entering a leaking layer and the height of a cement plug in a well casing can be reliably controlled, so that the cement mortar can be excellently solidified, and the cement-injection leaking stoppage effect is improved; and meanwhile, the cement-injection leaking stoppage separation balancer can bear certain operating differential pressure after the borehole is blocked, and the formation pressure and the leaking layer pressure can be balanced so as to prevent kick and blowout.
Description
Technical field
The utility model is used to improve a kind of cementing leak stopping partition equalizer of cementing plugging effect when relating to Process of Oil Well Drilling generation leakage.
Background technology
Leakage is medium-term and long-term existence of drilling process and insoluble technical barrier, and it not only expends drilling time, loss mud, and might cause a series of complex situations such as bit freezing, blowout, well slough, even cause well to be scrapped, cause great economic loss.
Conventional cementing leak stopping since the cement source of goods extensively, low price, join that slurry is simple, bearing capacity is high; In leakage stopping technology, play important effect always; But the leak-stopping technique parameter is not easy accurately to calculate and grasp during owing to blocking construction, the construction complicacy, and " forward " of cement and " rear guard " they are again inevitable by the mud dilution; So adopting the cement paste leak stopping to influence Cementation Quality because of mixing slurry often, even be difficult to form effective cement plug; Or cement plug is too high, and the cement paste that gets into drop ply is few, often repeatedly could success after the leak stopping, cause a large amount of cement paste losses, and the labor time, reduced the success rate of cementing leak stopping.
Summary of the invention
The utility model provides a kind of cementing leak stopping to cut off equalizer, and main purpose is at design cement plug height place mud and cement paste to be blocked fully, thereby avoids mud dilution cement paste; Control gets into the cement slurry volume of drop ply and the height of the interior cement plug of pit shaft reliably; Cement paste is well solidified, improve plugging effect, can bear certain operting differential pressure behind the annular space of the utility model blocking-up simultaneously; Equilibrium strata pressure and drop ply pressure prevent well kick and blowout.
In order to realize the purpose of the utility model, to design a kind of cementing leak stopping and cut off equalizer, it comprises executing agency and packer two parts, executing agency is connected with support ring through claw with packer; Executing agency comprises adapter sleeve, cylinder sleeve, piston, limited block and support ring, and packer is made up of central tube, lock ring, lock ring seat, packing element, glue tube base, ball seat and self-locking plug.
Suppress in the cementing forward direction drilling rod, adapter sleeve is provided with 3 inlet openings, and liquid in pipe acts on the piston through inlet opening; When reaching the certain pressure value; The seat offset nail that connects central tube and piston is cut off, and piston promotes binding ring and lock sleeve is descending and the compression packing element, the sealing annular space.Lock ring has unidirectional stopping locking effect, can not reset after packing element is compressed.
Continue to suppress, when pressure reached certain value, the pin that connects ball seat and central tube was cut off, and ball seat is struck off, for following cementing blocking construction is got ready.
Cemented up is pressed into the self-locking plug when replacing slurry, and after self-locking plug and support ring touched, the pipe internal pressure raise, and when being elevated to certain pressure, separating shear pin and is cut off, and support ring is descending with the self-locking plug, is pressed into the plug seat, the interior annular space and locked of sealing tool.
After support ring was descending, the claw of adapter sleeve bottom lost support, on carry drill string; Claw breaks away from from cannelure, and cylinder sleeve and piston lift out well head with drill string, and packer is still stayed in the pit shaft; Packer all is to form by boring materials processing; After waiting to the cement solidifies, be lowered to drilling tool packer parts and cement plug are bored mill off, recover normally to drill.
Compared with present technology the utility model has following distinguishing feature: mud dilution cement paste is avoided in (1), and accurately control gets into the cement slurry volume and the cement plug height of drop ply, and cement paste is well solidified, and improves plugging effect; (2) simple in structure, construction safety is reliable, and cylinder sleeve and piston can be reused, and reduce cost; (3) can bear certain operting differential pressure, equilibrium strata pressure and drop ply pressure prevent well kick and blowout.
Description of drawings
Fig. 1 is the utility model structural representation.
Structural representation when Fig. 2 replaces slurry for the utility model cemented up.
Fig. 3 separates the rear lower structural representation for the utility model executing agency with packer.
Among the figure, 1, adapter sleeve, 2, cylinder sleeve, 3, inlet opening, 4, piston, 5, support ring; 6, limited block, 7, seat envelope shear pin, 8, lock ring, 9, the lock ring cover, 10, packing element, 11, spacer ring; 12, glue tube base, 13, shear pin, 14, ball seat, 15, the self-locking plug, 16, central tube.
The specific embodiment
Cut off equalizer like Fig. 1, cementing leak stopping shown in Figure 3, it comprises executing agency and packer two parts: executing agency is connected with support ring 5 through claw with packer; Executing agency comprises adapter sleeve 1, cylinder sleeve 2, piston 4, limited block 6 and support ring 5; Adapter sleeve 1 top and drilling rod join, and cylinder sleeve 2 links through screw thread and adapter sleeve 1, and piston 4 is between adapter sleeve 1 and cylinder sleeve 2; Be connected on the central tube 16 through seat offset nail 7; Limited block 6 is used for limiting the displacement of piston through being threaded in the lower end of cylinder sleeve 2, thus the maximum compressibility of control packing element.Packer is made up of central tube 16, lock ring 8, lock ring seat 9, packing element 10, glue tube base 12, ball seat 14 and self-locking plug 15, and glue tube base 12 is connected with central tube 16 through screw thread, and ball seat 14 is connected with central tube 16 through shear pin 13; Central tube 16 inner shoulders are the plug seat, after self-locking plug 15 is pressed into the plug seat, and annular space and locked in the sealing tool; Central tube 16 external surfaces are provided with the unidirectional locking button; Lock ring 8 is a split ring, and inner surface is provided with the unidirectional locking button, and lock ring 8 is contained on the central tube 16; The effect of unidirectional stopping can be played, the packing element rollback can be prevented after the packing element compression.
During construction cementing leak stopping partition equalizer and drilling rod are joined, G.I.H is suppressed to central tube through drilling rod to the design TOCP; Liquid in pipe acts on the piston through inlet opening, and when hydraulic pressure reached the certain pressure value, the seat offset nail 7 that connects central tube 16 and piston 4 was cut off; Piston 4 promotes lock ring 8 and lock sleeve 9 and compresses packing element 10; The sealing annular space, lock ring 8 has stopping locking effect, can not retreat after packing element 10 is compressed.
Continue to suppress, the shear pin 13 that connects ball seat 14 and central tube 16 is cut off, and ball seat 14 is struck off; The cementing passage is opened, and injects cement through drilling rod and this instrument to drop ply, because of annular space is blocked; Cement paste all gets in the bottom pit shaft of this instrument, has avoided upper annulus mud dilution cement paste.
Cemented up is pressed into self-locking plug 15 (referring to Fig. 2) when replacing slurry, after self-locking plug 15 touched with support ring 7, the pipe internal pressure raise; When being elevated to certain pressure, separate shear pin and cut off, support ring 7 is descending with plug 15; Be pressed into the plug seat, annular space and self-locking in the sealing tool, this moment, top mud fluid column and bottom cement paste were kept apart fully; The swabbing action that trip-out produces and the reduction of pit shaft liquid level all can't influence the cement paste that has got in the drop ply; Can bear certain operting differential pressure behind the packing element 10 sealing annular spaces, equilibrium strata pressure and drop ply pressure prevent well kick and blowout.
After support ring 5 was descending, the claw of adapter sleeve 1 bottom lost support, on carry drill string; Claw breaks away from from cannelure, and cylinder sleeve and piston lift out well head with drill string, and packer is still stayed in the pit shaft (referring to Fig. 3); The packer component all are to form by boring materials processing; After waiting to the cement solidifies, be lowered to drilling tool packer parts and cement plug are bored mill off, recover normally to drill.
Claims (3)
1. a cementing leak stopping cuts off equalizer, mainly contains executing agency and packer two parts and forms, and it is characterized in that executing agency is connected with support ring (5) through claw with packer.
2. cementing leak stopping according to claim 1 cuts off equalizer; It is characterized in that: executing agency is made up of adapter sleeve (1), cylinder sleeve (2), piston (4), limited block (6) and support ring (5); Adapter sleeve (1) top and drilling rod join, and cylinder sleeve (2) is connected with adapter sleeve (1) through screw thread, and piston (4) is between adapter sleeve (1) and cylinder sleeve (2); Be connected on the central tube (16) through seat offset nail (7); Limited block (6) can limit the displacement of piston (4) through being threaded in the lower end of cylinder sleeve (2), thus the maximum compressibility of control packing element (10).
3. cementing leak stopping according to claim 1 cuts off equalizer; It is characterized in that: packer comprises central tube (16), lock ring (8), lock ring cover (9), packing element (10), glue tube base (12), ball seat (14); Glue tube base (12) is connected with central tube (16) through screw thread, and ball seat (14) is connected with central tube (16) through shear pin (13), and the inner shoulder of central tube (16) is the plug seat; After self-locking plug (15) is pressed into the plug seat, annular space and locked in the sealing tool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203813797U CN202348215U (en) | 2011-10-10 | 2011-10-10 | Cement-injection leaking stoppage separation balancer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203813797U CN202348215U (en) | 2011-10-10 | 2011-10-10 | Cement-injection leaking stoppage separation balancer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202348215U true CN202348215U (en) | 2012-07-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203813797U Expired - Fee Related CN202348215U (en) | 2011-10-10 | 2011-10-10 | Cement-injection leaking stoppage separation balancer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202348215U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104153738A (en) * | 2013-05-14 | 2014-11-19 | 四川海沃石油工程技术有限公司 | Blocking controlling and leaking stopping tool assembly and leaking stopping method applied to drilling engineering |
| CN113323619A (en) * | 2020-02-28 | 2021-08-31 | 中国石油化工股份有限公司 | Leakage blocking method for oil and gas well |
| CN113482569A (en) * | 2021-07-16 | 2021-10-08 | 常州大学 | Multistage disconnect-type grout leaking stoppage instrument |
-
2011
- 2011-10-10 CN CN2011203813797U patent/CN202348215U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104153738A (en) * | 2013-05-14 | 2014-11-19 | 四川海沃石油工程技术有限公司 | Blocking controlling and leaking stopping tool assembly and leaking stopping method applied to drilling engineering |
| CN113323619A (en) * | 2020-02-28 | 2021-08-31 | 中国石油化工股份有限公司 | Leakage blocking method for oil and gas well |
| CN113323619B (en) * | 2020-02-28 | 2022-07-01 | 中国石油化工股份有限公司 | Plugging method for oil and gas well |
| CN113482569A (en) * | 2021-07-16 | 2021-10-08 | 常州大学 | Multistage disconnect-type grout leaking stoppage instrument |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120725 Termination date: 20131010 |