CA2596383A1 - Underbalanced downhole casing valve and force open tool thereof - Google Patents
Underbalanced downhole casing valve and force open tool thereof Download PDFInfo
- Publication number
- CA2596383A1 CA2596383A1 CA 2596383 CA2596383A CA2596383A1 CA 2596383 A1 CA2596383 A1 CA 2596383A1 CA 2596383 CA2596383 CA 2596383 CA 2596383 A CA2596383 A CA 2596383A CA 2596383 A1 CA2596383 A1 CA 2596383A1
- Authority
- CA
- Canada
- Prior art keywords
- outer cylinder
- cylinder
- upper outer
- underbalanced
- fitting
- 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
- 239000012530 fluid Substances 0.000 claims abstract 8
- 230000013011 mating Effects 0.000 claims 1
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- Earth Drilling (AREA)
- Lift Valve (AREA)
Abstract
The present invention relates to an underbalanced downhole casing valve controlled hydraulically, wherein: a hydraulic fluid chamber (11) formed between bosses in the inner chamber of an upper fitting and on the outer surface of an inner cylinder and on the inner surface of an upper outer cylinder; a hydraulic fluid chamber (12) formed between the lower portion of the boss of the inner cylinder and an inner chamber of the upper outer cylinder; Axial bores are disposed on the upper end of the upper outer cylinder, two of them are respectively fluidly communicated with the hydraulic fluid chamber (11) and the hydraulic fluid chamber (12); an annulus formed between the lower portion of the upper outer cylinder and the inner cylinder, which is communicated with the bore disposed in the upper outer cylinder and is communicated with an annulus defined by the upper outer cylinder and the valve assembly. If one person wants to open/close the casing valve, he/she only pumps using one/the other pipe. When the casing valve is closed, the downhole pressure can be measured. When the underbalanced downhole casing valve is closed and can not be opened by the hydraulic pressure on the ground, the underbalanced downhole casing valve can be opened and locked in a permanent open state by the matched force open tool.
Claims (3)
1. An underbalanced downhole casing valve controlled hydraulically comprising : an upper fitting (1), an inner cylinder (2), an upper outer cylinder (3), a lower outer cylinder (4), a valve assembly (5) and a lower fitting (6), wherein, steps machined on the inner surface of the upper outer cylinder (3);
the valve assembly (5) situated within an annulus defined by the upper outer cylinder (3), the lower outer cylinder (4) and the inner cylinder (2);
bosses respectively disposed in the inner chamber of the upper fitting (1) and on the outer surface of the inner cylinder (2), the upper outer cylinder (3) and the inner cylinder (2) being clearance fit;
a hydraulic fluid chamber (11) formed between the bosses in the inner chamber of the upper fitting (1) and bosses on the outer surface of the inner cylinder (2) and the inner surface of the upper outer cylinder (3);
a hydraulic fluid chamber (12) formed between the lower portion of the bosses in the inner cylinder (2) and the inner chamber of the upper outer cylinder (3) ;
axial bores disposed on the upper end of the upper outer cylinder (3); a hydraulic controlling system connected to the bores by pipes, two of the bores respectively fluidly communicated with the hydraulic fluid chamber (11) and the hydraulic fluid chamber (12);
an annulus formed between the lower portion of the upper outer cylinder (3) and the inner cylinder (2), the annulus fluidly communicated with the bore disposed in the upper outer cylinder (3) and fluidly communicated with an annulus defined by the upper outer cylinder (3) and the valve assembly (5).
the valve assembly (5) situated within an annulus defined by the upper outer cylinder (3), the lower outer cylinder (4) and the inner cylinder (2);
bosses respectively disposed in the inner chamber of the upper fitting (1) and on the outer surface of the inner cylinder (2), the upper outer cylinder (3) and the inner cylinder (2) being clearance fit;
a hydraulic fluid chamber (11) formed between the bosses in the inner chamber of the upper fitting (1) and bosses on the outer surface of the inner cylinder (2) and the inner surface of the upper outer cylinder (3);
a hydraulic fluid chamber (12) formed between the lower portion of the bosses in the inner cylinder (2) and the inner chamber of the upper outer cylinder (3) ;
axial bores disposed on the upper end of the upper outer cylinder (3); a hydraulic controlling system connected to the bores by pipes, two of the bores respectively fluidly communicated with the hydraulic fluid chamber (11) and the hydraulic fluid chamber (12);
an annulus formed between the lower portion of the upper outer cylinder (3) and the inner cylinder (2), the annulus fluidly communicated with the bore disposed in the upper outer cylinder (3) and fluidly communicated with an annulus defined by the upper outer cylinder (3) and the valve assembly (5).
2. The underbalanced downhole casing valve according to claim 1, further comprising a lock collar (8) and a shear pin (7), wherein :
the lock collar (8) installed within the inner chamber of the lower fitting (6);
steps formed on the inner surface of the lower fitting (6) , and the lower end surface of the lock collar (8) positioned on the step on the inner surface of the lower fitting (6);
the lower fitting (6) connected with the lock collar (8) by the shear pin (7);
inverted teeth machined on the outer surface of the upper end of the lock collar (8) and on the inner surface of the lower fitting (6);
the outer diameter of the lock collar (8) is smaller than the inner diameter of the valve assembly (5).
the lock collar (8) installed within the inner chamber of the lower fitting (6);
steps formed on the inner surface of the lower fitting (6) , and the lower end surface of the lock collar (8) positioned on the step on the inner surface of the lower fitting (6);
the lower fitting (6) connected with the lock collar (8) by the shear pin (7);
inverted teeth machined on the outer surface of the upper end of the lock collar (8) and on the inner surface of the lower fitting (6);
the outer diameter of the lock collar (8) is smaller than the inner diameter of the valve assembly (5).
3. A force open tool for the underbalanced downhole casing valve according to claim 2, comprising: a body (13), a spring block (14), a hydraulic anchor (15), a resilient sleeve (16), a tee (17) and a guide head (18), wherein:
Steps provided on the outer surface of the body (13);
the spring block (14) and the hydraulic anchor (15) respectively fixed to the upper portion and the middle portion of the body (13);
the resilient sleeve (16) covering the outer surface of the lower portion of the body (13), and a boss disposed on the middle portion of the outer surface of the resilient sleeve (16), thru slots distributed equably around the circumference throughout the entire length of the boss;
the boss disposed on the middle outer surface of the resilient sleeve (16) mating with a groove right disposed in the underbalanced downhole casing valve according to claim 2;
the tee (17) mounted on the lower portion of the inner chamber of the body (13);
the guide head (18) mounted on the end portion of the body (13).
Steps provided on the outer surface of the body (13);
the spring block (14) and the hydraulic anchor (15) respectively fixed to the upper portion and the middle portion of the body (13);
the resilient sleeve (16) covering the outer surface of the lower portion of the body (13), and a boss disposed on the middle portion of the outer surface of the resilient sleeve (16), thru slots distributed equably around the circumference throughout the entire length of the boss;
the boss disposed on the middle outer surface of the resilient sleeve (16) mating with a groove right disposed in the underbalanced downhole casing valve according to claim 2;
the tee (17) mounted on the lower portion of the inner chamber of the body (13);
the guide head (18) mounted on the end portion of the body (13).
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620130797 CN200978652Y (en) | 2006-08-07 | 2006-08-07 | Hydraulic control under-balanced downhole casing valve |
| CN200620130797.8 | 2006-08-07 | ||
| CNU2007201392392U CN201031660Y (en) | 2007-02-06 | 2007-02-06 | Tools for forcedly opening under balance down-hole casing tube valve forced |
| CN200720139239.2 | 2007-02-06 | ||
| CN200720139242.4 | 2007-02-06 | ||
| CNU2007201392424U CN201031661Y (en) | 2007-02-06 | 2007-02-06 | Hydraulic controlled under balance down-hole casing tube valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2596383A1 true CA2596383A1 (en) | 2008-02-07 |
| CA2596383C CA2596383C (en) | 2010-04-06 |
Family
ID=39030970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2596383A Active CA2596383C (en) | 2006-08-07 | 2007-08-07 | Underbalanced downhole casing valve and force open tool thereof |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2596383C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111306238A (en) * | 2020-02-20 | 2020-06-19 | 唐山保靓汽车配件有限公司 | Multi-angle adjusting oil pipe assembly |
-
2007
- 2007-08-07 CA CA2596383A patent/CA2596383C/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CA2596383C (en) | 2010-04-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |