GB2332921A - Double acting hydraulic jar - Google Patents
Double acting hydraulic jarInfo
- Publication number
- GB2332921A GB2332921A GB9902968A GB9902968A GB2332921A GB 2332921 A GB2332921 A GB 2332921A GB 9902968 A GB9902968 A GB 9902968A GB 9902968 A GB9902968 A GB 9902968A GB 2332921 A GB2332921 A GB 2332921A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fluid
- body member
- outer body
- resistance mechanism
- body members
- 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
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B31/00—Fishing for or freeing objects in boreholes or wells
- E21B31/107—Fishing for or freeing objects in boreholes or wells using impact means for releasing stuck parts, e.g. jars
- E21B31/113—Fishing for or freeing objects in boreholes or wells using impact means for releasing stuck parts, e.g. jars hydraulically-operated
- E21B31/1135—Jars with a hydraulic impedance mechanism, i.e. a restriction, for initially delaying escape of a restraining fluid
Abstract
A jar mechanism is described as comprising an outer body member (2, 4, 9, 10, 14, 17), an inner body member (1, 5, 11) which is movably mounted on the outer body member (2, 4, 9, 10, 14, 17), and a fluid chamber (35, 37, 42) which is defined by the inner (1, 5, 11) and outer body members (2, 4, 9, 10, 14, 17). Firstly, a resistance mechanism (12, 13, 48, 50) is described which is in fluid communication with the fluid chamber (35, 37, 42). The inner (1, 5, 11) and outer body members (2, 4, 9, 10, 14, 17) are moveable relative to each other between a first configuration in which the resistance mechanism (12, 13, 48, 50) resists relative movement therebetween, and a second configuration in which the resistance mechanism (12, 13, 48, 50) substantially does not resist relative movement therebetween. The resistance mechanism (12, 13, 48, 50) comprises two valve devices (58), where each valve device (58) resists movement of fluid within the fluid chamber (35, 37, 42) in one direction and the valve devices (58) are arranged to resist the movement of fluid in opposite directions. A releasable locking mechanism (5, 8) is secondly described for locking the inner body member (1, 5, 11) with respect to the outer body member (2, 4, 9, 10, 14, 17), where a piston section (48, 50) permits a load to be applied between the body members after the locking mechanism (5, 8) has released. Optionally, there is at least one flow passage to permit fluid located in the annulus between the body members in flow from one side of the locking mechanism (5, 8) to the other.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9902968A GB2332921B (en) | 1996-09-20 | 1997-09-18 | A jar mechanism |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB9619722.3A GB9619722D0 (en) | 1996-09-20 | 1996-09-20 | Jar mechanism |
PCT/GB1997/002531 WO1998012414A2 (en) | 1996-09-20 | 1997-09-18 | Double acting hydraulic jar |
GB9902968A GB2332921B (en) | 1996-09-20 | 1997-09-18 | A jar mechanism |
Publications (3)
Publication Number | Publication Date |
---|---|
GB9902968D0 GB9902968D0 (en) | 1999-03-31 |
GB2332921A true GB2332921A (en) | 1999-07-07 |
GB2332921B GB2332921B (en) | 2001-03-07 |
Family
ID=26310078
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9902968A Expired - Lifetime GB2332921B (en) | 1996-09-20 | 1997-09-18 | A jar mechanism |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2332921B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2521993C1 (en) * | 2013-02-05 | 2014-07-10 | Общество с ограниченной ответственностью "Фирма "Радиус-Сервис" | Dual-acting hydraulic jar |
RU186752U1 (en) * | 2018-05-21 | 2019-01-31 | Общество С Ограниченной Ответственностью "Вниибт-Буровой Инструмент" | YAS HYDRAULIC |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3221826A (en) * | 1963-12-10 | 1965-12-07 | Houston Engineers Inc | Fluid pressure one-way jar |
US4109736A (en) * | 1976-06-11 | 1978-08-29 | Webb Derrel D | Double acting jar |
US4456081A (en) * | 1982-08-02 | 1984-06-26 | Newman James L | Hydraulic drilling jar |
US5033557A (en) * | 1990-05-07 | 1991-07-23 | Anadrill, Inc. | Hydraulic drilling jar |
GB2286212A (en) * | 1994-01-27 | 1995-08-09 | Houston Engineers Inc | Hydraulic jar |
-
1997
- 1997-09-18 GB GB9902968A patent/GB2332921B/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3221826A (en) * | 1963-12-10 | 1965-12-07 | Houston Engineers Inc | Fluid pressure one-way jar |
US4109736A (en) * | 1976-06-11 | 1978-08-29 | Webb Derrel D | Double acting jar |
US4456081A (en) * | 1982-08-02 | 1984-06-26 | Newman James L | Hydraulic drilling jar |
US5033557A (en) * | 1990-05-07 | 1991-07-23 | Anadrill, Inc. | Hydraulic drilling jar |
GB2286212A (en) * | 1994-01-27 | 1995-08-09 | Houston Engineers Inc | Hydraulic jar |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2521993C1 (en) * | 2013-02-05 | 2014-07-10 | Общество с ограниченной ответственностью "Фирма "Радиус-Сервис" | Dual-acting hydraulic jar |
RU186752U1 (en) * | 2018-05-21 | 2019-01-31 | Общество С Ограниченной Ответственностью "Вниибт-Буровой Инструмент" | YAS HYDRAULIC |
Also Published As
Publication number | Publication date |
---|---|
GB2332921B (en) | 2001-03-07 |
GB9902968D0 (en) | 1999-03-31 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO1998012414A3 (en) | Double acting hydraulic jar | |
CA2211474A1 (en) | Pressure intensifier for fluids, particularly for hydraulic liquids | |
CA2177684A1 (en) | Plates for dual plate check valves | |
CA2643138A1 (en) | Hydraulic stepping valve actuated sliding sleeve | |
WO1998020260A3 (en) | Device for holding in position the rod of a pressure cylinder | |
WO2000012895A3 (en) | Valve seating control device with variable area orifice | |
WO2000012890A3 (en) | Hydraulically-actuated fuel injector with intensifier piston always exposed to high pressure actuation fluid inlet | |
TW200519304A (en) | Adjustable-length compression spring | |
ES2122831A1 (en) | Hydraulic strut for a motor vehicle | |
CA2004537A1 (en) | Hydraulic-pneumatic cylinder device | |
DE3325424C2 (en) | ||
GB2095332A (en) | Fluid operated piston device | |
WO2003033889A3 (en) | Control valve with integrated electro-hydraulic actuator | |
AP2000001838A0 (en) | Valve actuator. | |
GB2332921A (en) | Double acting hydraulic jar | |
ES8505056A1 (en) | Spring. | |
AU4958300A (en) | Leg prosthesis | |
WO1992007194A3 (en) | Control device for hydraulic piston/cylinder unit | |
US4081053A (en) | Lock valve for double acting cylinder | |
CA2324562A1 (en) | Hydraulic fastening of components | |
MX9300944A (en) | PRESSURE RELIEF VALVE WITH AUXILIARY LOADING DEVICE. | |
EP0219833A3 (en) | Portless type master cylinder device with intake valve and flow resisting means between pressure chamber and reservoir chamber | |
GB2276692A (en) | A clutch slave cylinder | |
GB2376727A (en) | Brake fluid circulation | |
DE2419589A1 (en) | FLUD CONTROL VALVE ARRANGEMENT |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) |
Free format text: REGISTERED BETWEEN 20151022 AND 20151028 |
|
PE20 | Patent expired after termination of 20 years |
Expiry date: 20170917 |