CA2223144A1 - Mechanical-hydraulic double-acting drilling jar - Google Patents
Mechanical-hydraulic double-acting drilling jarInfo
- Publication number
- CA2223144A1 CA2223144A1 CA002223144A CA2223144A CA2223144A1 CA 2223144 A1 CA2223144 A1 CA 2223144A1 CA 002223144 A CA002223144 A CA 002223144A CA 2223144 A CA2223144 A CA 2223144A CA 2223144 A1 CA2223144 A1 CA 2223144A1
- Authority
- CA
- Canada
- Prior art keywords
- mandrel
- housing
- collet
- mechanical
- movement
- 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
- 238000005553 drilling Methods 0.000 title abstract 2
- 239000012530 fluid Substances 0.000 abstract 1
- 238000005381 potential energy Methods 0.000 abstract 1
- 230000000979 retarding effect Effects 0.000 abstract 1
Landscapes
- Earth Drilling (AREA)
Abstract
A mechanical-hydraulic double-acting drilling jar includes an inner tubular mandrel (12)telescopingly supported inside an outer tubular housing (14). The mandrel and the housing each consist of a plurality of tubular segments joined together, preferably by threaded inner connections. Upper (134) and lower (166) pressure pistons are slidably disposed within the housing, respectively closing upper and lower substantially sealed hydraulic chambers (132,164). Longitudinal movement of the mandrel engages the collet (184), which in tum, translates either the upper piston (134) or the lower piston (166), depending on the direction of mandrel movement. As one of the pistons is moved, fluid pressure builds in the associated hydraulic chamber, retarding further movement of the mandrel, enabling potential energy to build in the drill string. The collet is restricted from expanding until the mandrel reaches a particular point in the housing, at which time the collet expands, releasing the mandrel to rapidly collide a hammer surface (32,21) thereon with an anvil surface (44,41) in the housing.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/473,067 US5624001A (en) | 1995-06-07 | 1995-06-07 | Mechanical-hydraulic double-acting drilling jar |
US08/473,067 | 1995-06-07 | ||
PCT/US1996/008645 WO1996041064A1 (en) | 1995-06-07 | 1996-06-03 | Mechanical-hydraulic double-acting drilling jar |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2223144A1 true CA2223144A1 (en) | 1996-12-19 |
CA2223144C CA2223144C (en) | 2005-12-20 |
Family
ID=35645825
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002223144A Expired - Lifetime CA2223144C (en) | 1995-06-07 | 1996-06-03 | Mechanical-hydraulic double-acting drilling jar |
Country Status (1)
Country | Link |
---|---|
CA (1) | CA2223144C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113338832A (en) * | 2021-05-18 | 2021-09-03 | 四川伟创石油装备制造有限公司 | Hydraulic bidirectional jar |
CN113846986A (en) * | 2021-12-02 | 2021-12-28 | 成都高峰石油机械有限公司 | Jar while drilling |
-
1996
- 1996-06-03 CA CA002223144A patent/CA2223144C/en not_active Expired - Lifetime
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113338832A (en) * | 2021-05-18 | 2021-09-03 | 四川伟创石油装备制造有限公司 | Hydraulic bidirectional jar |
CN113338832B (en) * | 2021-05-18 | 2023-10-20 | 四川伟创石油装备制造有限公司 | Hydraulic bidirectional jar |
CN113846986A (en) * | 2021-12-02 | 2021-12-28 | 成都高峰石油机械有限公司 | Jar while drilling |
CN113846986B (en) * | 2021-12-02 | 2022-02-15 | 成都高峰石油机械有限公司 | Jar while drilling |
Also Published As
Publication number | Publication date |
---|---|
CA2223144C (en) | 2005-12-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKEX | Expiry |
Effective date: 20160603 |