CA2223144A1 - Mechanical-hydraulic double-acting drilling jar - Google Patents

Mechanical-hydraulic double-acting drilling jar

Info

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
Application number
CA002223144A
Other languages
French (fr)
Other versions
CA2223144C (en
Inventor
Robert W. Evans
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Weatherford Technology Holdings LLC
Original Assignee
Dailey International Inc.
Robert W. Evans
Dailey Petroleum Services Corp.
Weatherford/Lamb, Inc.
Weatherford Technology Holdings, Llc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from US08/473,067 external-priority patent/US5624001A/en
Application filed by Dailey International Inc., Robert W. Evans, Dailey Petroleum Services Corp., Weatherford/Lamb, Inc., Weatherford Technology Holdings, Llc filed Critical Dailey International Inc.
Publication of CA2223144A1 publication Critical patent/CA2223144A1/en
Application granted granted Critical
Publication of CA2223144C publication Critical patent/CA2223144C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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  • 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.
CA002223144A 1995-06-07 1996-06-03 Mechanical-hydraulic double-acting drilling jar Expired - Lifetime CA2223144C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/473,067 1995-06-07
US08/473,067 US5624001A (en) 1995-06-07 1995-06-07 Mechanical-hydraulic double-acting drilling jar
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)

* Cited by examiner, † Cited by third party
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

Cited By (4)

* Cited by examiner, † Cited by third party
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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MKEX Expiry

Effective date: 20160603