CA2021391A1 - Compensating ring for a down hole hammer - Google Patents

Compensating ring for a down hole hammer

Info

Publication number
CA2021391A1
CA2021391A1 CA 2021391 CA2021391A CA2021391A1 CA 2021391 A1 CA2021391 A1 CA 2021391A1 CA 2021391 CA2021391 CA 2021391 CA 2021391 A CA2021391 A CA 2021391A CA 2021391 A1 CA2021391 A1 CA 2021391A1
Authority
CA
Canada
Prior art keywords
compensating ring
down hole
hole hammer
outer sleeve
drill bit
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
CA 2021391
Other languages
French (fr)
Other versions
CA2021391C (en
Inventor
John Elsby
John Urquhart Dewar
Andrew Greathead
Brian Thomas Sanfead
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.)
Sandvik RC Tools Australia Pty Ltd
Original Assignee
DTA Pty Ltd
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
Application filed by DTA Pty Ltd filed Critical DTA Pty Ltd
Priority to CA 2021391 priority Critical patent/CA2021391C/en
Publication of CA2021391A1 publication Critical patent/CA2021391A1/en
Application granted granted Critical
Publication of CA2021391C publication Critical patent/CA2021391C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Earth Drilling (AREA)

Abstract

The present invention relates to a sacrificial compensating ring for a down hole hammer having an outer sleeve, a drive pub and a drill bit, wherein the sacrificial compensating ring has an outer diameter greater than that of the outer sleeve and substantially the same as that of the drill bit and the sacrificial compensating ring being located between the outer sleeve and the drive sub.
CA 2021391 1990-07-17 1990-07-17 Compensating ring for a down hole hammer Expired - Lifetime CA2021391C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA 2021391 CA2021391C (en) 1990-07-17 1990-07-17 Compensating ring for a down hole hammer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA 2021391 CA2021391C (en) 1990-07-17 1990-07-17 Compensating ring for a down hole hammer

Publications (2)

Publication Number Publication Date
CA2021391A1 true CA2021391A1 (en) 1992-01-18
CA2021391C CA2021391C (en) 2004-03-30

Family

ID=4145506

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2021391 Expired - Lifetime CA2021391C (en) 1990-07-17 1990-07-17 Compensating ring for a down hole hammer

Country Status (1)

Country Link
CA (1) CA2021391C (en)

Also Published As

Publication number Publication date
CA2021391C (en) 2004-03-30

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Legal Events

Date Code Title Description
EEER Examination request
MKEX Expiry