CA623430A - Drill pipe differential pressure equalizer and protector - Google Patents

Drill pipe differential pressure equalizer and protector

Info

Publication number
CA623430A
CA623430A CA623430A CA623430DA CA623430A CA 623430 A CA623430 A CA 623430A CA 623430 A CA623430 A CA 623430A CA 623430D A CA623430D A CA 623430DA CA 623430 A CA623430 A CA 623430A
Authority
CA
Canada
Prior art keywords
protector
differential pressure
drill pipe
pressure equalizer
pipe differential
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.)
Expired
Application number
CA623430A
Inventor
A. Hall John
D. Hall Elmer
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.)
Individual
Original Assignee
Individual
Publication date
Application granted granted Critical
Publication of CA623430A publication Critical patent/CA623430A/en
Expired legal-status Critical Current

Links

CA623430A Drill pipe differential pressure equalizer and protector Expired CA623430A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA623430T

Publications (1)

Publication Number Publication Date
CA623430A true CA623430A (en) 1961-07-11

Family

ID=35878609

Family Applications (1)

Application Number Title Priority Date Filing Date
CA623430A Expired CA623430A (en) Drill pipe differential pressure equalizer and protector

Country Status (1)

Country Link
CA (1) CA623430A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3360846A (en) * 1965-03-15 1968-01-02 Herman J. Schellstede Method of securing a collar on a pipe
US3411837A (en) * 1966-11-28 1968-11-19 Sparta Ind Inc Drill pipe protector
US4668117A (en) * 1986-04-01 1987-05-26 Black Gold Pump & Supply, Inc. Rod coupling with mounted guide

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3360846A (en) * 1965-03-15 1968-01-02 Herman J. Schellstede Method of securing a collar on a pipe
US3411837A (en) * 1966-11-28 1968-11-19 Sparta Ind Inc Drill pipe protector
US4668117A (en) * 1986-04-01 1987-05-26 Black Gold Pump & Supply, Inc. Rod coupling with mounted guide

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