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Improvements to core-catchers

Abstract

A core catcher consists of a generally annular holder adapted to be contained within a core barrel with sets of dogs circumferentially disposed in the holder. Each set of dogs consists of at least 2 dogs of different lengths pivotally mounted in the holder to swing inward. The dogs in each set are vertically superimposed. They are of upward decreasing length, with the arc of swing of the vertically adjacent dogs overlapping. (8 claims)
Authors:
Publication Date:
Jul 22, 1969
Product Type:
Patent
Report Number:
ZA 68/29592959
Reference Number:
EDB-82-165168
Resource Relation:
Patent File Date: Filed date 8 May 1968
Subject:
42 ENGINEERING; CORING EQUIPMENT; DESIGN; OPERATING COST; RECOVERY; RESERVOIR ENGINEERING; ROCK DRILLING; ROTARY DRILLING; WELL DRILLING; COST; DRILLING; DRILLING EQUIPMENT; ENGINEERING; EQUIPMENT; 420206* - Engineering- Mining & Drilling Equipment & Facilities- (1980-1989)
OSTI ID:
7092909
Country of Origin:
South Africa
Language:
English
Submitting Site:
HEDB
Size:
Pages: v
Announcement Date:

Citation Formats

Johnson, T C.W. Improvements to core-catchers. South Africa: N. p., 1969. Web.
Johnson, T C.W. Improvements to core-catchers. South Africa.
Johnson, T C.W. 1969. "Improvements to core-catchers." South Africa.
@misc{etde_7092909,
title = {Improvements to core-catchers}
author = {Johnson, T C.W.}
abstractNote = {A core catcher consists of a generally annular holder adapted to be contained within a core barrel with sets of dogs circumferentially disposed in the holder. Each set of dogs consists of at least 2 dogs of different lengths pivotally mounted in the holder to swing inward. The dogs in each set are vertically superimposed. They are of upward decreasing length, with the arc of swing of the vertically adjacent dogs overlapping. (8 claims)}
place = {South Africa}
year = {1969}
month = {Jul}
}