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)
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}
}
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}
}