Boring or penetrating the earth – With tool shaft detail – Helix or helically arranged structure
Patent
1987-10-22
1989-03-14
Kisliuk, Bruce M.
Boring or penetrating the earth
With tool shaft detail
Helix or helically arranged structure
138118, 464 18, 29469, E21B 1722, B23P 2100
Patent
active
048118001
ABSTRACT:
The invention relates to an improved drill string member having at least one spiral groove formed in its outside surface and incorporating a combination of engineering considerations and criteria such that the invention member will have an extraordinarily high performance capacity in directional drilling. The invention member can make bends in the well on radii as short as 25-50 feet and is particularly suitable for operation together with downhole motor driven bits.
REFERENCES:
patent: 2460657 (1949-02-01), Robinson
patent: 2999552 (1961-09-01), Fox
patent: 3125173 (1964-03-01), Fox
patent: 3194331 (1965-07-01), Arnold
patent: 3360960 (1968-01-01), Massey
patent: 3554307 (1971-01-01), Yount
patent: 4365678 (1982-12-01), Fitch
patent: 4443762 (1984-04-01), Kuckes
patent: 4460202 (1984-07-01), Chance et al.
Beatty Glenn E.
Hill Guy J.
Schnitker Mark W.
Smith, Jr. Homer G.
Cabic Edward J.
Homco International Inc.
Kisliuk Bruce M.
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