Insulated drill collar gap sub assembly for a toroidal coupled t

Details Insulated drill collar gap sub assembly for a toroidal coupled t Insulated drill collar gap sub assembly for a toroidal coupled t

1981-01-30

1985-01-29

Arola, Dave W.

Pipe joints or couplings

With casing, lining or protector

Insulated

285 55, 285330, 285333, 285370, 324356, F16L 1112

Patent

active

044961740

ABSTRACT:
An insulated drill collar gap sub assembly for a toroidal coupled telemetry system including a first annular sub member (150) operable to be connected at one end to a drill collar and a second annular sub member (156) operable to form a part of a drill collar sub. The first and second annular sub members have interconnecting structural members (54, 58) operable to structurally interfere. The interconnecting structural members are dimensioned to form a continuous gap (160) between mutually opposing surfaces and a dielectric material (162) fills the gap to electrically isolate the first annular sub member with respect to the second annular sub member. A bearing member (164) is positioned between the first annular member and the second annular member and is coated with a dielectric insulation (166) to facilitate the formation of a drill collar gap sub assembly of structural and electrical integrity.

REFERENCES:
patent: 1110947 (1914-09-01), Lampert
patent: 2320107 (1943-05-01), Speckert
patent: 2364957 (1944-12-01), Douglas
patent: 2515366 (1950-07-01), Zublin
patent: 2656857 (1953-10-01), Cavallier
patent: 2917704 (1959-12-01), Aeps
patent: 2940787 (1960-06-01), Goodner
patent: 3101207 (1963-08-01), Pavel et al.
patent: 3489437 (1970-01-01), Duret
patent: 3811710 (1974-05-01), Dula et al.

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