Method of inserting a tool into a well under pressure

Details Method of inserting a tool into a well under pressure Method of inserting a tool into a well under pressure

1989-05-12

1990-04-10

Dang, Hoang C.

Wells

Processes

Placing or shifting well part

166 70, 166 77, E21B 33072

Patent

active

049151789

ABSTRACT:
The method comprises inserting each of the sections of a tool in turn into a well under pressure via a pressure lock and using a first cable of small diameter in order to overcome the pressure in the well head, and then replacing the first cable by a second cable of larger diameter once the weight of the sections which have been inserted into the well exceeds a predetermined value which is a function of the diameter of said second cable.

REFERENCES:
patent: 2210359 (1940-08-01), Boulter
patent: 2810439 (1957-10-01), McCullough et al.
patent: 3500907 (1970-03-01), Gentry
patent: 3556209 (1971-01-01), Reistle, III et al.
patent: 3637009 (1972-01-01), James
patent: 4307783 (1981-12-01), Lanmow, II
patent: 4331203 (1982-05-01), Kiefer
patent: 4681168 (1987-07-01), Kisling, III
patent: 4825953 (1989-05-01), Wong et al.

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