Pipe wiper assembly for a well drilling unit

Details Pipe wiper assembly for a well drilling unit Pipe wiper assembly for a well drilling unit

1991-05-14

1992-12-15

Dang, Hoang C.

Boring or penetrating the earth

With above-ground cleaner for boring means

166 84, E21B 3308

Patent

active

051708531

ABSTRACT:
A pipe wiper assembly is provided which comprises a first housing for supportingly receiving at least one resilient wiper member, and a second housing supported above the well bore for connecting the first housing to the stack assembly of the drilling unit. The first and second housings are interconnected such that the first housing is selectively movable in response to vertical deviations of the drill pipe as the drill pipe is withdrawn from the vertically extending well bore.

REFERENCES:
patent: 670900 (1901-03-01), Kenney
patent: 772804 (1904-10-01), Hooper
patent: 4099562 (1978-07-01), Mattoon
patent: 4345766 (1982-08-01), Turanyi
patent: 4399869 (1983-08-01), Bentley
patent: 4406331 (1983-09-01), Bentley
patent: 4690213 (1987-09-01), Stannard et al.
patent: 4889184 (1989-12-01), Lugtmeier et al.

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