External pipe wiping apparatus and method of pulling and wiping

Details External pipe wiping apparatus and method of pulling and wiping External pipe wiping apparatus and method of pulling and wiping

1997-12-22

2000-05-09

Lillis, Eileen Dunn

Boring or penetrating the earth

With above-ground cleaner for boring means

152204, 166 821, E21B 3308

Patent

active

060590521

ABSTRACT:
This device is a pipe wiping apparatus. The pipe wiping structure incorporates a housing and the housing is provided with a central opening to enable the housing to be positioned along the pathway of a pipe string. The pipe string is extended upwardly and passes through the housing. The pipe string is made of a number of drill pipes which are serially connected to extend through the housing so that the external surface can be wiped. As the pipe string passes through the housing, it is exposed to the action of similar wipers which are mounted on multiple actuators where each actuator incorporates a low pressure pneumatic cylinder. The cylinder operates a piston which moves a piston rod which operates a belt crank. This belt crank mechanism rotates an arm to thereby rotate a curving conformed resilient wiper element of sheet material. It is supported on the arm extending radially inwardly toward the pipe. Retraction is permitted to pull the wiper away from the pipe. Each wiper element can move radially toward the pipe to accommodate external upsets in the pipe string.

REFERENCES:
patent: 2264600 (1941-12-01), Webb
patent: 2718021 (1955-09-01), Baebel
patent: 2809012 (1957-10-01), Stevens
patent: 2850754 (1958-09-01), Davis
patent: 3733641 (1973-05-01), Brown
patent: 4399869 (1983-08-01), Bentley
patent: 4457366 (1984-07-01), Brown
patent: 4860826 (1989-08-01), Land
patent: 4982787 (1991-01-01), Reddoch
patent: 5101896 (1992-04-01), Thompson et al.
patent: 5842252 (1998-12-01), Cameron et al.

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