Boring or penetrating the earth – With above-ground cleaner for boring means
Patent
1982-01-20
1983-09-27
Pate, III, William F.
Boring or penetrating the earth
With above-ground cleaner for boring means
175210, 166 82, 1510404, E21B 3308
Patent
active
044063318
ABSTRACT:
The wiper apparatus of this invention is arranged to be located and to seat on top of the rotary head structures such as a Williams Connector or Shaffer blow-out preventor located on top of the casing. This apparatus wipes the mud from the surface of the pipe and, also, provides a catch basin to trap objects such as wrenches and the like which might fall through the casing were it not for this wiper structure. Additionally, this wiper structure provides for damping the vibration of the drill pipe string and assists the slips on the rotary table or rig derrick floor to grasp the drill pipe string and hold it in position while segments of such drill pipe string are added to or removed from the string.
REFERENCES:
patent: 2222082 (1940-11-01), Lemon et al.
patent: 2846247 (1958-08-01), Davis
patent: 2941783 (1960-06-01), Stirson
patent: 3173502 (1965-03-01), Overby
Charlies Rental
Dougherty, Jr. C. Clark
Pate III William F.
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