Cleaning and liquid contact with solids – Processes – Using solid work treating agents
Patent
1996-07-24
1998-08-18
Pyon, Harold Y.
Cleaning and liquid contact with solids
Processes
Using solid work treating agents
134 2212, 134 2213, 15104061, 15104063, 15 35, B08B 904
Patent
active
057954020
ABSTRACT:
An apparatus and a method for cleaning the inner wall of a pipeline, which includes providing a pig component, of the type having a pig body, a plurality of spacers around the pig body, the spacers making contact with an inner surface of the pipeline wall, a forward end of the pig having a plurality of pressure nozzles positioned thereon for allowing fluid under pressure to flow therefrom onto the inner wall of the pipeline; a bore through the pig body extending from an opening in a rear end of the pig, to the forward end of the pig; a valving member on the forward end of the pig for moving to the open position to allow the fluid to flow to the pressure nozzles when sufficient fluid pressure is placed on the valving member; providing a fluid under pressure, such as water or chemicals, to the rear and front of the pig, the fluid forcing the pig to move forward under pressure; encountering an obstruction, such as paraffin, formed along the inner wall of the pipeline fo such amount to hinder the forward movement of the pig through the pipeline; increasing the pressure on the pig sufficient to moving the valving member to the open position for allowing the fluid under pressure to spray from the pressure nozzles against the paraffin obstruction sufficiently to dislodge the paraffin from the wall of the pipeline; resuming the speed of the pig after the paraffin obstruction has been dislodged so that the pig forces the paraffin through and out of the end of the pipeline.
REFERENCES:
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patent: 2117648 (1938-05-01), Bottorf
patent: 3900912 (1975-08-01), Lenz et al.
patent: 3939519 (1976-02-01), Muirhead
patent: 4411039 (1983-10-01), Timmins et al.
patent: 4498932 (1985-02-01), Kruka
patent: 4603449 (1986-08-01), Knapp
Casey Ernest D.
Casey Ian D.
Hargett, Sr. Daniel
Chaudhry Saeed
Pyon Harold Y.
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