E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/57
E21B 33/08 (2006.01)
Patent
CA 1189447
"WIPER DEVICE FOR STRIPPING FLUID FROM WELL PIPE" ABSTRACT OF THE DISCLOSURE A wiper device is provided comprising a container having a central opening through which the well string may pass. A pair of opposed wiper pads disposed in a horizontal attitude are mounted in spaced vertical relationship within the container for longitudinal movement toward each other, to engage the vertical string. A double- acting pneumatic cylinder actuates each pad. Each cylinder is mounted in the plane of the pad, said cylinder being connected at its front end with the rear portion of the wiper pad and being pivotally connected at its rear end with a support member. The front end of the cylinder is thus adapted to rotate in a horizontal plane about its pivot connection, to accommodate transverse movement of the attached wiper pad. The con- tainer side walls are spaced from the wiper pad edges to permit such transverse movement to take place. Arrays of anti-friction rollers sup- port each of the pads. The spacing of the walls, pivoting capability of the cylinder in a horizontal plane, and provision of the anti-friction means combine to permit transverse movement of the wiper pads. The head ends of the cylinders are interconnected by a line to enable air, displaced from one cylinder, to move to the other, to permit of longi- tudinal movement of the pads. The head ends of the cylinders are also connected with a pulsation tank, so that if both cylinders are simul- taneously contracted by passage of an enlargement through the pads, there is little change in wiping pressure. Thus the pads can free-float with the well string, while maintaining a substantially constant wiping pressure.
437289
Briscoe Brian H.
Brown William H.
Cuthill Trevor F.
Johnson Ernest Peter
Mclaren Lloyd W.
LandOfFree
Wiper device for stripping fluid from well pipe does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Wiper device for stripping fluid from well pipe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wiper device for stripping fluid from well pipe will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1192922