Reinforced seal unit for pumpdown pistons or well swabs

Details Reinforced seal unit for pumpdown pistons or well swabs Reinforced seal unit for pumpdown pistons or well swabs

E - Fixed Constructions

21

B

103/148, 277/29,

E21B 37/00 (2006.01) E21B 23/10 (2006.01) E21B 37/10 (2006.01) F16J 15/32 (2006.01)

Patent

CA 1102690

ABSTRACT OF THE DISCLOSURE A piston for use as a TFL locomotive or well swab having a seal unit forming a fluid seal between the piston and the inner wall of a flow conductor or tubing string. The seal unit comprising at least one annular fin or lip extending radially from the piston. The annular fin or lip having an exterior portion formed from elastomeric material which is deformable to seal with the flow conductor and an interior portion formed from elastomeric material molded on wire mesh. The interior portion providing increased wear resistance and strength for the annular lip. In one version, the piston carries several individual seal units each having an annular lip.

336926

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