Patent ID: 9004158
Filing Date: 2015-04-14
Classification: E21B

Abstract:
1. An apparatus for restricting movement of sand in an oil well, the apparatus comprising: a production tubing having an inner diameter; a working barrel positioned in said production tubing; a tubular member affixed to an end of said working barrel; and a seal extending around said tubular member, said seal being of an elastic or an elastomeric material, said seal having an outer periphery contacting said inner diameter of said production tubing; and an annular member extending around said tubular member, said seal extending radially outwardly of said annular member, said annular member being a ring in compressive contact with said seal, said seal having at least one split extending therethrough, said split extending from said outer periphery to said ring, said split comprising a plurality of said splits formed in said seal, said plurality of splits each having a V-shape with a narrow end at said ring and a wide end at said outer periphery.