초록 ▼

A downhole tool for controlling the flow of fluids through the well casing includes a tubular mandrel with a flow control valve therein. A radially expandable seal member encircles the mandrel and a sub-bottom defines an abutment member, attached to and movable with the mandrel, for engaging one sid

A downhole tool for controlling the flow of fluids through the well casing includes a tubular mandrel with a flow control valve therein. A radially expandable seal member encircles the mandrel and a sub-bottom defines an abutment member, attached to and movable with the mandrel, for engaging one side of the seal member. A bottom cone is positioned around the mandrel and on the opposite of the seal member from the sub-bottom. The cone has a sleeve extending therefrom positioned between the seal and the mandrel on which the seal member is carried. An upper cone is positioned around the mandrel with slips segments being positioned between the upper and bottom cones. An upper radially expandable seal member encircles the mandrel and its carried on a sleeve extending from the upper cone. A lock hub is positioned around the mandrel and on the side of the upper cone opposite the upper seal and slip segments. The hub is slideable on the mandrel toward the sub-bottom for forcing the cones to converge against the slip segments, causing the segments to ride up on the cones and move radially outwardly. Sequentially the expandable seals are compressed and expanded radially outwardly for engagement against the casing wall. To facilitate drillability, components of the tool are formed of a synthetic resin composite, specifically a polyamide material that is glass fiber filled at a level of a minimum of about 30% by weight, having an extremely high modulus of elasticity and having a heat deflection temperature of about 400°F. fully loaded.

대표청구항 ▼

A tool for controlling the flow of fluid in a well casing in an oil or gas well comprising: a tubular mandrel having a flow passage therethrough with means for connecting one end of the mandrel to the well drill string and with the second end having a flow control valve associated therewith, a radia

A tool for controlling the flow of fluid in a well casing in an oil or gas well comprising: a tubular mandrel having a flow passage therethrough with means for connecting one end of the mandrel to the well drill string and with the second end having a flow control valve associated therewith, a radially expandable seal member encircling and carried on said mandrel, an abutment member attached to and movable with said mandrel for engaging one side of said seal member, a bottom cone positioned around said mandrel and on the opposite side of said seal member from said abutment member, said cone having a sleeve extending therefrom and positioned between said seal and said mandrel and having a conical surface opposite said seal, an upper cone positioned around said mandrel and having a conical surface confronting the conical surface of said bottom cone, slip segments positioned around said mandrel and intermediate of said cones with conical surfaces for engagement with the conical surfaces of said cones, and a lock hub positioned around said mandrel and on the side of said upper cone opposite said slip segments, said hub to receive applied pressure to move relative to said mandrel toward such slip segments causing radial movement thereof and the compression and radial expansion of said seal.