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A well tool for inclusion in a tubing string of a well adapted to perform multiple functions including controlling fluid flow through the tubing string and/or cutting coiled tubing or wire line used in the tubing string for performing well completion and workover functions. The tool includes a tubul

A well tool for inclusion in a tubing string of a well adapted to perform multiple functions including controlling fluid flow through the tubing string and/or cutting coiled tubing or wire line used in the tubing string for performing well completion and workover functions. The tool includes a tubular body connectible in a tubing string and having a flow passage therethrough, a spherical seat surface around the flow passage developed on an eccentrically positioned center relative to the axis of the flow passage, an operator member which may function as a cutter, a valve, or a combination cutter and valve having a spherical surface engageable with the seat surface and mounted on an axis of rotation eccentrically positioned relative to the axis of the flow passage and coincident with the center of the spherical seat surface, an actuator movable longitudinally in the housing and engageable with a surface of the operator member spaced from the axis of rotation of the operator member to rotate the operator member from a first opened position to a second closed position, and return apparatus for rotating the operator member back from the second closed to the first opened position. An annular hydraulically operable piston is provided in the housing to move the actuator. The operator member is a spherical segment formed on a radius which is larger than the radius of the bore through the housing so that by pivoting the operator member eccentrically within the housing maximum torque is generated in the operator member by application of force at a substantial distance from the axis of rotation of the member by the actuator.

대표청구항 ▼

A well tool comprising: a tubular body having an axially extending flow passaGe therethrough; means secured in said tubular body along said flow passage providing a spherical seat surface generated about a center positioned eccentric relative to the longitudinal axis of said flow passage; an operato

A well tool comprising: a tubular body having an axially extending flow passaGe therethrough; means secured in said tubular body along said flow passage providing a spherical seat surface generated about a center positioned eccentric relative to the longitudinal axis of said flow passage; an operator element rotatably secured in said body on an eccentric axis coincident with said center of said spherical seat, said operator element having a spherical surface portion generated about an eccentric center coincident with the center of said spherical seat and having a bore therethrough having an axis spaced from said center of said spherical surface, said operator element being rotatable relative to said seat surface between a first open position at which said bore through said operator element is aligned with said flow passage through said tubular body and a second closed position at which said bore is misaligned from said flow passage through said tubular body; and an actuator member for rotating said operator element from said first position to said second position, said actuator member having a force applying surface engageable with said operator element along a surface on said operator element spaced from said eccentric axis of rotation of said operator element for rotating said operator element about said axis of rotation responsive to longitudinal movement of said actuator member.