Setting tool

Claim 1

A setting tool of the type adapted to be made up in a pipe string for releasably engaging a setting sleeve in a well bore, comprising: a mandrel having an upper end adapted to be connected in the pipe stirng, a lower end, and an intermediate supporting shoulder formed on the exterior of said mandrel; a generally cylindrical setting nut carried on said mandrel, said nut having external connecting threads for engaging mating internal connecting theads on the interior of a setting sleeve disposed about the lower end of said mandrel and said setting nut having at least one axial groove in the interior thereof: said mandrel being slidably disposed within said setting nut when said nut is engaging said setting sleeve, said mandrel being slidable between an extended runnin-in position and a weight set-down position wherein said supporting shoulder contacts said setting sleeve; said setting nut having at least one opening in a sidewall thereof for receiving a dog and wherein said setting sleeve interior has a radial groove adapted to engage said dog for preventing relative movement between said connecting threads of said setting nut and said setting sleeve when said mandrel is in said extended running-in position and allowing relative movement between said connecting threads when said mandrel is in said weight set-down position; and at least one torque transmitting spline on said mandrel exterior adapted to be received within said setting nut axial groove whereby torque transmitted to said mandrel is transmitted to said setting nut.

Claim 8

A method of releasing a setting tool of the type adapted to be made up in a pipe string in a well bore from a setting sleeve, comprising the steps of: providing a mandrel having an upper end adapted to be connected in the pipe string and having a lower end; providing a generally cylindrical setting nut carried on said mandrel, said nut having right hand external connecting threads for engaging mating internal connecting threads on the interior of a setting sleeve disposed about the lower end of said mandrel and said setting nut having at least one axial groove in the interior thereof; slidably disposing said mandrel within said setting nut when said nut is engaging said setting sleeve, said mandrel being slidable between an extended running-in position and a weight set-down position: said setting nut being provided with at least the opening in a sidewall thereof for receiving a dog and said setting sleeve interior being provided with a radial groove adapted to engage said dog for preventing relative movement between said connecting threads when said mandrel is in said extended running-in position and allowing relative movement in said weight set-down position, said dog and groove together comprising latch means for preventing relative movement between said connecting threads of said setting nut and said setting sleeve when said mandrel is in said extended, running-in position; providing torque transmitting means on said mandrel for transmitting torque to said setting nut; running said setting tool into the well bore with said mandrel in said extended position and a setting sleeve engaged below said tool by said connecting nut; manipulating said setting sleeve to perform well bore operations by applying right hand torque to said pipe string from the surface; setting weight down on said pipe string form the surface; applying right hand torque to said tool through said pipe string to release said setting tool from said setting sleeve.

Claim 9

A method of releasing a setting tool of the type adapted to be made up in a pipe string in a well bore from a setting sleeve, comprising the steps of: providing a mandrel having an upper end adapted to be connected in the pipe string and having a lower end; providing a generally cylindrical setting nut carried on said mandrel, said nut having right hand external connecting threads for engaging mating internal connecting threads on the interior of a setting sleeve disposed about the lower end of said mandrel and said setting nut having at least one axial groove in the interior thereof; slidably disposing said mandrel within said setting nut when said nut is engaging said setting sleeve, said mandrel being slidable between an extended running-in position and a weight set-down position: said setting nut being provided with at least the opening in a sidewall thereof for receiving a dog and said setting sleeve interior being provided with a radial groove adapted to engage said dog for preventing relative movement between said connecting threads when said mandrel is in said extended running-in position and allowing relative movement in said weight set-down position, said dog and groove together comprising latch means for preventing relative movement between said connecting threads of said setting nut and said setting sleeve when said mandrel is in said extended, running-in position; providing torque transmitting means on said mandrel for transmitting torque to said setting nut; running said setting tool into the well bore with said mandrel in said extended position and a setting sleeve engaged below said tool by said connecting nut; manipulating said setting sleeve to perform well bore operations by applying right hand torque to said pipe string from the surface; setting weight down on said pipe string form the surface; applying right hand torque to said tool through said pipe string to release said setting tool from said setting sleeve.