Locking assembly for well devices
AssigneeOtis Engineering Corporation
InventorsDonald F. Taylor, William G. Boyle
Life of this patent
Estimating the term…
Abstract
A locking assembly for well devices, such as a cable suspended electric pump, for anchoring the device against both axial and rotative movement within a well flow conductor. The assembly includes locking keys engageable with locking recesses provided in the flow conductor to support the device within said conductor. An expander mandrel actuated by the torque forces developed by a rotating element of the well device coacts with said locking keys to urge said keys into tighter locking position and thereby prevent rotation of said assembly within the flow conductor. The assembly also includes an equalizing valve which equalizes pressures across the assembly and the well device prior to releasing the locking action of the locking keys.
Claims13
A locking assembly for locking equipment having a rotating element within a well bore including
- a motor housing having the rotating element extending therethrough,
- a tubular support having its upper end connected with said housing,
- an outer tubular body encircling a portion of said support,
- a plurality of locking keys mounted in said body and movable radially into a locking position within a well fluid conductor extending through said well bore,
- an expander member interposable between the tubular support and the locking keys and movable relative to said keys from a first position in which the keys are unlocked to a second position where the keys are locked,
- means connecting said expander member to the motor housing having the rotating element of said equipment extending therethrough whereby the torque forces developed by said rotating element are transmitted to the expander member and apply a rotative force thereto, and
- coacting means between said expander member and said locking keys for converting the rotative force applied to the expander member into a radial force acting upon the locking keys to urge said keys into tighter locking position.
A locking assembly for locking pumping equipment including a motor, motor housing and rotating shaft within a well conductor comprising
- a tubular landing nipple connected in said well conductor and having annular locking recesses within its bore,
- a tubular support having its upper end connected with the motor housing,
- an outer body circulating a portion of said mandrel and having its bore spaced from the exterior of the mandrel,
- at least one locking key mounted for radial movement in said body,
- each locking key having external projections adapted to engage the locking recesses within the bore of the landing nipple to lock said body within the landing nipple,
- a tubular expander mandrel surrounding the support and movable within a portion of the bore of the outer body to a position behind the locking keys to maintain said keys engaged with the locking recesses,
- means connecting the expander mandrel to the motor housing through the tubular support whereby the torque forces developed by the rotating shaft of the motor are transmitted through the motor housing and support to said expander mandrel to apply a rotative force thereto, and
- coacting means between said expander mandrel and said locking keys for converting the torque forces applied to the expander mandrel into radial forces acting upon the locking keys to urge said keys into tighter radial contact with the recesses of the tubular landing nipple.
Dependencies are inferred from the claim text.