Dual-bore, antirotating pump assembly
AssigneeBaker Hughes Incorporated
InventorsSidney K. Smith, Jr., Olav Revheim
Life of this patent
Estimating the term…
Abstract
An assembly for a production string with a downhole pump is disclosed which makes use of the polished bore in the top of the liner already installed in the wellbore. Lugs on the assembly align themselves with longitudinal grooves in the top of the liner assembly as an antirotation feature for when the downhole pump is operated. A signaling assembly, involving a collet which can be ultimately released, gives the surface personnel the feedback they need to know that the assembly has been set in the proper place in the top of the liner string, as opposed to another location in the wellbore. Seals, preferably stacks of opposed chevron seals, can be used to bridge the gap between the assembly and the seal bore at the top of the liner.
Claims17
An apparatus for use with downhole liners having a seal bore and at least one longitudinal slot, comprising:
- a tubular segment;
- a locator mounted externally to said tubular segment, further comprising:
- a seal selectively engageable with the seal bore upon advancement of said tubular segment;
- a lock mechanism engageable by substantially longitudinal movement to the longitudinal slot for selectively securing said tubular against rotational loads imposed on said tubular segment downhole.
An apparatus for use with downhole linen having a seal bore and at least one longitudinal slot, comprising:
- a tubular segment;
- a locator mounted externally to said tubular segment, further comprising:
- a seal selectively engageable with the seal bore upon advancement of said tubular segment;
- a lock mechanism engageable to the longitudinal slot for selectively securing said tubular against rotational loads imposed on said tubular segment downhole;
- said lock mechanism further comprises at least one torque finger movable longitudinally for entry into the slot;
- said torque finger is spring-biased toward the slot;
- said torque finger further comprises at least one longitudinal lug;
- and
- said locator formed having a corresponding groove to accept said lug to guide the longitudinal movement of said torque finger.
An apparatus for use with downhole linen having a seal bore and at least one longitudinal slot, comprising:
- a tubular segment;
- a locator mounted externally to said tubular segment, further comprising:
- a seal selectively engageable with the seal bore upon advancement of said tubular segment;
- a lock mechanism engageable to the longitudinal slot for selectively securing said tubular against rotational loads imposed on said tubular segment downhole;
- and
- a signal mechanism mounted to said locator to selectively engage the liner subsequent to entry of said seal into the seal bore, said signal mechanism resisting up to a predetermined force before release to provide a surface signal that said seal is in the seal bore.
An apparatus for use with downhole liners having a seal bore and at least one longitudinal slot, comprising:
- a tubular segment;
- a locator mounted externally to said tubular segment, further comprising:
- a seal selectively engageable with the seal bore upon advancement of said tubular segment;
- a lock mechanism engageable to the longitudinal slot for selectively securing said tubular against rotational loads imposed on said tubular segment downhole;
- said lock mechanism further comprises at least one torque finger movable longitudinally for entry into the slot;
- a signal mechanism mounted to said locator to selectively engage the liner subsequent to entry of said seal into the seal bore, said signal mechanism resisting up to a predetermined force before release to provide a surface signal that said seal is in the seal bore;
- said signal mechanism further comprises at least one collet selectively engageable with the liner, and
- a shear pin to allow release from the liner after an upward pull from the surface exceeding a predetermined value.
Dependencies are inferred from the claim text.