초록

A packer type bridge plug for use in wells which may be set upon a wireline and retrieved upon a tubing string.

대표청구항 ▼

1. A retrievable well tool for use in well bores, said retrievable well tool comprising: a mandrel having at least one shaped recess in one end thereof, a ratchet thread on a portion thereof, and a plurality of lugs on a portion of the exterior thereof; a cap slidably disposed on the mandrel; a

1. A retrievable well tool for use in well bores, said retrievable well tool comprising: a mandrel having at least one shaped recess in one end thereof, a ratchet thread on a portion thereof, and a plurality of lugs on a portion of the exterior thereof; a cap slidably disposed on the mandrel; a packer mandrel having a portion thereof adapted to releasably engage the ratchet thread on the mandrel, the packer mandrel being disposed about the mandrel; a packer element disposed about the packer mandrel, the packer element adapted to releasably, resiliently engage said well bore; a packer mandrel case disposed about a portion of the packer mandrel and the mandrel; an upper wedge member disposed about the mandrel and having a plurality of shaped recesses in one end thereof which releasably engage the plurality of lugs of the mandrel and a frusto-conical surface on a portion of the exterior thereof; a lower wedge member disposed about the mandrel having a frusto-conical surface on a portion of the exterior thereof; and a slip retainer disposed about the mandrel having a plurality of slips retained thereon, some of which slips slidably engage the frusto-conical surface of the upper wedge member and some of which slips slidably engage the frusto-conical surface on the lower wedge member. 2. The well tool of claim 1 wherein the mandrel comprises: a J-slot mandrel having at least one shaped recess therein, a bore through a portion thereof and at least one aperture therethrough intersecting the bore; an upper mandrel connected to the J-slot mandrel; a center mandrel connected to the upper mandrel having a ratchet thread on a portion thereof; and a lower mandrel connected to the center mandrel having at least one lug thereon. 3. The well tool of claim 1 further comprising: a release sleeve valve releasably, slidably retained on the mandrel. 4. The well tool of claim 3 wherein the packer mandrel comprises: an elongated annular member having at least one aperture therein and at least one ratchet block resiliently retained within the aperture adapted to releasably, threadedly engage the ratchet thread on the mandrel. 5. The well tool of claim 4 wherein the tool further comprises: a J-slot case connected to the packer mandrel case and the upper wedge member. 6. The well tool of claim 5 further comprising: a bottom coupling connected to one end of the center mandrel. 7. The well tool of claim 6 further comprising: an adapter having a first bore through a portion thereof and a second bore through another portion thereof; and a tension stud having a portion thereof connected to the adapter and another portion connected to the J-slot mandrel. 8. The well tool of claim 8 wherein the setting sleeve comprises: an elongated annular member. 9. The well tool of claim 7 further including: at least one shear pin to releasably retain the mandrel and the upper wedge member in a first position with respect to each other. 10. The well tool of claim 7 further comprising: a setting sleeve adapted for use when setting said well tool in said well bores. 11. The well tool of claim 10 comprising: a retrieving tool adapted for use in retrieving said well tool from said well bores. 12. The well tool of claim 11 further comprising: a bypass for bypassing fluids in said well bores around the packer elements when running or retrieving said well tool in said well bores. 13. The well tool of claim 12 wherein the packer mandrel case includes: at least one longitudinal passageway in the interior thereof. 14. The well tool of claim 13 wherein the packer mandrel includes: at least one lug thereon which slidably mates with the longitudinal passageway in the interior of the packer mandrel case. 15. The well tool of claim 11 wherein the retrieving tool comprises: an elongated annular member having at least one lug therein adapted to releasably engage the shaped recess in the mandrel. 16. A retrievable bridge plug for use in well bores, said retrievable well tool comprising: a mandrel having at least one shaped recess in one end thereof, a ratchet thread on a portion thereof, and a plurality of lugs on a portion of the exterior thereof; a cap slidably disposed on the mandrel; a packer mandrel having a portion thereof adapted to releasably engage the ratchet thread on the mandrel, the packer mandrel being disposed about the mandrel; a packer element disposed about the packer mandrel, the packer element adapted to releasably, resiliently engage said well bore; a packer mandrel case disposed about a portion of the packer mandrel and the mandrel; an upper wedge member disposed about the mandrel and having a plurality of shaped recesses in one end thereof which releasably engage the plurality of lugs of the mandrel and a frusto-conical surface on a portion of the exterior thereof; a lower wedge member disposed about the mandrel having a frusto-conical surface on a portion of the exterior thereof; and a slip retainer disposed about the mandrel having a plurality of slips retained thereon, some of which slips slidably engage the frusto-conical surface of the upper wedge member and some of which slips slidably engage the frusto-conical surface on the lower wedge member. 17. The retrievable bridge plug of claim 16 wherein the mandrel comprises: a J-slot mandrel having at least one shaped recess therein, a bore through a portion thereof and at least one aperture therethrough intersecting the bore; an upper mandrel connected to the J-slot mandrel; a center mandrel connected to the upper mandrel having a ratchet thread on a portion thereof; and a lower mandrel connected to the center mandrel having at least one lug thereon. 18. The well tool of claim 16 further comprising: a release sleeve valve releasably, slidably retained on the mandrel; a J-slot case connected to the packer mandrel case and the upper wedge member; a bottom coupling connected to one end of the center mandrel; an adapter having a first bore through a portion thereof and a second bore through another portion thereof; and a tension stud having a portion thereof connected to the adapter and another portion connected to the J-slot mandrel. 19. The retrievable bridge plug of claim 18 further comprising: a bypass for bypassing fluids in said well bores around the packer elements when running or retrieving said well tool in said well bores. 20. A retrievable bridge plug for use in well bores, said retrievable well tool comprising: a mandrel having at least one shaped recess in one end thereof, a ratchet thread on a portion thereof, and a plurality of lugs on a portion of the exterior thereof; a cap slidably disposed on the mandrel; a packer mandrel having a portion thereof adapted to releasably engage the ratchet thread on the mandrel, the packer mandrel being disposed about the mandrel; a packer element disposed about the packer mandrel, the packer element adapted to releasably, resiliently engage said well bore; a packer mandrel case disposed about a portion of the packer mandrel and the mandrel; an upper wedge member disposed about the mandrel and having a plurality of shaped recesses in one end thereof which releasably engage the plurality of lugs of the mandrel and a frusto-conical surface on a portion of the exterior thereof; a lower wedge member disposed about the mandrel having a frusto-conical surface on a portion of the exterior thereof; a slip retainer disposed about the mandrel having a plurality of slips retained thereon, some of which slips slidably engage the frusto-conical surface of the upper wedge member and some of which slips slidably engage the frusto-conical surface on the lower wedge member; a release sleeve valve releasably, slidably retained on the mandrel; a J-slot case connected to the packer mandrel case and the upper wedge member; a bottom coupling connected to one end of the center mandrel; an adapter having a first bore through a portion thereof; a tension stud having a portion thereof connected to the adapter and another portion connected to the J-slot mandrel; a bypass for bypassing fluids in said well bores around the packer elements when running or retrieving said well tool in said well bores.