US3603388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retrievable well packer
Assignee: Camco Inc
•
Filing: 1970-02-04
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Granted: 1971-09-07
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Expires: 1990-02-04
Abstract
Abstract A longitudinally releasably retrievable well packer with a packing seal member surrounding a mandrel having a body slidably engaging the mandrel and a housing slidable relative to the body and the mandrel with releasable engaging means between the housing and the mandrel, and a longitudinally actuated releasable locking means connected to the housing for unlocking and locking the releasable engaging means and coacting means between the body and the locking means for actuating the locking means thereby providing a packer release assembly unaffected by packer seal tightness or upward forces on the tubing below the packer which allows tandem packers to be released one at a time. A shearpin movable in an annular and a longitudinal slot between the body and the housing for releasing the packer by an upward force or by a combination of rotation and upward force. A key and an elongated longitudinal keyway between the body and the housing allowing longitudinal movement therebetween and a key and an elongated longitudinal keyway between the housing and the mandrel allowing longitudinal movement therebetween for transmitting rotational and longitudinal movement to the mandrel after releasing the packer. An integral circulation valve which can be opened and closed by a tubing manipulation after the packer is set without releasing the packer.
Inventors
- 👤 James H Current
- 👤 Harry C Ehlert
- 👤 Marion D Kilgore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:03
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/129; E21B33/1295; E21B33/1294
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
136 words
In a well packer adapted to be set in a conduit disposed in a well bore having a mandrel, an initially retracted packing seal means, slip means surrounding said mandrel, and means for expanding the slip means and the packing seal means into engagement with the conduit, the improvement in a releasing assembly comprising: a body adapted to be connected to a well tubing and slidably engaging the upper end of the mandrel, a housing longitudinally slidable relative to the body and the mandrel and abutting the packing seal means, releasable engaging means connected between the housing and the mandrel, releasable locking means connected to the housing for locking and releasing the releasable engaging means, and coacting means between the body and the releasable locking means for releasing the locking means for releasing the engaging means.
Claim 2
Dependent Claim
136 words
In a well packer adapted to be set in a conduit disposed in a well bore having a mandrel, an initially retracted packing seal means, slip means surrounding said mandrel, and means for expanding the slip means and the packing seal means into engagement with the conduit, the improvement in a releasing assembly comprising: a body adapted to be connected to a well tubing and slidably engaging the upper end of the mandrel, a housing longitudinally slidable relative to the body and the mandrel and abutting the packing seal means, releasable engaging means connected between the housing and the mandrel, releasable locking means connected to the housing for locking and releasing the releasable engaging means, and coacting means between the body and the releasable locking means for releasing the locking means for releasing the engaging means.
Claim 3
Dependent Claim
35 words
The apparatus of claim 1 including, coacting shoulder means between the body and the housing for retracting the housing from the packing seal means upon a predetermined longitudinal movement between the body and the housing.
Claim 4
Dependent Claim
21 words
The apparatus of claim 1 including, shear means between the body and the housing initially holding the body and housing together.
Claim 5
Dependent Claim
88 words
The apparatus of claim 1 including, a fluid bypass in the body normally positioned below the top of the mandrel, seal means between the body and the mandrel above the bypass, shear means in one of the body and the housing, and a longitudinal slot in the other of the body and housing for slidably receiving the shear means, said slot being of a sufficient length to allow movement of the body relative to the mandrel to move the bypass above the mandrel without shearing the shear means.
Claim 6
Dependent Claim
77 words
The apparatus of claim 1 including, pin means on one of the body and the housing, an annular slot and a longitudinal slot in communication with the annular slot, both slots in the other of the body and the housing for slidably receiving the pin means, said longitudinal slot being of a sufficient length for allowing mating of the coacting means for releasing the locking means before the pin reaches the lower end of the longitudinal slot.
Claim 7
Dependent Claim
26 words
The apparatus of claim 5 including, shear means in one of the body and the housing initially preventing movement of the pin in the annular slot.
Claim 8
Dependent Claim
24 words
The apparatus of claim 1 including, coacting means between the body and the locking means for reengaging the locking means with the engaging means.
Claim 9
Dependent Claim
29 words
The apparatus of claim 7 including, a key and longitudinal keyway between the body and the housing allowing release of the packing seal means without longitudinally moving the mandrel.
Claim 10
Dependent Claim
34 words
The apparatus of claim 7 including, a key and longitudinal keyway between the body and the housing, a key and longitudinal keyway between the housing and the mandrel for transmitting motion to the mandrel.
Claim 11
Dependent Claim
159 words
In a well packer adapted to be set in a conduit disposed in a well bore having a mandrel, the lower end of which is adapted to be connected to a well tubing, an initially retracted packing seal means and slip means surrounding said mandrel, means for expanding the slip means and the packing seal means into engagement with the conduit, the improvement in a releasing assembly comprising, a body adapted to be connected to a well tubing and slidably engaging the upper end of the mandrel, a housing longitudinally slidable relative to the body and the mandrel and abutting the packing seal means, releasable engaging means connected between the housing and the mandrel for preventing longitudinal movement therebetween when engaged, longitudinally actuated releasable locking means connected to the housing for locking and releasing the releasable engaging means, and coacting means between the body and the releasable locking means for releasing the locking means for releasing the engaging means.
Claim 12
Dependent Claim
159 words
In a well packer adapted to be set in a conduit disposed in a well bore having a mandrel, the lower end of which is adapted to be connected to a well tubing, an initially retracted packing seal means and slip means surrounding said mandrel, means for expanding the slip means and the packing seal means into engagement with the conduit, the improvement in a releasing assembly comprising, a body adapted to be connected to a well tubing and slidably engaging the upper end of the mandrel, a housing longitudinally slidable relative to the body and the mandrel and abutting the packing seal means, releasable engaging means connected between the housing and the mandrel for preventing longitudinal movement therebetween when engaged, longitudinally actuated releasable locking means connected to the housing for locking and releasing the releasable engaging means, and coacting means between the body and the releasable locking means for releasing the locking means for releasing the engaging means.
Claim 13
Dependent Claim
74 words
The appaRatus of claim 10 including, shearpin means on one of the body and the housing, an annular slot and a longitudinal slot in communication with the annular slot, both slots in the other of the body and the housing for slidably receiving the shearpin, said longitudinal slot being of a sufficient length for allowing mating of the coacting means for releasing the locking means before the shearpin is sheared in the longitudinal slot.
Claim 14
Dependent Claim
36 words
The apparatus of claim 10 including, a key and longitudinal keyway between the body and the housing allowing longitudinal movement therebetween, a key and longitudinal keyway between the housing and the mandrel allowing longitudinal movement therebetween.
Claim 15
Dependent Claim
24 words
The apparatus of claim 12 including, coacting means between the body and the locking means for reengaging the locking means with the engaging means.
Claim 16
Dependent Claim
21 words
The apparatus of claim 13 including, shear means between the body and the housing initially holding the body and housing together.
Claim 17
Dependent Claim
216 words
In a well packer adapted to set in a conduit disposed in a well bore having a mandrel the lower end of which is adapted to be connected to a well tubing, an initially retracted packing seal means surrounding the mandrel, slip means surrounding said mandrel, means for extending the slip means and the packing seal means into engagement with the conduit, the improvement in a releasing assembly comprising, a body adapted to be connected to a well tubing and longitudinally slidably engaging the upper end of the mandrel, a housing longitudinally slidable relative to the body and the mandrel and abutting the packing seal means, ratchet engaging means connected between the housing and the mandrel for preventing longitudinal movement between the body and the mandrel when engaged, longitudinally actuated wedge lock initially connected to the housing by a shearpin and initially locking the ratchet engaging means in engagement, shoulder means between the body and the wedge lock for longitudinally releasing the wedge lock thereby unlocking the ratchet means, a key and longitudinal keyway between the body and housing allowing longitudinal movement therebetween, and a key and longitudinal keyway between the housing and the mandrel allowing longitudinal movements therebetween for releasing the packer but allowing both rotational and longitudinal movement to be transmitted below the packer.
Claim 18
Dependent Claim
216 words
In a well packer adapted to set in a conduit disposed in a well bore having a mandrel the lower end of which is adapted to be connected to a well tubing, an initially retracted packing seal means surrounding the mandrel, slip means surrounding said mandrel, means for extending the slip means and the packing seal means into engagement with the conduit, the improvement in a releasing assembly comprising, a body adapted to be connected to a well tubing and longitudinally slidably engaging the upper end of the mandrel, a housing longitudinally slidable relative to the body and the mandrel and abutting the packing seal means, ratchet engaging means connected between the housing and the mandrel for preventing longitudinal movement between the body and the mandrel when engaged, longitudinally actuated wedge lock initially connected to the housing by a shearpin and initially locking the ratchet engaging means in engagement, shoulder means between the body and the wedge lock for longitudinally releasing the wedge lock thereby unlocking the ratchet means, a key and longitudinal keyway between the body and housing allowing longitudinal movement therebetween, and a key and longitudinal keyway between the housing and the mandrel allowing longitudinal movements therebetween for releasing the packer but allowing both rotational and longitudinal movement to be transmitted below the packer.
Claim 19
Dependent Claim
30 words
The apparatus of claim 15 including, shoulder means between the body and the wedge lock for providing longitudinal downward movement to the wedge lock for reengaging the ratchet engaging means.
Claim 20
Dependent Claim
98 words
The apparatus of claim 15 including, second shearpin means on one of the body and the housing, an annular slot and a longitudinal slot in communication with the annular slot, both slots in the other of the body and the housing for slidably receiving the second shearpin, said longitudinal slot being of a sufficient length for allowing release of the wedge lock from the ratchet means without shearing the second shearpin in the longitudinal slot, third shearpin means in one of the body and the housing initially preventing movement of the second shear means in the annular slot.
Claim 21
Dependent Claim
208 words
In a well packer adapted to be set in a conduit disposed in a well bore having a mandrel, an initially retracted packing seal means and slip means surrounding said mandrel, means for expanding the slip means and the packing seal means into engagement with the conduit, the improvement in a bypass valve assembly comprising, a body adapted to be connected to a well tubing and slidably engaging the upper end of the mandrel, a housing longitudinally slidable relative to the body and the mandrel, a fluid bypass in the body normally positioned below the top of the mandrel, seal means between the body and the mandrel above the bypass, a first shear means in one of the body and the housing, an annular slot and a longitudinal slot in communication witH the annular slot, both slots in the other of the body and the housing for slidably receiving the first shear means, said longitudinal slot being of a sufficient length to allow movement of the body relative to the mandrel to move the bypass above the mandrel without shearing the first shear means, second shear means in the one of the body and the housing initially preventing movement of the first shear means in the annular slot.
Claim 22
Dependent Claim
208 words
In a well packer adapted to be set in a conduit disposed in a well bore having a mandrel, an initially retracted packing seal means and slip means surrounding said mandrel, means for expanding the slip means and the packing seal means into engagement with the conduit, the improvement in a bypass valve assembly comprising, a body adapted to be connected to a well tubing and slidably engaging the upper end of the mandrel, a housing longitudinally slidable relative to the body and the mandrel, a fluid bypass in the body normally positioned below the top of the mandrel, seal means between the body and the mandrel above the bypass, a first shear means in one of the body and the housing, an annular slot and a longitudinal slot in communication witH the annular slot, both slots in the other of the body and the housing for slidably receiving the first shear means, said longitudinal slot being of a sufficient length to allow movement of the body relative to the mandrel to move the bypass above the mandrel without shearing the first shear means, second shear means in the one of the body and the housing initially preventing movement of the first shear means in the annular slot.
Claim 23
Dependent Claim
46 words
The apparatus of claim 18 including, a key and longitudinal keyway between the body and the housing, said keyway being of a width such that when the key is positioned against one side of the keyway, the first shear means is aligned with the longitudinal slot.
Claim 24
Dependent Claim
256 words
In a well packer adapted to be set in a conduit for closing a well bore having a mandrel, an initially retracted packing seal means surrounding said mandrel, slip means surrounding and connected to the lower end of said mandrel and positioned below said packing seal means, hydraulically actuated packer seal expanding means surrounding the mandrel for expanding said seal means into engagement with said conduit, one-way clutch means between the mandrel and said seal-expanding means allowing one-way movement of the seal-expanding means in a direction to expand the seal means, hydraulically actuated slip-expanding means surrounding said mandrel and a portion of the seal-expanding means, one-way clutch means between the slip-expanding means and said seal-expanding means allowing one-way movement of the seal-expanding means in a direction to expand the slip means, coacting shoulders between the seal-expanding means and the slip-expanding means positioned so that when the seal-expanding means is lifted sufficiently the shoulders will contact and the slip-expanding means will disengage the slip means, the improvement in a releasing assembly comprising, a body adapted to be connected to a well tubing and longitudinally slidably engaging the upper end of the mandrel, a housing longitudinally slidable relative to the body and the mandrel and abutting the packing seal means, releasable engaging means connected between the housing and the mandrel, longitudinally actuated releasable locking means connected to the housing for locking and releasing the releasable engaging means, and coacting means between the body and the releasable locking means for releasing the locking means for releasing the engaging means.
Claim 25
Dependent Claim
256 words
In a well packer adapted to be set in a conduit for closing a well bore having a mandrel, an initially retracted packing seal means surrounding said mandrel, slip means surrounding and connected to the lower end of said mandrel and positioned below said packing seal means, hydraulically actuated packer seal expanding means surrounding the mandrel for expanding said seal means into engagement with said conduit, one-way clutch means between the mandrel and said seal-expanding means allowing one-way movement of the seal-expanding means in a direction to expand the seal means, hydraulically actuated slip-expanding means surrounding said mandrel and a portion of the seal-expanding means, one-way clutch means between the slip-expanding means and said seal-expanding means allowing one-way movement of the seal-expanding means in a direction to expand the slip means, coacting shoulders between the seal-expanding means and the slip-expanding means positioned so that when the seal-expanding means is lifted sufficiently the shoulders will contact and the slip-expanding means will disengage the slip means, the improvement in a releasing assembly comprising, a body adapted to be connected to a well tubing and longitudinally slidably engaging the upper end of the mandrel, a housing longitudinally slidable relative to the body and the mandrel and abutting the packing seal means, releasable engaging means connected between the housing and the mandrel, longitudinally actuated releasable locking means connected to the housing for locking and releasing the releasable engaging means, and coacting means between the body and the releasable locking means for releasing the locking means for releasing the engaging means.
Claim 26
Dependent Claim
88 words
The apparatus of claim 20 including, a fluid bypass in the body normally positioned below the top of the mandrel, seal means between the body and the mandrel above the bypass, shear means in one of the body and the housing, and a longitudinal slot in the other of the body and housing for slidably receiving the shear means, said slot being of a sufficient length to allow movement of the body relative to the mandrel to move the bypass above the mandrel without shearing the shear means.
Claim 27
Dependent Claim
36 words
The apparatus of claim 20 including, a key and longitudinal keyway between the body and the housing allowing longitudinal movement therebetween, a key and longitudinal keyway between the housing and the mandrel allowing longitudinal movement therebetween.
Claim 28
Dependent Claim
24 words
The apparatus of claim 22 including, coacting means between the body and the locking means for reengaging the locking means with the engaging means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-06 | 1975-03-08 | 1975-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-06 | 1979-03-08 | 1979-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-06 | 1983-03-08 | 1983-09-07 | $7700.00 | Window Closed / Lapsed |