Patent US3608634A successfully refreshed from Google Patents.
US3608634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic set liner hanger
Assignee: Baker Hughes Holdings LLC
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Filing: 1970-03-19
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Granted: 1971-09-28
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Expires: 1990-03-19
Abstract
Abstract A liner hanger employing a hydraulically actuated setting tool structure which is removable substantially entirely after setting of the hanger leaving a minimal amount of hanger structure in the well. A dog-type latch provides an improved releasable connection between the setting tool and the hanger and a reset spring is provided in the event of premature setting of the hanger to enable release of the hanger for movement to the desired location.
Inventors
- 👤 Chudleigh B Cochran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:18
CPC Classifications
E; E21; E21B; E21B23/00; E21B23/06; E21B23/04; E21B23/0411; E21B23/04115; E21B23/042; E21B43/00; E21B43/02; E21B43/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
192 words
A liner hanger, comprising, a. a tubular body connectable to a liner; b. upwardly and outwardly tapering expander surfaces on the body; c. a cage member slidable longitudinally on the body; d. pipe-gripping slips carried by the cage member cooperating with said expander surfaces for radial movement into and out of gripping engagement with a surrounding well pipe in response to longitudinal movement of said cage member relative to said body; e. a tubular setting sleeve secured to the upper end of said cage member; f. a setting tool including a tubular mandrel extending through the bores of said sleeve and of said body and connectable to an operating pipe string; g. cooperating means connecting said mandrel to said body and releasable therefrom by right-hand rotation of the mandrel relative to the body; h. a fluid pressure-actuated latching collar longitudinally slidable on the mandrel; i. releasable latch means initially securing said collar to said setting sleeve and releasable therefrom in response to relative longitudinal movement of said mandrel; j. means resiliently urging said collar downwardly on said mandrel; and k. means in said mandrel for directing operating pressure fluid to said collar.
Claim 2
Dependent Claim
192 words
A liner hanger, comprising, a. a tubular body connectable to a liner; b. upwardly and outwardly tapering expander surfaces on the body; c. a cage member slidable longitudinally on the body; d. pipe-gripping slips carried by the cage member cooperating with said expander surfaces for radial movement into and out of gripping engagement with a surrounding well pipe in response to longitudinal movement of said cage member relative to said body; e. a tubular setting sleeve secured to the upper end of said cage member; f. a setting tool including a tubular mandrel extending through the bores of said sleeve and of said body and connectable to an operating pipe string; g. cooperating means connecting said mandrel to said body and releasable therefrom by right-hand rotation of the mandrel relative to the body; h. a fluid pressure-actuated latching collar longitudinally slidable on the mandrel; i. releasable latch means initially securing said collar to said setting sleeve and releasable therefrom in response to relative longitudinal movement of said mandrel; j. means resiliently urging said collar downwardly on said mandrel; and k. means in said mandrel for directing operating pressure fluid to said collar.
Claim 3
Dependent Claim
26 words
A liner hanger according to claim 1, wherein said expander surfaces are of stepped configuration; and wherein said slips have stepped inner surfaces of complementary configuration.
Claim 4
Dependent Claim
44 words
A liner hanger according to claim 1, wherein said cage member comprises a ring to which said slips are pendently supported by flexible arm means, and wherein a keeper collar is mounted on said body to slidably receive the free ends of said slips.
Claim 5
Dependent Claim
40 words
A liner hanger according to claim 1, wherein said cooperating means comprises: a. a nut having external left-hand threads splined for longitudinal nonrotative movement on said mandrel; and b. a section of complementary threads in the bore of said body.
Claim 6
Dependent Claim
33 words
A liner hanger according to claim 1, wherein said latching collar carries longitudinally spaced seals defining a cylinder surrounding said mandrel; and ports through the wall of said mandrel communicating with said cylinder.
Claim 7
Dependent Claim
89 words
A liner hanger according to claim 1, wherein said releasable latch means comprises: a. a tubular cage secured to said collar and extending concentrically into the upper end of said setting sleeve; b. latch dogs mounted in the wall of said cage for radial movement into and out of latching engagement with said setting sleeve; and c. a latching sleeve mounted in the bore of the cage releasably secured therein to initially hold said dogs in said latching engagement and releasable by said relative longitudinal movement of said mandrel.
Claim 8
Dependent Claim
151 words
A liner hanger, comprising: a. a tubular body connectable to a liner; b. upwardly and outwardly tapering expander surfaces on said body, each of said expander surfaces having a stepped configuration comprising at least two successive steps; c. a cage member slidable longitudinally on the body; d. pipe gripping slips carried by the cage member having stepped tapered inner surfaces complementary to and cooperating with said expander surfaces for radial movement into and out of gripping engagement with a surrounding well pipe in responsE to longitudinal movement of said cage member relative to said body; and e. setting means cooperating with said cage member for effecting said relative longitudinal movement thereof; said setting means including: i. a tubular mandrel extending through said body and connectable to an operating pipe string; ii. a setting collar slidably mounted on said mandrel; and iii. latch means releasably connecting said collar to said cage member.
Claim 9
Dependent Claim
151 words
A liner hanger, comprising: a. a tubular body connectable to a liner; b. upwardly and outwardly tapering expander surfaces on said body, each of said expander surfaces having a stepped configuration comprising at least two successive steps; c. a cage member slidable longitudinally on the body; d. pipe gripping slips carried by the cage member having stepped tapered inner surfaces complementary to and cooperating with said expander surfaces for radial movement into and out of gripping engagement with a surrounding well pipe in responsE to longitudinal movement of said cage member relative to said body; and e. setting means cooperating with said cage member for effecting said relative longitudinal movement thereof; said setting means including: i. a tubular mandrel extending through said body and connectable to an operating pipe string; ii. a setting collar slidably mounted on said mandrel; and iii. latch means releasably connecting said collar to said cage member.
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) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |