Patent US3764168A successfully refreshed from Google Patents.
US3764168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling expansion joint apparatus
Assignee: Schlumberger Technology Corp
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Filing: 1971-10-12
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Granted: 1973-10-09
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Expires: 1991-10-12
Abstract
Abstract In accordance with an illustrative embodiment of the present invention, a slip or expansion joint for use in a drill string includes a mandrel telescopically disposed within a housing with splines to prevent relative rotation. The housing includes a bottom sub having attached thereto a tube extending upwardly in spaced relation to the adjacent housing section to provide an annular cavity that is placed in communication with the well annulus by ports. A seal assembly is mounted on the upper end of the tube and seals against the lower portion of said mandrel which is slidably received in said tube.
Inventors
- 👤 J Kisling
- 👤 D Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:57
CPC Classifications
F; F16; F16D; F16D3/00; F16D3/02; F16D3/06; E; E21; E21B; E21B17/00; E21B17/02; E21B17/04; E21B17/07
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
102 words
Apparatus for use in a well bore, comprising: an inner member telescopically disposed within an outer member; means for preventing relative rotation of said members; a tube connected to a lower section of said outer member and extending upwardly inside said outer member, a portion of said inner member being slidably received within said tube; said tube and outer member being laterally spaced to define an annular chamber; means for communicating the lower end portion of said chamber with the well bore externally of said outer member; and coengageable means on said inner member portion and said tube for preventing fluid leakage.
Claim 2
Dependent Claim
102 words
Apparatus for use in a well bore, comprising: an inner member telescopically disposed within an outer member; means for preventing relative rotation of said members; a tube connected to a lower section of said outer member and extending upwardly inside said outer member, a portion of said inner member being slidably received within said tube; said tube and outer member being laterally spaced to define an annular chamber; means for communicating the lower end portion of said chamber with the well bore externally of said outer member; and coengageable means on said inner member portion and said tube for preventing fluid leakage.
Claim 3
Dependent Claim
37 words
The apparatus of claim 1 wherein said coengageable means includes a seal assembly mounted to the upper end of said tube and having seal elements in sealing contact with the outer periphery of said inner member portion.
Claim 4
Dependent Claim
44 words
The apparatus of claim 1 wherein said outer member is formed in parts that can be separated at a location adjacent the lower end of said tube, said lower end of said tube being releasably attached to the lowermost one of the separable parts.
Claim 5
Dependent Claim
28 words
The apparatus of claim 3 further including means for fixing said inner and outer members together for joint movement with respect to said tube and said lowermost part.
Claim 6
Dependent Claim
31 words
The apparatus of claim 1 further including stabilizing means between said inner and outer members located above said seal means for maintaining said members in concentric disposition during telescoping movement thereof.
Claim 7
Dependent Claim
143 words
An expansion or slip joint apparatus for use in a drill string disposed in a well bore, comprising: an upper inner member telescopically disposed within a lower outer member and coupled for limited longitudinal movement; spline means for preventing relative rotation of said members; said outer member constituted by threadedly coupled sections including a bottom sub; a tube Located inside said outer member and having its lower end attached to said bottom sub and extending upwardly therefrom in laterally spaced relation to the adjacent section of said outer member, said spaced relation providing an annular chamber, the lower portion of said inner member being slidably received within the bore of said tube; port means for providing fluid communication between said chamber and the well bore externally of said outer member; and seal means on said tube and lower portion for preventing fluid leakage.
Claim 8
Dependent Claim
143 words
An expansion or slip joint apparatus for use in a drill string disposed in a well bore, comprising: an upper inner member telescopically disposed within a lower outer member and coupled for limited longitudinal movement; spline means for preventing relative rotation of said members; said outer member constituted by threadedly coupled sections including a bottom sub; a tube Located inside said outer member and having its lower end attached to said bottom sub and extending upwardly therefrom in laterally spaced relation to the adjacent section of said outer member, said spaced relation providing an annular chamber, the lower portion of said inner member being slidably received within the bore of said tube; port means for providing fluid communication between said chamber and the well bore externally of said outer member; and seal means on said tube and lower portion for preventing fluid leakage.
Claim 9
Dependent Claim
24 words
The apparatus of claim 6 wherein said port means extends through the wall of said outer member near the lower end of said chamber.
Claim 10
Dependent Claim
29 words
The apparatus of claim 6 wherein said seal means is mounted at the upper end of said tube and includes seal elements in sliding contact with said lower portion.
Claim 11
Dependent Claim
57 words
The apparatus of claim 8 including means operable from the exterior of said outer member for locking said members together, whereby release of the threaded connection for said bottom sub enables said members to move jointly upwardly with respect to said bottom sub and said tube to expose said tube and said seal assembly for maintenance procedures.
Claim 12
Dependent Claim
30 words
The apparatus of claim 6 further including wiper means mounted between said members above said spline means, said wiper means including portions projecting between the splines of said spline means.
Claim 13
Dependent Claim
33 words
The apparatus of claim 6 further including stabilizing means between said inner and outer members above the upper end of said tube to maintain a concentric disposition of said member during telescoping motion.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |