Patent US1705816A successfully refreshed from Google Patents.
US3778089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe coupling
Assignee: Otis Engineering Corp
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Filing: 1971-03-22
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Granted: 1973-12-11
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Expires: 1991-03-22
Abstract
Abstract A pipe coupling for connection of a pair of longitudinally spaced pipe ends without rotation of either of the pipes connected by the well heads with service facilities at the surface or along the ocean floor. The coupling may also connect pipe members to provide a leakproof union allowing rotation of one pipe relative to the other. The coupling includes a first outer pipe section having inner threads and a second inner pipe section having external threads, at least one of such threads being tapered. The pipe sections are joined together by a threaded gland having inner threads mating with the threads on the inner pipe section and external threads mating with the inner threads on the outer pipe section. The gland has an extension projecting over the inner pipe section from the overlapping portions of the two pipe sections for engagement of a tool to turn the gland. One of the threaded connections with the gland stresses the gland sufficiently to tighten the other threaded connection with the gland. One form of coupling employing the invention comprises an extension joint for connecting spaced pipe ends. Another pipe joint embodying the invention permits two pipe sections to be aligned and the connection between them tightened by the gland without rotation of the sections themselves. Additional specific applications of the coupling shown comprise multiple section articulated pipe assemblies which are readily deformable to provide turns both within a given plane and between different planes in a universal joint type manner. The articulated pipe assemblies are especially suited to connection of underwater wee heads with service facilities at the surface or along the ocean floor. Additional specific applicatins of th coupling shwwn comprise multiple section articulated pipe assemblies which are readily deformable to provide turns both within a given plane and between different planes in a universal join type manner. The articulated pipe assemblies are especially suited to connection of underwater well heads with service facilities at the surface or along the ocean floor.
Inventors
- 👤 J Fredd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:08
CPC Classifications
F; F16; F16L; F16L15/00; F16L15/001; F16L15/003; E; E21; E21B; E21B17/00; E21B17/01; E21B17/20; F16L15/006; F16L15/008; F16L27/00; F16L27/08; F16L27/0804; F16L27/0837; F16L27/0841; F16L39/00; F16L39/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
397 words
A coupling for providing a connection between first and second threaded members comprising: a first member having a portion provided with straight external threads; a second member having a portion provided with tapered internal threads; a coupling member between said first and second members, said coupling member having straight internal threads mating with said straight threads on said first member and said coupling member having tapered external threads mating with said tapered internal threads in said second member; the threaded connection between said coupling member and said first member and the threaded connection between said coupling member and said second member being disposed longitudinally in conCentric overlapping relationship; the threaded connection between said coupling member and said second member effecting a radial stress on said coupling member providing a sealing force along the threaded connection between said coupling member and said first member; the finish of said coupling member and said first member along the straight threaded connection between said coupling member and said first member and the tolerance between said straight threads of said coupling member and said first member being related to and the length of such threaded connection being proportional to the operating pressure of fluid within said coupling to permit said first member to be hand-rotated in said coupling member while maintaining a fluid-type connection at said coupling member along said straight threaded connection between said coupling member and said first member under operating pressure; said coupling member being provided with an extension portion projecting beyond said overlapping portions of said first and second members for engagement of a tool on said coupling member for rotating said coupling member for loosening, tightening, and adjusting the effective length of said coupling; said extension portion of said coupling member having a smooth internal bore portion disposed between the outward end of the internal threads along said coupling member and the free end portion of said coupling member providing a grease annulus for receiving grease to lubricate said straight threaded connection between said coupling member and said first member; said coupling member having a grease-fitting opening communicating with said grease annulus for injection of grease into said annulus; and said coupling member having internal threads along said free end portion to seal the outward end of said annulus and to provide structural support for said free end portion of said coupling member along said first member.
Claim 2
Dependent Claim
397 words
A coupling for providing a connection between first and second threaded members comprising: a first member having a portion provided with straight external threads; a second member having a portion provided with tapered internal threads; a coupling member between said first and second members, said coupling member having straight internal threads mating with said straight threads on said first member and said coupling member having tapered external threads mating with said tapered internal threads in said second member; the threaded connection between said coupling member and said first member and the threaded connection between said coupling member and said second member being disposed longitudinally in conCentric overlapping relationship; the threaded connection between said coupling member and said second member effecting a radial stress on said coupling member providing a sealing force along the threaded connection between said coupling member and said first member; the finish of said coupling member and said first member along the straight threaded connection between said coupling member and said first member and the tolerance between said straight threads of said coupling member and said first member being related to and the length of such threaded connection being proportional to the operating pressure of fluid within said coupling to permit said first member to be hand-rotated in said coupling member while maintaining a fluid-type connection at said coupling member along said straight threaded connection between said coupling member and said first member under operating pressure; said coupling member being provided with an extension portion projecting beyond said overlapping portions of said first and second members for engagement of a tool on said coupling member for rotating said coupling member for loosening, tightening, and adjusting the effective length of said coupling; said extension portion of said coupling member having a smooth internal bore portion disposed between the outward end of the internal threads along said coupling member and the free end portion of said coupling member providing a grease annulus for receiving grease to lubricate said straight threaded connection between said coupling member and said first member; said coupling member having a grease-fitting opening communicating with said grease annulus for injection of grease into said annulus; and said coupling member having internal threads along said free end portion to seal the outward end of said annulus and to provide structural support for said free end portion of said coupling member along said first member.
Claim 3
Dependent Claim
361 words
A pipe coupling for connecting two pipes to provide a sealed rotatable joint between said pipes comprising: a first inner pipe section having a portion thereof provided with external straight threads; a second outer pipe section having a portion thereof provided with internal tapered threads; a coupling gland for interconnecting said first and second pipe secions, said coupling gland having internal straight threads formed to mate with said straight threads on said inner pipe secton, said coupling gland having external tapered threads to mate with said internal tapered threads in said outer pipe section; said tapered threads of said gland and said outer pipe section being so related to effect radially inwardly squeezing action on said gland as said gland is threaded into said outer pipe section; said straight threads within said gland and around said inner pipe secton mating along a length proportional to the operating pressure within said pipe coupling to effect a fluid seal between said gland and said inner pipe section to seal against said operating fluid pressure within said coupling when said coupling gland is squeezed by said action of said tapered threads on said coupling gland and within said outer pipe section, said inner pipe section being hand rotatable in said coupling while maintaining said fluid seal for adjusting the effective length of said coupling under said operating fluid pressure; said coupling gland having an extension portion projecting from within said outer pipe section along the external threaded portion of said inner pipe section, said extension portion being provided with a smooth internal bore portion spaced from the outer free end portion of said gland to provide an annular grease chamber around said straight threads on said inner pipe section to contain grease for lubricating said inner pipe section for rotation of said inner pipe section within said gland, said gland having a grease fitting opening to permit injection of grease into said annular grease chamber; and said gland having internal threads along said free end portion for closing the outward end oF said grease chamber and for supporting the free end of said gland on said straight external threads of said inner pipe section.
Claim 4
Dependent Claim
361 words
A pipe coupling for connecting two pipes to provide a sealed rotatable joint between said pipes comprising: a first inner pipe section having a portion thereof provided with external straight threads; a second outer pipe section having a portion thereof provided with internal tapered threads; a coupling gland for interconnecting said first and second pipe secions, said coupling gland having internal straight threads formed to mate with said straight threads on said inner pipe secton, said coupling gland having external tapered threads to mate with said internal tapered threads in said outer pipe section; said tapered threads of said gland and said outer pipe section being so related to effect radially inwardly squeezing action on said gland as said gland is threaded into said outer pipe section; said straight threads within said gland and around said inner pipe secton mating along a length proportional to the operating pressure within said pipe coupling to effect a fluid seal between said gland and said inner pipe section to seal against said operating fluid pressure within said coupling when said coupling gland is squeezed by said action of said tapered threads on said coupling gland and within said outer pipe section, said inner pipe section being hand rotatable in said coupling while maintaining said fluid seal for adjusting the effective length of said coupling under said operating fluid pressure; said coupling gland having an extension portion projecting from within said outer pipe section along the external threaded portion of said inner pipe section, said extension portion being provided with a smooth internal bore portion spaced from the outer free end portion of said gland to provide an annular grease chamber around said straight threads on said inner pipe section to contain grease for lubricating said inner pipe section for rotation of said inner pipe section within said gland, said gland having a grease fitting opening to permit injection of grease into said annular grease chamber; and said gland having internal threads along said free end portion for closing the outward end oF said grease chamber and for supporting the free end of said gland on said straight external threads of said inner pipe section.
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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) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |