§
Luxuse
Patent Intelligence
Sign In
Patent US4374530A successfully refreshed from Google Patents.
← Back to Patent Explorer
US4374530A Expired / Lapsed US ⏱️ 0.0 years remaining

Flexible production tubing

Assignee: Individual
•
Filing: 1982-02-01
•
Granted: 1983-02-22
•
Expires: 2002-02-01
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract Flexible production tubing is wound about a reel for easy and convenient transport to and from a well site. A submersible pump is attached directly to the end of the flexible tubing and is lowered through the well casing to a producing formation. Insertion and withdrawal of the flexible tubing is accomplished with a hydraulically powered drive sprocket assembly mounted above the well head equipment. The flexible tubing is reinforced by striker plate assemblies which are engaged by the teeth of the drive sprocket, thereby providing positive traction for insertion and withdrawal without damaging the flexible core. The flexible production tubing includes a high strength injection core, a tubular production conduit embedded within the core, and a series of striker plate assemblies partially embedded within the core. Each striker plate assembly has a grooved face, with the plates being axially spaced with respect to each other along the length of the core, whereby the grooves of the striker plates are engaged successively by the teeth of the drive sprocket as the tubing is advanced or retracted.

Inventors

  • 👤 John B. Walling

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-24 18:56
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/20; F; F16; F16L; F16L11/00; F16L11/22; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/6918; Y10T137/6954

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 105 words
A composite, flexible tubing assembly for conveying formation fluid out of a well comprising, in combination: an injection body of high tensile strength, flexible material defining an elongated core; elongated production tubing embedded in said core; and, a plurality of striker plate assemblies partially embedded within said core, each striker plate assembly having an exposed face and a groove in said face extending transverse to the longitudinal axis of said core, said plates being axially spaced with respect to each other along the length of said core whereby the grooves of said striker plates can be engaged successively by the teeth of a drive sprocket.
Claim 2
Dependent Claim 105 words
A composite, flexible tubing assembly for conveying formation fluid out of a well comprising, in combination: an injection body of high tensile strength, flexible material defining an elongated core; elongated production tubing embedded in said core; and, a plurality of striker plate assemblies partially embedded within said core, each striker plate assembly having an exposed face and a groove in said face extending transverse to the longitudinal axis of said core, said plates being axially spaced with respect to each other along the length of said core whereby the grooves of said striker plates can be engaged successively by the teeth of a drive sprocket.
Claim 3
Dependent Claim 16 words
The flexible tubing assembly as defined in claim 1, said elongated production tubing comprising extruded Nylon.
Claim 4
Dependent Claim 16 words
The flexible tubing assembly as defined in claim 1, said elongated production tubing comprising welded steel.
Claim 5
Dependent Claim 21 words
The flexible tubing assembly as defined in claim 1, including a plurality of high tensile strength strands embedded within said core.
Claim 6
Dependent Claim 65 words
The flexible tubing assembly as defined in claim 1, each striker plate assembly including first and second striker plates, a portion of the first striker plate being coupled in hinged engagement with the second striker plate, one of said striker plates having an opening exposing said core, and the other striker plate having a transversely projecting tang extending through said opening and intersecting said core.
Claim 7
Dependent Claim 41 words
The flexible tubing assembly as defined in claim 1, each striker plate assembly including first and second striker plates and male and female fastener members carried by said striker plates, said fastener members intersecting said core and disposed in interlocking engagement.
Claim 8
Dependent Claim 25 words
The flexible tubing assembly as defined in claim 6, wherein said core is rectangular in cross-section, and each striker plate assembly being rectangular in cross-section.
Claim 9
Dependent Claim 25 words
The flexible tubing assembly as defined in claim 6, wherein said core is circular in cross-section, and each striker plate assembly being circular in cross-section.

References Cited (Backward Citations)

US672556A Cited
US2706416A Cited
US2842768A Cited
US3400737A Cited
CA890228A Cited
US3526086A Cited
US3672395A Cited
US4194536A Cited
DE2838577A1 Cited
US4336415A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1986-02-21 1986-08-23 1987-02-22 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1990-02-21 1990-08-23 1991-02-22 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1994-02-21 1994-08-23 1995-02-22 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag