Patent US3591125A successfully refreshed from Google Patents.
US3591125A
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US
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Multiple-section well blowout preventer packer
Assignee: Hydril LLC
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Filing: 1968-10-14
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Granted: 1971-07-06
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Expires: 1988-10-14
Abstract
Abstract The disclosure concerns a well blowout preventer packer that includes multiple elastomer body sections formed to be arranged in side-by-side circular series relation for coaction to seal off a well in response to simultaneous constriction.
Inventors
- 👤 George E Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:23
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/06
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
97 words
In a well blowout preventer, the combination comprising: a circular series of elastomer body sections defining a central opening and having outwardly presented faces to receive constricting force transmission and inwardly presented faces inwardly deformable to reduce the size of said opening in response to said force transmission, said sections each having opposite side faces through which compressive force is transmitted between the sections during said constricting force transmission, and there being interfitting shoulder means on adjacent sections for blocking relative displacement of said adjacent sections during inward deformation thereof in response to said constricting force transmission.
Claim 2
Dependent Claim
97 words
In a well blowout preventer, the combination comprising: a circular series of elastomer body sections defining a central opening and having outwardly presented faces to receive constricting force transmission and inwardly presented faces inwardly deformable to reduce the size of said opening in response to said force transmission, said sections each having opposite side faces through which compressive force is transmitted between the sections during said constricting force transmission, and there being interfitting shoulder means on adjacent sections for blocking relative displacement of said adjacent sections during inward deformation thereof in response to said constricting force transmission.
Claim 3
Dependent Claim
13 words
The combination of claim 1 including rigid anchor members extending in said sections.
Claim 4
Dependent Claim
16 words
The combination of claim 2 wherein the anchor members in adjacent sections are everywhere spaced apart.
Claim 5
Dependent Claim
46 words
The combination of claim 3 wherein said opening has a central vertical axis, and each anchor member comprises upper and lower plates and ribbing interconnecting the plates and extending within the body section in spaced relation to and approximately midway between the section opposite side faces.
Claim 6
Dependent Claim
17 words
The combination of claim 4 wherein said opposite side faces of each section taper toward said opening.
Claim 7
Dependent Claim
21 words
The combination of claim 2 including blowout preventer means carrying said sections for bodily movement toward and away from said opening.
Claim 8
Dependent Claim
22 words
The combination of claim 1 wherein said sections define a central axis and said side faces extend in generally axial radial planes.
Claim 9
Dependent Claim
40 words
The combination of claim 1 in which said shoulder means are defined by a protrusion at the side face of one section and a recess sunk in the side face of the adjacent section, said protrusion received in said recess.
Claim 10
Dependent Claim
82 words
In a well blowout preventer, the combination comprising: a. a circular series of elastomer body sections defining a central opening and having outwardly presented faces to receive constricting force transmission and inwardly presented faces inwardly deformable to reduce the size of said opening in response to said force transmission, and b. said sections each having opposite side faces through which compressive force is transmitted between the sections during said constricting force transmission, c. the opposed faces of adjacent sections being bonded together.
Claim 11
Dependent Claim
82 words
In a well blowout preventer, the combination comprising: a. a circular series of elastomer body sections defining a central opening and having outwardly presented faces to receive constricting force transmission and inwardly presented faces inwardly deformable to reduce the size of said opening in response to said force transmission, and b. said sections each having opposite side faces through which compressive force is transmitted between the sections during said constricting force transmission, c. the opposed faces of adjacent sections being bonded together.
Claim 12
Dependent Claim
40 words
The combination of claim 9 including interfitting shoulder means on the sections proximate the bonded together opposed faces of adjacent sections for blocking relative displacement of such adjacent sections during inward deformation thereof in response to said constricting force transmission.
Claim 13
Dependent Claim
59 words
The combination of claim 9 in which there is a rigid anchor member extending in each section between said inwardly and outwardly presented faces and approximately midway between said opposed side faces, each anchor member including upper and lower plates and ribbing interconnecting said plates and extending within each said section in spaced relation to said opposite sides thereof.
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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) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |