Patent US3933203A successfully refreshed from Google Patents.
US3933203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centralizer for production string including support means for control lines
Assignee: Individual
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Filing: 1975-03-27
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Granted: 1976-01-20
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Expires: 1995-03-27
Abstract
Abstract An elastomer centralizer for a production string includes an elastomer body having a central opening extending longitudinally therethrough and a split in the body with the split extending to the opening in the body. A plurality of circumferentially spaced longitudinally extending projections are integrally formed on the body for positioning a production string within a well casing and an annular rib extends between predetermined pairs of the longitudinal projections with openings therein to provide an arrangement for supporting control lines extending from the earth's surface downwardly into the well bore.
Inventors
- 👤 Orde R. Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:54
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/10; E21B17/1014; E21B17/1035; E21B17/1042; E21B17/105
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
182 words
An elastomer centralizer for a production string comprising: a. an elastomer body having a split extending longitudinally thereof; b. said body having a longitudinally extending, central opening communicating with said split; c. a plurality of longitudinally spaced rings molded in said body adjacent said longitudinal opening, said rings being split to coincide with the split in said elastomer body and having portions extending substantially at right angles to said rings at said split with an opening therethrough whereby said elastomer body may be closed and positioned on the production string; d. said elastomer body having a plurality of projections extending longitudinally of said body in circumferentially spaced relationship; e. an annular rib extending in a plane substantially perpendicular to said elastomer body between predetermined pairs of said projections and having a circumferential outer edge; f. said rib having a plurality of openings extending therethrough in a plane parallel to the axis of the central opening through said elastomer body; and g. said rib having a separate split therein from its circumferential outer edge to each of the respective openings in said rib.
Claim 2
Dependent Claim
182 words
An elastomer centralizer for a production string comprising: a. an elastomer body having a split extending longitudinally thereof; b. said body having a longitudinally extending, central opening communicating with said split; c. a plurality of longitudinally spaced rings molded in said body adjacent said longitudinal opening, said rings being split to coincide with the split in said elastomer body and having portions extending substantially at right angles to said rings at said split with an opening therethrough whereby said elastomer body may be closed and positioned on the production string; d. said elastomer body having a plurality of projections extending longitudinally of said body in circumferentially spaced relationship; e. an annular rib extending in a plane substantially perpendicular to said elastomer body between predetermined pairs of said projections and having a circumferential outer edge; f. said rib having a plurality of openings extending therethrough in a plane parallel to the axis of the central opening through said elastomer body; and g. said rib having a separate split therein from its circumferential outer edge to each of the respective openings in said rib.
Claim 3
Dependent Claim
44 words
The invention of claim 1 wherein said body has three projections spaced equidistant circumferentially of said body; and wherein the split in said body is between two of the projections and wherein said annular rib extends from said two projections to the third projection.
Claim 4
Dependent Claim
59 words
The invention of claim 2 wherein each of said projections has a pair of longitudinally extending side surfaces with each side surface including a first portion extending at an angle from said body to a predetermined point and a continuous additional portion extending parallel from the termination of each of the first portions in planes perpendicular to said body.
Claim 5
Dependent Claim
22 words
The invention of claim 2 wherein two openings are provided in the annular rib between said two projections and said third projection.
Claim 6
Dependent Claim
65 words
The invention of claim 4 wherein the split in said annular rib to each of the openings extends to each of openings therein at a converging angle from said circumferential outer edge of said rib and in spaced relationship to enable the portion of the annular rib therebetween to be twisted relative to the plane of said rib for access to the pair of openings.
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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) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |