Patent US3556217A successfully refreshed from Google Patents.
US3556217A
Expired / Lapsed
US
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Device for wedging the packer in wells
Assignee: L P C U P INST PENTRU PROIECTA
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Filing: 1969-07-31
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Granted: 1971-01-19
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Expires: 1989-07-31
Abstract
Abstract A wedging device of a packer is constituted by an annular rubber member on the outer surface of which are secured circumferentially spaced slip members with external teeth while on the inner surface there are secured circumferentially spaced elements with tapered inner surfaces cooperatively defining a tapered bore. A conical member extends in the bore and can be inserted more deeply therein to expand the wedging device and cause the teeth to engage the inner surface of a surrounding well casing.
Inventors
- 👤 Vasile Eugeniu Anastasiu
- 👤 Traian Margarit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:01
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/129
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
127 words
A packing device adapted for being wedged in a well casing, said device comprising an annular elastic member having inner and outer surfaces, a plurality of slip members secured to the outer surface of said annular elastic member and arranged therearound in circumferentially spaced relation, said slip members having an external surface for engaging the inner surface of a well casing, a plurality of elements secured to the inner surface of the annular elastic member and arranged therearound in circumferentially spaced relation, the latter elements having tapered internal surfaces which cooperatively define a conical bore, and a displaceable conical member in said bore engaging said elements to urge the same outwardly, when forced deeper therein, to cause the slip members to move outwardly and engage the casing.
Claim 2
Dependent Claim
127 words
A packing device adapted for being wedged in a well casing, said device comprising an annular elastic member having inner and outer surfaces, a plurality of slip members secured to the outer surface of said annular elastic member and arranged therearound in circumferentially spaced relation, said slip members having an external surface for engaging the inner surface of a well casing, a plurality of elements secured to the inner surface of the annular elastic member and arranged therearound in circumferentially spaced relation, the latter elements having tapered internal surfaces which cooperatively define a conical bore, and a displaceable conical member in said bore engaging said elements to urge the same outwardly, when forced deeper therein, to cause the slip members to move outwardly and engage the casing.
Claim 3
Dependent Claim
18 words
A device as claimed in claim 1, wherein said slip members include teeth on the external surfaces thereof.
Claim 4
Dependent Claim
26 words
A device as claimed in claim 1, wherein said slip members have transverse shoulders facing said elements for limiting displacement thereof relative to said slip members.
Claim 5
Dependent Claim
20 words
A device as claimed in claim 3, wherein said shoulders are inclined with respect to the axis of said bore.
Claim 6
Dependent Claim
38 words
A device as claimed in claim 1, wherein saiD conical member includes a terminal cylindrical portion and an axially adjustable sleeve on said cylindrical portion for limiting the depth of penetration of the conical member in said bore.
Claim 7
Dependent Claim
16 words
A device as claimed in claim 5, wherein said sleeve is threaded on said cylindrical portion.
Claim 8
Dependent Claim
17 words
A device as claimed in claim 5, wherein said sleeve is positioned in alignment with said elements.
Claim 9
Dependent Claim
25 words
A device as claimed in claim 1, wherein said elastic member is secured to said slip members and said elements by an adhesive and vulcanization.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |