US3750748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liner separation apparatus
Assignee: Individual
•
Filing: 1971-12-27
•
Granted: 1973-08-07
•
Expires: 1991-12-27
Abstract
Abstract Apparatus for separating an upper portion of a metallic liner from the inside wall of oil well production tubing to prepare said liner for removal therefrom. The apparatus includes a plurality of fingers which are pivotally mounted on a central body and are movable outwardly to an expanded position by an actuating sleeve. In the expanded position, the fingers are inserted between the liner and the tubing whereby the upper portion of the liner is separated from the tubing.
Inventors
- 👤 J Kinley
- 👤 C Agee
- 👤 C Fowler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:25
CPC Classifications
E; E21; E21B; E21B29/00
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
107 words
Apparatus for separating a liner from the inside wall of a tubular member, comprising: a support body adapted to be placed in said tubular member; liner separating means for entry and longitudinal movement between the wall of the tubular member and the liner for deforming the liner inwardly relative to the tubular member; mounting means for mounting said liner separating means for movement between a retracted position out of engagement with the wall of the tubular member and an operating position between the wall of the tubular member and the liner; and actuating means for moving said liner separating means from said retracted to said operating position.
Claim 2
Dependent Claim
107 words
Apparatus for separating a liner from the inside wall of a tubular member, comprising: a support body adapted to be placed in said tubular member; liner separating means for entry and longitudinal movement between the wall of the tubular member and the liner for deforming the liner inwardly relative to the tubular member; mounting means for mounting said liner separating means for movement between a retracted position out of engagement with the wall of the tubular member and an operating position between the wall of the tubular member and the liner; and actuating means for moving said liner separating means from said retracted to said operating position.
Claim 3
Dependent Claim
33 words
The structure set forth in claim 1, including: said liner separating means includes a separating element tapered at one end for insertion between said liner and the inside wall of said tubular member.
Claim 4
Dependent Claim
58 words
Apparatus set forth in claim 1 wherein said support body includes: a support adapted to be connected to a tool for moving said apparatus in said tubular member; a mandrel releasably mounted on said support and extending therefrom; and support mounting means mounting said liner separating means on said mandrel for movement between said retracted and operating positions.
Claim 5
Dependent Claim
56 words
The structure set forth in claim 1 wherein said liner separating means includes: a plurality of liner separating elements; and said mounting means mounting said elements for movement between retracted and operating positions for crimping and separating an upper portion of said liner from the wall of said tubular member upon insertion of said elements therebetween.
Claim 6
Dependent Claim
39 words
The structure set forth in claim 4 including: band means extending about said liner separating elements to maintain said liner separating elements in said retracted position until said actuating means moves said liner separating elements to said operating position.
Claim 7
Dependent Claim
36 words
The structure set forth in claim 1, including: said liner separating means including a separating element; and pivotal means for pivotally mounting said separating element on said support body for movement between retracted and operating positions.
Claim 8
Dependent Claim
73 words
The structure set forth in claim 2, including: an additional separating element and means mounting same for movement between retracted and operating positions on said support body substantially adjacent to said first-mentioned separating element whereby, upon insertion of said separating elements between said liner and said wall of said tubular member, substantially adjacent upper sections of said liner are separated from said tubular member and said liner is crimped between said upper sections.
Claim 9
Dependent Claim
55 words
The structure set forth in claim 2 including: an additional separating element and means mounting same for movement between retracted and operating positions on said support body substantially opposite from said first-mentioned operating element whereby substantially opposite upper sections of said liner are separated from said tubular member upon insertion of said expandable elements therebetween.
Claim 10
Dependent Claim
44 words
The structure set forth in claim 2 in which said separating element includes: a substantially coNvex outside surface adapted to fit against the inner wall of the tubular member; and a substantially convex inner surface adapted to engage the outside wall of said liner.
Claim 11
Dependent Claim
59 words
The structure set forth in claim 1 wherein said actuating means includes: an actuating sleeve disposed slidably over said support body for movement relative thereto between an initial position out of engagement with said liner separating means and an actuated position in engagement with said liner separating means for moving said liner separating means outwardly to said operating position.
Claim 12
Dependent Claim
29 words
The structure set forth in claim 10, including: resilient means mounted over said support body in engagement with said actuating sleeve for urging said sleeve to the actuated position.
Claim 13
Dependent Claim
57 words
The device set forth in claim 10, including: said liner separating means including a separating element pivotally mounted on said support body, said separating element having a camming surface thereon; and said actuating sleeve including a surface for engaging said camming surface of said separating element to cause said separating element to pivot to said operating position.
Claim 14
Dependent Claim
58 words
The structure set forth in claim 10, including: releasable means for releasably maintaining said actuating sleeve in said initial position; and said releasable means releasing said actuating sleeve upon engagement with a downwardly facing shoulder of said tubular member during movement of said apparatus away from said liner whereby said actuating sleeve is movable to said actuating position.
Claim 15
Dependent Claim
116 words
The structure set forth in claim 13 wherein said releasable means includes: a release lever pivotally mounted on said support body, said release lever being held in engagement with said actuating sleeve by a shear pin which extends through said release lever and said support body; and a latch dog pivotally mounted on said support body and extending therefrom whereby, upon movement of said apparatus away from said liner, said latch dog engages said release lever with sufficient force to cause said shear pin to shear thereby allowing said release lever to pivot out of engagement with said actuating sleeve and thus release said actuating sleeve for slidable movement into engagement with said liner separating means.
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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |