US3696865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
End-of-tubing locator
Assignee: Shell USA Inc
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Filing: 1970-09-11
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Granted: 1972-10-10
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Expires: 1990-09-11
Abstract
Abstract An end-of-tubing locator is disclosed for locating the end of a tubing string depending in a well. Although conventional end-oftubing locators hang up in tubing joint recesses when the locator is withdrawn through the tubing string without performing its normal sequence of operations, the disclosed locator has the ability to disengage from such recesses for further upward movement.
Inventors
- 👤 Ronald W Chapman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:48
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/09
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
155 words
In a tool lowerable through a tubing string for locating the end thereof of the type comprising a body having latch means thereon; means mounting the latch means in a path of movement including an upwardly inclined position for engaging the tubing string during downward transport therethrough, an extended position for engaging a shoulder adjacent the end of the tubing string and a retracted position for upward transport through the tubing string, the mounting means including means for restraining the latch means in the extended position to the body until imposition of a first upward predetermined force thereon; and means biasing the latch means from the upwardly inclined position toward the extended position; the improvement wherein the mounting means comprises means holding the latch means in the upwardly inclined position during upward movement through the tubing string and releasing it for movement toward the body upon imposition of a second lesser upward predetermined force thereon.
Claim 2
Dependent Claim
155 words
In a tool lowerable through a tubing string for locating the end thereof of the type comprising a body having latch means thereon; means mounting the latch means in a path of movement including an upwardly inclined position for engaging the tubing string during downward transport therethrough, an extended position for engaging a shoulder adjacent the end of the tubing string and a retracted position for upward transport through the tubing string, the mounting means including means for restraining the latch means in the extended position to the body until imposition of a first upward predetermined force thereon; and means biasing the latch means from the upwardly inclined position toward the extended position; the improvement wherein the mounting means comprises means holding the latch means in the upwardly inclined position during upward movement through the tubing string and releasing it for movement toward the body upon imposition of a second lesser upward predetermined force thereon.
Claim 3
Dependent Claim
16 words
The tool of claim 1 wherein the third predetermined force is less than the second force.
Claim 4
Dependent Claim
47 words
The tool of claim 1 wherein the latch means comprises a latch and the constraining means comprises means pivotally mounting the latch on the body from the upwardly inclined position through a generally horizontal attitude in the extended position to a depending attitude in the retracted position.
Claim 5
Dependent Claim
35 words
The tool of claim 3 wherein the releasing means comprises means for breaking the pivotal mounting means and enabling movement of the latch means through the pivot axis to a position abutting the restraining means.
Claim 6
Dependent Claim
26 words
The tool of claim 4 wherein the restraining means comprises a shear pin positioned in the path of movement of the latch adjacent the extended position.
Claim 7
Dependent Claim
36 words
The tool of claim 4 wherein the latch comprises a slot therein, the pivotal mounting means comprises a pin in the slot and the releasing means comprises shear means constraining the pivot pin in the slot.
Claim 8
Dependent Claim
23 words
The tool of claim 3 wherein the latch comprises telescoping parts; and the releasing means comprises shear means connecting the telescoping parts together.
Claim 9
Dependent Claim
125 words
An end-of-tubing locator comprising an elongate body; a latch having an enlarged opening therein; a pin in the opening mounting the latch to the body for movement about an axis transverse thereto for movement between an upwardly inclined position and a depending position; means releasably holding the pin in a predetermined position in the opening until application of a predetermined force on the latch when in the upwardly inclined position and ineffective to release the pin when the latch is disposed in an extended position transverse to the body; means biasing the latch toward the extended position; and means engaging and restraining the latch at the extended position from movement toward the depending position until the imposition of a predetermined upward force on the body.
Claim 10
Dependent Claim
125 words
An end-of-tubing locator comprising an elongate body; a latch having an enlarged opening therein; a pin in the opening mounting the latch to the body for movement about an axis transverse thereto for movement between an upwardly inclined position and a depending position; means releasably holding the pin in a predetermined position in the opening until application of a predetermined force on the latch when in the upwardly inclined position and ineffective to release the pin when the latch is disposed in an extended position transverse to the body; means biasing the latch toward the extended position; and means engaging and restraining the latch at the extended position from movement toward the depending position until the imposition of a predetermined upward force on the body.
Claim 11
Dependent Claim
28 words
The locator of claim 8 wherein the enlarged opening is an axial slot and the predetermined position is the lower slot and when the latch is upwardly inclined.
Claim 12
Dependent Claim
31 words
The locator of claim 8 wherein the released pin is arranged to mount the latch for movement in a path including a position abutting the restraining means and the depending position.
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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) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |