Patent US4381584A successfully refreshed from Google Patents.
US4381584A
Expired / Lapsed
US
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Dual string spider
Assignee: Bilco Tools Inc
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Filing: 1980-12-15
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Granted: 1983-05-03
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Expires: 2000-12-15
Abstract
Abstract A dual string spider having a body of two halves pivotally secured at one side and releasably secured at the other side with bowls extending through the body and open to each other, gripping means for each bowl, an actuator for each gripping means, and bars extend through the body halves to divide the bowls and to center well strings in their respective bowls.
Inventors
- 👤 William E. Coyle, Sr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:45
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/10; E21B33/00; E21B33/02; E21B33/03; E21B33/04; E21B33/047
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
95 words
A dual spider comprising a body having a pair of tapered bowls extending therethrough with said bowls being open to each other at their inner portions a set of gripping slips for each bowl, an actuator for each set of gripping slips a pair of bars extending across the lower portion of said body below said bowls, said bars in plan view being substantially perpendicular to each other and intersecting mid way between the centers of said bowls to provide a barrier therebetween, and means releasably securing the ends of the bars in said body.
Claim 2
Dependent Claim
95 words
A dual spider comprising a body having a pair of tapered bowls extending therethrough with said bowls being open to each other at their inner portions a set of gripping slips for each bowl, an actuator for each set of gripping slips a pair of bars extending across the lower portion of said body below said bowls, said bars in plan view being substantially perpendicular to each other and intersecting mid way between the centers of said bowls to provide a barrier therebetween, and means releasably securing the ends of the bars in said body.
Claim 3
Dependent Claim
47 words
A dual string spider according to claim 1 wherein said body is formed in two halves with one of said bowls in each half, and including means pivotally connecting one end of each of said halves, and means releasably securing the other end of said halves together.
Claim 4
Dependent Claim
23 words
A dual spider according to claim 1 including a pair of recesses in said body said slip actuators being positioned in said recesses.
References Cited (Backward Citations)
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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) | 1986-05-02 | 1986-11-01 | 1987-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-02 | 1990-11-01 | 1991-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-02 | 1994-11-01 | 1995-05-03 | $7700.00 | Window Closed / Lapsed |