Patent US3727684A successfully refreshed from Google Patents.
US3727684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Duplex mandrel for a crossover system
Assignee: CAMCO INC US
•
Filing: 1972-01-31
•
Granted: 1973-04-17
•
Expires: 1992-01-31
Abstract
Abstract A pair of mandrels providing a crossover system for use in a dual string of well tubing in which each of the mandrels are adapted to be connected in one of the well tubings and each of the mandrels includes an open bore therethrough and a pocket for receiving flow control devices in which the mandrels are connected together with a fluid conduit extending between the pockets. The mandrels are connected together with the open bores being positioned side by side and the pockets positioned side by side with the open bores.
Inventors
- 👤 B Terral
- 👤 J Hewitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:58
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/14
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
68 words
A duplex mandrel for a crossover system for use in a dual string of well tubing comprising, a pair of mandrels, each of said mandrels adapted to be connected in one of the well tubings, each of the mandrels including an open bore therethrough and a pocket for flow control devices offset from the bore, said mandrels being connected together, and a fluid conduit extending between the pockets.
Claim 2
Dependent Claim
68 words
A duplex mandrel for a crossover system for use in a dual string of well tubing comprising, a pair of mandrels, each of said mandrels adapted to be connected in one of the well tubings, each of the mandrels including an open bore therethrough and a pocket for flow control devices offset from the bore, said mandrels being connected together, and a fluid conduit extending between the pockets.
Claim 3
Dependent Claim
89 words
A duplex mandrel for a crossover system for use in a dual string of well tubing comprising, a pair of mandrels, each of said mandrels adapted to be connected in one of the well tubings, each of the mandrels including an open bore therethrough aligned with the connected well tubing, and including a sidepocket offset from the open bore, said mandrels being connected together with the open bores being positioned side by side and the sidepockets being positioned side by side, and a fluid conduit extending between the sidepockets.
Claim 4
Dependent Claim
89 words
A duplex mandrel for a crossover system for use in a dual string of well tubing comprising, a pair of mandrels, each of said mandrels adapted to be connected in one of the well tubings, each of the mandrels including an open bore therethrough aligned with the connected well tubing, and including a sidepocket offset from the open bore, said mandrels being connected together with the open bores being positioned side by side and the sidepockets being positioned side by side, and a fluid conduit extending between the sidepockets.
Claim 5
Dependent Claim
11 words
The apparatus of claim 2 wherein the mandrels are welded together.
Claim 6
Dependent Claim
93 words
A duplex mandrel for a crossover system for use in a dual string of well tubing comprising, a pair of mandrels, each of said mandrels adapted to be connected in one of the well tubing, each of the mandrels including an opeN bore therethrough offset from the bore of the connected well tubing, and including a pocket offset from the open bore, and said mandrels being connected together with the open bores being positioned side by side and the pockets being positioned side by side, and a fluid conduit extending between the pockets.
Claim 7
Dependent Claim
93 words
A duplex mandrel for a crossover system for use in a dual string of well tubing comprising, a pair of mandrels, each of said mandrels adapted to be connected in one of the well tubing, each of the mandrels including an opeN bore therethrough offset from the bore of the connected well tubing, and including a pocket offset from the open bore, and said mandrels being connected together with the open bores being positioned side by side and the pockets being positioned side by side, and a fluid conduit extending between the pockets.
Claim 8
Dependent Claim
11 words
The apparatus of claim 4 wherein the mandrels are welded together.
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) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |