US3926409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective well treating and gravel packing apparatus
Assignee: Dresser Industries Inc
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Filing: 1974-03-18
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Granted: 1975-12-16
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Expires: 1994-03-18
Abstract
Abstract The apparatus and method provides the ability to selectively treat a producing zone in a well and to gravel pack an annulus in the well casing outside a screen type liner pipe. A tubing string extending from the surface of the well bore is connected to a packer by a crossover valve. Flow down the tubing string is directed to an annulus below the packer, then inwardly through the screen type liner, then upward through the crossover into the annulus above the packer and then to the earth''s surface. Communication from the crossover to the annulus above the packer may be selectively closed to permit a treating pressure to be exerted down the tubing to force a treating fluid into the producing zone. The treating pressure is isolated from the casing above the packer to protect the casing above the packer.
Inventors
- 👤 Dave L Abney
- 👤 Robert C Williams
- 👤 Horace E Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:17
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B34/00; E21B34/06; E21B34/12; E21B43/00; E21B43/02; E21B43/04; E21B43/045
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
211 words
A crossover valve apparatus adapted for use in a well bore having a first tubing string and a second tubing string inside a portion of the first tubing string comprising: a housing having a first seal bore, a second seal bore spaced axially from said first seal bore, at least one lateral opening located between said first and said second seal bores; a tubular mandrel in said housing and movable axially from a first position to a second position in said housing and rotatable in said housing and having a first seal engaging said first seal bore in both said first and said second positions, a third seal spaced axially from said first seal and engaging said second seal bore in said second position, a second seal located between said first seal and said third seal, and engaging said second seal bore in said second position, and at least one side port located between said second seal and said third seal, and communicating with said at least one lateral opening in said first position; and releasable means for locking said mandrel and said housing in one of said first or second positions, and for permitting said mandrel and said housing to move to the other of said first or second positions.
Claim 2
Dependent Claim
211 words
A crossover valve apparatus adapted for use in a well bore having a first tubing string and a second tubing string inside a portion of the first tubing string comprising: a housing having a first seal bore, a second seal bore spaced axially from said first seal bore, at least one lateral opening located between said first and said second seal bores; a tubular mandrel in said housing and movable axially from a first position to a second position in said housing and rotatable in said housing and having a first seal engaging said first seal bore in both said first and said second positions, a third seal spaced axially from said first seal and engaging said second seal bore in said second position, a second seal located between said first seal and said third seal, and engaging said second seal bore in said second position, and at least one side port located between said second seal and said third seal, and communicating with said at least one lateral opening in said first position; and releasable means for locking said mandrel and said housing in one of said first or second positions, and for permitting said mandrel and said housing to move to the other of said first or second positions.
Claim 3
Dependent Claim
19 words
Apparatus according to claim 1 wherein said releasable means locks said mandrel and said housing in said first position.
Claim 4
Dependent Claim
16 words
Apparatus according to claim 2 wherein said releasable means comprise a jay-slot and cooperating jay-slot pin.
Claim 5
Dependent Claim
31 words
Apparatus according to claim 3 wherein said jay-slot aligns said jay-slot pin in locking position in said jay-slot upon axial movement of said mandrel and said housing to said first position.
References Cited (Backward Citations)
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US3094306A
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US3106379A
Cited
US3190360A
Cited
US3710862A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |