US5667015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well barrier
Assignee: BJ Services Co USA
•
Filing: 1996-01-16
•
Granted: 1997-09-16
•
Expires: 2016-01-16
Abstract
Abstract A well barrier for separating two liquids in a gas or oil well. The well barrier includes opposing sets of laths which project slantingly away from a centrally positioned fixing device. A set of upper and lower canvas materials may be affixed to each of the sets of laths to provide enhanced sealing effect. Preferably, the laths are also positioned in an overlapping relationship to thereby minimize the overall length of the well barrier while also maintaining the required functionality.
Inventors
- 👤 Kristian Harestad
- 👤 Thor-Peter Herigstad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:19
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/13; E21B33/136
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
83 words
A well barrier for the separation of two liquids in a gas or oil well, comprising: (1) a fixing device; (2) a first set of laths coupled to said fixing device projecting slantingly away from said fixing device in a first direction; and (3) a second set of laths coupled to said fixing device projecting slantingly away from said fixing device in a second direction; wherein said first set of laths and said second set of laths are positioned in an overlapping relationship.
Claim 2
Dependent Claim
83 words
A well barrier for the separation of two liquids in a gas or oil well, comprising: (1) a fixing device; (2) a first set of laths coupled to said fixing device projecting slantingly away from said fixing device in a first direction; and (3) a second set of laths coupled to said fixing device projecting slantingly away from said fixing device in a second direction; wherein said first set of laths and said second set of laths are positioned in an overlapping relationship.
Claim 3
Dependent Claim
17 words
The well barrier of claim 1, wherein said first direction is substantially opposite to said second direction.
Claim 4
Dependent Claim
22 words
The well barrier of claim 1, wherein said first set of laths and said second set of laths run between one another.
Claim 5
Dependent Claim
33 words
The well barrier of claim 1, further comprising: (1) a first canvas material coupled to said first set of laths; and (2) a second canvas material coupled to said second set of laths.
Claim 6
Dependent Claim
33 words
The well barrier of claim 1, further comprising: (1) a first bag-like structure coupled to said first set of laths; and (2) a second bag-like structure coupled to said second set of laths.
Claim 7
Dependent Claim
47 words
The well barrier of claim 1, further comprising: (1) an upper bar coupled to said fixing device and adapted for guiding said well barrier within a pipe; and (2) a lower bar coupled to said fixing device and adapted for guiding said well barrier within a pipe.
Claim 8
Independent Claim
78 words
A method of placing a well barrier at a predetermined location within a well, comprising: (1) placing a pipe within said well (2) guiding said well barrier within said pipe to said predetermined location within said well by forcing said well barrier through said pipe using a plug; and (3) placing said well barrier into intimate contact with said well at a plurality of discrete contact points at each of a plurality of discrete locations within said well.
Claim 9
Independent Claim
78 words
A method of placing a well barrier at a predetermined location within a well, comprising: (1) placing a pipe within said well (2) guiding said well barrier within said pipe to said predetermined location within said well by forcing said well barrier through said pipe using a plug; and (3) placing said well barrier into intimate contact with said well at a plurality of discrete contact points at each of a plurality of discrete locations within said well.
Claim 10
Dependent Claim
13 words
The method of claim 7, wherein said well barrier includes a guide rod.
References Cited (Backward Citations)
US1687424A
Cited
US1979802A
Cited
US2179812A
Cited
US2187480A
Cited
US2618345A
Cited
US2672200A
Cited
US2646845A
Cited
US2969839A
Cited
US3070167A
Cited
US3109491A
Cited
US3385368A
Cited
US3633673A
Cited
US3891034A
Cited
US3955625A
Cited
US4275788A
Cited
US4421169A
Cited
US4501327A
Cited
US4495997A
Cited
US4491178A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-09-15 | 2001-03-17 | 2001-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-09-15 | 2005-03-17 | 2005-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-09-15 | 2009-03-17 | 2009-09-16 | $7700.00 | Window Closed / Lapsed |