US5161618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple fractures from a single workstring
Assignee: Mobil Oil AS
•
Filing: 1991-08-16
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Granted: 1992-11-10
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Expires: 2011-08-16
Abstract
Abstract A method for producing multiple fractures by a single operation from a single wellbore which penetrates a fracture interval which, in turn, includes a plurality of zones which break-down under different fracturing pressures. Fracturing fluid is delivered from a workstring directly to different levels within a section of the wellbore which lies adjacent the fracture interval through a plurality of alternate paths which, in turn, lie substantially adjacent to the zones to be fractured.
Inventors
- 👤 Lloyd G. Jones
- 👤 Malcolm K. Strubhar
- 👤 William P. Donlon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:53
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/25; E21B43/26
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
98 words
A method for producing multiple fractures in a single operation from a single wellbore which, in turn, penetrates a fracture interval which includes a plurality of zones which break down under different pressures, said method comprising: isolating a section of the wellbore which lies substantially adjacent said fracture interval; delivering fracturing fluid through alternate flowpaths directly adjacent different levels within said isolated section which lie substantially adjacent said respective zones within said isolated section; continuing delivery of fracturing fluid directly to said different levels within said isolated section to thereby fracture the different zones within said fracture interval.
Claim 2
Independent Claim
98 words
A method for producing multiple fractures in a single operation from a single wellbore which, in turn, penetrates a fracture interval which includes a plurality of zones which break down under different pressures, said method comprising: isolating a section of the wellbore which lies substantially adjacent said fracture interval; delivering fracturing fluid through alternate flowpaths directly adjacent different levels within said isolated section which lie substantially adjacent said respective zones within said isolated section; continuing delivery of fracturing fluid directly to said different levels within said isolated section to thereby fracture the different zones within said fracture interval.
Claim 3
Dependent Claim
16 words
The method of claim 1 wherein said fracturing fluid is delivered simultaneously through said alternate flowpaths.
Claim 4
Dependent Claim
24 words
The method of claim 1 wherein said alternate flowpaths are formed of individual conduits whose lower ends terminate substantially adjacent the respective different levels.
Claim 5
Dependent Claim
24 words
The method of claim 1 wherein said fracturing fluid is delivered to said alternate flowpaths by a workstring which is positioned within said wellbore.
Claim 6
Dependent Claim
33 words
The method of claim 4 wherein said alternate flowpaths are formed by openings which are spaced along the lower end of said workstring and positioned to lie substantially adjacent the respective different levels.
Claim 7
Dependent Claim
37 words
The method of claim 4 wherein said alternate flowpaths are formed by a plurality of shunt tubes positioned within the lower end of said workstring which have their respective lower ends terminating substantially adjacent said different levels.
References Cited (Backward Citations)
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Cited
US4945991A
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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) | 1995-11-10 | 1996-05-11 | 1996-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-11-10 | 2000-05-11 | 2000-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-11-10 | 2004-05-11 | 2004-11-10 | $7700.00 | Window Closed / Lapsed |