Patent US4800753A successfully refreshed from Google Patents.
US4800753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Geomechanical probe for a drilling well
Assignee: Total Compagnie Francaise des Petroles SA
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Filing: 1986-08-15
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Granted: 1989-01-31
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Expires: 2006-08-15
Abstract
Abstract A geomechanical probe for a drilling well comprises a logging box located between two inflatable preventers and including a plurality of tracers movable radially and urged outwards by springs for engaging the well wall. The tracers are mounted on pistons which are received in cylinders and urged radially inwards by springs for retracting the tracers, the pistons being driven outwardly to displace the tracers into working positions abutting the well wall by supply of actuating fluid to the cylinders. The position of the tracers is determined by differential transformers having cores fixed for radial movement with respective tracers. The preventers are inflated with pressurized fluid which is supplied thereto along passages in the probe which also supply pressurized fluid to the well space between the preventers to act upon the well wall.
Inventors
- 👤 Damien M. Despax
- 👤 Jean-Pierre A. Martin
- 👤 Francois C. Gueuret
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:36
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/124; E21B33/1243; E21B47/00; E21B49/00; E21B49/006; Y; Y10; Y10S; Y10S367/00; Y10S367/911
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
103 words
A geometrical probe apparatus for use in a well bore, comprising: an elongate body; upper and lower expandable preventers disposed about said body in a longitudinally spaced relationship; expansion means for expanding said first and second preventers to seal between said body and the wall of said well bore; passage means for conveying a pressurised fluid from a location above said upper preventer to a location between said body, said longitudinally spaced preventers and the wall of said well bore; and tracer means located between said longitudinally spaced preventers for determining cross-sectional characteristics of said well bore on at least one transverse plane.
Claim 2
Dependent Claim
103 words
A geometrical probe apparatus for use in a well bore, comprising: an elongate body; upper and lower expandable preventers disposed about said body in a longitudinally spaced relationship; expansion means for expanding said first and second preventers to seal between said body and the wall of said well bore; passage means for conveying a pressurised fluid from a location above said upper preventer to a location between said body, said longitudinally spaced preventers and the wall of said well bore; and tracer means located between said longitudinally spaced preventers for determining cross-sectional characteristics of said well bore on at least one transverse plane.
Claim 3
Dependent Claim
115 words
Apparatus for determining geometrical and hydraulic characteristics of a reservoir fracture generated by the injection of a pressurized fluid into a well bore intersecting said reservoir, comprising: a first expandable preventer for sealing across said well bore; first expansion means for expanding said first preventer; a second expandable preventer for sealing across said well bore below said first preventer; second expansion means for expanding said second preventer; passage means for conveying a pressurized fluid from a location above said first preventer to a location between said first and second preventers; and tracer means located between said first and second preventers for determining the cross-sectional characteristics of said well bore on at least one transverse plane.
Claim 4
Dependent Claim
115 words
Apparatus for determining geometrical and hydraulic characteristics of a reservoir fracture generated by the injection of a pressurized fluid into a well bore intersecting said reservoir, comprising: a first expandable preventer for sealing across said well bore; first expansion means for expanding said first preventer; a second expandable preventer for sealing across said well bore below said first preventer; second expansion means for expanding said second preventer; passage means for conveying a pressurized fluid from a location above said first preventer to a location between said first and second preventers; and tracer means located between said first and second preventers for determining the cross-sectional characteristics of said well bore on at least one transverse plane.
Claim 5
Dependent Claim
69 words
The apparatus of claim 1 or 2 wherein said tracer means comprises a plurality of radially movable tracers, said tracers being biased radially outwardly and being mounted on radially movable support members movable between retracted positions and extended working positions in which the tracers are able to contact the bore wall, and sensing means surrounding said tracers for providing signals representative of the radial positions of the respective tracers.
Claim 6
Dependent Claim
36 words
The apparatus of claim 3 wherein the tracers are arranged in at least two groups located in respective parallel transverse planes, the tracers of one group being offset circumferentially relative to tracers of an adjacent group.
Claim 7
Dependent Claim
21 words
The apparatus of claim 3 wherein said sensing means comprises differential transformers having cores fixed for radial movement with respective tracers.
Claim 8
Dependent Claim
58 words
The apparatus of claim 3, wherein the movable members comprise pistons, the pistons being movable radially in respective cylinders, springs act on the pistons and urge the pistons radially inwardly to retract the tracers, and means is provided for introducing actuating fluid into the cylinders to displace the pistons outwardly for moving the tracers into said working positions.
Claim 9
Dependent Claim
72 words
The apparatus of claim 6, wherein a chamber is provided along the body for containing the actuating fluid, electrical drive and control means are accommodated in said chamber for pressurizing the fluid and transmitting the fluid to said cylinders, and an electrical connector is provided for releasable connection of an electric cable for conducting electrical power and command signals to the apparatus and for transmitting electrical logging information signals from the apparatus.
Claim 10
Dependent Claim
31 words
The apparatus of claim 7, wherein the electrical connector is one part of a connector of the two-part plug-in type and suitable for use in a medium containing particles in suspension.
Claim 11
Independent Claim
117 words
A method for determining the geometrical and hydraulic characteristics of a fracture generated in a reservoir intersected by a well bore, comprising: creating a first seal across said well bore adjacent said reservoir; creating a second seal across said well bore adjacent said reservoir and longitudinally spaced from said first seal; injecting a pressurized fluid into the well bore area defined between said first seal and said second seal; measuring the cross-sectional characteristics of said well bore area on at least one transverse plane; generating a fracture in said reservoir adjacent said well bore area in response to said injection; and re-measuring the cross-sectional characteristics of said well bore area on said at least one transverse plane.
Claim 12
Independent Claim
117 words
A method for determining the geometrical and hydraulic characteristics of a fracture generated in a reservoir intersected by a well bore, comprising: creating a first seal across said well bore adjacent said reservoir; creating a second seal across said well bore adjacent said reservoir and longitudinally spaced from said first seal; injecting a pressurized fluid into the well bore area defined between said first seal and said second seal; measuring the cross-sectional characteristics of said well bore area on at least one transverse plane; generating a fracture in said reservoir adjacent said well bore area in response to said injection; and re-measuring the cross-sectional characteristics of said well bore area on said at least one transverse plane.
Claim 13
Dependent Claim
24 words
The method of claim 9, wherein said pressurized fluid is injected into said well bore area under matrix conditions prior to said first measurement.
Claim 14
Dependent Claim
21 words
The method of claim 9, wherein said pressurized fluid is increased in pressure after said measuring step to generate said fracture.
Claim 15
Dependent Claim
29 words
The method of claim 11, further including the steps of measuring and re-measuring the cross-sectional characteristics of said well bore area on a plurality of substantially parallel transverse planes.
Claim 16
Dependent Claim
29 words
The method of claim 9, further including the steps of measuring and re-measuring the cross-sectional characteristics of said well bore area on a plurality of substantially parallel transverse planes.
References Cited (Backward Citations)
US2102080A
Cited
US2235533A
Cited
US2281960A
Cited
US2680913A
Cited
US2760580A
Cited
US2979134A
Cited
US2815578A
Cited
US2927459A
Cited
US3023507A
Cited
US3173290A
Cited
US3165919A
Cited
US3427652A
Cited
US3402769A
Cited
US3436836A
Cited
US3488856A
Cited
US3500684A
Cited
US3474541A
Cited
US3690166A
Cited
US3871218A
Cited
US3898741A
Cited
US3969929A
Cited
US4044828A
Cited
US4109717A
Cited
US4230180A
Cited
US4524434A
Cited
US4443948A
Cited
US4559709A
Cited
US4442895A
Cited
US4529036A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-01-31 | 1992-08-01 | 1993-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-31 | 1996-08-01 | 1997-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-31 | 2000-08-01 | 2001-01-31 | $7700.00 | Window Closed / Lapsed |