MWD formation tester
First Claim
1. A formation testing tool comprising:
- a longitudinal body having a surface;
an extendable sample device coupled to the body, the extendable sample device having a terminal end surface and configured to be recessed beneath the body surface in a first position and to extend beyond the body surface and toward a borehole wall surface in a second position;
an inner member reciprocally disposed within the extendable sample device and configured to be recessed beneath the extendable sample device end surface in a first position and to extend beyond the sample device end surface and toward the borehole wall surface in a second position, the inner member including a fluid passageway;
a screen detachably coupled to the inner member and in fluid communication with the fluid passageway; and
a scraper that frictionally engages the screen.
1 Assignment
0 Petitions
Accused Products
Abstract
A formation testing tool is described herein, including a formation probe assembly having an extendable sampling probe surrounded by a cylindrical sleeve. The sleeve is configured to engage a metal skirt having an elastomeric seal pad coupled thereto. The skirt and seal are configured to be field replaceable. The elastomeric pad has a non-planar outer surface which engages a borehole wall in preparation for formation testing. The seal pad may be donut-shaped, having an aperture through the middle of the seal pad. The seal pad and its surface may include numerous different embodiments, including having a curved profile. The seal pad may also include numerous different embodiments of means for coupling the seal pad to the metal skirt. The formation testing tool also includes formation probe assembly anti-rotation means, a deviated non-circular flowbore, and at least one closed hydraulic fluid chamber for balancing fluid pressures.
124 Citations
64 Claims
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1. A formation testing tool comprising:
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a longitudinal body having a surface; an extendable sample device coupled to the body, the extendable sample device having a terminal end surface and configured to be recessed beneath the body surface in a first position and to extend beyond the body surface and toward a borehole wall surface in a second position; an inner member reciprocally disposed within the extendable sample device and configured to be recessed beneath the extendable sample device end surface in a first position and to extend beyond the sample device end surface and toward the borehole wall surface in a second position, the inner member including a fluid passageway; a screen detachably coupled to the inner member and in fluid communication with the fluid passageway; and a scraper that frictionally engages the screen. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A formation testing tool comprising:
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a longitudinal body having a surface; an extendable MWD sample device coupled to the body, the extendable sample device configured to be recessed beneath the surface of the body in a first position and to extend beyond the surface in a second position; an elastomeric pad coupled to the extendable sample device, the pad having a base surface and an outer surface, wherein the base surface is detachably coupled to the sample device and the outer surface is nonplanar; and an extendable snorkel coupled to the sample device, the snorkel having means for screening contaminants from a fluid and means for frictionally agitating the screening means. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A formation testing tool comprising:
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a longitudinal body having a surface; an extendable MWD sample device coupled to the body, the extendable sample device configured to be recessed beneath the surface of the body in a first position and to extend beyond the surface in a second position; an elastomeric pad coupled to the extendable sample device, the pad having a base surface, a central aperture, an outer edge and an outer surface; wherein the outer surface comprises a profile having an outer radius surface, an inner radius surface and a cylindrical surface; and wherein the cylindrical surface extends in a first direction to a first edge where the cylindrical surface merges into the inner radius surface, and the cylindrical surface extends in a second direction to a second edge where the cyhndrical surface merges into the outer radius surface. - View Dependent Claims (17, 18)
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19. A formation testing tool comprising:
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a longitudinal body having a surface; an extendable MWD sample device coupled to the body, the extendable sample device configured to be recessed beneath the surface of the body in a first position and to extend beyond the surface in a second position; an elastomeric pad coupled to the extendable sample device, the pad having a base surface and an outer surface that is nonplanar; and a skirt having a pad surface and an extension, wherein the skirt is disposed between the pad base surface and the extendable sample device such that the skirt extension extends into and engages an inner bore of the extendable sample device. - View Dependent Claims (20)
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21. The formation testing tool of 20 wherein the skirt pad surface is bonded to the pad base surface and the skirt extension comprises a threaded segment for threadingly engaging a threaded portion of the extendable sample device inner bore.
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22. A formation testing tool comprising:
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a longitudinal body having a surface; an extendable MWD sample device coupled to the body, the extendable sample device configured to be recessed beneath the surface of the body in a first position and to extend beyond the surface in a second position; an elastomeric pad coupled to the extendable sample device, the pad having a base surface and an outer surface, wherein the base surface is detachably coupled to the sample device and the outer surface is nonplanar; a skirt having a pad surface and an extension, wherein the skirt is disposed between the pad base surface and the extendable sample device; and wherein the skirt pad surface comprises an outer rim configured to receive a tool. - View Dependent Claims (23, 24, 25)
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26. A formation testing tool comprising:
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a longitudinal body having a surface; an extendable MWD sample device coupled to the body, the extendable sample device configured to be recessed beneath the surface of the body in a first position and to extend beyond the surface in a second position; an elastomeric pad coupled to the extendable sample device, the pad having a base surface and an outer surface, wherein the base surface is detachably coupled to the sample device and the outer surface is nonplanar; a skirt having a pad surface and an extension, wherein the skirt is disposed between the pad base surface and the extendable sample device; and wherein the skirt pad surface further comprises at least one groove portion. - View Dependent Claims (27, 28)
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29. A formation testing tool comprising:
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a longitudinal body having a surface; an extendable MWD sample device coupled to the body, the extendable sample device configured to be recessed beneath the surface of the body in a first position and to extend beyond the surface in a second position; an elastomeric pad coupled to the extendable sample device, the pad having a base surface and an outer surface, wherein the base surface is detachably coupled to the sample device and the outer surface is nonplanar; a skirt having a pad surface and an extension, wherein the skirt is disposed between the pad base surface and the extendable sample device; and wherein the skin further comprises a plurality of counterbores. - View Dependent Claims (30)
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31. A formation testing tool comprising:
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a longitudinal body having a surface; an extendable MWD sample device coupled to the body, the extendable sample device configured to be recessed beneath the surface of the body in a first position and to extend beyond the surface in a second position; an elastomeric pad coupled to the extendable sample device, the pad having a base surface, a central aperture, an outer edge and an outer surface; wherein the outer surface comprises a profile having a spherical surface and a radius surface; wherein the spherical surface begins at the outer edge and merges into the radius surface, and the radius surface curves into the central aperture; and wherein the spherical surface comprises a first radius and the radius surface comprises a second radius, and wherein the first radius is greater than the second radius.
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32. A formation testing tool comprising:
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a longitudinal body having a surface; an extendable MWD sample device coupled to the body, the extendable sample device configured to be recessed beneath the surface of the body in a first position and to extend beyond the surface in a second position; an elastomeric pad coupled to the extendable sample device, the pad having a base surface and an outer surface, wherein the base surface is detachably coupled to the sample device and the outer surface is nonplanar; an equalizer valve supported by the body above the extendable sample device; a first passageway for communicating fluid between the extendable sample device and the equalizer valve; and wherein the equalizer valve is in fluid communication with an annulus surrounding the formation testing tool and with the extendable sample device. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39)
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40. A formation testing tool comprising:
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a longitudinal body having a surface; an extendable MWD sample device coupled to the body, the extendable sample device configured to be recessed beneath the surface of the body in a first position and to extend beyond the surface in a second position, the extendable sample device including an extendable snorkel having a screen and a scraper that frictionally engages the screen; and a stabilizer disposed about the body near the extendable sample device, the stabilizer configured to react a force created by the extendable sample device when the sample device is in the second position and engaged with a surface beyond the body surface. - View Dependent Claims (41)
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42. A formation testing tool comprising:
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a longitudinal body having a surface; an extendable MWD sample device coupled to the body, the extendable sample device configured to be recessed beneath the surface of the body in a first position and to extend beyond the surface in a second position, the extendable sample device including an extendable snorkel having a screen and a scraper that frictionally engages the screen; and a centralizer disposed about the body near the extendable sample device, the centralizer configured to react a force created by the extendable sample device when the sample device is in the second position and engaged with a surface beyond the body surface.
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43. A formation testing tool comprising:
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a longitudinal body having a surface, a longitudinal axis, and a central drilling fluid flowbore; and an extendable MWD sample device coupled to the body, the extendable sample device configured to be recessed beneath the surface of the body in a first position and to extend beyond the surface in a second position; wherein a portion of the central drilling fluid flowbore is deviated from the longitudinal axis of the body and substantially parallel to the longitudinal axis. - View Dependent Claims (44)
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45. A formation tester assembly comprising:
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a longitudinal, cylindrical housing having a surface; a longitudinal, cylindrical mandrel disposed within the housing; an annular space between the housing and the mandrel; a formation probe assembly supported by the housing and the mandrel and reciprocal between a retracted position and an extended position; and a hydraulic fluid reservoir extending above and below the formation probe assembly, wherein the fluid in the reservoir substantially occupies the annular space. - View Dependent Claims (46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64)
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Specification