Patent US3680647A successfully refreshed from Google Patents.
US3680647A
Expired / Lapsed
US
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Wall contacting tool
Assignee: Smith International Inc
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Filing: 1970-05-18
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Granted: 1972-08-01
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Expires: 1990-05-18
Abstract
Abstract A drill string wall contacting tool, suitable for deviation control and/or bit stabilization is provided with replaceable wall contacting elements. Generically the tool is of the rotating fixed blade stabilizer type wherein the wall contacting elements rotate with the drill string but are fixed relative thereto, there being fluid passages in the sides of the tool which divide it azimuthally into a plurality of blades at whose periphery are the wall contacting surfaces. Preferably the tool is a four bladed stabilizer of the species known as a square drill collar. The wall contacting tool is grooved longitudinally at its outermost periphery, i.e., the corners of the square drill collar, and includes field replaceable wear elements received in the grooves and secured in place by screws or bolts. Preferably the grooves are rabbets, i.e., having two plane sides that are perpendicular to each other and the wear elements have correlative surfaces, whereby the wear elements can be screwed or bolted to both sides of the rabbet without tightening of the screws to one side drawing the strips away from the other side. In the case of a square drill collar, in order to provide greater depth to each rabbet and a larger arcuate wall contacting surface for each wear pad, and at the same time allow sufficient longitudinal fluid passage space between the wear pads, the sides of the collar between the rabbets are relieved as compared to the flat sides of the usual square drill collar.
Inventors
- 👤 James W Dixon
- 👤 Samuel T Crews Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:40
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/10; E21B17/1078
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
185 words
Wall contacting tool comprising a body having an internal fluid passage extending from one end thereof to the other, means at the ends of said body for making connections with other drill string elements, wall contacting means carried by said body, releasable means securing said wall contacting means to said body, and exterior fluid passage means adjacent said wall contacting means, said body of the tool having grooves in the outer periphery thereof receiving wall contacting means, said groove means having flat sides that are perpendicular to each other and said wall contacting means having flat sides correlative to those of said groove means, said releasable means including fastening means holding each flat side of the wall contacting means to the correlative flat side of the groove means, the fastening means holding a flat side of the wall contacting means to the correlative side of the groove means being independent of the fastening means holding the adjacent flat side of the wall contacting means to the flat side of the groove means that is correlative to said adjacent flat side of the wall contacting means.
Claim 2
Dependent Claim
185 words
Wall contacting tool comprising a body having an internal fluid passage extending from one end thereof to the other, means at the ends of said body for making connections with other drill string elements, wall contacting means carried by said body, releasable means securing said wall contacting means to said body, and exterior fluid passage means adjacent said wall contacting means, said body of the tool having grooves in the outer periphery thereof receiving wall contacting means, said groove means having flat sides that are perpendicular to each other and said wall contacting means having flat sides correlative to those of said groove means, said releasable means including fastening means holding each flat side of the wall contacting means to the correlative flat side of the groove means, the fastening means holding a flat side of the wall contacting means to the correlative side of the groove means being independent of the fastening means holding the adjacent flat side of the wall contacting means to the flat side of the groove means that is correlative to said adjacent flat side of the wall contacting means.
Claim 3
Dependent Claim
25 words
Tool according to claim 1 wherein said releasable means comprises fastener means extending through holes in said wall contacting means into holes in said body.
Claim 4
Dependent Claim
34 words
Tool according to claim 2 wherein said holes in said wall contacting means exceed in dimension perpendicular to the adjacent side of the groove the corresponding dimension of the fastening means that extends therethrough.
Claim 5
Dependent Claim
26 words
Tool according to claim 2 wherein said fastener means engages the sides of the holes in said body to hold the fastener means against axial withdrawal.
Claim 6
Dependent Claim
14 words
Tool according to claim 2 wherein said fastener means extends clear through said body.
Claim 7
Dependent Claim
38 words
Tool according to claim 5 wherein the holes in said body through which extend said fastener means exceed in dimension perpendicular to the adjacent side of the groove thE corresponding dimension of the fastening means that extends therethrough.
Claim 8
Dependent Claim
347 words
Wall contacting tool comprising a tubular metal body, the interior space of said tubular body providing an internal fluid passage extending from one end of the body to the other end thereof, connection means at each end of said body for connecting said tubular body with another drill string member having an internal flow passage therethrough with said internal flow passage of said tubular body in fluid flow communication with the internal fluid passages of such other drill string members, said tubular body having elongated grooves in the outer periphery thereof,said grooves extending longitudinally from nearer one end of said body to nearer the other end of said body, said grooves each having flat sides and including a generally V shaped section transverse to the length of the groove with the V pointing inwardly toward said internal fluid passage of the tubular body, wall contacting means carried by said body in said grooves, said wall contacting means each including an integral elongated metal piece having flat sides correlative to the flat sides of the groove and including a generally V shaped section transverse to the length of said metal piece with the V section pointing inwardly toward said internal fluid passage of the tubular body, and each of said metal pieces having another outwardly facing side provided with hard wear resistant material for contacting the wall of a well bore, said outwardly facing side lying transverse to the bisector of the angle between said flat sides of the metal piece which are correlative to the flat sides of the V section groove in the tool body, and releasable means securing said wall contacting means to said body, said releasable means comprising fastener means extending into holes in said body through holes in said metal pieces transverse to the lengths of said metal pieces beginning in said outwardly facing sides of said metal pieces that lie transverse to the bisector of the angle between said flat sides thereof, said tool body having exterior fluid passage means adjacent said wall contacting means extending lengthwise of said wall contacting means.
Claim 9
Dependent Claim
347 words
Wall contacting tool comprising a tubular metal body, the interior space of said tubular body providing an internal fluid passage extending from one end of the body to the other end thereof, connection means at each end of said body for connecting said tubular body with another drill string member having an internal flow passage therethrough with said internal flow passage of said tubular body in fluid flow communication with the internal fluid passages of such other drill string members, said tubular body having elongated grooves in the outer periphery thereof,said grooves extending longitudinally from nearer one end of said body to nearer the other end of said body, said grooves each having flat sides and including a generally V shaped section transverse to the length of the groove with the V pointing inwardly toward said internal fluid passage of the tubular body, wall contacting means carried by said body in said grooves, said wall contacting means each including an integral elongated metal piece having flat sides correlative to the flat sides of the groove and including a generally V shaped section transverse to the length of said metal piece with the V section pointing inwardly toward said internal fluid passage of the tubular body, and each of said metal pieces having another outwardly facing side provided with hard wear resistant material for contacting the wall of a well bore, said outwardly facing side lying transverse to the bisector of the angle between said flat sides of the metal piece which are correlative to the flat sides of the V section groove in the tool body, and releasable means securing said wall contacting means to said body, said releasable means comprising fastener means extending into holes in said body through holes in said metal pieces transverse to the lengths of said metal pieces beginning in said outwardly facing sides of said metal pieces that lie transverse to the bisector of the angle between said flat sides thereof, said tool body having exterior fluid passage means adjacent said wall contacting means extending lengthwise of said wall contacting means.
Claim 10
Dependent Claim
36 words
Tool according to the claim 11 wherein the tension axis of each of said fastener means is transverse to the tension axes of the immediately adjacent fasteners means in the same one of said metal pieces.
Claim 11
Dependent Claim
53 words
Tool according to claim 7 wherein said tool body includes portions of generally cylindrical outer periphery adjacent the ends of said grooves extending radially far enough to overlap the ends of said metal pieces in the grooves and guard the metal pieces against catching when the tool moves axially in a well bore.
Claim 12
Dependent Claim
44 words
Tool according to claim 7 wherein said exterior fluid passage means are V section grooves whose sides terminate at the outer periphery of the tool closely adjacent the sides of the grooves in which the metal pieces of the wall contacting elements are received.
Claim 13
Dependent Claim
33 words
Tool according to claim 7 wherein said fastener means each extend through said body from one of said metal pieces to another to hold both of the last said pieces to said body.
Claim 14
Dependent Claim
41 words
Tool according to claim 11 wherein the tension axis of each of said fastener means is azimuthally displaced about the axis of the tool body with respect to the immediately adjacent fastener means through the same ones of said metal pieces.
Claim 15
Dependent Claim
33 words
Tool according to claim 7 wherein said fastener means each extend through the respective metal piece transverse to one of the flat sides thereof into the corresponding flat side of the respective groove.
Claim 16
Dependent Claim
71 words
Tool according to claim 13 wherein said releasable means securing said wall contacting means to said body includes for each of said metal pieces two groups of said fastener means, one group of said fastener means extending through one of said flat sides of each of said metal pieces and the other group of said fastener means extending through the other of said flat sides of each of said metal pieces.
References Cited (Backward Citations)
US2084421A
Cited
US2088770A
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US2589534A
Cited
US2973996A
Cited
US3292708A
Cited
US3454308A
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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) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |