Patent US3680646A successfully refreshed from Google Patents.
US3680646A
Expired / Lapsed
US
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Reamer-stabilizer
Assignee: Smith International Inc
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Filing: 1970-10-28
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Granted: 1972-08-01
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Expires: 1990-10-28
Abstract
Abstract A reamer-stabilizer for rotary drilling of earth formations includes a body for transmitting fluid, axial loads, bending moment, and torque, to which fixed, wall contacting blades are replaceably attached by means including body portions suitable also for replaceable attachment of rolling cutters if desired. The wall contacting elements, blades or rollers, are set tangent to a helix concentric with the body. The blade attachment means may include hard resilient antifretting means.
Inventors
- 👤 Robert Q Hughes
- 👤 William R Garrett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:55
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/10; E21B17/1078; E21B10/00; E21B10/26
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
119 words
Drilling tool comprising: a tubular body having a flow passage therethrough and means at its ends for making connection with other drill string members, a recess in said body disposed at the periphery thereof and adapted to receive a wall contacting element, a wall contacting element received in said recess and protruding radially outward therefrom, said wall contacting element having an aperture extending therethrough from the end of the element nearest one end of the body to the end of the element nearest the other end of the body, a shaft extending through said aperture, means releasably mounting the ends of said shaft to said body, and antirotation means preventing rotation of said wall contacting element on said shafT.
Claim 2
Dependent Claim
119 words
Drilling tool comprising: a tubular body having a flow passage therethrough and means at its ends for making connection with other drill string members, a recess in said body disposed at the periphery thereof and adapted to receive a wall contacting element, a wall contacting element received in said recess and protruding radially outward therefrom, said wall contacting element having an aperture extending therethrough from the end of the element nearest one end of the body to the end of the element nearest the other end of the body, a shaft extending through said aperture, means releasably mounting the ends of said shaft to said body, and antirotation means preventing rotation of said wall contacting element on said shafT.
Claim 3
Dependent Claim
40 words
Tool according to claim 1 wherein the axis of said shaft is tangent to a helix concentric with the flow axis of said body, said wall contacting element having an outer face that is cylindrically curved about said flow axis.
Claim 4
Dependent Claim
34 words
Tool according to claim 1 wherein said antirotation means includes a portion with which said element is provided extending over the edge of said recess engaging cooperative means with which the body is provided.
Claim 5
Dependent Claim
37 words
Tool according to claim 3 wherein the surface of said extending portion of the blade is flat where it engages said cooperative means and said cooperative means includes a flat surface where it engages said extending portion.
Claim 6
Dependent Claim
27 words
Tool according to claim 3 including antifretting means between said extending portion of said wall contacting element and said cooperative means with which the body is provided.
Claim 7
Dependent Claim
33 words
Tool according to claim 5 wherein said antifretting means comprises a wear insert of elastic material having a Shore Durometer hardness of greater than 0 and less than 100 on the ''''D'''' scale.
Claim 8
Dependent Claim
40 words
Tool according to claim 5 wherein said antifretting means comprises a wear insert of elastic material having a Shore Durometer hardness of greater than 50 and less than 100 on the Shore ''''A'''' scale, said material being reinforced with fabric.
Claim 9
Dependent Claim
65 words
Tool according to claim 1 wherein the means releasably mounting the shaft to the body includes a member at each end of the shaft having an aperture into which extends the end of the shaft, each member being releasably mounted on the body, the wall contacting element engaging said members at its ends to prevent axial motion of the wall contacting element on the shaft.
Claim 10
Dependent Claim
81 words
Tool according to claim 8, each of said members being a block fitted in a channel in said body having a stop shoulder at one end and connecting at its other end with said recess and including means retaining said blocks in said channels against outward displacement and means preventing axial movement of said shaft in said blocks comprising a pin entending transversely through one of said blocks and a groove in the shaft opening toward the outside of said body.
Claim 11
Dependent Claim
42 words
Tool according to claim 8, wherein the antirotation means includes a portion with which said element is provided extending over the edge of the recess and cooperating means with which one of the shaft mounting members carried by the body is provided.
Claim 12
Dependent Claim
26 words
Tool according to claim 10 including antifretting means between the adjacent surfaces of said extending portion of the wall contacting element and said shaft mounting member.
Claim 13
Dependent Claim
19 words
Tool according to claim 11 wherein the antifretting means comprises an elastomer vulcanized to one of said adjacent surfaces.
Claim 14
Dependent Claim
30 words
Tool according to claim 11 wherein said antifretting means comprises a wear insert set in a recess in one of the adjacent surfaces between which is set the antifretting means.
Claim 15
Dependent Claim
34 words
Tool according to claim 13 wherein the wear insert is set in a recess in said surface of said shaft mounting member and extends laterally beyond said extending portion of said wall contacting element.
Claim 16
Dependent Claim
14 words
Tool according to claim 14 wherein said wear insert is cemented in said recess.
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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 |