Patent US4385669A successfully refreshed from Google Patents.
US4385669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integral blade cylindrical gauge stabilizer reamer
Assignee: Individual
•
Filing: 1981-10-06
•
Granted: 1983-05-31
•
Expires: 2001-10-06
Abstract
Abstract This invention is directed to a stabilizer-reamer which is useful in drilling oil wells and holes in mineral formations. The stabilizer-reamer extends the life of the drill bit by maintaining the diameter of the hole to original specifications. The stabilizer-reamer comprises a stabilizer portion which reduces excessive lateral movement of the drill bit, a reamer portion which reams away undersize portions of the walls of the hole and a rock chip grinding portion which breaks down oversize rock chips in the hole.
Inventors
- 👤 Paul Knutsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:29
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/10; E21B17/1078; E21B10/00; E21B10/26; E21B10/44; E21B10/46; E21B10/56; E21B17/22
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
199 words
A stabilizer-reamer for use in association with drill stem and a drill bit in drilling a hole in a rock formation comprising in combination: (a) means for stabilizing the drill stem and drill bit against excessive lateral movement within the hole; (b) means for reaming the wall of the hole when it is of a diameter less than the diameter of the drill bit; and (c) means for grinding to smaller size pieces of rock encountered in drilling the hole in the formation and wherein the stabilizer-reamer is of a generally cylindrical shape, of a given diameter, the stabilizer means (a) comprising a portion of the shape including a portion of the curved surface of the shape with the given diameter, the reamer means (b) comprising another portion of the shape including a portion of the curved surface, the diameter of the curved surface of the reamer means (b) being sized of slightly smaller diameter than the diameter of the curved surface of the stabilizer means (a) and the hole being drilled, the curved surface of the reamer means (b) having thereon at least one hardened member which protrudes from the curved surface of means (a) and means (b).
Claim 2
Dependent Claim
199 words
A stabilizer-reamer for use in association with drill stem and a drill bit in drilling a hole in a rock formation comprising in combination: (a) means for stabilizing the drill stem and drill bit against excessive lateral movement within the hole; (b) means for reaming the wall of the hole when it is of a diameter less than the diameter of the drill bit; and (c) means for grinding to smaller size pieces of rock encountered in drilling the hole in the formation and wherein the stabilizer-reamer is of a generally cylindrical shape, of a given diameter, the stabilizer means (a) comprising a portion of the shape including a portion of the curved surface of the shape with the given diameter, the reamer means (b) comprising another portion of the shape including a portion of the curved surface, the diameter of the curved surface of the reamer means (b) being sized of slightly smaller diameter than the diameter of the curved surface of the stabilizer means (a) and the hole being drilled, the curved surface of the reamer means (b) having thereon at least one hardened member which protrudes from the curved surface of means (a) and means (b).
Claim 3
Dependent Claim
36 words
A stabilizer-reamer as defined in claim 1 wherein means (c) has thereon a plurality of discretely disposed elements which are sufficiently hard to crush rock encountered in the drilling of the hole through the rock formation.
Claim 4
Dependent Claim
36 words
A stabilizer-reamer as defined in claim 1 wherein means (c) has thereon a plurality of discretely disposed elements which are sufficiently hard to crush rock encountered in the drilling of the hole through the rock formation.
Claim 5
Dependent Claim
15 words
A stabilizer-reamer as defined in claim 2 or 3 wherein the hardened elements are tungsten-carbide.
Claim 6
Dependent Claim
16 words
A stabilizer-reamer as defined in claim 2 or 3 wherein the hardened elements are industrial diamond.
Claim 7
Dependent Claim
31 words
A stabilizer-reamer as defined in claim 1 or 2 wherein at least one spiral groove exists in and interconnects the surfaces of the stabilizer means (a) and the reamer means (b).
Claim 8
Dependent Claim
108 words
A stabilizer-reamer as defined in claim 1 wherein the stabilizer means (a) is generally cylindrical in shape, the reamer means (b) adjoins the stabilizer means, is generally cylindrical in shape, and has the same axis as the stabilizer means (a), the radius of the reamer means (b) being undersized relative to the radius of the stabilizer means (a), and the reamer means (b) having disposed on the curved surface thereof at least one hardened particle which extends radially to an extent that the combined radius of the curved surface of the reamer means (b) and the hardened particle is equal to the radius of the stabilizer means (a).
Claim 9
Dependent Claim
24 words
A stabilizer-reamer as defined in claim 7 wherein a plurality of hardened elements are disposed on the curved surface of the reamer means (b).
Claim 10
Dependent Claim
54 words
A stabilizer-reamer as defined in claim 1, 7 or 8 wherein the grinding means (c) adjoins the reamer means (b) on the side removed from the stabilizer means (a), has a surface which is bevelled relative to the curved surface of the reamer means (b) and has disposed thereon at least one hardened element.
Claim 11
Dependent Claim
19 words
A stabilizer-reamer as defined in claim 1, 7 or 8 wherein the stabilizer means (a) has a hardened surface.
Claim 12
Dependent Claim
26 words
A stabilizer-reamer as defined in claim 1, 7 or 8 wherein the surface of the reamer means (b) has at least one hardened element embedded therein.
Claim 13
Dependent Claim
40 words
A stabilizer-reamer as defined in claim 1, 7 or 8 wherein the surface of the reamer means (b) has at least one hardened element embedded therein, the surface of which is flush with the surface of the stabilizer means (a).
References Cited (Backward Citations)
US3180439A
Cited
US3712392A
Cited
US3833077A
Cited
US3885637A
Cited
US3978993A
Cited
US4043611A
Cited
US4273159A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-05-30 | 1986-11-29 | 1987-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-30 | 1990-11-29 | 1991-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-30 | 1994-11-29 | 1995-05-31 | $7700.00 | Window Closed / Lapsed |