Patent US4460053A successfully refreshed from Google Patents.
US4460053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill tool for deep wells
Assignee: Baker Hughes Oilfield Operations LLC
•
Filing: 1981-08-14
•
Granted: 1984-07-17
•
Expires: 2001-08-14
Abstract
Abstract A rotary bit for oil and gas well drilling has cutting elements set in a hard facing material which in turn is supported by a sintered steel section between the hard facing and the steel base of the bit.
Inventors
- 👤 Rainer Jurgens
- 👤 Hermann Rathkamp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:33
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/56; E21B10/567; E21B10/573; E21B10/60
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
131 words
Rotary drill tool for deep well drilling, consisting of a steel connecting body which includes a threaded stud to connect with a drill bed or similar rotary drive, whose head is provided with cutting members and/or cutting coatings, which extend from the base region of the head to its central region, combined in row or strip-like protruding groups upon the external circumference and supported in a matrix bonding substance, characterized by the fact that the arrangement of the matrix bonding substance is confined with cutting members (1) and/or cutting coatings (2) in the region of the protruding strip or row-like groups, the matrix bonding substance (3) is formed as a layer and a space between the said layer and the steel connecting body (7) is provided with a sintered steel filler.
Claim 2
Dependent Claim
131 words
Rotary drill tool for deep well drilling, consisting of a steel connecting body which includes a threaded stud to connect with a drill bed or similar rotary drive, whose head is provided with cutting members and/or cutting coatings, which extend from the base region of the head to its central region, combined in row or strip-like protruding groups upon the external circumference and supported in a matrix bonding substance, characterized by the fact that the arrangement of the matrix bonding substance is confined with cutting members (1) and/or cutting coatings (2) in the region of the protruding strip or row-like groups, the matrix bonding substance (3) is formed as a layer and a space between the said layer and the steel connecting body (7) is provided with a sintered steel filler.
Claim 3
Dependent Claim
41 words
Rotary drill tool according to claim 1 characterized by the fact that the thickness of the matrix bonding substance layer is adjusted according to the degree of abrasion and erosion forces which occur at various locations of the tool during drilling.
Claim 4
Dependent Claim
58 words
Rotary drill tool, according to claim 1, characterized by the fact that passage channels for flushing liquid connected with a central hole in the steel connecting body are provided, which flow into nozzles, where the nozzles are arranged ahead of the cutting members in the rotation direction of the tool and are protected by the matrix bonding substance.
Claim 5
Dependent Claim
23 words
Rotary drill tool according to claim 3, characterized by the fact that the nozzles are shaped and formed integrally from matrix bonding substance.
Claim 6
Dependent Claim
28 words
Rotary drill tool according to claim 3, characterized by the fact that the nozzles are formed from the passage channels and have a constant cross-section over the length.
Claim 7
Dependent Claim
72 words
Rotary drill tool according to claim 1, characterized by the fact that one or more passage channels for flushing liquid are provided with a central hole into the steel connecting body, which channels flow into gutters which are open on the outside, that the drains are imbedded in the matrix bonding substance and in the filler, and thereby the layer shape of the matrix bonding substance follows the contour of the drains.
Claim 8
Dependent Claim
36 words
Rotary drill tool according to claim 1, characterized by the fact that the cutting members are formed from cutting laminae with polycrystalline sintered diamond or impregnated cutting elements, which for their part are fastened to supports.
Claim 9
Dependent Claim
42 words
Rotary drill tool according to claim 1, characterized by the fact that the cutting coatings consist of natural or synthetic or a combination of both kinds of diamond, which are impregnated into the matrix bonding substance and/or are set into its surface.
Claim 10
Dependent Claim
69 words
Rotary drill tool according to claim 1, characterized by the fact that both cutting members from cutting laminae with polycrystalline sintered diamond or impregnated cutting elements, which for their part are fastened to supports, as well as cutting members or cutting coatings of natural or synthetic or a combination of both kinds of diamond which are impregnated into the matrix bonding substance and/or set into its surface are provided.
Claim 11
Dependent Claim
45 words
Rotary drill tool according to claim 1, characterized by the fact that strips are produced on the connecting body or are recessed during the fabrication of the connecting body to enlarge the surface area usable for bonding between the steel connecting body and the filler.
Claim 12
Dependent Claim
29 words
Rotary drill tool according to claim 1, characterized by the fact that an armored lining of abrasion and erosion-resistant material is provided between the protruding strip or row-like groups.
Claim 13
Dependent Claim
33 words
Rotary drill tool according to claim 11, characterized by the fact that the armored lining is made of a hard coating which, for example, can be formed by welding, flame or plasma spraying.
References Cited (Backward Citations)
US3080009A
Cited
US3112803A
Cited
US4098363A
Cited
US4116289A
Cited
US4234048A
Cited
US4350215A
Cited
US4365679A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-17 | 1988-01-16 | 1988-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-17 | 1992-01-16 | 1992-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-17 | 1996-01-16 | 1996-07-17 | $7700.00 | Window Closed / Lapsed |