US3593807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling apparatus
Assignee: Individual
•
Filing: 1969-12-11
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Granted: 1971-07-20
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Expires: 1989-12-11
Abstract
Abstract A control system for hole-drilling equipment in which a rotary drill bit and stem is rotated at a predetermined speed and the downward force exerted upon the rotary drill bit is controlled in accordance with a signal derived from the torque required to rotate the drill stem at a constant speed and a signal proportional to a desired drilling rate. Further signals proportional to the actual drilling rate and the penetration rate of the drill stem may also be utilized in relative adjustable combinations so as to provide optimum efficiency of operation.
Inventors
- 👤 Frank J Klima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:32
CPC Classifications
E; E21; E21B; E21B44/00; E21B44/02; E21B44/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
183 words
In apparatus of the class above described, the combination comprising; a. a drill stem slidably rotatably disposed on a mounting therefor, said drill stem including drill means at oNe end thereof; b. drive means, including speed controlling means, disposed on said mounting and operatively connected to rotate said drill stem; c. means connected to said drill stem and drive means for providing a first signal proportional to the torque output thereof; d. a second source of signal, said second source of signal being adjustable; e. first comparator means connected to said first and second signals for providing a third signal proportional to the deviation of said first signal from a predetermined value; f. further drive means, including control means therefor, connected to said drill stem to drive said drill stem along the axis slidably disposed on said mounting; and g. said control means including means for providing a fourth signal proportional to the force exerted upon said drill stem by said further drive means and means for controlling the energization of said further drive means in accordance with said third and fourth signals.
Claim 2
Dependent Claim
183 words
In apparatus of the class above described, the combination comprising; a. a drill stem slidably rotatably disposed on a mounting therefor, said drill stem including drill means at oNe end thereof; b. drive means, including speed controlling means, disposed on said mounting and operatively connected to rotate said drill stem; c. means connected to said drill stem and drive means for providing a first signal proportional to the torque output thereof; d. a second source of signal, said second source of signal being adjustable; e. first comparator means connected to said first and second signals for providing a third signal proportional to the deviation of said first signal from a predetermined value; f. further drive means, including control means therefor, connected to said drill stem to drive said drill stem along the axis slidably disposed on said mounting; and g. said control means including means for providing a fourth signal proportional to the force exerted upon said drill stem by said further drive means and means for controlling the energization of said further drive means in accordance with said third and fourth signals.
Claim 3
Dependent Claim
23 words
The apparatus of claim 1 in which the second signal is proportionally related to the formation in which the drill stem is operative.
Claim 4
Dependent Claim
21 words
The apparatus of claim 1 in which the fourth signal is of substantially constant magnitude with respect to the first signal.
Claim 5
Dependent Claim
33 words
The apparatus of claim 3 in which the first signal includes a further signal proportional to the rate of motion of the drill stem with respect to the longitudinal axis of the mounting.
Claim 6
Dependent Claim
33 words
The apparatus of claim 1 in which the first signal includes a further signal proportional to the rate of motion of the drill stem with respect to the longitudinal axis of the mounting.
Claim 7
Dependent Claim
23 words
The apparatus of claim 5 in which the second signal is proportionally related to the formation in which the drill stem is operative.
Claim 8
Dependent Claim
15 words
The apparatus of claim 5 in which the first signal is of substantially constant magnitude.
Claim 9
Dependent Claim
18 words
The apparatus of claim 5 in which means are provided for variably combining the first and further signal.
Claim 10
Dependent Claim
23 words
The apparatus of claim 8 in which the second signal is proportionally related to the formation in which the drill stem is operative.
Claim 11
Dependent Claim
15 words
The apparatus of claim 8 in which the first signal is of substantially constant magnitude.
References Cited (Backward Citations)
GB456447A
Cited
US3373823A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |