US3908770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods and apparatus for driving a means in a drill string while drilling
Assignee: Texaco Inc
•
Filing: 1974-05-13
•
Granted: 1975-09-30
•
Expires: 1994-05-13
Abstract
Abstract A method and at least one mechanism for carrying out the method is disclosed. A method of (1) generating time modulated torque pulses by engaging and disengaging a mud turbine driven rotating torque generator in the bottom of a wellbore, and (2) monitoring the top of the drill string for the torque pulses therein may be practiced by a mud driven turbine inertial wheel for being momentarily and precisely braked or decelerated relative to a drill collar on the lower end of a drill string in a wellbore while drilling for generating the time modulated torque pulses in the drill string for being monitored at the surface. Mechanical, electrical, and fluid operated brakes and a mud turbine driven motor are disclosed for providing power to a motor at the bottom of the drill string or for being intermittently braked rapidly for generating the torque pulses.
Inventors
- 👤 Jr Albert P Richter
- 👤 Jr William R Mcevers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:48
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/12; E21B47/14; E21B47/16; E21B4/00; E21B4/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
97 words
A method for driving a generator in the lower end of a drill string while drilling for powering a control system in the drill string comprising the steps of, a. circulating drilling mud internally of the drill string from the drill string upper end to the drill string lower end, b. rotating a vaned turbine wheel in the drill string by action of the downwardly circulating drilling mud, and c. driving a generator in the drill string with the mud driven rotating vaned turbine wheel, and d. generating electricity with said generator for powering the control system.
Claim 2
Independent Claim
97 words
A method for driving a generator in the lower end of a drill string while drilling for powering a control system in the drill string comprising the steps of, a. circulating drilling mud internally of the drill string from the drill string upper end to the drill string lower end, b. rotating a vaned turbine wheel in the drill string by action of the downwardly circulating drilling mud, and c. driving a generator in the drill string with the mud driven rotating vaned turbine wheel, and d. generating electricity with said generator for powering the control system.
Claim 3
Dependent Claim
124 words
A transmission system for driving a generator in the lower end of a drill string for powering a control system in the drill string while drilling comprising, a. pump means for circulating drilling mud from the upper end of the drill string downwardly to the drill string lower end while drilling, b. mud driven turbine wheel means in the drill string lower end connected to a generator in said drill string lower end, c. said mud driven turbine wheel means being responsive to said downwardly circulating mud in the drill string while drilling for driving said generator, d. a control system mounted in the drill string, and e. said generator being responsive to said mud driven turbine wheel means for powering said control system.
Claim 4
Dependent Claim
124 words
A transmission system for driving a generator in the lower end of a drill string for powering a control system in the drill string while drilling comprising, a. pump means for circulating drilling mud from the upper end of the drill string downwardly to the drill string lower end while drilling, b. mud driven turbine wheel means in the drill string lower end connected to a generator in said drill string lower end, c. said mud driven turbine wheel means being responsive to said downwardly circulating mud in the drill string while drilling for driving said generator, d. a control system mounted in the drill string, and e. said generator being responsive to said mud driven turbine wheel means for powering said control system.
References Cited (Backward Citations)
US2717763A
Cited
US2800296A
Cited
US2915285A
Cited
US2958821A
Cited
US2940039A
Cited
US3302457A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |