US3576222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic jet drill bit
Assignee: Gulf Research and Development Co
•
Filing: 1969-04-01
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Granted: 1971-04-27
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Expires: 1989-04-01
Abstract
Abstract A drill bit for the drilling of wells by the hydraulic jetdrilling method in which a plurality of nozzles slope downwardly through the lower end of the drill bit in a direction having a component opposite the desired direction of rotation of the drill bit. The drill bit is rotatably mounted on the lower end of the drill string whereby the drill bit rotates independently of the drill string as a result of the reaction from streams of drilling liquid discharged at high velocities from the nozzles.
Inventors
- 👤 Willard P Acheson
- 👤 Gerald H F Gardner
- 👤 Joseph H Messmer
- 👤 Michael A Torcaso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:49
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/60; E21B7/00; E21B7/18
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
32 words
A drill bit as set forth in claim 1 having 5 to 20 nozzles with the opening through the nozzles having a diameter in the range of three thirty-seconds to three-sixteenths inch.
Claim 2
Dependent Claim
48 words
A drill bit as set forth in claim 1 in which bars extend downwardly from the lower surface of the drill bit at a distance less than the standoff element and are adapted to break thin rock ridges that may extend upwardly from the bottom of the borehole.
Claim 3
Dependent Claim
38 words
A drill bit as set forth in claim 1 in which the drill bit body has a shank of smaller diameter than the drill bit body at its upper end and baffle plates extend radially from the shank.
Claim 4
Independent Claim
182 words
A method of drilling a borehole of a well in hard formations comprising rotatably suspending a drill bit on the lower end of drill pipe extending down the well, pumping a drilling liquid having an abrasive suspended therein down the drill string to the drill bit at a pressure of at least 4,000 p.s.i., discharging the drilling liquid from the drill bit at a velocity of at least about 650 feet per second through 5 to 20 nozzles having a diameter of three-sixteenths to three thirty-seconds inch positioned to discharge drilling liquid against substantially the entire bottom of the borehole and sloping downwardly through the lower end of the drill bit in a direction having a component in the direction opposite the direction of rotation of the drill bit whereby reaction from the drilling liquid rotates the drill bit at a rate of 500 to 2,000 r.p.m., supporting the drill bit on the bottom of the borehole by a standoff element extending downwardly from the center of the drill bit, and applying a weight on the bit not exceeding about 500 pounds.
References Cited (Backward Citations)
US1766487A
Cited
US2218130A
Cited
US3324957A
Cited
US3266577A
Cited
US3326607A
Cited
US3414070A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |