Patent US3618682A successfully refreshed from Google Patents.
US3618682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for drilling
Assignee: Sunoco Inc
•
Filing: 1969-10-24
•
Granted: 1971-11-09
•
Expires: 1989-10-24
Abstract
Abstract A drill bit constructed to provide the simultaneous action of bit teeth mechanically moving the formation and a hydraulic force aiding the movement which is accomplished by channeling fluid down the drill bit cone shank through passages on the face of the cone, and inwardly between the teeth which are in contact with the formation.
Inventors
- 👤 John D Bennett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:02
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/08; E21B10/18; E21B21/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
61 words
A drill bit for use in drilling into earthlike formations comprising: at least one shank with a cone attached thereto, said cone having a plurality of teeth thereon; and means for providing a substantially confined cuttings removal fluid flow path having an exit directly between adjacent teeth of the cone when said adjacent teeth are in contact with said earthlike formation.
Claim 2
Dependent Claim
30 words
The drill bit of claim 2 wherein the fluid flow path means includes a passageway located in the upper portion of each shank extending through the wall of the shank.
Claim 3
Dependent Claim
27 words
The drill bit of claim 3 wherein the fluid flow path includes a channel extending from the exit of said passageway to a point adjacent the cone.
Claim 4
Dependent Claim
52 words
The drill bit of claim 3 wherein the edge portion of the cone located adjacent to the shank is grooved between adjacent teeth of each cone so that the channel located on the shank is aligned with said groove between adjacent teeth when said teeth are in contact with the earthlike formation.
Claim 5
Dependent Claim
65 words
A drill bit for use in drilling into earthlike formations including: at least one shanklike protrusion; a cutter attaChed to each shank with adjacent teeth thereon; means to direct a cuttings removal fluid through the wall of the shanklike protrusion; and channel means on said protrusion to direct said fluid to a point between that shank''s adjacent cutter teeth in contact with said earthlike formations.
Claim 6
Dependent Claim
93 words
A drill bit for use in drilling into earthlike formations comprising: a hollow body with a shank formed in the lower portion thereof; a journal formed in the lower portion of said shank; a cone with teeth thereon attached to the journal; means to pass a fluid from the interior to the exterior of the body, forming a fluids exit on the body; and means to direct the flow of fluid from the exit on the body down the shank to a point adjacent the cone teeth in contact with the earthlike formations.
Claim 7
Dependent Claim
56 words
The drill bit of claim 7 wherein the means to direct the flow of fluid down the shank consists of a channel extending vertically along the outside of the shank and together with the borehole forms a substantially enclosed passageway from said fluids exit to a point adjacent the teeth in contact with the earthlike formation.
Claim 8
Dependent Claim
34 words
The drill bit of claim 8 wherein the means to pass a fluid from the interior of the body to the exterior of the body comprises an opening through the wall of the body.
Claim 9
Dependent Claim
41 words
The drill bit of claim 9 wherein the opening is aligned with the channel in the shank so as to provide a continuous path for fluids from the interior of the body to the teeth in contact with the earthlike formations.
Claim 10
Independent Claim
62 words
The method of removing cuttings from a well comprising: pumping drilling fluid down the interior of drill pipe to a drill bit, and passing the drilling fluid out of the drill bit and through a substantially enclosed passageway to a point adjacent the cutting edge of the drill bit when said edge is in position for contacting the formation to be cut.
Claim 11
Dependent Claim
45 words
The method of claim 11 including moving the drilling fluid through the wall of the drill bit housing and down each shank of the bit to a point between the teeth of each shank which are positioned for contact with the bottom of the borehole.
Claim 12
Independent Claim
73 words
The method of removing cuttings from a wellbore comprising: pumping drilling fluid through the drill pipe to a drill bit; passing said drilling fluid through a substantially enclosed passageway formed by a channel in the exterior wall of the drill bit and the formation wall; and subsequently directing the drilling fluid substantially laterally between the drill bit teeth engaging the formation by said fluid deflecting against the sidewall and bottom of the formation.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |