Patent US3746108A successfully refreshed from Google Patents.
US3746108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Focus nozzle directional bit
Assignee: Individual
•
Filing: 1971-02-25
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Granted: 1973-07-17
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Expires: 1991-02-25
Abstract
Abstract A focus nozzle directional bit according to the present invention includes a body having a central fluid conducting passage adapted to be disposed in communication with the bore of a drill string used for the drilling of a well. A plurality of branch fluid passages are formed in the body each being disposed in communication with the central fluid passage. A plurality of jet apertures are defined in the body in communication with the branch passages and are orientated to converge jets of pressurized drilling fluid outwardly and downwardly from the bit adjacent a lateral wall of the well bore for the purpose of directionally eroding the same to allow the drill bit to deviate downwardly and outwardly from the original well bore.
Inventors
- 👤 G Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:10
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/04; E21B7/06; E21B7/065; E21B10/00; E21B10/08; E21B10/18; E21B7/18
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
151 words
A drill bit for use in borehole deviation by jet deflection comprising: a body adapted for connection to a drill string; means defining a central fluid passage in said body adapted to receive drilling fluid from the interior of the drill string; a plurality of outlet orifices being disposed adjacent the lateral wall of a borehole into which said drill bit is to proceed; at least two of said plurality of outlet orifices being substantially larger than the remaining ones of said outlet orifices, thereby allowing a substantially larger volume of drilling fluid to flow from said two outlet orifices than the remaining ones of said outlet orifice, said two orifices being oriented to direct fluid flowing therefrom to converge at a point below said bit and laterally of the vertical axis of said bore; and a plurality of branch conduits placing said orifices in communication with said central fluid passage.
Claim 2
Dependent Claim
151 words
A drill bit for use in borehole deviation by jet deflection comprising: a body adapted for connection to a drill string; means defining a central fluid passage in said body adapted to receive drilling fluid from the interior of the drill string; a plurality of outlet orifices being disposed adjacent the lateral wall of a borehole into which said drill bit is to proceed; at least two of said plurality of outlet orifices being substantially larger than the remaining ones of said outlet orifices, thereby allowing a substantially larger volume of drilling fluid to flow from said two outlet orifices than the remaining ones of said outlet orifice, said two orifices being oriented to direct fluid flowing therefrom to converge at a point below said bit and laterally of the vertical axis of said bore; and a plurality of branch conduits placing said orifices in communication with said central fluid passage.
Claim 3
Dependent Claim
41 words
A drill bit as recited in claim 1; said branch conduits communicating said two of said plurality of outlet orifices with said central fluid passage being of substantially larger dimension than the dimension of the remaining ones of said branch passages.
Claim 4
Independent Claim
147 words
A method of forming a directionally deviated well bore in an earth formation comprising the steps of: conducting a rotary drilling operation to define a well bore extending substantially straight to a depth in the formation where deviation of the well bore is desired; bringing a plurality of jets of pressurized drilling fluid to bear upon said formation causing fluid erosion of the formation, at least two of said jets being substantially larger than the remainder of said jets and being oriented to converge at a point downwardly and outwardly with respect to said drilled bore to form an eroded bore inclined downwardly and outwardly from the path of the drilled bore; lowering a rotary drilling bit into said eroded downwardly and outwardly inclining well bore; and rotating the rotary drilling bit and drilling a substantially straight deviated bore following the path defined by the eroded bore.
Claim 5
Independent Claim
147 words
A method of forming a directionally deviated well bore in an earth formation comprising the steps of: conducting a rotary drilling operation to define a well bore extending substantially straight to a depth in the formation where deviation of the well bore is desired; bringing a plurality of jets of pressurized drilling fluid to bear upon said formation causing fluid erosion of the formation, at least two of said jets being substantially larger than the remainder of said jets and being oriented to converge at a point downwardly and outwardly with respect to said drilled bore to form an eroded bore inclined downwardly and outwardly from the path of the drilled bore; lowering a rotary drilling bit into said eroded downwardly and outwardly inclining well bore; and rotating the rotary drilling bit and drilling a substantially straight deviated bore following the path defined by the eroded bore.
Claim 6
Dependent Claim
32 words
The method of claim 3: wherein all of said plurality of jets of pressurized drilling fluid are oriented to converge at a point downwardly and outwardly with respect to said drilled bore.
Claim 7
Dependent Claim
102 words
Apparatus for producing a deviated well bore by jet erosion comprising: means for conducting pressurized drilling fluid into a well bore that has been drilled to a depth where deviation thereof is desired; means defining a plurality of jets of pressurized drilling fluid at least two of which are substantially larger than the remaining ones of said jets; means converging said two of said plurality of jets of pressurized drilling fluid downwardly and outwardly with respect to the original well bore to cause jet erosion of the formation substantially along the resultant direction defined by said two converging jets of drilling fluid.
Claim 8
Dependent Claim
102 words
Apparatus for producing a deviated well bore by jet erosion comprising: means for conducting pressurized drilling fluid into a well bore that has been drilled to a depth where deviation thereof is desired; means defining a plurality of jets of pressurized drilling fluid at least two of which are substantially larger than the remaining ones of said jets; means converging said two of said plurality of jets of pressurized drilling fluid downwardly and outwardly with respect to the original well bore to cause jet erosion of the formation substantially along the resultant direction defined by said two converging jets of drilling fluid.
Claim 9
Dependent Claim
32 words
The apparatus recited in claim 5; wherein said last mentioned means converges all of said plurality of jets of pressurized drilling fluid downwardly and outwardly with respect to said second mentioned means.
References Cited (Backward Citations)
US1784476A
Cited
US2783972A
Cited
US2785875A
Cited
US3020965A
Cited
US3144087A
Cited
US3211244A
Cited
US3207241A
Cited
US3360057A
Cited
US3563324A
Cited
US3542142A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |