Patent US3908771A successfully refreshed from Google Patents.
US3908771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill collar incorporating device for jetting drilling fluid transversely into bore hole
Assignee: Individual
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Filing: 1974-03-01
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Granted: 1975-09-30
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Expires: 1994-03-01
Abstract
Abstract A self-stabilizing drill collar structure for incorporation into a drill string for deep well rotary drilling includes an elongated cylindrical collar member having an axially extending throughbore for passing drilling fluid downwardly to the lower end of the drill string. An arrangement of easily replaceable and non-fouling nozzles located within slots and protected by the wall of the collar serve to divert clean downwardly flowing drilling fluid from the axial throughbore and discharge it in a jet-like manner laterally outward from the opposite ends of the slots into the annular gap between the collar and bore hole to thereby improve lubrication of the gap and provide better circulation and return of the drilling fluid to the surface for re-cycling, and which enables the drilling to take place at a higher speed and with greater accuracy and stability as regards the desired course of the bore hole. The number of nozzles in operation can be varied as desired by replacing one or more of them with plugs and the collar member can also be provided optionally with reaming flanges to shape the bore hole.
Inventors
- 👤 Wylie P Garrett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:08
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/10; E21B17/1078; E21B10/00; E21B10/26; E21B10/60; E21B17/16; E21B21/00; E21B21/08
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
130 words
A drill collar structure for incorporation into a drill string for deep well rotary drilling comprising an elongated cylindrical collar member having an axially extending throughbore for passing a drilling fluid downwardly to the lower end of the drill string, said collar member including at least one slot forming a duct extending transversely through the wall thereof intermediate said throughbore and its periphery, opposite ends of said slot reaching to the surface of said collar member at corresponding locations on the periphery thereof, and at least one nozzle member located in a bore extending transversely between said throughbore and said slot intermediate the ends of said slot for jetting drilling fluid diverted from said throughbore into said slot and thence outwardly from the opposite ends thereof into the bore hole.
Claim 2
Dependent Claim
130 words
A drill collar structure for incorporation into a drill string for deep well rotary drilling comprising an elongated cylindrical collar member having an axially extending throughbore for passing a drilling fluid downwardly to the lower end of the drill string, said collar member including at least one slot forming a duct extending transversely through the wall thereof intermediate said throughbore and its periphery, opposite ends of said slot reaching to the surface of said collar member at corresponding locations on the periphery thereof, and at least one nozzle member located in a bore extending transversely between said throughbore and said slot intermediate the ends of said slot for jetting drilling fluid diverted from said throughbore into said slot and thence outwardly from the opposite ends thereof into the bore hole.
Claim 3
Dependent Claim
31 words
A drill collar structure as defined in claim 1 wherein each slot is provided with a plurality of nozzle members arranged in spaced relation in the longitudinal direction of the collar.
Claim 4
Dependent Claim
33 words
A drill collar structure as defined in claim 1 wherein the transverse bore in which said nozzle member is received extends in a radial direction and intersects the slot at the middle thereof.
Claim 5
Dependent Claim
60 words
A drill collar structure as defined in claim 1 and which is incorporated into the drill string at the bottom thereof to serve as a pilot, one end of said collar having the drill bit secured thereto and the opposite end thereof being proVided with means for connection to the adjoining end of the next-above section of the drill string.
Claim 6
Dependent Claim
34 words
A drill collar structure as defined in claim 1 and which is provided with connection means at each end thereof for incorporation into the drill string above the lowermost section mounting the drill bit.
Claim 7
Dependent Claim
27 words
A drill collar structure as defined in claim 1 and which includes a plurality of said slots and nozzle members therein spaced longitudinally along the collar member.
Claim 8
Dependent Claim
29 words
A drill collar structure as defined in claim 1 which includes a plurality of said slots and nozzle members associated therewith disposed symmetrically about the axis of the collar.
Claim 9
Dependent Claim
29 words
A drill collar structure as defined in claim 7 which includes two of said slots and nozzle members associated therewith located symmetrically to opposite sides of the collar axis.
Claim 10
Dependent Claim
39 words
A drill collar structure as defined in claim 1 wherein said nozzle member includes an externally threaded barrel portion engageable with an internally threaded portion of said transverse bore thereby to facilitate installation and removal of said nozzle member.
Claim 11
Dependent Claim
45 words
A drill collar structure as defined in claim 9 and which is also provided with a threaded plug for use in lieu of a threaded nozzle to close off said transverse bore and block flow of drilling fluid therethrough when jetting action is not desired.
Claim 12
Dependent Claim
36 words
A drill collar structure as defined in claim 1 and wherein said collar member is provided with flanges extending radially at the location of said slots for effecting a reaming action to shape the bore hole.
Claim 13
Dependent Claim
69 words
A drill collar structure as defined in claim 11 wherein said reaming flanges are arranged in uniform spaced relation around the periphery of the collar member and include apertures therethrough from one side to the other for reducing the turning resistance of the collar through the annular column of drilling fluid which is returned to the surface in the annular space between the drill collar and the bore hole.
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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 |