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US7410013: Boring and drilling apparatus

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Filing Information

Inventor(s) Hugh Edward Fisher ·
Assignee(s) Wave Craft Limited ·
Attorney/Agent(s) Steptoe & Johnson LLP ·
Primary Examiner Richard E. Chilcot, Jr. ·
Assistant Examiner Matt J Smith ·
Application Number US10450066
Filing date 12/03/2001
PCT 371 date 03/15/2004
Issue date 08/12/2008
Prior Publication Data
Predicted expiration date 12/03/2021
U.S. Classifications 175/106  · 175/417  · 175/415  · 175/319  · 175/418  · 175/298  ·
International Classifications E21B410  ·
Kind CodeB2
PCT Application Number WO20PCTGB0105331 - 12/03/2001
PCT Publication Number WO200246564 - 06/13/2002
Foreign Priority GB0030134.1 - 12/09/2000 · GB0121654.8 - 09/07/2001 ·
55 Claims, 11 Drawings


Abstract

An apparatus (10) for use in boring is described, the apparatus including a rotatable drive shaft (12), a cam member (20) and followers (16) for converting rotational motion into reciprocal motion, and a shroud (24) having a cutting edge (26) driven by the cam member and followers. The shroud may be selectively engageable with the cam member and followers, allowing the drive shaft to be removed through the shroud. A fluid circulation arrangement (31), (13) allows air to be injected into loose drilling substrate, so assisting removal of drill cuttings from the boring apparatus. Also described is a drill string incorporating a similar arrangement, allowing the drill string to be reciprocated within a bore. The drill string may further include casing sections, which may have intumescent coatings to allow the sections to be fixed in a wellbore.

Independent Claims | See all claims (55)

  1. 1. A boring apparatus for boring a borehole, the apparatus comprising: a rotatable drive shaft; a boring member comprising a tubular member; a mechanism for converting rotational motion of the drive shaft into longitudinal reciprocal motion of the boring member; and a rotational boring device provided ahead of the boring member, the rotational boring device being driven, in use, by the drive shaft; wherein a leading end of the tubular member tapers from a main body portion of the tubular member to a peripherally extending leading edge thereof, and the leading edge comprises a cutting edge, which, in use, drills an outer circumference of the borehole.
  2. 5. A boring apparatus comprising: a rotatable drive shaft; a boring member comprising a tubular member; a mechanism for converting rotational motion of the drive shaft into longitudinal reciprocal motion of the boring member; and a rotational boring device provided ahead of the boring member, the rotational boring device being driven, in use, by the drive shaft; wherein a leading end of the tubular member tapers from a main body portion of the tubular member to a peripherally extending leading edge thereof; wherein the boring member further comprises a body mounted on the drive shaft; and wherein the body is rigidly connected to the tubular member by one or more radially extending members.
  3. 6. A boring apparatus comprising: a rotatable drive shaft; a boring member comprising a tubular member; a mechanism for converting rotational motion of the drive shaft into longitudinal reciprocal motion of the boring member; and a rotational boring device provided ahead of the boring member, the rotational boring device being driven, in use, by the drive shaft; wherein a leading end of the tubular member tapers from a main body portion of the tubular member to a peripherally extending leading edge thereof; wherein the boring member further comprises a body mounted on the drive shaft; and wherein the body and tubular member are arranged to engage or remain engaged on rotation of the body in a first direction, and disengage on rotation of the body in a second direction.
  4. 8. A boring apparatus comprising: a rotatable drive shaft; a boring member comprising a tubular member; a mechanism for converting rotational motion of the drive shaft into longitudinal reciprocal motion of the boring member; and a rotational boring device provided ahead of the boring member, the rotational boring device being driven, in use, by the drive shaft; wherein the mechanism for converting rotational motion of the drive shaft to longitudinal motion of the boring member comprises at least one cam track arrangement on one of the drive shaft and boring member, and at least one corresponding cam follower member on the other of the drive shaft and the boring member.
  5. 15. A boring apparatus comprising: a rotatable drive shaft; a boring member comprising a tubular member; a mechanism for converting rotational motion of the drive shaft into longitudinal reciprocal motion of the boring member; and a rotational boring device provided ahead of the boring member, the rotational boring device being driven, in use, by the drive shaft; wherein the rotational boring device is adjustable to a position in which the radius of the rotational boring device is less than the radius of the boring member.
  6. 17. An apparatus for boring, the apparatus comprising: a rotatable drive shaft; a drive mechanism for rotating the drive shaft; a first drilling member comprising an annular shroud, the first drilling member being mounted on the drive shaft by a mounting arrangement, the mounting arrangement comprising a mechanism for converting at least some of the rotary motion of the drive shaft into reciprocal motion of the first drilling member; a second drilling member arranged to extend beyond the first drilling member, the second drilling member being rotatably drivable by the drive shaft; and a fluid circulation arrangement for supplying fluid to the first drilling member and removing fluid therefrom.
  7. 39. A drill string assembly comprising: a rotatable drive shaft; a drive device for rotating the drive shaft; a tubular shroud; and a mounting device for selectively mounting the tubular shroud to the drive shaft, wherein the mounting device converts at least some rotary motion of the drive shaft to reciprocal motion of the tubular shroud; a drilling member in the form of a drill head extending beyond and before the tubular shroud, the drilling member being rotatably drivable by the drive shaft; and a fluid circulation arrangement for supplying fluid to the tubular shroud and removing fluid therefrom.
  8. 43. A drill string assembly comprising: a rotatable drive shaft; a drive device for rotating the drive shaft; a tubular shroud; and a mounting device for selectively mounting the tubular shroud to the drive shaft, wherein the mounting device converts at least some rotary motion of the drive shaft to reciprocal motion of the tubular shroud; and a drilling member in the form of a drill head extending beyond and before the tubular shroud; wherein the drill head is selectively movable between a first position of substantially the same radius as the tubular shroud, and a second position of lesser radius than the tubular shroud.
  9. 45. A drill string assembly comprising: a rotatable drive shaft; a drive device for rotating the drive shaft; a tubular shroud; and a mounting device for selectively mounting the tubular shroud to the drive shaft, wherein the mounting device converts at least some rotary motion of the drive shaft to reciprocal motion of the tubular shroud; a drilling member in the form of a drill head extending beyond and before the tubular Shroud; and one or more casing sections; wherein the casing sections include precast concrete or similar coatings.
  10. 46. A drill string assembly comprising: a rotatable drive shaft; a drive device for rotating the drive shaft; a tubular shroud; and a mounting device for selectively mounting the tubular shroud to the drive shaft, wherein the mounting device converts at least some rotary motion of the drive shaft to reciprocal motion of the tubular shroud; a drilling member in the form of a drill head extending beyond and before the tubular Shroud; and one or more casing sections; further comprising intumescent coatings on selected portions of the casing sections.
  11. 51. A method of drilling and casing a wellbore, the method comprising the steps of: running a drill string assembly into a bore, the assembly comprising a rotatable drive shaft, a drive device for rotating the drive shaft, a tubular shroud, a mounting device for selectively mounting the tubular shroud to the drive shaft and for convening at least some of the rotary motion of the drive shaft to reciprocal motion of the tubular shroud, and a drilling member in the form of a drill head extending beyond and before the tubular shroud; running at least one casing section into the bore on the drill string assembly; unmounting the tubular shroud from the drive shaft; and removing the drilling member and the drive shaft from the bore, to leave the tubular shroud and the casing sections in the bore.
  12. 52. A boring apparatus comprising: a rotatable drive shaft; a boring member; and a mechanism for convening rotational motion of the drive shaft into longitudinal reciprocal motion of the boring member; wherein the mechanism for convening rotational motion of the drive shaft into longitudinal reciprocal motion of the boring member comprises at least one cam track arrangement on one of the drive shaft and the boring member, and at least one corresponding cam follower member on the other of the drive shaft and the boring member; wherein the at least one cam track arrangement is substantially sinusoidal in shape.
  13. 53. An apparatus for boring, the apparatus comprising: a rotatable drive shaft; a drive mechanism for rotating the drive shaft; a drilling member mounted on the drive shaft by a mounting arrangement, the mounting arrangement comprising a mechanism for converting at least some rotary motion of the drive shaft into reciprocal motion of the drilling member; and a fluid circulation arrangement for supplying fluid to the drilling member and removing fluid therefrom; wherein the fluid circulation arrangement comprises a fluid delivery conduit extending to the drilling member, and a fluid removal conduit extending from the drilling member, wherein the fluid delivery conduit comprises one or more fluid delivery ports for permitting escape of fluid from the fluid delivery conduit to environment of the drilling member, the fluid delivery ports being directed rearwardly with respect to a direction of fluid delivery flow.
  14. 54. A drill string assembly comprising: a rotatable drive shaft; a drive device for rotating the drive shaft; a tubular shroud; a mounting device for selectively mounting the tubular shroud to the drive shaft; one or more casing sections comprising intumescent coatings on selected portions thereof, the intumescent coatings being selected to intumesce at a selected predetermined temperature; and a heating device for heating the intumescent coatings, the heating device comprising heating elements embedded in the intumescent coatings, and operable from surface.
  15. 55. A drill string assembly comprising: a rotatable drive shaft; a drive device for rotating the drive shaft; a tubular shroud; a mounting device for selectively mounting the tubular shroud to the drive shaft; and one or more casing sections comprising intumescent coatings on selected portions thereof, the intumescent coatings being provided adjacent joints configured to be disposed between successive casing sections.

References Cited

U.S. Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
US1607082 Howcott Nov 1926
US1741497* BOLTZ FRED S Boltz Dec 1929
US2120240 CHAPPELL JAMES F Chappell Jun 1938
US2634951* SNYDER OIL TOOL CORP Snyder Apr 1953
US2713992 SNYDER OIL TOOL CORP Snyder Jul 1955
US2877984* CAUSEY OTIS A Causey Mar 1959
US2950087* GREGORY JAMES N Gregory Aug 1960
US3918523* STUBER IVAN L Stuber Nov 1975
US3934066 W. R. Grace & Co. Murch Jan 1976
US4024919* Exxon Production Research Company Pujol May 1977
US4253531 BOROS LADISLAV J Boros Mar 1981
US4890676* Caledonian Mining Co. Ltd. Mason Jan 1990
US5156223* HIPP JAMES E Hipp Oct 1992

Foreign Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
DE3200881SAARBERG INTERPLAN GMBHJul 1983
EP0391161TRACTO-TECHNIK PAUL SCHMIDT, MASCHINENFABRIK KGOct 1990
GB725175CHARLES JOHN DURHAM CARRUTHERSMar 1955
WO200214028FISHER POWER WAVE LIMITEDFeb 2002
* cited by examiner

Referenced By

Document NumberAssigneeInventorsIssue/Pub Date
US8857623 --