Title:
SYSTEM AND METHOD FOR ENGAGING AND DISENGAGING DRILL BIT OR OTHER DEVICE TO DOWNHOLE DRIVE SYSTEM
Document Type and Number:
WIPO Patent Application WO/2017/074259
Kind Code:
A8
Abstract:
A drive system housing is provided with an engagement-disengagement mechanism that is advantageous to connect (make up) or disconnect (break out) drill bit or other device connection from the drive system housing. The drive system housing comprises: an upper housing and a lower housing connected thereto by a threaded connection provided at a first end of the lower housing, wherein the upper and the lower housing define an axis; and a plurality of castellations projecting substantially axially from a second end of the lower housing and circumferentially spaced around the axis, wherein at least partially unscrewing the threaded connection is configured to cause axial displacement of the lower housing towards a drive shaft which is coaxially positioned within the upper and the lower housing,and wherein the axial displacement of the lower housing towards the drive shaft is configured to compel the castellations of the lower housing into mating engagement with complementary castellations provided at the drive shaft.
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Inventors:
MORIN ANDREW DAVID (AU)
RAFFAN PETER JAMES LOCHORE (SG)
RAFFAN PETER JAMES LOCHORE (SG)
Application Number:
PCT/SG2016/050521
Publication Date:
November 09, 2017
Filing Date:
October 25, 2016
Export Citation:
Assignee:
TURBODYNAMICS PTE LTD (SG)
International Classes:
E21B19/18; E21B4/00; E21B7/06; E21B17/20; E21B19/16; E21B23/02
Attorney, Agent or Firm:
AMICA LAW LLC (SG)
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