Invention Grant
- Patent Title: High-speed triple string drilling system
- Patent Title (中): 高速三联钻井系统
-
Application No.: US13804368Application Date: 2013-03-14
-
Publication No.: US08739902B2Publication Date: 2014-06-03
- Inventor: Robert E. Able
- Applicant: Dura Drilling, Inc.
- Applicant Address: US MT Bozeman
- Assignee: Dura Drilling, Inc.
- Current Assignee: Dura Drilling, Inc.
- Current Assignee Address: US MT Bozeman
- Agency: Goodwin Procter LLP
- Main IPC: E21B17/00
- IPC: E21B17/00

Abstract:
A drilling system for boring into ground includes a bottom hole assembly having a rotatable casing shoe, an independently rotatable driveshaft disposed within the casing shoe, and a bearing housing interdisposed between the driveshaft and the casing shoe to control a distance between a centerline of the driveshaft and a centerline of the casing shoe. The driveshaft includes a bit disposed at a distal end thereof, extending beyond the casing shoe distal end. The driveshaft centerline and the casing shoe centerline are substantially parallel and radially offset.
Public/Granted literature
- US20140041942A1 High-Speed Triple String Drilling System Public/Granted day:2014-02-13
Information query