Title:
METHOD FOR OPTIMIZING THE BIT DESIGN FOR A WELL BORE
Document Type and Number:
WIPO Patent Application WO2001033027
Kind Code:
A3
Abstract:
A drill bit is designed to achieve optimum performance in a specified drilling application defined by the drilling system, the formation to be drilled and the configuration of the bore hole. A depth of cut versus predicted torque for a basic bit configuration is evaluated (Fig. 1) for different configurations of the drill bit. A computer modeling program is used to obtain the predicted torque for the basic bit configuration, and its modifications (Fig. 2). Features of the bit design are changed to achieve the lowest predicted torque for an optimum depth of cut. Presenting the computer analysis as depth of cut versus predicted torque for the bit design simplifies the design selection process. The formation being drilled may be evaluated by comparing actual torque with predicted torque for a given rate of penetration (Fig. 3). The evaluation can be used to confirm the computer model and determine formation properties.
Inventors:
GLASS KEVIN L
Application Number:
PCT/US2000/041829
Publication Date:
May 02, 2002
Filing Date:
November 03, 2000
Export Citation:
Assignee:
HALLIBURTON ENERGY SERV INC (US)
International Classes:
E21B10/00; E21B41/00; E21B44/00; (IPC1-7): G06F17/50
Foreign References:
| US6233524B1 | 2001-05-15 | |||
| US6213225B1 | 2001-04-10 | |||
| US6169967B1 | 2001-01-02 | |||
| US6021859A | 2000-02-08 | |||
| US5787022A | 1998-07-28 |
Other References:
G.P. HANCKE ET AL.: "A control system for optimizing deep hole drilling conditions", 1991 INTERNATIONAL CONFERENCE ON INDUSTRIAL ELECTRONICS, CONTROL AND INSTRUMENTATION, 1991, pages 2279 - 2284, XP002949278
HANCKE G.P.: "The effective control of a deep hole diamond drill", CONFERENCE RECORD OF THE INDUSTRY APPLICATIONS SOCIETY ANNUAL MEETING, IEEE, 1991, pages 1200 - 1205, XP002949277
SHERRATT R.S.: "Use of the LMS adaptive signal processing technique to improve signal data rates from practical oil well logging equipment", INTERNATIONAL CONFERENCE ON SIMULATION '98, 1998, pages 350 - 353, XP002949276
HANCKE G.P.: "The effective control of a deep hole diamond drill", CONFERENCE RECORD OF THE INDUSTRY APPLICATIONS SOCIETY ANNUAL MEETING, IEEE, 1991, pages 1200 - 1205, XP002949277
SHERRATT R.S.: "Use of the LMS adaptive signal processing technique to improve signal data rates from practical oil well logging equipment", INTERNATIONAL CONFERENCE ON SIMULATION '98, 1998, pages 350 - 353, XP002949276
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