The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 12, 2006
Filed:
Aug. 29, 2002
Chen-kang D. Chen, Houston, TX (US);
Thomas M. Gaynor, Aberdeen, GB;
Daniel D. Gleitman, Houston, TX (US);
John R. Hardin, Jr., Houston, TX (US);
Colin Walker, Couchez-de-Bearn, FR;
M. Vikram Rao, Houston, TX (US);
Roger Boulton, Mossel Bay, ZA;
Chen-Kang D. Chen, Houston, TX (US);
Thomas M. Gaynor, Aberdeen, GB;
Daniel D. Gleitman, Houston, TX (US);
John R. Hardin, Jr., Houston, TX (US);
Colin Walker, Couchez-de-Bearn, FR;
M. Vikram Rao, Houston, TX (US);
Roger Boulton, Mossel Bay, ZA;
Halliburton Energy Services, Inc., Houston, TX (US);
Abstract
A bottom hole assemblyfor drilling a deviated borehole includes a positive displacement motor (PDM)or a rotary steerable device (RSD)having a substantially uniform diameter motor housing outer surface without stabilizers extending radially therefrom. In a PDM application, the motor housingmay have a fixed bend therein between an upper power sectionand a lower bearing section. The long gauge bitpowered by the motormay have a bit facewith cuttersthereon and a gauge sectionhaving a uniform diameter cylindrical surface. The gauge sectionpreferably has an axial length at least 75% of the bit diameter. The axial spacing between the bit face and the bend of the motor housing preferably is less than twelve times the bit diameter. According to the method of the present invention, the bit may be rotated at a speed of less than 350 rpm by the PDM and/or rotation of the RSD from the surface.