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:
Feb. 26, 2008
Filed:
Apr. 11, 2005
Chen-kang D. Chen, Houston, TX (US);
M. Vikram Rao, Houston, TX (US);
Chen-Kang D. Chen, Houston, TX (US);
M. Vikram Rao, Houston, TX (US);
Halliburton Energy Services, Inc., Houston, TX (US);
Abstract
A borehole may be drilled utilizing the bottom hole assemblywith a downhole motor, which may offset at a selected bend angle. A bend for directional drilling may be provided by a PDM, or by a RSD. A gauge sectionsecured to the pilot bithas a uniform diameter bearing surface along an axial length of at least 60% of the pilot bit diameter. The bit or reamerhas a bit face defining the cutting diameter of the drilled hole. The axial spacing between the bend and the bit face is controlled to less than fifteen times the bit diameter. The downhole motor, pilot bit and bit may be retrieved from the well while leaving the casing string in the well.