Patents by Inventor Chen-Kang D. Chen
Chen-Kang D. Chen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 7621343Abstract: A bottom hole assembly 10 for drilling a deviated borehole includes a positive displacement motor (PDM) 12 or a rotary steerable device (RSD) 110 having a substantially uniform diameter motor housing outer surface without stabilizers extending radially therefrom. In a PDM application, the motor housing 14 may have a fixed bend therein between an upper power section 16 and a lower bearing section 18. The long gauge bit 20 powered by the motor 10 may have a bit face 22 with cutters 28 thereon and a gauge section 24 having a uniform diameter cylindrical surface 26. The gauge section 24 preferably 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.Type: GrantFiled: July 24, 2006Date of Patent: November 24, 2009Assignee: Halliburton Energy Services, Inc.Inventors: Chen-Kang D. Chen, Thomas M. Gaynor, Daniel D. Gleitman, John R. Hardin, Jr., Colin Walker, M. Vikram Rao, Roger Boulton
-
Patent number: 7334649Abstract: A borehole may be drilled utilizing the bottom hole assembly 10, 50 with a downhole motor 14, 110, 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 section 36 secured to the pilot bit 18 has a uniform diameter bearing surface along an axial length of at least 60% of the pilot bit diameter. The bit or reamer 16 has 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.Type: GrantFiled: April 11, 2005Date of Patent: February 26, 2008Assignee: Halliburton Energy Services, Inc.Inventors: Chen-Kang D. Chen, M. Vikram Rao
-
Patent number: 7213643Abstract: A borehole may be drilled utilizing the bottom hole assembly 10, 50 with a downhole motor 14, which may offset at a selected bend angle. A gauge section 34 is secured to the bit 16 has a uniform diameter bearing surface along an axial length of at least 60% of the bit diameter. The axial spacing between the bend and the bit face is controlled to less than fifteen times the bit diameter. After drilling a section of the well with the BHA according to the present invention, a tubular may be inserted in the well by passing the tubular through an upper tubular, then the inserted tubular expanded while downhole to a diameter substantially equal to the expanded tubular.Type: GrantFiled: April 23, 2003Date of Patent: May 8, 2007Assignee: Halliburton Energy Services, Inc.Inventors: Chen-Kang D. Chen, Daniel D. Gleitman, M. Vikram Rao
-
Patent number: 7147066Abstract: A bottom hole assembly 10 for drilling a deviated borehole includes a positive displacement motor (PDM) 12 or a rotary steerable device (RSD) 110 having a substantially uniform diameter motor housing outer surface without stabilizers extending radially therefrom. In a PDM application, the motor housing 14 may have a fixed bend therein between an upper power section 16 and a lower bearing section 18. The long gauge bit 20 powered by the motor 10 may have a bit face 22 with cutters 28 thereon and a gauge section 24 having a uniform diameter cylindrical surface 26. The gauge section 24 preferably 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.Type: GrantFiled: August 29, 2002Date of Patent: December 12, 2006Assignee: Halliburton Energy Services, Inc.Inventors: Chen-Kang D. Chen, Thomas M. Gaynor, Daniel D. Gleitman, John R. Hardin, Jr., Colin Walker, M. Vikram Rao, Roger Boulton
-
Patent number: 6877570Abstract: A borehole may be drilled utilizing the bottom hole assembly 10, 50 with a downhole motor 14, which may offset at a selected bend angle. The motor housing is preferably run slick, and a gauge section 36 secured to the pilot bit 18 has a uniform diameter bearing surface along an axial length of at least 60% of the pilot bit diameter. The bit or reamer 16 has 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.Type: GrantFiled: December 16, 2002Date of Patent: April 12, 2005Assignee: Halliburton Energy Services, Inc.Inventors: Chen-Kang D. Chen, M. Vikram Rao
-
Patent number: 6848518Abstract: A steerable bottom hole assembly may be used for drilling both a curved section and straight section of the borehole, with the bottom hole assembly including a reamer beneath the downhole motor 12. The bottom hole assembly includes a bit 30 having a bit face defining a bit diameter, and a gauge section 32 having a substantially uniform diameter cylindrical surface approximating the bit diameter and having an axially length of at least 75% of the bit diameter. The motor is preferably run slick without stabilizers for engaging the wall of the borehole.Type: GrantFiled: October 28, 2002Date of Patent: February 1, 2005Assignee: Halliburton Energy Services, Inc.Inventors: Chen-Kang D. Chen, William H. Smith, Jr.
-
Publication number: 20040211570Abstract: A borehole may be drilled utilizing the bottom hole assembly 10, 50 with a downhole motor 14, which may offset at a selected bend angle. A gauge section 34 is secured to the bit 16 has a uniform diameter bearing surface along an axial length of at least 60% of the bit diameter. The axial spacing between the bend and the bit face is controlled to less than fifteen times the bit diameter. After drilling a section of the well with the BHA according to the present invention, a tubular may be inserted in the well by passing the tubular through an upper tubular, then the inserted tubular expanded while downhole to a diameter substantially equal to the expanded tubular.Type: ApplicationFiled: April 23, 2003Publication date: October 28, 2004Inventors: Chen-Kang D. Chen, Daniel D. Gleitman, M. Vikram Rao
-
Publication number: 20040112639Abstract: A borehole may be drilled utilizing the bottom hole assembly 10, 50 with a downhole motor 14, which may offset at a selected bend angle. The motor housing is preferably run slick, and a gauge section 36 secured to the pilot bit 18 has a uniform diameter bearing surface along an axial length of at least 60% of the pilot bit diameter. The bit or reamer 16 has 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.Type: ApplicationFiled: December 16, 2002Publication date: June 17, 2004Inventors: Chen-Kang D. Chen, M. Vikram Rao
-
Publication number: 20040099444Abstract: A steerable bottom hole assembly may be used for drilling both a curved section and straight section of the borehole, with the bottom hole assembly including a reamer beneath the downhole motor 12. The bottom hole assembly includes a bit 30 having a bit face defining a bit diameter, and a gauge section 32 having a substantially uniform diameter cylindrical surface approximating the bit diameter and having an axially length of at least 75% of the bit diameter. The motor is preferably run slick without stabilizers for engaging the wall of the borehole.Type: ApplicationFiled: October 28, 2002Publication date: May 27, 2004Inventors: Chen-Kang D. Chen, William H. Smith
-
Patent number: 6581699Abstract: A bottom hole assembly 10 for drilling a deviated borehole includes a positive displacement motor (PDM) 12 or a rotary steerable device (RSD) 110 having a substantially uniform diameter motor housing outer surface without stabilizers extending radially therefrom. In a PDM application, the motor housing 14 may have a fixed bend therein between an upper power section 16 and a lower bearing section 18. The long gauge bit 20 powered by the motor 10 may have a bit face 22 with cutters 28 thereon and a gauge section 24 having a uniform diameter cylindrical surface 26. The gauge section 24 preferably 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.Type: GrantFiled: August 21, 1999Date of Patent: June 24, 2003Assignee: Halliburton Energy Services, Inc.Inventors: Chen-Kang D. Chen, Thomas M. Gaynor, Daniel D. Gleitman, John R. Hardin, Jr., Colin Walker, M. Vikram Rao, Roger Boulton
-
Publication number: 20030010534Abstract: A bottom hole assembly 10 for drilling a deviated borehole includes a positive displacement motor (PDM) 12 or a rotary steerable device (RSD) 110 having a substantially uniform diameter motor housing outer surface without stabilizers extending radially therefrom. In a PDM application, the motor housing 14 may have a fixed bend therein between an upper power section 16 and a lower bearing section 18. The long gauge bit 20 powered by the motor 10 may have a bit face 22 with cutters 28 thereon and a gauge section 24 having a uniform diameter cylindrical surface 26. The gauge section 24 preferably 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.Type: ApplicationFiled: August 29, 2002Publication date: January 16, 2003Inventors: Chen-Kang D. Chen, Thomas M. Gaynor, Daniel D. Gleltman, John R. Hardin, Colin Walker, M. Vikram Rao, Roger Boulton
-
Patent number: 6470977Abstract: A steerable bottom hole assembly may be used for drilling both a curved section and straight section of the borehole, with the bottom hole assembly including a reamer beneath the downhole motor 12. The bottom hole assembly includes a bit 30 having a bit face defining a bit diameter, and a gauge section 32 having a substantially uniform diameter cylindrical surface approximating the bit diameter and having an axially length of at least 75% of the bit diameter. The motor is preferably run slick without stabilizers for engaging the wall of the borehole.Type: GrantFiled: September 18, 2001Date of Patent: October 29, 2002Assignee: Halliburton Energy Services, Inc.Inventors: Chen-Kang D. Chen, William H. Smith, Jr.
-
Patent number: 6269892Abstract: A bottom hole assembly 10 for drilling a deviated borehole includes a positive displacement motor 12 having a substantially uniform diameter motor housing outer surface without stabilizers extending radially therefrom. The motor housing 14 has a fixed bend therein between an upper power section 16 and a lower bearing section 18. The long gauge bit 20 powered by the motor 10 has a bit face 22 with cutters 28 thereon and a gauge section 24 having a uniform diameter cylindrical surface 26. The gauge section 24 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 is less than ten times the bit diameter. According to the method of the present invention, fluid is pumped through the downhole motor to rotate the bit at a speed of less than 350 rpm. A substantial portion of the curved borehole section may be drilled while sliding rather than rotating the motor housing.Type: GrantFiled: December 21, 1998Date of Patent: August 7, 2001Assignee: Dresser Industries, Inc.Inventors: Roger Boulton, Chen-Kang D. Chen, Thomas C. Gaynor, M. Vikram Rao