Abstract: Systems and methods to determine angular offset between reference points on a drill string are achieved automatically using an electronic device, such as a handheld device. A first orientation value corresponding to the first highside reference point is obtained using the electronic device. A second a second orientation value corresponding the second highside reference point is obtained. The electronic device then calculates the angular offset between the first and second orientation values.

Abstract: A stabilizer for use in a wellbore may include a downhole tubular configured to couple to a downhole conveyance in a wellbore, as well as two or more helical blades extending radially outward from the downhole tubular. The two or more helical blades are oriented about the downhole tubular to form respective flow paths between adjacent blades. Further, each blade of the two or more helical blades may include a line-of-sight face and a gauge ramp. The line-of-sight face is formed adjacent a leading inner blade wall of the blade at a lower end of the blade and is angularly offset from the leading inner blade wall. The gauge ramp extends from an outer surface of the downhole tubular toward an outer blade surface of the blade proximate the lower end of the blade.

Abstract: Provided is a stabilizer for use in a wellbore. The stabilizer, in one example, includes a downhole tubular coupleable to a downhole conveyance in a wellbore. In accordance with this example, the stabilizer additionally includes two or more helical wellbore stabilizing elements extending radially outward from the downhole component, the two or more helical wellbore stabilizing elements shaped such that an annular flow area between leading edges of adjacent helical wellbore stabilizing elements and between trailing edges of adjacent helical wellbore stabilizing elements is variable along at least a portion of a length (L) of the two or more helical wellbore stabilizing elements, and such that an unobstructed axial flow path exists between the adjacent helical wellbore stabilizing elements along the length (L).

Abstract: A directional casing-while-drilling system includes a rotary steerable system disposed within a casing string used as a drill string during casing-while-drilling operations. The casing string of some embodiments may include an upper section and a lower section coupled by a swivel, which may enable the upper section of the casing string to be rotated without substantially rotating the lower section. The rotary steerable system may be disposed at least partially within the lower section of the casing string, and coupled to a drill bit and/or under-reamer. The rotary steerable system may enable radial diversion of the drill bit and/or under-reamer, for example by actuation of one or more components in the rotary steerable system.

Abstract: A method of manufacturing a power unit for a downhole drilling motor includes fabricating a stator that provides two or more stator lobes that define an internal profile, and fabricating a rotor that provides at least one rotor lobe that defines an external profile that both rotates and precesses within the internal profile during operation. At least one of an external geometry and an internal geometry of the rotor along all or a portion of the rotor may be varied to alter a stiffness and mass of the rotor and thereby optimize stiffness and force balancing with respect to the stator. The rotor may then be rotatably positioned within the stator and thereby optimize the functioning and reliability of the motor power unit, of the downhole drilling motor assembly, of associated downhole drilling equipment, and to enhance directional drilling tendency modelling and directional drilling trajectory control.

Abstract: A method for modifying a return fluid in a wellbore comprises disposing at least one controllable flow restrictor along a drill string in the wellbore. At least one parameter of interest is determined at at least one location along an annulus in the wellbore. Controllably actuating the at least one flow restrictor to modify a local property of a return fluid in the annulus based at least in part on the measured parameter of interest.

Abstract: A system for drilling a well comprises a drill string in a wellbore having a bit at a distal end thereof. At least one sensor measures a drilling parameter. A computer controller has a set of instructions stored therein to process the measured drilling parameter over a drilled interval to calculate, in substantially real time, an updated friction slope and an updated worn bit slope and to calculate an updated drilling parameter for at least a portion of the well-based on the updated friction slope and the updated worn bit slope.

Abstract: A directional casing-while-drilling system includes a rotary steerable system disposed within a casing string used as a drill string during casing-while-drilling operations. The casing string of some embodiments may include an upper section and a lower section coupled by a swivel, which may enable the upper section of the casing string to be rotated without substantially rotating the lower section. The rotary steerable system may be disposed at least partially within the lower section of the casing string, and coupled to a drill bit and/or under-reamer. The rotary steerable system may enable radial diversion of the drill bit and/or under-reamer, for example by actuation of one or more components in the rotary steerable system.

Abstract: A method for modifying a return fluid in a wellbore comprises disposing at least one controllable flow restrictor along a drill string in the wellbore. At least one parameter of interest is determined at at least one location along an annulus in the wellbore. Controllably actuating the at least one flow restrictor to modify a local property of a return fluid in the annulus based at least in part on the measured parameter of interest.

Abstract: A system for drilling a well comprises a drill string in a wellbore having a bit at a distal end thereof. At least one sensor measures a drilling parameter. A computer controller has a set of instructions stored therein to process the measured drilling parameter over a drilled interval to calculate, in substantially real time, an updated friction slope and an updated worn bit slope and to calculate an updated drilling parameter for at least a portion of the well-based on the updated friction slope and the updated worn bit slope.