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: Described is a tiedown winder. It has a base member having a magnetised region to allow the base member to be selectively secured one of a plurality of ferrous parts of a vehicle to become releaseable secured thereto. It also has an axle able, in a use position, to engage with said base member in a manner to allow rotation of the axle relative the base member and presenting a winding zone about which a tie down can be wound.

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: A system for identifying faults in a radio frequency device under test, the system including a passive intermodulation test module, configured to perform passive intermodulation testing of the device under test on at least one test port; and an in-line S-parameter test set, coupled to the passive intermodulation test module and intermediate the passive intermodulation test module and at least one test port, and configured to perform wideband S-parameter testing of the device under test on the at least one test port.

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 system for identifying faults in a radio frequency device under test, the system including a passive intermodulation test module, configured to perform passive intermodulation testing of the device under test on at least one test port; and an in-line S-parameter test set, coupled to the passive intermodulation test module and intermediate the passive intermodulation test module and at least one test port, and configured to perform wideband S-parameter testing of the device under test on the at least one test port.

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.

Abstract: A recess shoe system includes a recess shoe an insert sleeve disposed radially inwardly adjacent of the recess shoe in a portion of the recess shoe. The insert sleeve includes a ring and a plurality of fingers extending from the ring, the fingers being radially outwardly deflectable in response to a radially outwardly directed force. The force is generated by a swage in a swaging position acting on an inside dimension of the insert sleeve, and the insert sleeve is radially inwardly retractable when the radially outwardly directed force is removed such that the fingers of the insert sleeve define a tubular structure having an outside dimension smaller than an outside dimension of the swage in the swaging position and method.

Abstract: A recess shoe system includes a recess shoe; an insert sleeve disposed radially inwardly adjacent of the recess shoe in a portion of the recess shoe the insert sleeve having a ring and a plurality of fingers extending from the ring, the fingers being radially outwardly deflectable in response to a radially outwardly directed force generated by a swage in a swaging position acting on an inside dimension of the insert sleeve and radially inwardly retractable when the radially outwardly directed force is removed such that the fingers define a tubular structure having an outside dimension smaller than an outside dimension of the swage in the swaging position and method.

Abstract: An apparatus and a method for expanding a downhole tubular. The apparatus includes a mandrel defining at least one curved support surface. The apparatus further includes an expansion member defining a curved bearing surface for contact with the support surface and corresponding to the mandrel support surface. The expansion member is movable relative to the mandrel, whereby the surfaces are in contact and movable over one another to move the expansion member from a smaller diameter first configuration towards a larger diameter second configuration.

Abstract: A subject (12) observes an image on a display (10). A control (18) produces a fixation image at a selected position in the display, followed by a stimulus spaced from the fixation image. An eye position sensor (14) detects a saccade movement towards the stimulus. The stimulus is then replaced with a fixation image and the cycle repeated. The time taken to saccade plus the intensity of the stimulus are used to produce a retinal map of field of vision, or to assess other characteristics of the subject.

Abstract: There are disclosed tools and apparatus for use in expanding downhole tubing.