Abstract: A wellbore depth instrument (WDI) for measuring wellbore depths along a wellbore, acting as an odometer. In one embodiment, the WDI may be mounted onto a downhole tool-string deployed by a pipe, coil, e-line, or slickline. Further, the WDI may comprise two independently suspended wheels of fixed diameter with respective internal electronic packages that each may record in memory rotations of their respective wheels and frequencies of those rotations along the wellbore. Such recordings may allow for accurate determination and characterization of tool-string dynamics (e.g., tool-string speed, direction, stick slip, creep and hold-ups) as well as absolute and relative tool-string position along a wellbore (i.e., wellbore depth).

Abstract: A casing pipe extends in a vertical direction and is configured to be lowered into a borehole, and a mounting hole penetrates a side wall of the casing pipe; a push body is mounted in the mounting hole, a push groove is provided in one side, facing an interior of the casing pipe, of the push body, a flexible body is attached to an inner side wall of the casing pipe, one end of the flexible body is connected to the push body, the other end thereof is located in the casing pipe, and a sensor is mounted on the flexible body; and a propelling portion is connected to a driving mechanism and configured to be lowered to a position, opposite the push groove, in the borehole, and the driving mechanism drives the propelling portion to move towards the push groove.

Abstract: A method is disclosed that includes measuring an inner diameter (ID) of a tubular at least at a plurality of points along an inner circumference of the tubular, at a predetermined axial distance from an end of the tubular, to yield a first set of measurements. A computer processor is used to: create a tubular profile from the first set of measurements, wherein the tubular profile represents a unique identification code of the tubular; save the profile; and thereafter identify the tubular. The tubular is identified via: receiving a second set of measurements of the ID of the tubular from at least at a plurality of points along an inner circumference of the tubular, at the predetermined axial distance from the end of the tubular; and comparing the second set of measurements with the saved tubular profile to identify the tubular.

Abstract: Systems and methods are provided for aligning a fastener feed mechanism. One embodiment is an apparatus that includes an alignment tool that aligns a fastener feed mechanism with a chamber of a fastening device that receives fasteners. The alignment tool includes a tip section having a diameter less than a diameter of the chamber, a chamber fit section that extends from an end of the tip section in a lengthwise direction and has a diameter corresponding with the diameter of the chamber, a lip that protrudes radially from the chamber beyond the diameter of the chamber, and a fitting member that extends from the lip in the lengthwise direction.

Abstract: A flowmeter for use in a wellbore that has vane assemblies that deploy from a rotating segment. The vane assemblies project a variable distance away from the rotating segment, so that the flowmeter adjust to varying flow conditions. The variable distance of the vane assemblies also allows use of the flowmeter in different sized wellbores. An example flowmeter includes vane assemblies of varying length that are selectively deployed depending on operating conditions. Other vane assemblies have vane elements with a pitch that varies in response to wellbore and fluid flow operating parameters.

Abstract: A wellbore caliper includes an actuator housing pivotally connected at one end to a well logging instrument housing and an actuator disposed in the housing and operable to extend and retract laterally extensible measuring arms.

Abstract: For some embodiments, a system includes a moveable structure, moveable in at least a linear direction relative to a supporting structure, a magnetic field sensor assembly including a magnetic field sensor, and a magnet, wherein one of the magnet and the magnetic field sensor is coupled to the moveable structure, and wherein the other of the magnet and the magnetic field sensor assembly is coupled to the supporting structure, and wherein the magnetic field sensor assembly is configured to determine the relative position of the magnet to the magnetic field sensor.

Abstract: A measuring device includes a housing and a caliper positioned inside the housing. The housing has a proximal end and a distal end and defines an axis from the proximal end to the distal end. The caliper includes a first measurement probe extending out of the housing in a first direction, a second measurement probe extending out of the housing in a second direction that is substantially opposite of the first direction, and measurement circuitry configured for transmitting a measurement signal based on the relative positions of the first and second measurement probes.

Abstract: A wellbore caliper includes an actuator housing pivotally connected at one end to a well logging instrument housing and an actuator disposed in the housing and operable to extend and retract laterally extensible measuring arms.

Abstract: A wellbore caliper includes an actuator housing pivotally connected at one end to a well logging instrument housing and an actuator disposed in the housing and operable to extend and retract laterally extensible measuring arms.

Abstract: A wellbore caliper includes an actuator housing pivotally connected at one end to a well logging instrument housing and an actuator disposed in the housing and operable to extend and retract laterally extensible measuring arms.

Abstract: Example methods and apparatus to determine and use wellbore diameters are disclosed. A disclosed example method comprises positioning a downhole tool in a wellbore, counting a number of rotations of a motor used to cause the downhole tool to contact a surface of the wellbore, and determining a diameter of the wellbore based on the number of rotations of the motor.

Abstract: A borehole tool, comprises: a tool body; a series of arms connected to the tool body and moveable radially relative thereto; and a series of pads mounted on the arms so as to be pivotable about a radial axis relative to the tool body. By allowing pivoting of the pads about a radial axis, elongate pads can be arranged to provide different circumferential coverage according to the orientation with respect to the longitudinal axis of the borehole.

Abstract: An internal shim used to accurately measure spaces in conjunction with a standard small probe has a shim top and a chassis. The internal shim is adjustably fixed within the space to be measured using grippers that emerge from the chassis and which are controlled by an arm pivotably attached to the shim top. A standard small probe passes through the shim along guides on the chassis and measures the distance between the exterior of the chassis and the boundary. By summing the measurements on each side of the chassis and the width of the chassis, the dimension of the space can be determined to within 0.001 inches.

Abstract: An apparatus for measuring the internal diameter of a wellbore for a wireline formation sample taking instrument, including an hydraulically actuated probe and back up shoe for selective engagement with the wall of a wellbore, an hydraulic pump and selectively controllable valves for selectively controlling extension and retraction of the probe and back up shoe, and an hydraulic fluid reservoir to supply hydraulic fluid to the pump for extending and retracting the probe and back up shoe. The reservoir includes a pressure compensator for balancing the pressure in the reservoir to an hydrostatic pressure in the wellbore. A position sensor is coupled to the compensator to determine its position. The position of the compensator corresponding to the fluid volume in the reservoir, the extension distance of the probe and back up shoe, and the internal diameter of the wellbore at the location of the probe and back up shoe.