摘要:
An apparatus for locking a transmission line in a tubular includes a first clamp segment configured to surround at least a portion of the transmission line of the tubular, the transmission line having a longitudinal axis. The apparatus also includes a second clamp segment configured to surround at least a portion of the transmission line, the second clamp segment and the first clamp segment configured to apply radial forces in opposite radial directions when the first clamp segment is engaged with the second clamp segment, the opposite radial directions being perpendicular to the longitudinal axis, the radial forces operating together to maintain the transmission line in a fixed position relative to the tubular and maintain tension in the transmission line.
摘要:
An apparatus for communicating a signal downhole includes a downhole pipe configured to be coupled to another downhole pipe and a protection tube secured to the downhole pipe. A transmission line is disposed in the protection tube and configured to communicate the signal. A communication device is disposed in the downhole pipe and configured to communicate the signal to another downhole pipe. An end of the transmission line is configured to be axially movable with respect to the downhole pipe in order to have the end of the transmission line extending from the protection tube to establish a connection between the transmission line and the communication device.
摘要:
An apparatus for maintaining tension of a transmission line in a tubular includes a first clamp segment configured to surround at least a portion of a transmission line and a second clamp segment configured to surround at least a portion of the transmission line. The second clamp segment has a first axial end and a second axial end. The first axial end is configured to contact an axial end of the first clamp segment, such that the first clamp segment and the second clamp segment are configured to apply a force in opposite radial directions to clamp the transmission line with respect to the tubular to lock a position of the transmission line with respect to the tubular.
摘要:
An apparatus for drilling curved and straight sections of a wellbore is disclosed that in one non-limiting embodiment includes a drilling assembly configured to include a drill bit at an end thereof that can be rotated by a drive in the drilling assembly and by the rotation of the drilling assembly, and wherein the drilling assembly includes: a deflection device that (i) tilts a section of the drilling assembly within a selected plane when the drilling assembly is substantially rotationally stationary to allow drilling of a curved section of the wellbore by rotating the drill bit by the drive; and (ii) straightens the section of the drilling assembly when the drilling assembly is rotated to allow drilling of a straight section of the wellbore.
摘要:
A method of forming a wired pipe transmission line includes: providing an assembly that includes an inner conductor surrounded by an insulating material; attaching a fixation element to the assembly at or near an end thereof; providing a tubular outer conductor; disposing the assembly and the fixation element within the outer conductor; and fixedly attaching the fixation element to the inner portion of the tubular outer conductor.
摘要:
A device for generating pressure pulses in flowing fluid includes a valve having a stem movable linearly relative to a passageway. The valve is configured to vary restriction to flow through the passageway in response to changes in relative position between the stem and the passageway. The device also includes a rotatable member in operable communication with the valve such that rotation of the rotatable member causes the stem to move, and a motion translation arrangement that is in operable communication with the rotatable member and the stem such that the stem linearly reciprocates in response to the rotatable member rotating in a single direction of rotation.
摘要:
An apparatus for retaining electronic components in a downhole component coupling mechanism includes: a power supply frame including a first housing configured to retain a power supply therein and isolate the power supply from downhole fluids, the power supply frame configured to be disposed in and constrained axially by a coupling assembly of a first downhole component and a second downhole component; an electronic component disposed in a second housing in the coupling assembly, the electronic component located external to the power supply frame; and a connector configured to transmit electric power from the power supply to the electronic component to supply electrical power to the electronic component.
摘要:
An apparatus for maintaining tension of a transmission line in a tubular includes a first clamp segment configured to surround at least a portion of a transmission line and a second clamp segment configured to surround at least a portion of the transmission line. The second clamp segment has a first axial end and a second axial end. The first axial end is configured to contact an axial end of the first clamp segment, such that the first clamp segment and the second clamp segment are configured to apply a force in opposite radial directions to clamp the transmission line with respect to the tubular to lock a position of the transmission line with respect to the tubular.
摘要:
A reciprocating pulser system for generating pressure fluctuations in a flowing drilling fluid comprising a reciprocating poppet and a stationary valve assembly with axial flow passages. The poppet reciprocates in close proximity to the valve assembly, at least partially blocking the flow through the valve assembly and generating oscillating pressure pulses. The poppet passes through two zero speed positions during each cycle, enabling rapid changes in signal phase, frequency, and/or amplitude thereby facilitating enhanced data encoding. The poppet is driven by a linear electric motor disposed in a lubricant filled housing. In one embodiment, the housing to shaft seal is a flexible bellows. In one embodiment, a force balance spring is used to essentially offset the hydraulic flow forces on the poppet. In one embodiment, a bypass poppet is used to adjust the differential pressure across the valve assembly.