摘要:
A tool for use in an oil or gas well to retrieve a drilling or production string from the well, said tool comprising an assembly which can be mounted on a supporting string, a driven member carried by the assembly and responsive to vertical movement of the assembly, to be driven in a predetermined rotational direction, said driven member being provided with or supporting a self-tapping thread provided at the lowermost end of the assembly, the self-tapping thread having the same sense as said predetermined direction of rotation.
摘要:
A downhole drilling tool may include a strain gauge inside a rolling-bearing element. For example, the downhole drilling tool may include a rolling-bearing element having an inner race, an outer race, and one or more bearings disposed between the inner and outer races; and a strain gauge disposed on an interior surface of the rolling-element bearing, the strain gauge including at least one circuit formed by (1) a first substrate and a second substrate defining a gap therebetween and having first conductive fibers and second conductive fibers, respectively, extending therefrom into the gap in an intermingling configuration, (2) an electrical connection between the first and second substrates, and (3) an electrical resistance sensor arranged within the electrical connection.
摘要:
An apparatus for detecting over-torquing or un-torquing of a threaded connection between components in a borehole penetrating the earth includes: a string of components coupled in series by a threaded connection; a transmission line attached to each component; a signal coupler in communication with the transmission line and disposed on each component at each threaded connection, the signal coupler being configured to transmit the signal to an adjacent signal coupler on an adjacent coupled component in order to transmit a signal along the transmission line attached to the adjacent coupled component; a receiver configured to receive the signal; and a processor in communication with the receiver and configured to: (i) determine a difference between a characteristic of the signal and the characteristic of a reference signal and (ii) transmit an alert signal signifying that the threaded connection is over-torquing or un-torquing in response to the difference exceeding a threshold value.
摘要:
Downhole rotary steerable drill including a drilling shaft rotatably supported within a housing, the drilling shaft and housing each having a longitudinal axis. The drill can include a releasable locking mechanism for rotationally locking and releasing the drilling shaft relative to the housing, the releasable locking mechanism transitionable between locked and released configurations. The releasable locking mechanism includes a sliding plunger coupled to the housing by a coupling that permits longitudinal reciprocation of the sliding plunger relative to the housing and prevents rotation of the sliding plunger relative to the housing. The releasable locking mechanism can also include pressure-responsive piston that reciprocates between an unactuated configuration and actuated configuration in response to applied pressure from a pressuring pump.
摘要:
A work string assembly for an oil or gas well has a first and second tubulars, and a torque limiting device connected in the work string. The torque limiting device has a body with an axial bore and two interconnected members that can disconnect to be relatively rotatable. The interconnected members can be repeatedly re-engageable when the torque levels drop below a torque threshold value, or can be connected by a frangible member that is broken when the interconnected members disconnect. A selectively actuable circulation port provided in the string adjacent to and above the torque limiting device allows the annulus between the work string and the casing to be flushed with fluid from the port.
摘要:
A tool (10) for installing and removing a valve removal plug (60) from wellhead components, the tool comprising a curved pressure containing housing (11) having a first and a second end (12, 13), the housing having a bore (20) extending from the first end to the second end, a flexible drive member (21) within the bore and drive means (40, 41) connected to the drive member for causing rotational movement of the drive member within the pressure containing housing.
摘要:
Apparatuses and methods for controlling the connection speed of downhole connectors in a subterranean well are disclosed. An apparatus includes a first assembly having a first downhole connector and a first communication medium that is positionable in the well. A second assembly includes a second downhole connector and a second communication medium and has an outer portion and an inner portion that are selectively axially shiftable relative to one another. A lock assembly including at least one lug initially couples the outer and inner portions of the second assembly together such that, upon engagement of the first assembly with the second assembly downhole, the lug is radially shifted releasing the lock assembly to allow axial shifting of the outer portion of the second assembly relative to the inner portion of the second assembly, thereby operatively connecting the first and second downhole connectors to enable communication between the communication media.