Abstract: A method may include establishing a network connection between a sensor device and a drilling management network. The method may further include obtaining, from a control system in the drilling management network, a request for sensor data from a sensor device coupled to the drilling management network. The method may further include transmitting, using a communication protocol and over the drilling management network, the sensor data from the sensor device to the control system.

Abstract: A method of detecting seismic waves traveling through a subsurface formation includes lowering a cable into a borehole in the subsurface formation, the cable having at least one optical fiber associated therewith, and causing descent of a remote end of the cable to be arrested. The method further includes feeding a further length of the cable into the borehole such that the cable is slack and in contact with at least part of a wall of the borehole, and using an interrogator coupled to the at least one optical fiber to detect seismic waves traveling through the subsurface formation and into the cable.

Abstract: A mechanism to enhance disengagement of release assembly portions from one another when disposed in a well. The mechanism may be disposed at an internal rod of the release assembly and configured to prevent frictional resistance to shifting of the rod.

Abstract: A power supply and control unit for submersed electric motors includes an enclosure which is jointly connected to the motor of a submersed electric pump and forms a hermetic chamber that contains an electronic power supply that can be connected to the motor. The unit includes a heat exchange means in the liquid state that completely fills the empty space within the hermetic chamber in order to transfer to the enclosure the heat generated by the electronic power supply.

Abstract: In a method for controlling an electronic device (1) with a programmable component and an independent microcontroller (10) and in such an electronic device (1), by the microcontroller (10), the component is monitored, a malfunction of the component is identified and the component is reprogrammed.

Abstract: Methods are described using resistivity measurements obtained while drilling one or more offset wells using a drilling mud to guide drilling of one or more uncased intervals of a well to identify a casing point or points in the uncased intervals of the well. Resistivity data is gathered during drilling the offset well and prior to penetrating a region of interest of a known subterranean formation. The drill string in the uncased interval of the well progresses toward the region of interest, using resistivity data at similar depths to identify a casing point while the drill bit advances toward but does not penetrate the region. In certain embodiments resistivity may also be obtained in front of the drill bit in the uncased interval of the well and used in conjunction with the offset well resistivity data to identify casing points in the uncased intervals of the well.

Abstract: A method for preventing a downhole tool from getting stuck in a wellbore, includes: monitoring output of at least one friction sensor mounted on an external surface of the downhole tool; and if the output indicates a high friction condition, then reducing the friction to prevent the tool from getting stuck. A tool and a computer program product are provided.

Abstract: The invention is a method of determining a free point in stuck drill pipes, comprising the steps of: a. measuring a first magnetic permeability (?1) based on a time-induced decay of the electromagnetic field generated by application of an electric current pulse to the unextended pipe (l0); b. applying a force to the pipe to extend the pipe (l1); c. measuring a second magnetic permeability (?2) of the extended pipe (l1); and d. comparing the first and second magnetic permeabilities (?1 and ?2) along the drill string to determine the free point based on the change of magnetic permeability.

Abstract: Apparatus and methods for selectively releasing a first wellbore component to a second wellbore component using a disconnect device. The method includes coupling a disconnect device to a workstring and a downhole tool; performing a downhole operation using the downhole tool, and selectively releasing an upper portion of the disconnect device from a lower portion of the disconnect device, thereby releasing the downhole tool from the workstring. The method may also include reconnecting the upper portion of the disconnect device to the lower portion of the disconnect device. The disconnect device is capable of transferring torque to the wellbore component.

Abstract: Electromagnetic free point tools are configured to determine the free point of a downhole pipe in a wellbore utilizing the amplitude or phase change in a transmitted signal for stressed and unstressed pipe. Certain examples of electromagnetic free point tools comprise a housing, one or more transmitter coils, one or more receiver coils, each coil spaced apart from one another, a power source for applying an oscillating voltage to the one or more transmitter coils which then induces a current in the receiver coil(s), and electronics for measuring the induced current in the receiver coil(s). In another embodiment, at least one of the coils is axially adjustable in position within the tool to permit the relative distance between coils to be adjusted to optimize performance of the tool in various conditions. By measuring the amplitude or phase of the induced current relative to the oscillating voltage, a log of the amplitude or phase is generated while passing the tool through a length of unstressed pipe.

Abstract: Embodiments of the present invention generally relate to a method and/or apparatus for deploying wireline tools with a non-electric string. In one embodiment, a method of determining a free point of a tubular string stuck in a wellbore includes deploying a tool string in the stuck tubular with a non-electric string. The free point assembly includes a battery, a controller, and a free point tool. The method further includes activating the free point tool by the controller. The free point tool contacts an inner surface of the stuck tubular string. The method further includes applying a tensile force and/or torque to the stuck tubular string; and measuring a response of the tubular string with the free point tool.

Abstract: A method of determining the stuck point in a bore hole is provided. The method employs a device, such as an inductor or coil, for writing magnetic marks into the bore hole casing. The device is incorporated into a retrieval tool so that when a decision is taken to back off from the bore hole and recover any down hole equipment, the magnetic marks can be written on the casing of the bore hole as the retrieval tool is lowered into place. As the retrieval tool is raised in the bore hole, lifting the down hole equipment towards the surface, the magnetic marks are read using a three dimensional magnetic field sensor disposed either in the fishing tool or in the down hole apparatus itself.

Abstract: A free point tool has at least one sensor to measure deformation of a stuck conduit in a borehole. A set of anchors is located adjacent to and on each side of the sensor. The anchors include anchor arms that move from a stowed position to an extended position. Each of the anchor arms has a pad, which pad has a contact face. The contact face is structured and arranged to engage the conduit. The pad is coupled to the respective anchor arm in an articulating manner, such as by a pin joint or a ball and socket joint. The pad can be easily coupled to or disconnected from the arm. This allows the pad to be selected for the downhole conditions, including conduit physical characteristics and environmental conditions downhole. The anchors also include cam arms coupled between the anchor arms and an actuator. There are provided at least two sets of anchor linkages of cam arms and anchor arms so as to adapt to the conduit inside diameter.

Abstract: A self contained logging tool comprising electronic apparatus for logging a well is disclosed. This tool includes a normally open fluid flow valve structure being activated to operation by differential movement of drill pipe in which the logging tool resides. The valve structure operates to gradually close and thereby restrict the flow of fluid through the valve, which in turn restricts the flow of fluid within the drill pipe. This flow restriction results in increasing the back pressure within drill pipe to provide an indication at the surface that the logging tool is struck.

Abstract: A downhole tool that is connectable to a line to be run downhole with the tool includes a housing, a sensor and a mechanism that is located inside the housing. The mechanism is coupled to the sensor to, in response to the detection of the feature by the sensor, generate a tension signal in the line without physically contacting a downhole structure.