An embodiment includes a downhole tool with first and second modular connectors. The connection modules are configured to aid make-up and assembly and improve stability during use.

Disclosed is a high strength, high-temperature corrosion resistant martensitic stainless steel characterized by comprising the following chemical elements in percentages by mass: 0<C≤0.05%, 0.1-0.2% of Si, 0.20-1.0% of Mn, 11.0-14.0% of Cr, 4.0-6.0% of Ni, 1.5-2.5% of Mo, 0.001%-0.10% of N, 0.03-0.2% of V, 0.01-0.1% of Nb, 0.01-0.04% of Al, and the balance being Fe and inevitable impurities. In addition, also disclosed are tubing and casing manufactured from the above-mentioned high strength, high-temperature corrosion resistant martensitic stainless steel, and a method for manufacturing the tubing and the casing. The high strength, high-temperature corrosion resistant martensitic stainless steel of the present disclosure has an excellent high temperature corrosion resistance to carbon dioxide and chloride ions, as well as excellent low-temperature impact toughness and a high-temperature strength degradation resistance.

A downhole tubing rotator that has a housing configured into a production tubing string in a well in a reservoir, the housing being generally cylindrical with a hollow center and containing a two pole, three phase induction squirrel cage motor operatively connected to a tubing rotator configured to clamp onto a production tubing joint and rotate one or more production tubing joints (but not an entire production tubing string) when the motor is activated. An armor-protected insulated power and control cable connects the motor to a control box positioned at a surface of a reservoir and various sensors provide feedback for the unit. Methods of using this tool are also provided.

An apparatus, system, and method for bleeding off a hydraulic fracturing manifold used in oil and gas extraction operations.

This invention builds up on technical features and on the industry experience with the use of Merlin™ family connectors. In addition to friction, structural means utilized to transfer high torsional loads include dog-clutch teeth and may also include: interlocked thread systems, shear pins, keys and splines, all used in isolation or in arbitrary combinations. Static and fatigue bending load capacities of the connectors remain high, while the axial load capacities may or may not be high, depending on the design requirements. Connectors according to this invention can be built as new, carefully optimized designs. In some cases upgrading existing Merlin™ family connector designs to increase they torque transfer capacities may be also feasible.

The apparatus may include a tool conveyed by a conveyance device. The tool has a body with a load bearing section, an outer surface defined by a diameter, a rotational axis, and a channel in the body extending from an opening at the outer surface. At least a part of the channel is inclined relative to the rotational axis of the body at the axial location of the opening in the body. The apparatus also includes at least one functional element disposed in the channel; and a conduit operatively connected to the at least one functional element transferring at least one of: (i) energy, (ii) a signal, (iii) a fluid, (iv) and formation material. Alternatively, the apparatus includes at least one self-contained functional element disposed in the channel.

The apparatus may include a tool conveyed by a conveyance device. The tool has a body with a load bearing section, an outer surface defined by a diameter, a rotational axis, and a channel in the body extending from an opening at the outer surface. At least a part of the channel is inclined relative to the rotational axis of the body at the axial location of the opening in the body. The apparatus also includes at least one functional element disposed in the channel; and a conduit operatively connected to the at least one functional element transferring at least one of: (i) energy, (ii) a signal, (iii) a fluid, (iv) and formation material. Alternatively, the apparatus includes at least one self-contained functional element disposed in the channel.

A downhole energy transmission system is described. The system can include a tubing string having a number of tubing pipe disposed within an annulus formed by a casing string disposed within a wellbore, where the tubing string has at least one wall forming a cavity. The system can also include a remote electrical device disposed within the cavity of the tubing string at a first location. The system can further include a first stripline cable disposed on an outer surface of the tubing string, where the first stripline cable transmits a first electromagnetic directional traveling wave received from an energy source. The system can also include a second stripline cable disposed adjacent to the first stripline cable at the first location, where the second stripline cable is electrically coupled to the remote electrical device.

A piping is provided with an RFID tag for identifying the piping, wherein the piping comprises a first end section for being coupled to a second piping and a second end section for being coupled to a third piping. The piping further comprises a mid-section in between the end sections. The RFID tag is provided in an elongate recess that is formed in the piping and that extends in a tangential direction parallel to a surface of the mid-section of the piping.

A method is provided for manufacturing a segment of a drill string, such as a tubular tool, from a plurality of layers. The method includes arranging a plurality of layers based on a selected length of the segment. Each of the plurality of layers includes an aperture that is received over an alignment feature that restricts movement of the plurality of layers to two or fewer degrees of freedom. A joining process is performed to join the plurality of layers, which may include at least one replacement layer.