Abstract: A fluid conditioning and/or treatment system is disclosed. A bell housing with a pressure relief element, for example a rupture disk, has an external shoulder to seat within a tubular. One or more filter chambers, with slots in the walls thereof, are releasably connected to the bell housing. A magnet mandrel is attached to the lowermost filter chamber. Fluids, for example drilling/completion fluids, are pumped downhole through the apparatus, and the filter chamber(s) and magnet remove solids and ferrous materials from the fluid stream. Threaded connections and connectors create a modular system, with the various elements easily changed out.

Abstract: Disclosed is a torque limiter having driver mandrel and driven axially aligned mandrels, a piston movable into and out of an engaged position wherein the driver and driven mandrels are coupled together to transmit torque there between. Hydraulically locking the movable piston in an engaged position. Disengaging the hydraulic lock when during rotation when a specified torque magnitude is exceeded to allow relative rotation between the mandrels. Resetting the torque limiter by hydraulically locking the piston in the engaging position when relative rotation ceases or is reduced.

Abstract: Disclosed is a torque limiter having driver mandrel and driven axially aligned mandrels, a piston movable into and out of an engaged position wherein the driver and driven mandrels are coupled together to transmit torque there between. Hydraulically locking the movable piston in an engaged position. Disengaging the hydraulic lock when during rotation when a specified torque magnitude is exceeded to allow relative rotation between the mandrels. Resetting the torque limiter by hydraulically locking the piston in the engaging position when relative rotation ceases or is reduced.

Abstract: Disclosed is a torque limiter having driver mandrel and driven axially aligned mandrels, a piston movable into and out of an engaged position wherein the driver and driven mandrels are coupled together to transmit torque there between. Hydraulically locking the movable piston in an engaged position. Disengaging the hydraulic lock when during rotation when a specified torque magnitude is exceeded to allow relative rotation between the mandrels. Resetting the torque limiter by hydraulically locking the piston in the engaging position when relative rotation ceases or is reduced.

Abstract: Disclosed is a downhole knock-out tool (900) for use in a tubing string (702) with a power head (704) for creating reverse flow. The tool has a cylindrical housing (910) with an inner tube (920) in the housing directing well fluids against a knock-out (940) or deflector cone to accumulate debris in the annulus (926) formed between the housing and tube.

Abstract: A power head for connection in a tubing string suspended in a subterranean location in a wellbore is useful for removing debris from the wellbore. When the power head is in the closed position, well fluids pumped down the tubing string will flow through the power head. When the power head is moved to the open position by dropping a actuator ball onto a seat in the power head, the power head creates flow down along the annulus to circulate debris laden well fluids into a catch apparatus such as a catch basket or screen. In the open position, nozzles and the eductor create the reverse flow.

Abstract: Disclosed is a downhole well filter (800) and method of use in a tubing string with a power head (704) for creating reverse flow. The filter assembly includes an inner pipe (820) into which fluid flow is directed. The inner pipe is positioned within a cylindrical screen member (830). The well fluid flows through the screen member and debris from the fluid is deposited in the annulus (832) between the inner pipe and screen member. The screen member has a cap (860) at its upper end to prevent fluid from escaping from the upper end of the screen member. The cap may have a pop off valve (870) so fluid can escape from the screen member when the screen becomes clogged with debris or pressure builds within the screen member.

Abstract: A well tool (100) for use in cleaning a well of fluids and debris characterized by one or more wiper elements (30) for swabbing the wellbore and internal passageways (11, 15) and valves (70, 72) in the tool, permitting forward and reverse fluid circulation through the tool to bypass the wiper elements.

Abstract: Disclosed is a torque limiter having driver mandrel and driven axially aligned mandrels, a piston movable into and out of an engaged position wherein the driver and driven mandrels are coupled together to transmit torque there between. Hydraulically locking the movable piston in an engaged position. Disengaging the hydraulic lock when during rotation when a specified torque magnitude is exceeded to allow relative rotation between the mandrels. Resetting the torque limiter by hydraulically locking the piston in the engaging position when relative rotation ceases or is reduced.

Abstract: Disclosed is a torque limiter having driver mandrel and driven axially aligned mandrels, a piston movable into and out of an engaged position wherein the driver and driven mandrels are coupled together to transmit torque there between. Hydraulically locking the movable piston in an engaged position. Disengaging the hydraulic lock when during rotation when a specified torque magnitude is exceeded to allow relative rotation between the mandrels. Resetting the torque limiter by hydraulically locking the piston in the engaging position when relative rotation ceases or is reduced.

Abstract: Disclosed is a bypass tool for a tubing string a wellbore. The bypass tool has a tubular body with ports in the body wall to inject fluid into an annulus. An axially shiftable sleeve is mounted to control flow through the ports. Spring-loaded detents in the body engage openings in the sleeve. In operation, the bypass tool is run into the wellbore in the closed position with the sleeve closing the ports. When bypass flow is desired, an actuation ball is pumped down the wellbore and engages the detents, unlocking the sleeve to shift to where ports in the sleeve align with ports in the mandrel. To return the bypass tool to the closed position, a second ball of the same diameter as the first ball is pumped down the well to engage and depress the detents to allow the sleeve to shift to a closed position.

Abstract: A bypass valve for use in tubing string which can be repeatedly opened and closed to selectively provide bypass fluid flow between the interior of the tubing string and the annulus to assist in flowing debris. The valve uses hardened valve elements which can be opened and closed while flowing fluids under pressure through the tubing string. The valve is actuated by placing the tubing string in a sufficient weight down condition to operate the valve. A trigger is provided to prevent unintended actuation of the bypass valve during use.

Abstract: Disclosed is a downhole knock-out tool (900) for use in a tubing string (702) with a power head (704) for creating reverse flow. The tool has a cylindrical housing (910) with an inner tube (920) in the housing directing well fluids against a knock-out (940) or deflector cone to accumulate debris in the annulus (926) formed between the housing and tube.

Abstract: Disclosed is a power head for connection in a tubing string suspended in a subterranean location in a wellbore for use in methods removing debris from the wellbore. When the power head is in the closed position, well fluids pumped down the tubing string will flow through the power head. When the power head is moved to the open position by dropping a actuator ball onto a seat in the power head, the power head creates flow down along the annulus to circulate debris laden well fluids into a catch apparatus such as a catch basket or screen. In the open position, nozzles and the eductor create the reverse flow.

Abstract: Disclosed is a downhole well filter (800) and method of use in a tubing string with a power head (704) for creating reverse flow. The filter assembly includes an inner pipe (820) into which fluid flow is directed. The inner pipe is positioned within a cylindrical screen member (830). The well fluid flows through the screen member and debris from the fluid is deposited in the annulus (832) between the inner pipe and screen member. The screen member has a cap (860) at its upper end to prevent fluid from escaping from the upper end of the screen member. The cap may have a pop off valve (870) so fluid can escape from the screen member when the screen becomes clogged with debris or pressure builds within the screen member.

Abstract: A well tool (100) for use in cleaning a well of fluids and debris characterized by one or more wiper elements (30) for swabbing the wellbore and internal passageways (11, 15) and valves (70, 72) in the tool, permitting forward and reverse fluid circulation through the tool to bypass the wiper elements.

Abstract: Disclosed is a torque limiter having driver mandrel and driven axially aligned mandrels, a piston movable into and out of an engaged position wherein the driver and driven mandrels are coupled together to transmit torque there between. Hydraulically locking the movable piston in an engaged position. Disengaging the hydraulic lock when during rotation when a specified torque magnitude is exceeded to allow relative rotation between the mandrels. Resetting the torque limiter by hydraulically locking the piston in the engaging position when relative rotation ceases or is reduced.

Abstract: Disclosed is a bypass tool for connection in a tubing string suspended in a subterranean location in a wellbore. The bypass tool has a tubular body for connection to a tubing string with ports in the body wall to inject fluid into the annulus, surrounding the tubing string. In some applications, nozzles are placed in the ports to create fluid jets which can be utilized, for example, for cleaning a subsea BOP. In other applications, fluids are injected into the annulus to assist circulation. An axially shiftable sleeve is mounted in the body's internal bore and acts as a valve to open and block flow through the ports. Spring-loaded detents in the body engage openings in the sleeve to lock the sleeve against axial movement. The detents extend into the sleeve to be engaged by an actuator ball pumped down the tubing string to the bypass tool. In operation, the bypass tool is run into the wellbore in the closed position with the sleeve closing the ports in the mandrel.

Abstract: A bypass valve for use in tubing string which can be repeatedly opened and closed to selectively provide bypass fluid flow between the interior of the tubing string and the annulus to assist in flowing debris. The valve uses hardened valve elements which can be opened and closed while flowing fluids under pressure through the tubing string. The valve is actuated by placing the tubing string in a sufficient weight down condition to operate the valve. A trigger is provided to prevent unintended actuation of the bypass valve during use.