Cleanout tools and related methods of operation. At least some of the example embodiments are cleanout tools including a tool body that defines an internal annular channel, a joiner coupled to the tool body, a sleeve telescoped within the joiner and tool body, and a ball disposed within the annular channel. The ball held within the annular channel by the sleeve, and the ball configured to move along the annular channel under force of fluid pumped into the cleanout tool. The ball creates a pulsing of fluid streams exiting the tool body. Moreover, in some example systems the fluid streams created by the tool body intersect the inside diameter of a casing at non-perpendicular angles.

A method for improving a corrosion protection of a hollow shaft may include introducing a lance into the hollow shaft, and cleaning and expelling a liquid from an inside of the hollow shaft via spraying a gas from the lance. The method may also include applying a corrosion protection medium onto an inner lateral surface of the hollow shaft at least in certain regions, and closing off the hollow shaft.

A rotor nozzle includes a carrier element having an axial bore for supplying a pressurized liquid, a nozzle head rotatably mounted thereon and rotatably drivable by a hydraulically generated torque. The nozzle head has at least one laterally emerging removal nozzle in fluid-open communication with the axial bore. The removal nozzle is radially aligned. The nozzle head has at least one laterally emerging, separate drive nozzle extending at a distance from the radial and, depending on the rotational position of the nozzle head, is in communication with the axial bore via a through-bore of the carrier element.

The present invention is directed to a method of cleaning an oil and gas well riser section that has a central larger diameter tubular member having a flow bore and a plurality of smaller diameter tubular members connected to the central larger diameter tubular member, each smaller diameter tubular member having a flow bore. The method includes placing a fitting on an end portion of the riser section, the fitting covering an end of the larger diameter tubular member and the ends of the smaller diameter tubular members, wherein the fitting preferably has multiple openings including one or more centrally located openings and a plurality of circumferentially spaced apart outer openings that are spaced radially away from each of the one or more centrally located openings, said fitting having a drain opening. A cleaning tool is preferably inserted through the centrally located opening and into the larger diameter tubular member, wherein said pressure washing tool cleans the inside surface of the larger diameter tubular member. The cleaning tool is then preferably inserted through one of the outer openings and into one of the smaller diameter tubular members, wherein said second pressure washing tool cleans the inside surface of the smaller diameter tubular member. Fluid from the cleaning operations is preferably removed (suctioned) via the fitting discharge. The outer openings are preferably positioned along a curved line that is radially spaced outwardly of the centrally located openings. Preferably all tubular members are cleaned simultaneously or substantially simultaneously.

A working device is capable of moving inside a pipe, whereby it is possible to exert the extremely large driving force in the pipe, and provided the device for performing the work sufficiently such as the cleaning, the vacuum recovering, and the forcibly drying the wet internal surface of the pipe. The device which moves along the pipe and operates on the internal surface of the pipe, comprising: material feeding pipe, pressure boundary partition, pressure boundary seal, nozzle unit, material feeding hose, traveling device, feeding device of the surface processing material, vacuum generating means, negative pressure space, and environment pressure space. Wherein, negative pressure space and environment pressure space are defined in the pipe by pressure boundary partition and pressure boundary seal, and vacuum breaking valve mechanism maintains fixedly the differential-pressure between the negative pressure space and the environment pressure space, and which makes the environment fluid to flow into the negative pressure space from the environment pressure space.

A system includes a processor. The processor estimates a pattern of a flow of a mixture of drilling fluid and cuttings in an annulus of a wellbore. The flow is estimated as a stationary bed flow, a dispersed flow, or a transitional flow relative to the stationary bed and dispersed flows. The processor estimates parameters based on the estimated pattern of the flow, and determines a plurality of dimensionless parameters including a first dimensionless parameter corresponding to an effect of turbulence on the flow and a second dimensionless parameter corresponding to an effect of gravity on the flow, based on the estimated parameters. The processor characterizes the pattern of the flow as the stationary bed flow, the dispersed flow, or the transitional flow, based on the dimensionless parameters, and models the flow based on the estimated pattern if it is determined that the characterized pattern matches the estimated pattern.

A rotary nozzle assembly has a hollow nozzle body fastened to a high pressure hose, a tubular shaft rotatably carried in the hollow nozzle body, and a head member fastened to the tubular shaft. The head member has a rounded nozzle head portion and a threaded tubular portion and a central blind bore concentric with the central axis of the tubular shaft. The rounded nozzle head portion has a first lateral port passing from the central blind bore through a side of the rounded nozzle head portion at an offset from the central blind bore. This causes an unbalanced motion of the nozzle assembly on the high pressure hose while the tubular shaft rotates with the head member within the hollow nozzle body. This causes the rotary nozzle assembly, when inserted within a pipe, to follow an orbital path around the inside of the pipe.

An apparatus for sensing an obstruction within a tube being cleaned and repetitively advancing and retracting a flexible high pressure fluid cleaning lance within the tube is disclosed. The apparatus monitors drive roller/belt position and actual hose position, compares the belt (expected travel) to hose position (travel) and generates a position difference, or mismatch. If the mismatch is above a predetermined level, the drive motor direction is reversed for a predetermined time interval, and forward operation restored after the predetermined time interval; and the sequence of repeating the reversing and restoring operations is continued until the position difference or mismatch no longer exceeds the predetermined difference threshold.

A cavity cleaning and coating system for safely and efficiently cleaning and coating the interior of a cavity without requiring entry of any workers. The cavity cleaning and coating system generally includes a mount which is coupled with a movable arm of a vehicle. The mount includes an inner plate, which is coupled to the arm, and an outer plate. A shaft is coupled to the outer plate. The mount is adjustable independently of the arm of the vehicle, including outwardly, inwardly, and rotatably. A spray head is connected to the shaft. The spray head is rotatable and includes a dispenser for dispensing fluids. The vehicle is positioned near a cavity to be treated. The mount is adjusted for optimal positioning of the spray head. The spray head is lowered into the cavity to dispense a cleaning fluid and, after the cleaning fluid has dried, a coating fluid.

A shotgun hydroblasting system includes a chassis. A motor is operable to drive movement of the chassis. A support arm assembly is mounted to the chassis. A shotgun nozzle mounted to the support arm assembly such that the shotgun nozzle is movable relative to the chassis on the support arm assembly. The shotgun nozzle includes a barrel defining a primary outlet for pressurized fluid and a suppressor defining a secondary outlet for the pressurized fluid. The barrel and the suppressor are positioned and oriented such that a force of the pressurized fluid exiting the secondary outlet opposes a force of the pressurized fluid exiting the primary outlet.