Abstract: A coiled tubing service unit and method for oil and gas wells including a string of components extending above ground in coaxial alignment with said well and including an injector for injecting coiled tubing into the well and a sealing unit for preventing the flow of pressurized oil and gas from the well. The sealing unit is adapted to be disconnected from the string of components and removed from the coaxial alignment to permit a relatively large-diameter tool assembly to be inserted therein. The sealing unit can then be repositioned and connected in the string of components and the coiled tubing can be reinserted into the string, connected to the tool and driven into the well.

Abstract: A large diameter reel having a large diameter hollow drum with a flange at each end about which a flexible elongate member, such as coil tubing, electrical conductor cable, or the like, may be wound, the reel having no shaft, but instead, having a large central opening extending therethrough, and having a gear located in the opening or on at least one or both of the reel's flanges. A carrier, such as a skid, trailer or semi-trailer, is provided with rollers for supporting the reel upon edge and with a driving gear meshable with the reel gear for rotating the reel. The trailer or semi-trailer may be provided with a hole in the bed thereof to accommodate the reel in an inset position to permit such vehicles with a reel thereon to freely pass beneath highway overpasses, and other overhangs. Methods of supporting such reels on such carriers are also provided.

Abstract: Apparatus for pressurized cleaning of flow conductors. The apparatus has a first mandrel and a second mandrel telescoped therein. A cleaning tool can be attached to the second mandrel. Changes in fluid pressure flowing through the mandrels will cause the second mandrel to rotate relative to the first mandrel. Rotation is used to direct fluid jets in the cleaning tool towards different portions of the interior of the flow conductor. Rotation of the cleaning tool can also be used for hydraulic drilling of deposits within the flow conductor.

Abstract: Apparatus for pressurized cleaning of flow conductors. The apparatus has a first mandrel and a second mandrel telescoped therein. A cleaning tool can be attached to the second mandrel. Changes in fluid pressure flowing through the mandrels will cause the second mandrel to rotate relative to the first mandrel. Rotation is used to direct fluid jets in the cleaning tool towards different portions of the interior of the flow conductor. Rotation of the cleaning tool can also be used for hydraulic drilling of deposits within the flow conductor.

Abstract: An apparatus for pressurized cleaning of flow conductors. The apparatus utilizes a control slot formed in a zig-zag pattern and a pin which travels in the slot. The slot and pin assist in indexingly rotating the nozzle section of the apparatus when the apparatus is reciprocated in alternate directions in the flow conductor. Pressurized cleaning fluid is supplied to the apparatus and is directed radially outward through nozzles against the flow conductor in such a manner as to progressively clean the flow conductor as the nozzle section rotatively indexes. Another set of nozzles may be included, if desired, in the lower end of the apparatus to allow cleaning along the longitudinal axis.