Abstract: To thoroughly clean, both the inside and outside of pipe and tubing, and both the threaded end and the coupling end of pipe and tubing, for a distance of 18 to 24 inches from end of pipe, a cleaner assembly includes at least one rotating brush that revolves around the outside of the pipe and at least one brush that rotates inside of the pipe. Preferaby one internal brush is provided for the threaded end and two brushes are provided for the coupling end. The second internal brush is larger and cleans the coupling threads as the pipe is moved into and from the cleaner. Cleaning fluid is introduced to the brushing areas, and is reclaimed during the cleaning operation. The cleaner is attached to a raising and lowering device that also accepts a removable spray cover and a pipe seal. The raising and lowering unit is mounted on a stand that contains the fluid collection, fluid cleaning and fluid storage system.

Abstract: Removal of a screw-on type of thread protector from a pipe is achieved by this invention with uniformly applied pressure about the entire circumferential surface of the thread protector. Thus an inflatable type grasping urethane boot of a wrench mechanism is positioned circumferentially about and adjacent to the grasping surface of a generally cylindrical screwed-on thread protector before inflation. The boot is connected with a chamber which retains a fluid such as air under pressure and thus is firmly coupled in grasping connection with the thread protector by inflating in place from an air pressure hose for example. After removal of the thread protector, the chamber may be deflated to release it. The wrench is manipulated to rotate the inflated boot by rotation of a shaft co-axially located with the pipe to which the inflation valve may be attached for ready access. Preferably, the boot is supplied with a tread design to give better grasping characteristics.

Abstract: A carefully dimensional drift is passed through a pipe section by fluid pressure to assure that the pipe is round and straight and of the right dimensions. The drift is light weight with an elastic contact surface, preferably of 70-D durometer hardness urethane, and thus is easily handled, adaptable to the fluid transit through the pipe and offers very long wear.

Abstract: A mixer-pump has a rotor shaft with a set of pins intermeshing in pins extending inwardly from a cylindrical stator to mix together materials flowing axially through the cylinder. The pins are generally cylindrical in shape except for a set of pins on the rotor shaft designated pumping pins which ae half cylindrical with their flat faces oriented to impart a longitudinal direction of travel of materials through the cylinder. Flow throughput is still further enhanced by a set of axially positioned vanes extending from the housing inwardly toward the rotor shaft with curved ends forming a scoop to receive materials being given a rotary flow component about the shaft by its rotation and convert the flow direction to an axial flow path.

Abstract: A generally cylindrical mixing tank for oil well drilling mud circulates the mud passing out of a set of urethane nozzles about an elliptical path in the tank, which is coated internally with urethane thereby to provide a long lasting mixer in the presence of the abrasive drilling mud.New ingredients are entered into the tank directly from bags as they are passed over a cutter knife and across an entry grillwork platform. Water may be added for proper viscosity.The nozzles, by aid of a circulating pump taking mud from the tank, cause the mud to flow in a generally rotary path inside the tank and a set of knives is placed in this path to slice up any lumps or chunks of mud that may form.

Abstract: A well drilling bit or equivalent tool is provided with a protective carrying case in the form of an open bottom conically shaped plastic hollow bucket with embedded flexible cords or cables extending out of the upper wide mouth to receive plastic sleeve handles for manually carrying the awkward weight of the drilling bit in a protective case thereby preventing damage to the tool. The drill bit is held in place by two opposed endless flexible cord or cable arrays which are fastened together over the drill bit to hold it in mating registration with cutting edges against the conical interior plastic surface of the carrying case. The bit edges thus engage the soft plastic walls for a protective fit, and the awkward weight of the drill bit can be easily manually carried without fear of damage by dropping. Also the plastic protective cover shields the drill bit from damage from any object striking the bit.