A device for cleaning cylindrical objects such as bolts has a sleeve (1) which contains a rotor (2) equipped with a brush (7). A bolt is inserted into the sleeve (1), and the rotor (2) is rotated by a motor (4) to clean the periphery of the bolt. The sleeve (1) is connected to a suction means of negative pressure such as blower (11), and the motor (4) is capable of rotating the rotor (2) in one or the other direction. In the cleaning device a bolt is enclosed in the sleeve (1) and is cleaned with the brush (7) which is driven in contact with the peripheral surface of the bolt by the rotation of the rotor (2). Dust and dirt generated by the cleaning are prevented from leaking out of the sleeve and collected in the suction means of negative pressure. As the rotor (2) rotates in one or the other direction by the motor (4), furthermore, the rotating direction of the brush (7) is set to meet the direction in which the lead of the thread of the bolt advances.

A pipe thread cleaner has cleaning heads with rotated thread brushes driven by motors on the heads. Separate heads for box and pin ends have splash shrouds with gaskets to bear on pipe surfaces. Cleaning fluids under pressure are supplied, selectively, to the heads. The heads have a scavenger system plumbed to a vacuum collector tank. The heads have pipe bore plugs on brush spindle extensions that seal the bore and squeegee the inner pipe surfaces when the heads are removed from the pipe. Optionally, compressed air replaces cleaning fluid to jets in the heads to finally blow dry the cleaned threads. Further options include jets that spin with the brushes and a centrifuge to recover reusable cleaning fluids from the effluent fluids from the cleaning heads.

A tool having opposed cleaning heads for sequentially engaging and cleaning the opposed threaded ends of pipe joints. A pipe end is engaged and cleaned by a brush located on one of the cleaning heads. The pipe is moved longitudinally to position the remaining threaded end near the other cleaning head. The tool is manipulated to position the other cleaning head in contact with the remaining threaded end so that both the box and pin end of a pipe joint can be rapidly and efficiently cleaned.

A power brush for cleaning drill pipe is disclosed utilizing a rotary gun having a rotary power shaft, a handle for gripping the gun and approximately located trigger for actuating the shaft to rotate. A circular baffle plate is mounted securedly to the gun and provides an opening through which the rotary shaft passes during operation with some clearance thus allowing rotation of the shaft with respect to the plate. A cylindrical shroud is affixed to the periphery of the baffle plate forming a closed end portion of the shroud adjacent the gun, the opposite end of the shroud being an open ended portion thereof. A brush carriage is mounted securedly yet removably to the shaft for rotation therewith, the carriage providing a generally circular hub having a hub opening through which the shaft passes and then attaches during operation. A plurality of inwardly facing channels are securedly and equi-radially affixed about the periphery of the hub and are mounted at one end of the channel to the hub projecting outwardly therefrom along the line which eventually intersects the axis of the shaft. Each of the channels carries a wire brush having a plurality of projecting bristles spaced along the length thereof with the bristles of each of the brushes secured within the channels registering with the threads of the drill pipe being cleaned.

A power actuated cleaner for cleaning the threads on the ends of tubular members including a housing having a rotatable disc in the housing with power means connected to the disc for rotating the disc. A plurality of cleaning brushes are provided, each of which is connected to one of a plurality of brush adjusting arms. The brush arms are pivotally connected to the disc with a releasable connection between the adjusting arms and the disc whereby the arms may be rotated on the disc for moving the brushes for coacting with different sized pipe. The housing includes an opening at one end with a plurality of guide adjusting arms, each of which supports a guide support for a pipe, pivotally connected to the housing about the opening. A releasable connection between the adjusting arms and the housing allows the guide arms to be rotated on the housing for guiding and aligning different sized pipe into the opening. Coacting indicators are positioned between the brush adjusting arms and the disc and between the guide adjusting arms and the housing indicating the adjusted position of the arms. A conduit extends from the outside to the inside of the housing and is carried by the rotatable disc. An air supply and a solvent supply is connected to the conduit with a valve which may be alternately actuated to spray solvent on the threads or blow cleaning air on the threads.