Oil well tubing cleaner

Claim 1

In combination with an oil well tubing puller of the type that includes a power-drawn vehicle, a vertically positionable mast mounted on said vehicle, first power means for raising said mast to and lowering said mast from a substantially vertical position, a tubing puller assembly, second power means for raising and lowering said tubing puller and a string of tubing engaged thereby into and out of a well bore, a device for cleaning the interior of said string of oil well tubing of foreign material when said tubing is removably supported in said well bore by slips that engage said tubing string under the uppermost collar thereon, said oil well tubing cleaning device including: a. a power operated drum on said vehicle; b. pulley means mounted on the end of said mast that is most upwardly disposed when said mast is in a substantially vertical position; c. a cable that engages said drum and pulley means, said cable having a first end that is longitudinally movable relative to said mast; d. a frame assembly adjacently disposed to said mast and longitudinally movable relative thereto when said mast is vertically positioned; e. a motor supported by said frame assembly; f. an elongate driven member that extends downwardly from said motor, said member having a first free end; g. a cutter mounted on said first end of said member, said cutter when rotated and disposed in said tubing moving longitudinally downwardly therethrough to scrape foreign material from the interior surface of said tubing, with the transverse cross section of said cutter being slightly smaller than the interior transverse cross section of said tubing; h. a plurality of telescopically engaging tubular guide members adjacently disposed to said mast; i. stop means for preventing said tubular guide members from separating when said guide members are fully extended; j. a horizontal rigid stop secured to the top portion of the one of said tubulaR guide members that occupies the uppermost position when said tubular guide members are fully extended, said stop having a bore therein through which said cable extends; k. first means for securing said first end of said cable to said frame assembly; l. second means on said frame assembly for movably engaging said uppermost one of said tubular guide members to maintain said frame assembly at a fixed lateral position relative thereto; m. a plurality of rigid arms secured in normally disposed positions to said guide members, with each of said arms having a first free end; n. a plurality of axially aligned bushings mounted on said first ends of said arms, said bushings being slidably and rotatably engaged by said elongate member, and said bushings preventing lateral deformation of said elongate member as the latter is driven by said motor; o. third means for removably engaging the lowermost one of said guide members to hold said guide members at a predetermined fixed lateral distance from said well bore; and p. fourth means for driving said motor to rotate said cutter, with said cutter when said drum is rotated in a first direction moving downwardly in said tubing string to scrape foreign material from the interior thereof, and said tubular guide members telescoping one into the other as said cutter moves downwardly into said tubing string until the lower end of what was previously said uppermost tubular guide member rests on said cut, and said frame assembly and motor thereafter moving downwardly and longitudinally on what was previously said uppermost tubular guide member for said cutter to scrape the maximum longitudinal length of said tubing, and said poweroperated drum after said tubing has been scraped rotated in a second direction to return said frame assembly, cutter and guide members to elevated positions where said cutter and guide members no longer engage said tubing and third means, with said oil well tubing cleaning device then capable of being moved laterally relative to said well bore to a position where said oil well tubing puller may raise said string of tubing to permit the stand thereof that has been cleaned to be separated therefrom.