Patent GB-1481533-A (GB)
Title: Well kickover tool
IPC: E21B23/03
Filed: 1974-07-31
Abstract: 1481533 Well kickover tools OTIS ENG CORP 31 July 1974 [1 Aug 1973 24 July 1974] 33818/74 Heading E1F A kickover tool for use in installing a gas lift valve or other device in or retrieving it from a side pocket 11 of a tubing mandrel 10 includes an upper housing 24 connected by a ball joint 25, 27 to a lower housing 28, 29 having a recess 28p in which an arm 22 is supported on a pivot pin 46, the arm in turn pivotally supporting via pin 48 a valve &c carrier 47 or pulling device (Fig. 11, not shown). The tool is run into the mandrel of interest and then picked up so that a key 17 can cooperate with. an orienting shoe 15 to orient the tool so that recess 28p is aligned with the side pocket, the key 17 being pivotally supported by a shear pin 30 in a housing 18 pivotally connected at 31-33 to the housing 28, 29. Continued raising of the tool brings lugs 21 carried by a sleeve 53 into abutment with a mandrel shoulder 14 so that housing 24 moves upwards relative to the sleeve 53 against the action of spring 62 and until a ring 66 secured to fitting 26 by shear pins abuts the sleeve, at which stage balls 58 carried by the housing can move into groove 65 in the sleeve and release tool mandrel 36 which, is then driven upwards by spring 45 so that crank 39 rotates the arm 22 from its retracted position, in which surface 22d thereon is engaged by surface 47a on the carrier 47 (or the pulling device), and a laterallyextended position (Fig. 14) in which surface 22c of the tool abuts surface 28a of the slot 28p, the carrier (or pulling device) rotating as the arm is extended until surface 47b abuts surface 22e. The arm may be positively held in its extended position by a shear pin 81 (Fig. 15) which snaps into a hole 28c opening into slot 28p. Once the arm is extended, the tool is lowered to introduce a valve &c 12 into the side pocket or to engage a valve already in the pocket and is then raised again until lugs 21 again contact the shoulder 14, at which stage the shear pins 67 are fractured and the housing 24 moves upwards relative to the sleeve to align groove 68 with the lugs 21 so that the latter can move up past the shoulder, the spring 62 subsequently driving the sleeve back to its previous position but allowing the lugs to ride past obstacles as the tool is brought to the surface, the arm 22 having first being retracted by engagement with the upper end of the tubing mandrel which causes fracture of the shear pin 81. During movement of the tool into the well, whenever the lugs 21 meet an obstacle the housing 24 aligns groove 54 with the lugs to allow them to move past the obstacle, the sleeve being reset and the lugs consequently reset after each such occasion by spring 55. In a modification, the arm 22 may carry two aligned shear pins movable into opposing holes to latch the arm in its extended position, these pins suitably being mounted in bushes once their original mounting holes have worn. If desired, two such tools can be run in tandem, the upper being operated to retrieve a valve &c from a side pocket and the lower then being operated to instal the replacement valve &c. The tool(s) may be run in on a wireline or with a pumpdown train.