DEVICE FOR WELL CLEANING FROM ORGANOMECHANICAL SEDIMENTS Russian patent published in 1997 - IPC

FIELD: oil producing industry; devices and equipment for cleaning of well strings from organomechanical sediments. SUBSTANCE: device has body with ports in which cleaning members are arranged, pusher engageable with cleaning member and made in form of wedge, and device for locking position of cleaning members. Novelty consists in that each cleaning member has load compensator located between cleaning member and pusher. Pusher is spring-loaded relative to body. Locking device is made in form of switch of pusher position. Switch rod is connected with shank made for axial reciprocation. Application of invention makes it possible to carry out more qualitative cleaning of well casing string that, in its turn, prevents failure of downhole pumping equipment and reduces number of downhole repairs caused by inadequate cleaning of casing strings. Reduced labor input and economic expenditures are obviously proved in use of the offered device with cable, in multiple passage of one place, for instance, for preparation of place for packer setting. In this case, all cleaning consists in changing over of cable winch to direct and reverse operation up to complete cleaning, i.e., there is no need in round-trip operations. EFFECT: higher efficiency. 1 dwg