DEVICE FOR REMOVAL OF ASPHALTENE-RESIN-WAX AND/OR WAX-HYDRATE DEPOSITS Russian patent published in 1998 - IPC

FIELD: oil-and-gas producing industry; applicable in removal of wax-hydrates in gas wells and/or asphaltene-resin-wax and wax-hydrate deposits in tubings and bottom-hole formation zones in oil production. SUBSTANCE: device is made in the form of solid bulk of alkali metal or calcium with insulating coating which is used in the form of aluminum or zinc foil with a layer of bitumen or grease applied to its surface with weighting compound or aluminum paint or bitumen varnish. The device may be circular, oval or rectangular in cross-section and globule is in the form of oblong droplet. Weighting agents are used in the form of fine-dispersed metal or sand, metal salts dissolving in oil and/or in water. Thickness of layer or bitumen or grease is 0.1-5 mm. Maximum size in cross-section for rod and globule is from 1 to 50 mm and length from 4 to 1000 mm. Diameter of ball and Rashig rings is from 1 to 50 mm. EFFECT: higher efficiency of elimination of gas-hydrate blocks in gas wells and asphaltene-resin-wax and wax-hydrate plugs in oil wells. 4 cl, 14 dwg