Helper drilling tool

	Blade reamers Blade reamers of bigger diameter are purposed for drilling wells with pilot—bit or for reaming previously drilled wells up to the necessary diameter. Reamers are packaged with changeable blades, easy to change in rig conditions. Cleaning of the bottomhole is carried out through openings in the body. By using reamer for reaming previously drilled out sections of the staft it is recommended to use anti-kickoff device PZU-280, equipped with 6 changeable nozzles, besides one nozzle is directed to bottom, other 5 - up. Acc. to customers' wish we can supply tools withother dimensions.
	Calibrator-reamers Calibrator-reamers are equipped with hard alloy tips and inserts, are purposed to calibrate and reamer borehole areas containing medium, hard and abrasive rocks. Have following modifications: 1) for rock formations of I—III category of hardness "CT" - are equipped only with hard alloy tips; 2) for rock formations of III-IV category of hardness "CTK" - are equipped with hard alloy tips and hard alloy dowels, impregnated with diamond grains. At a client's request ready to supply an instrument with another sizes, different from the data given in the table.
	Underreamers Underreamers are purposed to reamer borehole shaft areas in soft and medium rock formation at every depths. Blades of the underreamer expand to the operating position under pressure drop in a reamer body. Underreamers are supplied with interchangeable blades, easy demountable in drilling conditions. At a client's request we are ready to supply an instrument with other sizes, different from the data given in the table.
	Calibrators Are purposed to calibrate and to reamer boreholes areas, to center drill instrument, optimize BHA work. Have the following modifications: 1) for rock formations of l-lll category of hardness "CT" - are equipped with just hard alloy tips; 2)for rock formations of III-IV category of hardness "CTK" - are equipped with hard alloy tips and hard alloy dowels, impregnated with diamond grains; 3) for rock formations of V-VI category of hardness "TK" - are equipped only with hard alloy dowels, impregnated with diamond grains. Spiral calibrators "ÊÑ" are produced with left spiral "KLC". Other types and sizes are possible upon customers request.
	Tube-cutting device This tools are purposed to cut out the part of the casing or tubing string in a borehole for the further extraction up to the surface during repairing processes. The blades expand into the operating position under pressure drop in the tubing cutter case. Device is supplied with interchangeable blades, easy demountable in drilling conditions. The blades are reinforced with high-quality composite alloy. At a client's request ready to supply an instrument with another sizes, different from the data, given in the table.
	Hydromechanical perforator Perforators PTM 60... 168: usual - of Ê type; to operate in the gas spheres - of G type; to operate up to 6000 m depth - of VD type, are purposed to make openings in casing and tubing strings of home and import production that are located in a borehole for their cavity communicating with out of pipe' area. They let to restore fluid circulation during the repair process and borehole' mastering, to prevent the lifting of tubes with fluid, to make topping-ups into the cement circle out of the casing string, to increase productivity, the production culture, the safety during the repairing process, to reduce the environment pollution. Method of running-in into a borehole - on a wire, on a rope, on a casing string, by free dropping. Generator for breaking through with tubes is potential energy of the fluid lifted in the pipes, pressure of the pumping unit.