Hei Longjiang North Shuangjia Drilling Tools Co., Ltd

heilongjiang north shuangjia drilling tools co., ltd which specializes in manufacturing drilling tools for more than 40 years, it belongs to China military enterprise and has top quality.We specialize in manufacturing all kinds of drilling stabilizers, hydraulic adjustable stabilizer, roller reamer, non-magnetic drilling stabilizers, special stabilizer with reamer and back reamer, hole opener, under reamer, Square Kelly, hexagonal Kelly, drill pipe, spiral heavy weight drill pipe, heavy weight drill pipe, spiral drill collar, standard drill collar, non-magnetic drill collar, spiral non-magnetic drill collar, series of drilling jars (mechanical drilling jar, hydraulic drilling jars, double acting drilling jar, , fishing jars ( bumper sub, surface jar, jar intensifier), IBOP for top drive(VARCO), fishing tools (fishing overshot, fishing spear, junk basket, fishing magnet, ditch magnet, junk sub, taper tap, die collar, internal hook, external hook) , mechanical/hydraulic internal/external cutters, all kinds of junk mills (flat bottom junk mill, concave bottom junk mill, skirted junk mill, pilot mill, tapered mill, bladed junk mill, watermelon mill, economill), washover tools, core tools, drill bits, float collar, float shoes, stab-in float collar, stab-in float collar and shoes, floatation collar, reamer shoe, guide shoe, casing scraper, key seat wiper, Kelly valve, full opening safety valve, drop-in check valve, arrow back pressure valve, inside bop, float valve sub, by-pass valve, cup tester, oriented bent sub, wear sub, circulating sub, reduce sub, lifting sub, saver sub, oriented sub, multicycle circulating sub, high speed bypass valve, impression block, safety joint, mud bucket, wiper, Kelly bushing, casing, tubing, casing running tool, drill rig package.