стали зуб немного

steel tooth tricone bit,steel tooth bit, teicone bit,roller bit,cone bit Soft Formation Tooth Bits The 114-117 bits are used to drill low-compressive strength soft formations . Long projection tooth lengths are used on high offset cones to provide the greatest penetration rates possible . Wear-resistant hard facing is used to control tooth wear . On the softest bit types ,this hard facing completely covers the bit teeth . Medium-Hard Formation Tooth Bits The 127 bits are used to high-compressive strength medium hard formations . Short projection teeth with reduced crest length are used in this series of bits designs . Durable hard facing is applied to reduce tooth wear . HeJian HengChang supply all kinds of steel tooth tricone bits. This kind of bits can used for oil field and water well .By the way, we also import all kinds of tricone bits ,drill pipe. If you have interested in our products , please don’t hesitate to contact me . Our purpose is to sell the best quality products at the lowest price. and our aim is build long-term business and friendship with our clients. Contact: Lydia Tel: 0086-18733731021 sizebit typein.mm6152.4136,1276 1/2165.1126,1277 1/2190.5126,136,216,2278 1/2215.9114,124,126,1279 1/2241.3126,1279 5/8244.51279 7/8250.812712 1/4311.1114,126,12713 5/8346117,126,12714 3/4374.61241538112415 1/2393.712417 1/2444.5114 117 124 126 21622558.812424609.612426660.4114