Yao Fu Technology Co., Ltd.

1.OD.:79.4~279.4mm 2.Yield strength>758 3.Tensile strength >827 4.Elongation>20 5. API 6. good quality

1.Certified by ISO9001&API 2. High quality with reasonable price3. Fast drilling rate 4. Strong cutting structure durability 5. Different sizes as

Specifications Yao Fu CORE BIT for Oil Well/Core Drill 1) Fast drilling rate 2) Strong cutting structure durability 3) resonable price

Specifications 1.Bit API&ISO 9001 2.Bit steel/TCI tooth bit 3.Bit IADCYC537 4.Bit high speed 5.Bit high quality with good price

Specifications 1.conical teeth and hard-facing 2.Reliable bearing system 3.Fast drilling rate 4.Strong cutting structure durability 5.API

1.section shape: round 2.Technique: hot rolled 3.Pipe type: seamless 4.Alloy or not: non-alloy 5. All API Code

Drill Collar is mainly used to provide bit weight to drill bit so that drill pipe is in tension. Especially drill collar can keep drill bit centralize

Spiral grooves will enable the mud to flow freely around the drill collar to use balance pressure to prevent the formation of obstruction so as to eff