Circulating head is a crossover sub installed on the top of drill pipe, It is connected with circulating system through union for circulating drilling fluid. The sub has always 2″LP pin connection up, connecting circulating system; and drill pipe pin down , connecting drill pipe. Union is to be ready by user.
The blast joint acts for conversion and connection of drill stem component in petroleum, natural gas and geology drilling work. It is the main tool for connecting the upper drilling tool with the lower drilling tool. The middle of the blast joint has vulcanized rubber to protect the inside wall of the casing and prevent the drill pipe from eccentric wear.
FLOAT VALVE SUB
Float valve is a necessary tool of oil drilling. The float valve sub is a bit sub, and mainly includes near bit float valve sub and string float valve sub. The function is to prevent the mud from bring the drilling cuttings, the silt reverse flow; the bit wellbore is jammed; when blowout, float valve assembly close the wellbore automatically to prevent from spouting in the pipe.
Tool Joints acts for conversion and connection of drill stem component in petroleum, natural gas and geology drilling work. It is used mainly for connecting of upper drill tools and lower drill tools.
Crossover sub acts for conversion and connection of drill stem component in petroleum, natural gas and geology drilling work. It is used mainly for connecting of upper drill tools and lower drill tools.
TORQUE REDUCTION SUB
Torque reduction sub is to reduce the excessive torque generated by drilling in short radius horizontal section and large angle well section. It is mainly connected between short radius horizontal section and large angle well section, propose to connect a torque reduction sub by every 60ft, it can reduce 25-35% torque after using this tool, it’s slip spiral inner sleeve, straight rib outer sleeve and body mandrel are relatively in non-rotating condition.
The main purpose of hydro cleaner is to remove cement, sand, residual bullets after perforation, scratches, paraffin, burrs and other objects remaining on the inner wall of casing, keep the inner wall of casing clean so that it can run in various downhole tools. Normally used in horizontal wells and extended reach well. Its double spiral blades structure can effectively remove debris on inner wall, and at the same time, the hardfacing material can effectively improve service life of drill pipe.