Shanghai Shirui International Trading Company Limited

Shanghai, China

It is a kind of high-efficient hydraulic underreamer special designed for enlarging the hole in the deep well. With the pilot shoe, it can be used for enlarging the hole after drilling. Also, with the drill bit, it can be used for enlarging the hole while drilling. Up to now, it has successfully completed reaming tasks in over 500 deep wells (the maximum reaming depth is 8500m till now). features: 1. Applied hydraulic pressure acts on the internal piston and moves blades open to enlarge the hole. 2. Applied blades with special triangle structure to enhance the reaming efficiency. 3. Gauge teeth on every blade to increase the service life of blades and benefit to ream the regular hole. applications: 1. Realize the reduced clearance casing programs (rccps) to reduce the drilling cost. 2. Solve the complex problems caused by creepage of salt-gypsum layer via reaming out the salt-gypsum section. 3. Increase the thickness of the cement mantle between the casing and the hole in the small hole to improve the cement job quality.