Roller is a rotary body with screw blades and three integrated rollers that rotate continuously, minimizing surface area and assosiated friction, providing greater stability and reliability in the most harsh environments.
Rollers reduce the downhole torque typically experienced using fixed-blade stabilizers which have greater contact area with hole walls. Compared to standard stabilizer wth stationary blades, rollers decrease well damage in brittle formations. Rollers are also less subect to wear in abrasive formations compared to standard blades.
|Connection||6,5/8 REG (З152) pin|
|Connection||6,5/8 REG (З152) box|
|Make up torque||6 500...7 000 kgf∙m|
|Roller OD||311.2 mm|
|Housing OD||210 mm|
|Totsl length||2000 mm|
|Qty of rollers||3 ea|
|Optimum flow rate||30-75 l/s|
|Drilling fluid specs: — sand, %, max||1|
|Drilling fluid specs: — oil, %, max||10, up to 100% possible|
|Max. Tempetature of fluid||150 deg. С (high temp up to 250)|
|Max. Axial load||290 000 kgf|
|Max. Tensile load during emergency POOH||410 000 kgf|
|Max. torque||8 400 kgf∙m|