How Rotary Seals Used in Roller Reamers?

Sealed roller reamers are used by the oil & gas industry during well drilling operations. The primary purposes of roller reamers are to ream the wellbore to size, eliminating tight spots caused by a worn, under-gauge drill bit, and to help to true up the wellbore, smoothing over ledges and other wellbore defects that can hamper other well preparation operations. The use of sealed roller reamers also helps to locally center the drill string, serving as a stabilizer. This helps the drilling operation to continue in the intended direction, by minimizing drill string angle-induced course deviation.

A typical sealed roller reamer employs a set of at least three roller-cutters that are mounted in an equally spaced fashion around a longitudinally slotted hollow body that is threaded to the drill string. Each roller-cutter is mounted in, and projects slightly from, a separate longitudinal slot. As the drill string rotates, the roller-cutters roll around the wellbore, reaming the wellbore to size. The rolling action helps to reduce drill string-to-wellbore friction, compared to conventional stabilizers. The reduced frictional torque helps to minimize violent stick-slip related high speed drill string rotation and vibration, which helps to prolong the life of the various components of the bottom hole assembly.

Sealed reamers require that a reservoir of bearing lubricant be provided. They also require that the pressure of the lubricant be balanced to the ambient pressure of the well, so that the roller reamer seals are not exposed to high differential pressure.

Vigor's Sealed Bearing Roller Reamers were used in Domestic oil field and have been recognized by customers for their product quality. Our technical engineers have many years of field experience and can help you choose the most suitable product.If you need high-quality Sealed Bearing Roller Reamers, please do not hesitate to contact Vigor's professional technicians to get the best product support and technical support.