الوصف

The product has the following characteristics:
(1) large annulus, small diameter: drilling in the card to reduce the incidence and pro-drilling mud back out
(2) large ID: reduce power losses mud, effectively improve the drilling efficiency.
(3) Direct-type: the connector body formed by the thickening times. Not weld, you can achieve the same kind of materials such as strength connections, large displacement in directional wells and wells can withstand greater torque.