Being an appointed unit manufacturing downhole motor for CNPC, we introduced a complete set of design and manufacturing technology and special equipment from Smith Inc, USA, including produciotn line for manufacturing and complete machine assembly, production line for heat treatment controlled atmosphere, and production line for stator rubber. In 2000, we have made technology enchancement, capacity expansion and equipment replacement. The current manufacturing capacity has reached the international advanced level.
Now we can produce 18 types of 2 3/8"- 11 1/4" ( Dia. 60-286mm), 3 types of nozzle pressure drop series of 3.5Mpa, 7Mpa and 14Mpa, single head and multi-heads, single bend ,double bends and adjustable angle ranging from 0 degree -3 degree to match with the more than 400 types of downhole motors applied iwth vairous types of centrilalizers. The scope of well hole is 2 7/8"-26" (Dia 73-660.4mm), the output torque is 118-18010 N.M and the output speed is 60-500 rpm.
Downhole motor is a kind of downhole dynamic drilling tool driven by the power of drilling mud. Mud stream from the outlet of a mud pump flows through a by-pass valve into the motor. This stream produces pressure loss at both inlet and outlet of the pump, to push the rotor into rotating, and to transmit the torque and speed onto the bit. The downhole motor property mainly depends on its property parameters.
Downhole motor rotor is manufactured from high quality alloy steel, while s-rotor is made of rubber. High force and tearing strength of the rubber stator allows the tool to run in the high temperatures (about 180 ºC ) and high oil mud condition. All these benefits help to maintain effective operation.
We produce the downhole motor with an external coating on the motor rotor that gives
the tool a much longer service life.
The function of cardan shaft is to convert planetary motion into fixed constant rotation of drive shaft, to transmit torque and speed from motor on the drive shaft and to the bit.
The driveshaft assembly converts the eccentric motion of the rotor into concentric rotation for the bearing assembly. It also accommodates any angle set on the adjustable bent housing (or fixed bend housing) and carries the thrust load from the rotor caused by the pressure drop across the power section.
The drive shaft assembly are forged using superior alloy steel, it gives the shaft assembly good strength and toughness and also greatly improve the anti-fatigue capacity during the rotating movement, thus giving the downhole motor a much longer service life.
Our Downhole motors come in sizes ranging from Φ43mm to Φ286mm.
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