How to choose the right downhole motor part 1

Landrill developed series of downhole motor specifications from 43-286mm , Total 24 models:43 、45、54 、60 、73 、89 、95 、102 、105、120 、127 、140、159 、165 、172 、178 、185、197 、203 、210 、216、228、244 、286mm.

How to choose the right OD of landrill mud motor ?

When drilling in downhole,the size of bit should be used according to the following list . if not, the probability of accidents will increase ,such as sticking of tool, shaft rupture and falling in well,etc..

The influenceof No. of stage and lobe for landrill mud motor

Spiral seal line on rotor is divided into single end and multi-end (stator with one more end than rotor) .The less ends the mud motor has the higher speed and the lower torque is . The more ends it has the lower torque is. The moroe ends it has the lower speed and the higher torque. We can produce the ratio is 1：2、3：4、5：6、7：8、9：10 downhole motors , shows the sectional profile of several typical motors

Division of critical temperature for working in downhole for landrill downhole motor

According to the temperature of the stator to provide the following specifications:

Note: High temperature motors for conventional wells is difficult to obtain good results

By Media offers the following specifications of the stator:

ZZJ-02 (Conventional Stator elastomer): For common mud system, the use of temperature below 120 ℃, the stator elastomer is high strength, wear resistance, long life under conventional temperature operation.

ZYN-02 (Oil Resistqancethe stator elastomer): For oil-based mud system and common mud system, temperature below 120 ℃in oil-based mud that has excellent oil capacity expansion characteristics.

ZGYN-180 (high-temperature oil-base mud the stator elastomer): use in high temperature, high oil mud system, the elastomer used under the conditions of 180 ℃and high oil content, the show results: high-oil-resistant adhesive strength under high temperature , tear strength and other properties remain high, plus a reasonable amount of interference co-ordination, oil-resistant rubber in high-temperature, high-oil-based mud conditions can have a better use of results, now in the Liaohe, Daqing, Xinjiang oilfield successful running.