Downhole Motors

Downhole Motors

Downhole motor is a kind of downhole dynamic drilling tool drove by the hydraulic power of drilling mud. Rotor drive the shaft and bit rotating to achieve drilling aim . Driven power fluid as oil-based mud, emulsion mud and clay mud. It’s adaptable and flexible ,can be applied to horizontal wells and c...

Downhole motor is a kind of downhole dynamic drilling tool drove by the hydraulic power of drilling mud. Rotor drive the shaft and bit rotating to achieve drilling aim . Driven power fluid as oil-based mud, emulsion mud and clay mud. It’s adaptable and flexible ,can be applied to horizontal wells and cluster wells drilling operators .MTC can supply the following downhole motors :

1. Bent Down-hole motor: The bent angle on the universal axis can fit curvature of kicking off ,Single – bent and double –bent are available , The curvature of kicking-off can achieve 1•/m and shorter length of whole .
2.Uniform thickness down-hole motor : The uniform wall thickness down-hole motor changes the shape of the stator shell to make the stator rubber thin and uniform in order to overcome the conventional technology of drill stator and effectively improve the working environment of down-hole motor
3. Saturated saltwater mud resistant down-hole motor :The special coating layer of rotor has stronger ability of corrosion and wear resistance ,enabling the down –hole motor to work for a long time in saturated saltwater mud .
4.High temperature down-hole motor :The resistant temperature of motor can achieve over 150℃ by the using of excellent resistant temperature rubber in the stator ,With the ability of resistant temperature rubber in the stator ,the requirement of the deep well ,up dell well and high temperature grads areas drilling can be satisfied .
5.Sealed transmission shaft down-hole motor :Converting the mud condition of thrust axletree and radial axletree,make the whole downhole motor life long .

By-Pass valve assembly 
It has two positions of by-pass and close (Fig.1). It is in by-pass position during trip operation, circulates mud fluid in the drill string into the annular space by-passing the idle motor,so that no mud may spray out onto the platform during the trip operation. When mud flow rate and pressure reach the setting value, the valve stem moves down and closes the valve. Meanwhile, mud stream flows through the motor, and converts the pressure energy into mechanical energy. As mud flow rate is too low, or mud pump stops, and as the created pressure is not enough to overcome spring force and static friction force, the spring presses the stem upward, and by-pass valve is in open position. Normal situation ,deep-hole ,highly-deviated well, horizontal well usually use alternative joint (FIG 1-1)

Motor assembly 
It consists of stator and rotor. Stator is made by squeezing rubber sleeve on the inner wall of steel tube. Rubber sleeve inner hole forms spiral structure with a certain geometric parameter. Rotor is a screw rod with chrome-plated layer.
MTC  motors has following advantages :
1.Stator and rotator are made of 42CrMo material ,whose rigidity can reach up to HB285-341 & HB260-300 , mechanical property of material got very big enhancement .

2.Enable optimize and design the line  according to the requirement of customers and usage , significantly improving the efficiency of whole tool 
3.Full range of motors used for different drilling sites is available.According to working temperature :
a)        Normal temperature stator : Rated temperature is 95℃,highest temperature is 120℃;
b)        High temperature stator : Rated temperature is 105℃,highest temperature is 150℃
c)        Ultra high temperature of the stator : Rated temperature is 165℃,highest temperature is 180℃
By mud type :
a)        Water-base mud
b)        Oil-base mud
c)        High saturated salt mud
To increase hydraulic horsepower and upward speed of mud stream, rotor is manufactured into hollow rotor with nozzles. 

Interference size of rotor and stator can as different service condition of customers to recommend different matching size ,which can enhance the service life of motors and working efficiency 
MTC uniform wall thickness down-hole motor has the following advantages :
a)      Single stage bear high pressure ,improved system efficiency ;
b)      Fine thermal efficiency ,significantly enhanced the service life of stator
c)      Even rubber swelling ,more stability of stator ;
d)      Improved the binding area and adhesive strength between rubber and metal , used in a wider range, more optimized structure, and lighter quality;

MTC can provide rotors within different medium according to working condition ;
a)        Conventional rotor : chrome-faced ，suiting for water base fluids and oil-base fluids ;
b)        Tungsten carbide rotor : surface spraying tungsten carbide, suiting for saturated saltwater mud
c)        Ceramic rotor : surface spraying ceramic, suiting for saturated saltwater mud
Universal shaft  assembly
The function of cardan shaft is to convert planetary motion into fixed constant rotation of drive shaft, to transmit torque speed from motor on the drive shaft, and to the bit. Cardan shaft mostly use flat shaft, but some are flexible shafts. (Figure 3)

After using tools ,operators should tear down and check the cardan shaft quickly, who should replace the quick-wear part if the degree of abrasion beyond the repair standards ,otherwise ,the tools will not work normal because of overuse cardan shaft
The maximum angle of adjustable cardan shaft can up to 0-4°,also can customized for more adjustable range shell to meet the requirement of working condition . (Figure 3-1)

Drive shaft assembly
Drive shaft is to transmit motor rotary dynamic force onto the bit , meanwhile bearing axial and radial load from drilling weight .MTK can manufacture two types drive shaft like following :
       a)        7.0Mpa bit nozzle pressure ,using hard alloy radial bearing and drive shaft assembly with thrust bearings ;
        b)        14.0Mpa bit nozzle pressure, using hard alloy radial bearing and PDC cutter flat thrust bearing .It is longer lasting lift and higher bearing capacity .
MTC drive shaft undergoing machine – shaping after forging consist of 40CrNiMoA high performance alloy steel material .
To meet drilling needs ,MTC drive shaft assembly equipped sorts of stabilizers, which include fixed type and replaceable type for choosing according to drilling process .( Figure 4.)



Model

Outer Diameter   (mm)

Lobe

Stage

Length of drilling rig   length

Effective length of stator

Max Diameter of   Drive Shaft Assembly (mm)

Lower Boom   Length (mm)

Up Thread

Down Thread

5LZ43×7.0 M-4

43

5:6

4

1707

820

43

\

1AMMT

1AMMT

5LZ45×7.0 M-3

45

5:6

3

1927

1040

45

\

1AMMT

1AMMT

5LZ54×7.0 M-3

54

5:6

3

2119

1130

54

\

1REG

1REG

7LZ54×7.0 M-4

54

7:8

4

2699

1710

54

\

1REG

1REG

5LZ60×7.0 M-3

60

5:6

3

3745

1850

60

\

1REG

1REG

5LZ73×7.0 M-7

73

5:6

7

4717

2850

73

813

2 3/8REG (3-66)

2 3/8REG (3-66)

5LZ79×7.0 M-4

79

5:6

4

4355

2450

79

779

2 3/8REG (3-66)

2 3/8REG (3-66)

5LZ79×7.0 M-5

79

5:6

5

4855

3000

79

779

2 3/8REG (3-66)

2 3/8REG (3-66)

7LZ79×7.0 M-4

79

7:8

4

3525

1650

79

779

2 3/8REG (3-66)

2 3/8REG (3-66)

7LZ79×7.0 M-4

79

7:8

4

3525

1650

79

779

2 3/8REG (3-66)

2 3/8REG (3-66)

5LZ89×7.0 M-4

89

5:6

4

4759

2450

89

1103

2 3/8REG (3-66)

2 3/8REG (3-66)

4LZ95×7.0 M-5

95

4:5

5

5619

3050

95

1062

NC-31 (3-86)

2 7/8REG (3-76)

5LZ95×7.0 M-3

95

5:6

3

4419

1850

95

1062

NC-31 (3-86)

2 7/8REG (3-76)

5LZ95×7.0 M-5

95

5:6

5

5619

3050

95

1062

NC-31 (3-86)

2 7/8REG (3-76)

5LZ95×7.0 M-7

95

5:6

7

5979

3410

95

1062

NC-31 (3-86)

2 7/8REG (3-76)

7LZ95×7.0 M-3

95

7:8

3

4419

1850

95

1062

NC-31 (3-86)

2 7/8REG (3-76)

7LZ95×7.0 M-10.1

95

7:8

10.1

7869

5300

95

1062

NC-31 (3-86)

2 7/8REG (3-76)

7LZ95×7.0 M-6.7

95

7:8

6.7

6749

4180

95

1062

NC-31 (3-86)

2 7/8REG (3-76)

9LZ95×7.0 M-4

95

9:10

4

5019

2450

95

1062

NC-31 (3-86)

2 7/8REG (3-76)

5LZ105×7.0 M-4

105

5:6

4

4898

2450

105

1138

3 1/2REG (3-88)

2 7/8REG (3-76)

5LZ105×7.0   M-10.1

105

5:6

10.1

7768

5320

105

1138

3 1/2REG (3-88)

2 7/8REG (3-76)

7LZ105×7.0 M-6

105

7:8

6

6678

4230

105

1138

3 1/2REG (3-88)

2 7/8REG (3-76)

9LZ105×7.0 M-6

105

9:10

6

6458

4010

105

1138

3 1/2REG (3-88)

2 7/8REG (3-76)

7LZ108×7.0 M-6

108

7:8

6

6818

4370

108

1138

3 1/2REG (3-88)

2 7/8REG (3-76)

5LZ120×7.0 M-5

120

5:6

5

7192

4540

120

1223

NC-38(З-102)

3 1/2REG (3-88)

5LZ120×7.0 M-6

120

5:6

6

7892

5240

120

1223

NC-38(З-102)

3 1/2REG (3-88)

7LZ120×7.0 M-4

120

7:8

4

6282

3630

120

1223

NC-38(З-102)

3 1/2REG (3-88)

7LZ120×7.0 M-6.5

120

7:8

6.5

8522

5870

120

1223

NC-38(З-102)

3 1/2REG (3-88)

7LZ120×7.0 M-7

120

7:8

7

7092

4420

120

1223

NC-38(З-102)

3 1/2REG (3-88)

7LZ120×7.0 M-8

120

7:8

8

7692

5040

120

1223

NC-38(З-102)

3 1/2REG (3-88)

4LZ127×7.0 M-6

127

4:5

6

7052

4400

127

1223

NC-38(З-102)

3 1/2REG (3-88)

4LZ127×7.0 M-5

127

4:5

5

6332

3680

127

1223

NC-38(З-102)

3 1/2REG (3-88)

5LZ127×7.0 M-5

127

5:6

5

7022

4370

127

1223

NC-38(З-102)

3 1/2REG (3-88)

7LZ127×7.0 M-4

127

7:8

4

6282

3630

127

1223

NC-38(З-102)

3 1/2REG (3-88)

7LZ127×7.0 M-7

127

7:8

7

7092

4420

127

1223

NC-38(З-102)

3 1/2REG (3-88)

7LZ135×7.0 M-5

135

7:8

5

7775

4450

135

1280

NC-38(З-102)

3 1/2REG (3-88)

7LZ140×7.0 M-5

140

7:8

5

7425

4100

140

1495

NC-50(З-133)

4 1/2REG (3-117)

5LZ159×7.0 M-5

159

5:6

5

8067

4250

159

1939

NC-50(З-133)

4 1/2REG (3-117)

7LZ159×7.0 M-3

159

7:8

3

7227

3410

159

1939

NC-50(З-133)

4 1/2REG (3-117)

4LZ165×7.0 M-7

165

4:5

7

9257

5440

165

1872

NC-50(З-133)

4 1/2REG (3-117)

5LZ165×7.0 M-4

165

5:6

4

7227

3410

165

1872

NC-50(З-133)

4 1/2REG (3-117)

5LZ165×7.0 M-5

165

5:6

5

8067

4250

165

1872

NC-50(З-133)

4 1/2REG (3-117)

5LZ165×7.0 M-6

165

5:6

6

8907

5090

165

1872

NC-50(З-133)

4 1/2REG (3-117)

7LZ165×7.0 M-5

165

7:8

5

9617

5800

165

1872

NC-50(З-133)

4 1/2REG (3-117)

4LZ172×7.0 M-7

172

4:5

7

9257

5440

172

1867

5 1/2FH (З-147)

4 1/2REG (3-117)

5LZ172×7.0 M-4

172

5:6

4

7227

3410

172

1867

5 1/2FH (З-147)

4 1/2REG (3-117)

5LZ172×7.0 M-5

172

5:6

5

8067

4250

172

1867

5 1/2FH (З-147)

4 1/2REG (3-117)

5LZ172×7.0 M-6

172

5:6

6

8907

5090

172

1867

5 1/2FH (З-147)

4 1/2REG (3-117)

6LZ172×7.0 M-6.5

172

6:7

6.5

8417

4600

172

1867

5 1/2FH (З-147)

4 1/2REG (3-117)

7LZ172×7.0 M-5

172

7:8

5

8437

4620

172

1867

5 1/2FH (З-147)

4 1/2REG (3-117)

7LZ172×7.0 M-5.5

172

7:8

5.5

8897

5080

172

1867

5 1/2FH (З-147)

4 1/2REG (3-117)

7LZ172×7.0 M-6

172

7:8

6

9347

5530

172

1867

5 1/2FH (З-147)

4 1/2REG (3-117)

7LZ172×7.0 M-5.7

172

7:8

5.7

10027

6210

172

1867

5 1/2FH (З-147)

4 1/2REG (3-117)

7LZ172×7.0 M-7.5

172

7:8

7.5

10167

6350

172

1867

5 1/2FH (З-147)

4 1/2REG (3-117)

3LZ178×7.0 M-6

178

3:4

6

8832

5090

178

1923

5 1/2FH (З-147)

4 1/2REG (3-117)

4LZ178×7.0 M-7

178

4:5

7

9172

5440

178

1923

5 1/2FH (З-147)

4 1/2REG (3-117)

5LZ178×7.0 M-4

178

5:6

4

7152

3410

178

1923

5 1/2FH (З-147)

4 1/2REG (3-117)

5LZ178×7.0 M-5

178

5:6

5

7992

4250

178

1923

5 1/2FH (З-147)

4 1/2REG (3-117)

5LZ178×7.0 M-6

178

5:6

6

8832

5090

178

1923

5 1/2FH (З-147)

4 1/2REG (3-117)

5LZ178×7.0 M-7

178

5:6

7

10292

6560

178

1923

5 1/2FH (З-147)

4 1/2REG (3-117)

6LZ178×7.0 M-6.5

178

6:7

6.5

8962

5230

178

1923

5 1/2FH (З-147)

4 1/2REG (3-117)

7LZ178×7.0 M-5

178

7:8

5

8362

4620

178

1923

5 1/2FH (З-147)

4 1/2REG (3-117)

7LZ178×7.0 M-5.5

178

7:8

5.5

8897

5080

178

1867

5 1/2FH (З-147)

4 1/2REG (3-117)

7LZ178×7.0 M-5.7

178

7:8

5.7

9952

6210

178

1923

5 1/2FH (З-147)

4 1/2REG (3-117)

7LZ178×7.0 M-6 B

178

7:8

6

9262

5530

178

1923

5 1/2FH (З-147)

4 1/2REG (3-117)

7LZ178×7.0 M-6 I

178

7:8

6

8932

5090

178

1923

5 1/2FH (З-147)

4 1/2REG (3-117)

7LZ178×7.0 M-6

178

7:8

6

8932

5200

178

1923

5 1/2FH (З-147)

4 1/2REG (3-117)

F7LZ178×7.0 M-6

178

7:8

6

8932

5200

178

1923

5 1/2FH (З-147)

4 1/2REG (3-117)

7LZ178×7.0 M-7

178

7:8

7

8992

5260

178

1923

5 1/2FH (З-147)

4 1/2REG (3-117)

7LZ178×7.0 M-7.5

178

7:8

7.5

10092

6350

178

1923

5 1/2FH (З-147)

4 1/2REG (3-117)

7LZ185×7.0 M-7

185

7:8

7

9672

5930

185

1923

5 1/2FH (З-147)

6 5/8REG (З-152)

3LZ197×7.0 M-7

197

3:4

7

10063

5930

197

2184

5 1/2FH (З-147)

6 5/8REG (З-152)

4LZ197×7.0 M-6

197

4:5

6

9223

5090

197

2184

5 1/2FH (З-147)

6 5/8REG (З-152)

5LZ197×7.0 M-4

197

5:6

4

7543

3410

197

2184

5 1/2FH (З-147)

6 5/8REG (З-152)

5LZ197×7.0 M-5

197

5:6

5

8383

4250

197

2184

5 1/2FH (З-147)

6 5/8REG (З-152)

5LZ197×7.0 M-6

197

5:6

6

9223

5090

197

2184

5 1/2FH (З-147)

6 5/8REG (З-152)

6LZ197×7.0 M-5

197

6:7

5

8383

4250

197

2184

5 1/2FH (З-147)

6 5/8REG (З-152)

6LZ197×7.0 M-6

197

6:7

6

9223

5090

197

2184

5 1/2FH (З-147)

6 5/8REG (З-152)

9LZ197×7.0 M-4

197

9:10

4

7543

3410

197

2184

5 1/2FH (З-147)

6 5/8REG (З-152)

7LZ197×7.0 M-5

197

7:8

5

8383

4250

197

2184

5 1/2FH (З-147)

6 5/8REG (З-152)

4LZ203×7.0 M-6

203

4:5

6

9397

5090

203

2192

5 1/2FH (З-147)

6 5/8REG (З-152)

5LZ203×7.0 M-5

203

5:6

5

8857

4550

203

2192

5 1/2FH (З-147)

6 5/8REG (З-152)

5LZ203×7.0 M-6

203

5:6

6

9757

5450

203

2192

5 1/2FH (З-147)

6 5/8REG (З-152)

7LZ203×7.0 M-5

203

7:8

5

8557

4250

203

2192

5 1/2FH (З-147)

6 5/8REG (З-152)

3LZ210×7.0 M-7

210

3:4

7

10364

5930

210

2243

6 5/8REG (З-152)

6 5/8REG (З-152)

7LZ210×7.0 M-5

210

7:8

5

8704

4250

210

2243

6 5/8REG (З-152)

6 5/8REG (З-152)

7LZ210×7.0 M-7

210

7:8

7

10104

5650

210

2243

6 5/8REG (З-152)

6 5/8REG (З-152)

5LZ210×7.0 M-5

210

5:6

7

10104

5650

210

2243

6 5/8REG (З-152)

6 5/8REG (З-152)

5LZ216×7.0 M-6

216

5:6

6

9544

5090

216

2243

6 5/8REG (З-152)

6 5/8REG (З-152)

7LZ216×7.0 M-5

216

7:8

5

8704

4250

216

2243

6 5/8REG (З-152)

6 5/8REG (З-152)

5LZ228×7.0 M-6

228

5:6

6

9544

5090

228

2243

6 5/8REG (З-152)
  или
  6 5/8 FH (З-171)

6 5/8REG (З-152)

3LZ244×7.0 M-4

244

3:4

4

10633

6000

244

2371

6 5/8REG (З-152)
  или
  6 5/8 FH (З-171)

6 5/8REG (З-152)
  или
  7 5/8REG (З-177)

3LZ244×7.0 M-6

244

3:4

6

10783

6210

244

2371

6 5/8REG (З-152)
  или
  6 5/8 FH (З-171)

6 5/8REG (З-152)
  или
  7 5/8REG (З-177)

F3LZ244×7.0 M-6

244

3:4

6

10783

6210

244

2371

6 5/8REG (З-152)
  или
  6 5/8 FH (З-171)

6 5/8REG (З-152)
  или
  7 5/8REG (З-177)

5LZ244×7.0 M-4

244

5:6

4

8663

4080

244

2371

6 5/8REG (З-152)
  или
  6 5/8 FH (З-171)

6 5/8REG (З-152)
  или
  7 5/8REG (З-177)

5LZ244×7.0 M-5

244

5:6

5

9673

5090

244

2371

6 5/8REG (З-152)
  или
  6 5/8 FH (З-171)

6 5/8REG (З-152)
  или
  7 5/8REG (З-177)

5LZ244×7.0 M-6

244

5:6

6

10683

6100

244

2371

6 5/8REG   (З-152), 6 5/8 FH (З-171)

6 5/8REG (З-152)
  или
  7 5/8REG (З-177)

C5LZ244×7.0 M-4

244

5:6

4

9673

5090

244

2371

6 5/8REG (З-152)
  или
  6 5/8 FH (З-171)

6 5/8REG (З-152)
  или
  7 5/8REG (З-177)

7LZ244×7.0 M-4

244

7:8

4

8663

4080

244

2371

6 5/8REG (З-152)
  или
  6 5/8 FH (З-171)

6 5/8REG (З-152)
  или
  7 5/8REG (З-177)

C7LZ244×7.0 M-4

244

7:8

4

9693

5110

244

2371

6 5/8REG (З-152)
  или
  6 5/8 FH (З-171)

6 5/8REG (З-152)
  или
  7 5/8REG (З-177)

7LZ244×7.0 M-5

244

7:8

5

10113

5530

244

2371

6 5/8REG (З-152)
  или
  6 5/8 FH (З-171)

6 5/8REG (З-152)
  или
  7 5/8REG (З-177)

7LZ244×7.0 M-5.7

244

7:8

5.7

10383

5800

244

2371

6 5/8REG (З-152)
  или
  6 5/8 FH (З-171)

6 5/8REG (З-152)
  или
  7 5/8REG (З-177)

3LZ286×7.0 M-4

286

3:4

4

10240

5170

286

2600

6 5/8REG (З-152)
  или
  6 5/8 FH (З-171)

6 5/8REG (З-152)
  или
  7 5/8REG (З-177)


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