Conversion Factors

(newton-

meters)

Kilowatt Hours

Kilogram Calories

Kilogram Metres

Footpounds

Horsepower Hours (metric)

Horsepower Hours (British)

British Thermal Units

1 joule (newton-metre)

1

277.8 x 1Ö6

238.9 x 106

102 x103

737.6 x 10"

377.7 x 10"9

372.5 x 10s

948 x 10h

1 kilowatt Hour

3.6 x 103

1

0.860

367.1

2.655 x 103

1.36 x 10"3

1.341x 10"

3.413

1 kilogram calorie

4.187 x 103

1.163

1

426.9

3.087 x 103

1.581 x 10 '

1.559 x 10 3

3.968

1 kilogram metre

9.807

2.724 x 10 3

2.343 x 10'3

7.233

3.704 x 106

3 653 x 106

9.297 x 10 J

1 footpound

1.356

376.6 x 10 6

323.9 x 106

138.3 x 10 J

1

512.1 x 10 9

505.1 x 10:

1.285 x 10 3

1 Horsepower hour (metric)

2.848 x 10e

735.5

632.5

270 x t03

1.953 x 106

1

986.3 x 103

2.51 x 10-

1 Horsepower hour (British)

2.685 x 10s

745.7

641.3

273.7 x 103

1.98 x 106

1.014

1

2.545 x 103

1 British thermal unit

1.055 x 101

293 X 10"3

252 x 10 3

107.6

778

398.4 x 10*

392.9 x 10 6

1

NOTE: 1) Conversion factors based on g = 9.807 m/s? = 32.174 ft/s"

  1. Pound signifies pound (avdp)
  2. Kilogram calorie signifies "mean kilogram calorie"
  3. British thermal unit signifies "moan British thermal unit"

MUD DENSITY, GRADIENT AND BUOYANCY FACTOR

NOTE: Buoyancy factor is for STEEL only!

Mud density

Gradient

Buoyancy factor

Mud density

Gradiert

Buoyancy factor

kg/m3

lb/gall

lb/ft3

psi/ft

kPa/m

kg/m3

lb/gall

lb/ft3

psi/ft

kPa/rrt

1000

8.3

62.4

0.433

9.807

0.873

1800

15.0

112

0.780

17.652

0.772

1010

8.4

63.1

0.438

9.905

0.872

1820

15.2

114

0.789

17.849

0.770

1030

8.6

64.3

0.447

10.101

0.869

1850

15.4

116

0.802

18.143

0.765

1060

8.8

66.2

0.460

10.400

0.865

1870

15.6

117

0.810

18.339

0.763

1080

9.0

67.4

0.468

10.592

0.863

1890

15.8

118

0.819

18.535

0.760

1100

9.2

68.7

0.477

10.788

0.860

1920

16.0

120

0.832

18.829

0.756

1130

9.4

70.6

0.490

11.278

0 857

1940

16.2

121

0.841

19.026

0.754

1150

9.6

71.8

0.499

11.288

0.854

1970

16.4

123

0.854

19.320

0.750

1160

9.7

72.4

0.503

11.376

0.853

1990

16.6

124

0.863

19.516

0.747

1180

9.8

73.7

0.512

11.572

0.850

2010

16.8

126

0.871

19.712

0.745

1200

10.0

74.9

0.520

11.768

0.848

2040

17.0

127

0.884

20.006

0.741

1220

10.2

76.2

0.529

11.965

0.845

2060

17.2

129

0.893

20.202

0.739

1250

10.4

78.1

0.542

12.259

0.841

2090

17.4

131

0.906

20.500

0.735

1270

10.6

79.3

0.551

12.455

0.838

2110

17.6

132

0.915

20.693

0.732

1290

10.8

80.6

0.560

12.651

0.836

2130

17.8

133

0.923

20.889

0.730

1320

11.0

82.4

0.572

12.945

0.832

2160

18.0

135

0.936

21.183

0.726

1340

11.2

83.7

0.581

13.141

0.830

2180

1B.2

136

0.945

21.379

0.723

1370

11.4

85.6

0.594

13.436

0.826

2210

18.4

138

0.958

21.673

0.720

1390

11.6

86.8

0.603

13.631

0.824

2230

18.6

139

0.967

21.870

0.717

1410

11.8

88.1

0.611

13.828

0.821

2250

18.8

141

0.975

22.066

0.714

1440

12.0

89.9

0.624

14.122

0.817

2280

19.0

142

0.988

22.360

0.711

1460

12.2

91.2

0.633

14.318

0.815

2300

19.2

144

0.997

22.556

0.708

1490

12.4

93.0

0.646

14.612

0.811

2330

19.4

146

1.010

22.850

0.704

1510

12.6

94.3

0.655

14.809

0.808

2350

19.6

147

1.019

23.046

0.702

1530

12.8

95.5

0.663

15.005

0.806

2370

19.8

148

1.027

23.242

0.699

1560

13.0

97.4

0.676

15.299

0.802

2400

20 0

150

1.040

23.537

0.697

1580

13.2

98.7

0.685

15.495

0.799

2420

20.2

151

1.049

23.733

0.693

1610

13.4

101

0.698

15.789

0.796

2450

20.4

153

1.062

24.027

0.689

1630

13.6

102

0.707

15.985

0.793

2470

20.6

154

1.071

24.223

0.686

1650

13.8

103

0 715

16.182

0.791

2490

20.8

155

1.079

24.419

0.684

1680

14.0

105

0.728

16.476

0.787

2520

21.0

157

1.092

24.714

0.680

1700

14.2

106

0.737

16.672

0.784

2540

21.2

159

1.101

24.910

0.678

1730

14.4

108

0.745

16.966

0.780

2570

21.4

160

1.114

25.204

0.674

1750

14.6

109

0.759

17.162

0.778

2590

21.6

162

1.123

25.400

0.671

1770

14.8

111

0.767

17.358

0.775

2610

21.8

163

1.131

25.596

0.669

STEEL : 3.412 psi/ft or 7.85 kg/m3 ( 489.58 lbs/ft3 )

BUOYANCY FACTOR = 1" mud density steel density

CONVERSION FACTORS FOR PRESSURE GRADIENTS, FLUID DENSITY AND PRESSURE

To convert from

To

Multiply by

psi/ft

kPa/m

22.62059

bar/10m

2.26206

lb/gal (US)

19.25*

lb/ft3

144.0*

kg/dm3

2.307*

bar/10m

kPa/m

10.0

psi/ft

0.442075

lb/gal (US)

8,51*

lb/ft3

63.66*

kg/dm3

1.020*

kPa/m

bar/10m

0.10

psi/ft

0.0442075

lb/gal (US)

0.851*

lb/ft3

6.366*

kg/dm3

0.1020*

lb/gal(US)

kPa/m

1.175*

bar/10m

0.1175*

psi/ft

0.0519*

lb/ft3

7.480519

kg/dm3

0.1198264

lb/ft3

kPa/m

0.1571*

bar/10m

0.01571*

psi/ft

0.00694*

lb/gal (US)

0.1336897

kg/dm:i

0.01601846

kg/dm3

kPa/m

9.807*

bar/10m

0,9807*

psi/ft

0.4335*

lb/gal (US)

8.34540

lb/fta

62.4280

NOTES: * There is no direct conversion between densities and pressure gradients.

The relationship P = pgh has been used to obtain multiplication factors indicated by '"'.

The SI units of pressure gradient are kPa/m The SI units of density are kg/m3

In this book we assume that one litre water at 4 °C and 1 Atm.(=101.3 kPa=14.7 psi) equals one dm 3water at 4 2C and 1 Atm. although we know this is not exactly Ihe same . (the difference between them is less then 0.003%) We take this liberty because it helps simplifying our calculations.

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Responses

  • lena
    What is the corrision factor for 16.3 ppg mud?
    7 months ago
  • battista
    What is 12.6 ppg to psi?
    14 days ago

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