Preface |
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iii | |
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1 | (8) |
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1 | (1) |
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1.2 Rubber used in the field of oil and gas equipment |
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1 | (8) |
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1.2.1 Rubber sealing ring |
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2 | (1) |
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1.2.2 Metal-rubber sealing structure in roller cone bit |
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3 | (1) |
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1.2.3 Screw drill rubber lining |
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4 | (1) |
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1.2.4 Seal structure of the pump |
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5 | (1) |
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1.2.5 Wellhead blowout preventer |
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6 | (1) |
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6 | (1) |
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7 | (2) |
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2 A Rubber Experiment and the Constitutive Model |
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9 | (19) |
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2.1 Rubber's material properties |
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9 | (1) |
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2.2 Nonlinear characteristics |
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9 | (4) |
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2.2.1 Material nonlinearity |
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9 | (1) |
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2.2.2 Geometry nonlinearity |
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10 | (2) |
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2.2.3 Contact nonlinearity |
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12 | (1) |
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2.3 Rubber constitutive model |
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13 | (3) |
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2.3.1 The constitutive relation of rubber |
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13 | (1) |
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2.3.2 Structural model of synthetic rubber |
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14 | (1) |
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2.3.3 The constitutive model |
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15 | (1) |
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2.4 Single-axis stretching experiment |
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16 | (4) |
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16 | (1) |
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16 | (1) |
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2.4.2.1 Fatigue damage resistance |
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16 | (1) |
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2.4.2.2 Stress-strain curve |
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17 | (1) |
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18 | (2) |
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20 | (8) |
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2.5.1 Test materials and processes |
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20 | (1) |
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20 | (1) |
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2.5.1.2 Experiment process |
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21 | (1) |
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22 | (1) |
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2.5.2.1 Effect of speed on the friction coefficient |
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22 | (1) |
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2.5.2.2 Effect of sand content on friction coefficient and wear |
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23 | (2) |
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2.5.3 Surface morphology of rubber wear |
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25 | (1) |
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26 | (2) |
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3 Mechanical Behavior and Sealing Performance of the Rubber Sealing Rings |
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28 | (46) |
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3.1 Materials and methods |
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28 | (1) |
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29 | (15) |
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3.2.1 Tribology experiment |
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29 | (1) |
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3.2.2 Static sealing performance |
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30 | (1) |
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3.2.2.1 Sealing performance |
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30 | (1) |
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3.2.2.2 Effect of the fluid pressure |
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30 | (2) |
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3.2.2.3 Effect of the friction coefficient |
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32 | (1) |
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3.2.2.4 Effect of the compression ratio |
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33 | (2) |
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3.2.3 Dynamic sealing performance |
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35 | (1) |
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3.2.3.1 Sealing performance |
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35 | (1) |
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3.2.3.2 Effect of the fluid pressure |
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36 | (1) |
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3.2.3.3 Effect of the friction coefficient |
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37 | (3) |
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3.2.3.4 Effect of the compression ratio |
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40 | (1) |
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3.2.4 Bitten failure analysis |
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41 | (3) |
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44 | (6) |
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3.3.1 Sealing performance |
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44 | (2) |
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3.3.2 Effect of the compression amount |
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46 | (1) |
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3.3.3 Effect of the fluid pressure |
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47 | (1) |
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3.3.4 Effect of the rubber hardness |
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47 | (2) |
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3.3.5 Dynamic sealing performance |
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49 | (1) |
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50 | (9) |
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3.4.1 Static seal characteristics |
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50 | (1) |
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3.4.1.1 Effect of the compression amount |
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51 | (2) |
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3.4.1.2 Effect of the friction coefficient |
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53 | (1) |
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3.4.1.3 Effect of the fluid pressure |
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54 | (1) |
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3.4.1.4 Effect of the rubber hardness |
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54 | (1) |
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3.4.2 Improvement of the sealing ring section |
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54 | (2) |
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3.4.2.1 Performance of the static seal |
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56 | (2) |
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3.4.2.2 Performance of the reciprocating seal |
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58 | (1) |
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59 | (4) |
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3.5.1 Effect of the initial compression ratio |
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59 | (2) |
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3.5.2 Effect of the fluid pressure |
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61 | (1) |
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3.5.3 Effect of the friction coefficient |
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61 | (1) |
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3.5.4 Effect of the rubber hardness |
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62 | (1) |
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63 | (11) |
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63 | (1) |
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3.6.2 Static sealing performances |
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64 | (1) |
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3.6.2.1 Stress on the sealing ring |
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64 | (2) |
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3.6.2.2 Effect of the compression amount |
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66 | (1) |
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3.6.2.3 Effect of the friction coefficient |
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67 | (1) |
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3.6.2.4 Effect of the fluid pressure |
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68 | (1) |
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3.6.2.5 Effect of the rubber material |
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68 | (1) |
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3.6.3 Dynamic sealing performances |
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68 | (1) |
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3.6.3.1 Comparison with other sealing rings |
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68 | (2) |
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3.6.3.2 Effect of compression amount |
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70 | (1) |
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3.6.3.3 Effect of friction coefficient |
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70 | (2) |
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3.6.3.4 Effect of fluid pressure |
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72 | (1) |
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3.6.3.5 Effect of rubber hardness |
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72 | (1) |
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73 | (1) |
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4 Metal-rubber Sealing Structure in the Roller Cone Bit |
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74 | (21) |
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74 | (1) |
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75 | (1) |
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76 | (11) |
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4.3.1 Effect of the fluid pressure |
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76 | (1) |
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4.3.1.1 No fluid pressure |
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76 | (2) |
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78 | (3) |
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4.3.2 Effect of the compression ratio |
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81 | (1) |
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4.3.3 Effect of fluid pressure |
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82 | (1) |
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4.3.4 Effect of the inclination angle |
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83 | (1) |
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4.3.5 Effect of the ambient temperature |
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84 | (3) |
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87 | (7) |
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4.4.1 Sealing performance |
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87 | (1) |
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4.4.2 Effect of the compression ratio |
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88 | (2) |
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4.4.3 Effect of the fluid pressure |
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90 | (1) |
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4.4.4 Effect of the ambient temperature |
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91 | (1) |
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4.4.5 Effect of the friction coefficient |
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92 | (2) |
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94 | (1) |
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94 | (1) |
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5 Stator Rubber of the Positive Displacement Motor (PDM) |
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95 | (26) |
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5.1 Failure analysis of power section assembly |
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96 | (3) |
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96 | (1) |
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5.1.2 Failure analysis and improvement measures |
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97 | (2) |
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5.2 Rubber lining of the PDM |
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99 | (1) |
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5.3 Heat source analysis and the heat generation mathematical model |
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100 | (1) |
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5.3.1 Mathematical model of heat generation in rubber bushing |
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100 | (1) |
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5.3.2 Heat conduction differential equation |
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101 | (1) |
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101 | (1) |
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5.4 Thermal mechanical coupling effect |
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101 | (10) |
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5.4.1 Uniform temperature field analysis |
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101 | (2) |
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5.4.2 Non-uniform temperature field analysis |
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103 | (3) |
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5.4.3 Factors influencing the temperature rise |
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106 | (1) |
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5.4.3.1 Effect of the hydrostatic pressure |
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107 | (1) |
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5.4.3.2 Effect of the rotor speed |
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107 | (1) |
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5.4.3.3 Effect of the rubber hardness |
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108 | (1) |
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5.4.3.4 Effect of the Poisson's ratio |
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109 | (1) |
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5.4.3.5 Effect of the strata temperature |
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109 | (1) |
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5.4.3.6 Effect of the differential pressure |
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109 | (2) |
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5.5 Mechanical behavior without heat effect |
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111 | (9) |
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5.5.1 Stress and strain on the rubber lining |
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111 | (2) |
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5.5.2 Effect of the drilling fluid pressure |
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113 | (1) |
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5.5.3 Effect of the rubber hardness |
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114 | (1) |
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5.5.4 Effect of the downhole temperature |
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115 | (2) |
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5.5.5 Effect of the pressure difference |
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117 | (3) |
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120 | (1) |
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120 | (1) |
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6 Sealing Structure of the Pump |
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121 | (20) |
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121 | (1) |
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121 | (1) |
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121 | (1) |
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6.2 The plunger seal of the fracturing pump |
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122 | (7) |
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122 | (1) |
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6.2.2 Structural parameters of the non-sealing ring |
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123 | (1) |
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6.2.2.1 Effect of the support ring angle |
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123 | (1) |
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6.2.2.2 Effect of the pressure ring angle |
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124 | (1) |
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6.2.2.3 Effect of the friction coefficient |
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125 | (1) |
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6.2.3 Structural parameters of the sealing ring |
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126 | (1) |
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6.2.3.1 Effect of the lip angle |
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126 | (1) |
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6.2.3.2 Effect of the sealing surface length |
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127 | (1) |
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6.2.3.3 Effect of the interference of sealing ring |
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128 | (1) |
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6.2.3.4 Effect of the sealing ring number |
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129 | (1) |
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6.3 Plunger seal of mud pump |
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129 | (12) |
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129 | (2) |
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6.3.2 Force of mud pump piston |
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131 | (1) |
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6.3.3 Factors influencing the piston's performance |
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131 | (1) |
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6.3.3.1 Effect of the working load |
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131 | (1) |
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6.3.3.2 Effect of the friction coefficient |
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132 | (1) |
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6.3.3.3 Effect of the inner wall width |
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133 | (2) |
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6.3.3.4 Effect of the interference |
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135 | (1) |
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6.3.3.5 Effect of the thickness |
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136 | (1) |
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6.3.4 Improvement of the rubber cup |
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137 | (3) |
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140 | (1) |
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7 Wellhead Blowout Preventer |
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141 | (20) |
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141 | (2) |
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141 | (1) |
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7.1.1.1 Semi-enclosed ram BOP |
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141 | (1) |
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141 | (1) |
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142 | (1) |
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143 | (7) |
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7.2.1 Finite element model |
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143 | (1) |
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7.2.2 Results and discussions |
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144 | (1) |
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7.2.2.1 Effect of the load |
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144 | (1) |
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7.2.2.2 Effect of the inner radius of the rubber core |
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144 | (2) |
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7.2.2.3 Effect of the rubber core's height |
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146 | (2) |
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7.2.3 Erosion of the BOP's ram's rubber |
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148 | (2) |
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150 | (5) |
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7.3.1 Finite element model |
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150 | (1) |
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7.3.2 Results and discussions |
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150 | (1) |
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7.3.2.1 Floating bottom seal structure |
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150 | (5) |
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7.3.2.2 Chamfer of the lower ram |
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155 | (1) |
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155 | (6) |
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7.4.1 Numerical calculation model |
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155 | (1) |
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7.4.2 Results and discussions |
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156 | (1) |
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7.4.2.1 Effect of the well fluid pressure |
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156 | (1) |
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7.4.2.2 Effect of the friction coefficient |
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157 | (1) |
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7.4.2.3 Effect of length of the main sealing surface |
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158 | (1) |
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7.4.2.4 Effect of the outer cone angle |
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159 | (1) |
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160 | (1) |
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161 | (16) |
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161 | (1) |
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161 | (10) |
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8.2.1 Finite element model |
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161 | (2) |
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8.2.2 Effect of structural parameters |
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163 | (1) |
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8.2.2.1 Rubber cylinder height |
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163 | (1) |
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8.2.2.2 End face of the rubber cylinder |
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164 | (1) |
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8.2.2.3 Rubber cylinder sub-thickness |
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165 | (1) |
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8.2.2.4 Spacer ring diameter at both ends of the rubber cylinder |
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166 | (2) |
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8.2.2.5 The friction coefficient |
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168 | (1) |
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169 | (2) |
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171 | (6) |
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8.3.1 Finite element model |
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171 | (1) |
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8.3.2 Effect of structural parameters |
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172 | (1) |
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8.3.2.1 Inclination of the rubber tube shoulder |
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172 | (1) |
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173 | (1) |
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174 | (1) |
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8.3.3 Effect of other parameters |
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174 | (1) |
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8.3.3.1 Chamfering of the rubber cylinder seat |
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174 | (1) |
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8.3.3.2 Gap between the rubber tube and the casing |
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175 | (1) |
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176 | (1) |
Index |
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177 | |