Category

Drilling Engineering

235 items

Difference in pressure gradient between the cement and mud

2.52

Differential hydrostatic pressure between cement in the annulus and mud inside the casing

2.53

Dilution of a mud system

2.54

Direction of dip

2.55

Directional curvature for a deviated well

2.56

Downward force or weight of casing

2.57

Drill pipe or drill collar capacity

2.58

Drill pipe or drill collar displacement and weight

2.59

Drill string design – Drill pipe length for bottomhole assembly

2.60

Drilled gas entry rate

2.61

Drilling cost per foot

2.62

Drilling ton miles – Coring operation ton miles

2.63

Drilling ton miles – Drilling/connection ton miles

2.64

Drilling ton miles – Round trip ton miles

2.65

Drilling ton miles – While making short trip ton miles

2.66

Drilling ton miles – Setting casing ton miles

2.67

Duplex pump factor

2.68

Duplex pump output – Using liner diameter

2.69

Duplex pump output – Using rod diameter

2.70

Duplex pump output by using liner and rod diameters

2.71

Dynamically coupled linear flow – Formation invasion

2.72

Effective weight during drilling

2.73

Effective wellbore radius for finite-conductivity fractures

2.74

Effective wellbore radius in infinite-conductivity fractures

2.75

Efficiency of block and tackle system

2.76

Equivalent area of pipe subject to uniform axial force

2.77

Equivalent circulating density

2.78

Equivalent density of a wellbore fluid

2.79

Equivalent formation water resistivity from SP log

2.80

Equivalent mud weight – Deviated well

2.81

Equivalent mud weight – Vertical well

2.82

Evaluation of centrifuge

2.83

Evaluation of hydrocyclone

2.84

Fluid volume required to spot a plug

2.85

Force applied to stretch material

2.86

Force exerted by the fluid on the solid surface of flow through an annulus

2.87

Friction factor in drill pipe

2.88

Front displacement of a particle in the reservoir – Formation invasion

2.89

Gas migration velocity

2.90

Gas solubility in a mud system

2.91

Gas/mud ratio

2.92

Gel strength – Optimal solid removal efficiency

2.93

Gel strength – Solid control efficiency

2.94

Gel strength – Solids build-up in system

2.95

Height of cement in the annulus

2.96

Hydraulic horsepower

2.97

Hydraulics analysis

2.98

Hydromechanical specific energy

2.99

Hydrostatic pulling

2.100

Hydrostatic pulling wet pipe out of the hole

2.101