The “Pressure” Module allows the calculation of three different pipe setups being:
and four different fluid models:
- Friction, hydrostatic and Injection pressures in “Pipes”
- Friction, hydrostatic and Injection pressures in an “Annular” conduit
- The pumping and circulation pressures when pumping a fluid through a pipe and then up the annulus between this pipe and another pipe or open hole.
- Newtonian Model
- Bingham Plastic Model
- Power Law Model
- Herschel Bulkley Model
The below steps demonstrates the data sequence for any of the above calculations:
Note : For "Annulus" and "Circulation" calculation, enter first the depths for the Outer Pipe/Hole section followed by the Inner Pipe/Hole depths
- The combination of pipe setup and fluid model are selected through the segment-controls (1)
- Then, the OD, ID, wall thickness and weight of the selected pipe can be accessed by tapping on the “Select Pipe” button (2). (please refer to “Section Selection” section of this manual).
- Enter the depths (3) against each section. These depths represent the depth of the bottom of this section and NOT the length of it.
- We can add to the string a jetting nozzle by entering its TFA in (4). The module will compute the pressure drop across the nozzle based on the fluid property and the TFA and assuming a Cd = 0.95.
- The fluids properties are entered in (5) (This section’s textfields will vary depending on the fluid model selected in (1)).
- The pumping rate used to compute the friction pressures and pressure drop across the nozzle is entered in the same section (5).
- Also, In the case of “Pipe” and “Annulus” calculation, we can calculate the injection pressure into a formation of reservoir pressure Pr, permeability k, height h and well radius r. The formation data is entered in section (6).
- When the “Annulus” calculation is selected, the nozzle pressure drop calculation is not available.
- Similarly, when the “Circulation” calculation is selected, the formation injection pressure option is not available.