Operations Manual
D-Tech Total Flow Area (TFA) The D-Tech Rotary Steerable tool is designed to operate at a predefined pressure drop dependent on tool size. This is a vital part of the functionality of the D-Tech tool and a 10% change in TFA can have as much as a 25% change in the force of the pistons. The pressure drop is achieved by setting the bit TFA to a calculated value. Depending on tool size, the target TFA pressure drop will be 500 or 600 psi. This allows the steering body pistons to generate the necessary force to steer the well path, alternatively an internal flow restrictor may be added to provide an additional internal pressure drop. D-Tech RST Components The D-Tech Rotary Steerable tool has three main external components (collar, stabilizer, and steering body) and three main internal components (control unit chassis, turbine/generator assembly, and motor valve assembly) see Figure 1.
Figure 1
OPS-FIELD-001 | Rev. H
dtechdrilling.com | 11
Made with FlippingBook Digital Publishing Software