SUBSURFACE MEASUREMENT APPARATUS, SYSTEM, AND PROCESS FOR IMPROVED WELL DRILLING, CONTROL, AND PRODUCTION

摘要

Subsurface wellbore conditions are measured directly in the wellbore while the fluid circulation system is not pumping. The measured values are recorded at the subsurface location and subsequently transmitted to the well surface when circulation is resumed using pulse telemetry (FPT). Axially spaced measurements are used to obtain differential values. The apparatus (10) includes an assembly having axially spaced inflatable packers (13, 14) that are used to isolate an uncased section of the wellbore (23). The apparatus has self-contained measuring and recording equipment, a fluid receiving reservoir, circulating valving, measurement while drilling equipment (24), and automated controls. The method is used to directly measure and evaluate conditions including those caused by pumping and drill string movement.