Performance Drilling Optimization

Abstract

The use of a newly-designed bottomhole assembly in the Kuparuk River Field on Alaska's North Slope has proven to be a cost-effective improvement over traditional rotary drilling methods. The bottomhole assembly consists of a polycrystalline diamond compact bit, a positive-displacement downhole motor with specially-designed tilted drive sub (called a navigation sub), and a measurement while drilling system. The use of these tools in combination allows the driller to constantly monitor the well path and either drill straight ahead or make necessary course corrections, while drilling continues uninterrupted. The savings from such a system have proven to be substantial, with significant reductions in drilling time, increases in rate of penetration, and average savings to the operating company of over $50,000 per well.

Applicability of petroleum horizontal drilling technology to hazardous waste site characterization and remediation

“…The calculation of the rate of build uses three point geometry. Figure 5 shows this information and the method for calculation of the angle build characteristics of the bent sub-motor assembly (Karlsson 1985). Surveys are run periodically to , determine azimuth coordinates and amount of deflection.…”

A New Bottom-Hole Assembly Design Method to Maintain Verticality and Reduce Lateral Vibration

“…The key to successful anti-deviation drilling is the reasonable design of the drilling BHA structure according to the characteristics of the formation. For this reason, some theories have been proposed to evaluate the anti-deviation ability of the drilling BHA, including the three-point circle method [4,5], limiting curvature method [6], and balance trend method [7,8]. The three-point circle method estimates the build rate of the BHA based on geometric relationships.…”