Schlumberger

Technical Paper: Implementation of a Shock and Vibration Mitigation Process: Achieving Real-Time Solutions and Savings

Society: SPE
Paper Number: 107903
Presentation Date: 2009
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Abstract

Worldwide, the costs associated with the exploration and production of oil have increased almost exponentially in the past 5 years. This sharp rise in daily costs has also led to a new urgency from operators to find more-reliable and -efficient ways of doing business.

Shock and vibration (S&V) are the leading causes of failure for measurement-while-drilling (MWD) and rotary-steerable systems today. These failures have a major impact on operators and service companies, costing millions of dollars in repairs and hours of rig time.

To better understand downhole dynamics, a wide variety of service companies now offer lateral, axial, and transverse-shock measurements, along with downhole rev/min (RPM) readings. In the best case, these measurements offer a reactive method of drilling, and in the worst case, they provide no help in solving the problem or in preventing damage to the bottomhole assembly (BHA).

For S&V measurements to be effective, operators and service companies must work together to create a comprehensive process that includes each phase of drilling--planning, execution, and evaluation. An S&V standard combined with increased client awareness and education has allowed a new level of success to be achieved at the rigsite. Now, S&V issues at the rig can be identified in real time and monitored remotely from an operations-support center. This communication structure, coupled with prejob planning and modeling and the capture of post-run lessons learned, can be used to offer solutions when problems arise, thereby preventing damage to the BHA, reducing rig non-productive time (NPT), and improving the rate of penetration (ROP).