Schlumberger

Technical Paper: Planning for Successful Jarring Operations - Effective Use of Drilling Impact Systems Helps Release Stuck Pipe

Society: SPE
Paper Number: 159223
Presentation Date: 2012
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Abstract

Jarring is a cost effective alternative to free stuck pipe.  Impact tools have been used in drilling industry for many decades and the technology has helped operators save significant amounts of time and money.  To keep improving this technology, a new Drilling Impact System (DIS) has been developed. The DIS uses innovative double-acting hydraulic Drilling Jar/Drilling Accelerator and BHA analysis software. The unique modeling program enables engineers to identify/recognize the optimum impact/impulse values and key operational considerations during the BHA design process. The optimized BHA with accelerator amplifies the energy created by the drilling jar. As a consequence, it increases the probability of freeing a stuck BHA. 

This paper will focus on the drilling bottom hole assembly (BHA) design process and best operational practices to ensure a successful drilling operation. The author will discuss effectiveness of the impact system and proper pre-job analysis procedures for optimum jar placement to avoid lost-in-hole (LIH) situations. The planning process includes: 1) operational considerations; 2) QA/QC system and; 3) software analysis. Case studies are presented to illustrate how the utilization of the drilling impact system culminated in the successful execution of a jarring operation to free stuck bottom hole assemblies.

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