Combined free-point indicator and backoff system lets you recover more pipe more effectively
The FPIT free-point indictator tool with combined backoff shot determines the free point in stuck drillpipe, drill collars, tubing, or casing and then provides the force that frees the stuck assembly. The FPIT tool provides accurate information about the stuck assembly, saving you both time and money because you can make immediate and informed decisions.
During the course of drilling or workover, the work string can become stuck in the borehole for many reasons: hole conditions, formation characteristics, mud properties, mechanical problems, assembly tools, or operational error. Saving the well and reducing expense means freeing the stuck assemblies quickly and efficiently.
The FPIT tool determines how much of the stuck assembly may be freed. In combination with a backoff shot, the FPIT tool efficiently frees the stuck section of the assembly by applying an explosive shock inside a tool joint to which left-hand torque has been applied. Up to seven strands of Primacord detonating cord can be used for the combined operation’s explosive load.
FPIT measurements
Correctly choosing the backoff depth is a crucial part of the pipe recovery operation. The FPIT tool consists of a sensor section between two anchors. The sensor package includes two sensors. One sensor detects stretch and is unaffected by torque; the other detects torque.
Independent and sequential torque and stretch measurements result in accurate free point determination. With the measurements from both the sensors in observed in real time, the application of stretch and torque is effectively guided to give the best chance for a successful backoff on the first attempt.
Full integration
Control of the FPIT tool is customized from a surface unit that integrates the driller’s parameters with the measurements acquired during tool operational sequences. The percentage of the free torque and stretch is automatically computed at each measurement point and displayed on the surface.
The operation is digitally recorded and can be monitored in the wireline surface unit. InterACT connectivity, collaboration, and information services can also be used for remote monitoring at the operator’s offices.
Benefits
- Timely, efficient operations
- Effective operation from drillships and semisubmersibles and in highly deviated wells
- Comprehensive yet simple presentation of log data
- Improved pipe recovery decision making
- Flexibility in operation and measurements
- Measurement in almost all mechanical conditions
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