Real-Time Coiled Tubing Monitoring System Ensures Integrity of 19,521-ft String

Published: 08/28/2014

Concrete blue texture
 
Graphic: Real-Time Coiled Tubing Monitoring System Ensures Integrity of 19,521-ft String - Magnetic flux leakage measurements reveal tubing condition, enabling operator to extend CT life
The CoilScan system allowed the string to be run for an additional 86,942 ft [26,500 m] with the total number of running meters at the time of retirement at 369,094 ft [112,500 m]. The measurements acquired by the CoilScan system provided confidence in CT integrity and allowed necessary precautions to be taken while in the ballooned section, resulting in three additional runs to complete the campaign.
Location
Canada, North America
Details

Alberta, Canada
Kaybob Field

Lithology
Shale
 
Reservoir
Duvernay
 
Temperature
233.6 degF [112 degC]
 
Pressure
8,847 psi [61 MPa]
 
CT length
19,029 ft [5,800 m
 
Well depth
19,521 ft [5,950 m]
 
Completion size
4.5 in [114.3 mm]
 
CT string size
2.375 in [60.3 mm]

Background
A CT string used for high-pressure milling operations (8,847 psi [61 MPa]) with over  282,152 ft [86,000 m] of downward running footage had a region of OD growth (ballooning) at approximately 9,842–11,482 ft [3,000–3,500 m]. The CT string was midcampaign with limited availability of a replacement. The CoilScan* real-time CT pipe inspection system was deployed to capture real-time magnetic flux leakage measurements of the string. Ballooning was measured to be within acceptable limits of 3.5% and no additional sections contained severe defects or ovality.
Products Used