Baker Hughes has commercially released its EasyReach extended-reach coiled tubing (CT) service. The company developed the service in response to the growing number of long horizontal wells and the need to be able to service them confidently using CT.
Comprising advanced simulation software, a lubricant specifically designed for downhole conditions and a field-proven fluid hammer tool, the service can help increase the lateral reach of CT beyond the limits of conventional CT systems. This holistic approach helps to reduce risk and improve well economics while enabling operators to reach total depth (TD) in extended-reach laterals.
The EasyReach service provides more predictable performance during cleanouts, acidizing, stimulations and other applications in long horizontal wells. The proprietary CIRCA modeling software is a key component in how the company designs and executes the service. With this advanced modeling tool, Baker Hughes can deliver a solution to address a well’s unique profile and challenges, using the hammer tool, lubricant, or both.
The EasyReach hammer tool periodically interrupts fluid flow to vibrate the tool and generate traction forces to pull the tubing deeper into the well. These periodic pulses also reduce friction and delay the onset of helical buckling and lockup. The EasyReach lubricant is engineered to provide more consistent performance in extreme environments, including high-pressure/high-temperature (HP/HT). It helps to reduce mechanical friction with improved sliding efficiency and higher rates of penetration.
The new lubricant’s performance has been confirmed in a series of field trials. In a recent operation in a horizontal monobore with 5½-in. casing and a lateral length of approximately 5,100 ft, the lubricant delivered a coefficient of friction of 0.13 in the wellbore (significantly reduced from the default value of 0.24 when no lubricant is used and from coefficients of friction in the range of 0.17 to 0.19 for other commercially available lubricants) closely matching the lab test data. This enabled CT to reach TD with enough available weight to activate the deployment packer and complete the job.
Based on the service’s performance in this well, combining the lubricant with the fluid hammer tool would have permitted the operator to perform the desired application in a lateral more than 13,000 ft, or more than twice the length of the existing lateral.