Well intervention and completion services - Well intervention and completion services utilize coiled tubing for efficient downhole operations such as cleaning, logging, and scale removal. These services reduce rig time, improve well productivity, and extend the life of existing wells.
Well intervention and completion services are the critical activities performed to maintain, restore, or enhance a well’s productivity after the initial drilling phase, and to install the downhole equipment necessary for production. Coiled tubing has fundamentally transformed this service sector by enabling rigless, live-well operations. Traditionally, these tasks required mobilizing a large, expensive workover rig, killing the well (shutting off production), and running jointed pipe, leading to significant downtime.
Coiled tubing units now allow operators to perform a vast range of interventions without removing the production tubing string. In completion services, CT is used to set plugs, run velocity strings, or perform selective perforating after the main completion equipment is installed. In intervention services, CT is indispensable for matrix and fracture stimulation (acidizing), fishing for lost tools, and circulating out fill (sand, scale, paraffin) that restricts flow. The shift to CT has resulted in a qualitative improvement in operational flexibility and speed. For example, a multi-day workover job can be reduced to a matter of hours or a day with a CT unit, dramatically increasing the economic viability of maintaining mature and marginal wells. This technological shift is entirely responsible for the industry's ability to maintain higher production uptime and cost-effectively manage complex wellbore challenges.
FAQs on Well intervention and completion services
Q: What is the primary economic benefit of using coiled tubing in well intervention compared to traditional methods?
A: The ability to perform interventions without mobilizing a large workover rig and without killing the well, leading to a massive reduction in operational time and cost.
Q: In the context of well completions, what is a key task performed by coiled tubing after the main completion string is installed?
A: Key completion tasks include running velocity strings, setting or retrieving isolation plugs, and performing targeted selective perforations.
Q: How does coiled tubing contribute to mitigating flow assurance problems like sand or scale buildup?
A: CT provides the means to circulate specialized cleaning fluids, acids, or solvents to the specific downhole location where the flow restriction is occurring.
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