Coiled tubing’s applications have expanded to the point where this service category has become essential to the oil and natural gas industry. Calfrac’s fleet of coiled tubing equipment provides services from shallow through deep (below 3,000 metres true vertical depth, with reel capacities up to 6,000 metres) and covers the large majority of today’s wells including long-leg multi-stage fractured horizontals drilled in deep shales and tight sands.
Conventional coiled tubing units are often used together with support equipment to pump nitrogen or acid into wells in order to remove solids and fluids from the wellbore. Coiled tubing units are also used to:
- Set and remove tools;
- Perforate the wellbore;
- Remove foreign material or damaged tools through “fishing” operations;
- Perform well abandonment; and
- Set siphon or velocity strings.
Calfrac has developed innovative equipment and treating procedures required to effectively complete coiled tubing assignments. These range from relatively simple shallow natural gas operations to unconventional deep natural gas and light oil projects. Successful coiled tubing operations depend on the quality of the people running the equipment. Calfrac’s people have proved their ability to deliver success.
Using coiled tubing equipment is a quick, cost-effective and efficient approach for stimulating zones not requiring extremely high pressures or enormous proppant volume. Coiled tubing is highly effective when applied to shallower multi-zone vertical well completions, such as Medicine Hat Formation natural gas, as well as some horizontal well completions, such as Bakken oil in its shallower occurrences. This methodology includes perforating and then fracturing the horizontal leg using straddle packers mounted on larger-diameter coiled tubing. Calfrac is highly experienced at frac-through-coil.