How it works

Land drilling typically involves a mobile rig to drill a stepped and cased hole to production depth. A wellhead is installed to support the casing strings and contain pressure of the annulus between the casing strings.

Drilling depth can range from quite shallow, requiring few strings and a small truck rig, to depths of over 20,000 feet, requiring many casing strings and large rigs.

Typically, deeper wells will also require equipment suited for high pressures and temperatures.

Wells are completed with a tubing string run to production depth and supported at the wellhead by a tubing hanger. The production zone is isolated and the casing perforated.

An arrangement of valves, known as a tree, is installed above the tubing hanger to control the production flow.

In recent years, coil-tubing drilling, steam-assist production and mutli-well pad drilling have gained popularity. These are specialty versions of the same drilling process.

Features & Benefits

  • Advanced designs, such as multi-bowl or QCS wellheads, enable a more efficient drilling operations resulting in significant time savings and safety advantages

  • Proven global experience in all well depths, pressure and temperature conditions