There are many reasons why in-situ machining of wellhead components is required. They normally fall into one of three categories: it could be part of a preventative maintenance programme, when corrective action is needed, or if recovering the wellhead as part of a decommissioning project.
Valves and actuators used in a wellhead Christmas tree can fail through seizure and breakage, often caused by a lack of suitable lubrication and long periods of non-operation. Additionally, corrosion and erosion problems arise over a period of time, with hydrocarbons causing issues inside the valves and external components being either sand blasted by the wind, or exposed to corrosive salt-water.
So what portable machining equipment is available to help the on-site team commissioned to solve these problems?
Below, we’ve listed 9 essential machines we think every wellhead engineer should know about.