A Special Mast For Every Drilling Rig
Land rigs, mobile rigs, and offshore rigs generally require different types of masts. We manufacture all major types to API 4F and always match them with the most suitable substructure [link].
The following describes the benefits and limitations of our most common masts and derricks:
The cantilever mast , also called k-type mast, is a robust construction that does not need to be supported by guylines. Assembled on the ground, the mast is raised as a single unit using the power of the drawworks. Its stability and fast installation make the cantilever type mast the preferred choice for our land drilling rigs, including fast moving rigs.
A telescope mast is comprised of several sections that can be extended and retracted. During rig up, each section is extended one by one by means of hydraulic cylinders and secured with guylines.
Due to its compact design, the telescope mast is typically used on a truck-mounted drilling rig, or well-servicing rig, mounted onto the carrier.
The tower type mast or derrick is a very robust construction that provides ample room for the derrickman. However, the piece-by-piece installation is inconvenient and dangerous, as it involves assembly operations high above the ground.
This is why the derrick nowadays is only used on offshore drilling platforms.