Drilling operations in waters deeper than 3,000 ft are increasing throughout the world, and the industry is considering the challenges imposed by ultradeep waters. Leases have been obtained in water depths up to 10,000 ft, with the requirement that they be drilled within the next decade. Use of current technology to drill these leases will require extremely large floating drilling units and large-diameter marine-riser systems.Continue reading “DUAL-DENSITY MUD SYSTEM FOR DEEPWATER DRILLING OPERATIONS”
Mud is circulated through a wellbore to bring the cuttings to the surface. Here cuttings are separated out so that clean mud can be reinserted into the well.
Nine distinct mud systems are defined here. The first seven are water-based, while the eighth is oil-based. The ninth category is a specialized one in which air or gas is the continuous fluid. The 9 categories are:
Cuttings injection system is used to inject particles into the mud system before test section stream flow. Two control valves as shown in Figure 1 were used to separate the injection system from main flow line.