Marine Technology Reporter Blogs - casing

The definition of MPD recently adopted by the IADC Underbalanced Operations and Managed Pressure Committee states that: “Managed Pressure Drilling (MPD) is an adaptive drilling process used to precisely control the annular pressure profile throughout the wellbore. According to drilling specialists, bottomhole pressure is normally maintained above pore pressure by controlling the density of the drilling fluid. When density gets too high, the formation begins to absorb the fluid and the fluid density needs to be adjusted. Casing must be run to isolate the open hole before drilling can continue. The common objective of all currently known managed pressure drilling techniques is to stretch or eliminate casing points to allow drilling beyond conventional limits of depth or pressure variation.

Helix Energy Solutions has a different concept for using an ROV in conjunction with a subsea coring and sampling rig. Helix’s system, the ROVdrill Mk. 2 actually places the ROV and the rig together inside a cage. Both the Forum Rovdrill and Helix’s ROVdrill MK. 2 are capable of deepwater operations and have their advantages and disadvantages. In this post we’ll take a look at the Helix ROVdrill MK. 2 capabilities. Helix Energy Solutions Group, Inc.’s robotics subsidiary, Canyon Offshore Limited (U.K.), which has an extensive fleet of proven trenching equipment and ROVs, also commercializes the ROVdrill Mk.2 systems. Canyon Offshore’s…

Completion systems are the components necessary to complete a well after it is drilled and prepare it for production. There are a variety of completion options available to oil and gas operators. Cased-hole completion systems, for example, vary from relatively simple single-zone low-pressure/low-temperature (LP/LT) designs to complex high-pressure/high-temperature (HP/HT) applications that are commonly found in deepwater. Cased-hole completion involves running casing or a liner down through the production zone, and cementing it in place. A good cement job is the primary barrier for effective zonal isolation and is the standard industry method to protect the wellbore from unwanted and dangerous influxes of formation fluids, solids and gases.