Drilling Services Products

28 May 2019 21:53

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A managed pressure drilling system, used in conjunction with a continuous circulating device to control wellbore pressure, helped an international E&P company successfully drill a difficult section of an deepwater exploration well in Ghana, West Africa, in 2012. In the view of Derrick Lewis, global operations manager at Halliburton business line Geobalance Measured Pressured Drilling Service, MPD offers considerable benefits in terms of an additional barrier with the RCD, the ability to mitigate lost circulation and well-control incidents, and the ability to tell if the well is taking an influx or ballooning, as well as an increase in rate of penetration (ROP), which is generally experienced with MPD.

Managed pressure drilling (MPD) recently took a big step into deepwater environments with the installation and utilization of the industry's first rcd drilling rotating control device (RCD) made up below the tension ring and integral to the riser package of a dynamically positioned (DP) drillship.

Fully realizing MPD benefits in deepwater applications requires a focused industry effort to develop guidelines, procedures and standards for equipment procurement, rig modification and design and perhaps most importantly adequate training for rig personnel.

Combined, all MPD riser stack components should be automatically controlled by a central intelligent control unit responding to the unique wellbore signals being monitored, including return flow, to enable immediate detection of changes in fluid flow.

The secondary barrier remains the BOP, wellhead, casing and cement, and conventional well control procedures are used. An EC-Drill® ready rig is in a rig where the supporting equipment is available to allow operation to commence within a short lead time. The decision to deploy MPD in this case followed an unsuccessful 2008 drilling campaign in a nearby offset well that presented an unstable zone and sharp changes in pore pressures.

The RiserCap system, however, has significant limitations due to the RCD being designed for surface applications on land and fixed rigs offshore. Deepwater MPD has resulted in a significant departure from conventional RCD design that introduces a nonrotating device.

Since the 2010 Macondo disaster in the Gulf of Mexico, ESD, led, by a former manager of Houston-based Dril-Quip and Cameron Norway, John Dale, has been working on a BOP concept that it hopes will be a game-changer for drilling safety and efficiency. The greater value to the industry will be an MPD-enabled rig capable of efficiently operating under the daily procedures required during MPD operations once the circulating loop has been closed by the installation of the RCD element.

Mud systems on conventional rigs are also sized for the largest and deepest hole capable of being drilled by the rig. offers 106 rcd drilling machine products. A flow spool-required during RCD installation to divert returns flow to the rig via a flexible armored hose or gas when drilling in a conventional open to atmosphere setting (no RCD bearing installed).

Using the Model 7875 DS system, the RCD bearing and packer assembly is installed through the diverter housing and marine riser system when operations need to shift to MPD mode. Yes, EC-Drill® is well suited to manage pressure during cementing operations. In surface applications, the RCD is installed on top of the BOP stack.

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