Efficient access to multiple permeable natural gas zones located in deep, over pressured, and extremely corrosive environments presents a challenge for South Texas operating companies. An innovative completion technique, featuring corrosion resistant alloy (CRA) tubulars has been effectively implemented by blending features of monobore, slim-hole, and conventional completion geometries.
Vacuum insulated tubing (VIT) has been used successfully to mitigate the potentially harmful effects of annular pressure buildup (APB). In a recent deepwater installation, the subject well had lost alternate APB mitigation capability through a series of events. VIT was then chosen as the only viable technology.
Annulus Pressure Management refers to an engineered approach ensuring that casing annulus pressures do not challenge the well’s integrity during the life of the well. The aim is to maintain the casing pressure within the well’s mechanical design limits at all times by controlling the ‘A’ annulus pressure.
The ‘A’ annulus is the annular space between the production tubing and the first string of casing (i.e. production casing) as shown in Figure 1. In subsea wells, the ‘A’ annulus is the only annulus that can be monitored and controlled.
GATE, Inc. is proud to announce the acquisition of VIKING Engineering, L.C. headquartered in Houston, TX. Viking Engineering is a leading upstream oil and gas engineering company specializing in critical well design. Viking’s specific areas of expertise involve high pressure high temperature (HPHT) downhole tubular design, as well as material selection for harsh environment wells, certification for offshore and land based tubular designs, training and downhole failure analysis.