Abstract Chevron has piloted a new well design for near-vertical steamflood producers in the MWSS field. This new design simplifies the well construction process by replacing two hole sizes and two casing strings with a single hole size and single combo casing string. Doing so requires utilizing technologies such as: expansion joint, annular casing packer and cementing stage tool to allow only the top portion of the casing string to be cemented while the slotted casing remains un-cemented. This well design has been piloted in MWSS to replace the previous two-string slotted liner well design. At the time of writing, 26 monobore wells have been installed incident-free and all are a technical success. Chevron has committed to 11 more monobore wells in the nearby Cymric field and is planning to adopt the design throughout its San Joaquin Valley (SJV) fields, with over 70 wells expected by Q3 2012. The monobore design has reduced overall well construction cycle time by 25% and capital expenditure has also been reduced. The implications to well deliverability and accelerated production are obvious and Chevron has begun to increase the well count in specific campaigns to reflect the time and cost savings. Furthermore, the monobore design increases the probability of logs and casing reaching bottom in a single trip, and enhances formation evaluation to include upper zones that would have been behind casing with the previous design. By implementing the monobore design, Chevron will be able to extend the economic development life of the region. The subject matter will be of interest to other operators drilling similar, shallow, low-pressure, heavy-oil reservoirs.