Home / Microsites (page 10)

Microsites

Studies confirm performance of salt-free non-aqueous drilling fluid, bioremediation potential of cuttings

Figure 1 depicts the growth of plants in varying ratios of top soil to salt-free NAF cuttings blend. From left are: 100% top soil, 5:1, 3:1, 1:1 and 100% cuttings blend.

Disposal of cuttings from nonaqueous drilling fluids (NAF) can be a significant expense and logistical issue for the operator of a drilling rig. NAFs typically contain high levels of salts, commonly calcium chloride or sodium chloride, in the internal phase of the emulsion. These salts are beneficial for wellbore stabilization but pose issues for cuttings disposal because the salts don’t biodegrade and can accumulate in high concentrations in soil. A salt-free NAF has been developed and field-validated in the Western Canadian Sedimentary Basin in Alberta, Canada. The system uses a biodegradable organic to provide an internal phase with equivalent water activity to traditional salt-containing systems. This results in a fluid system with the performance and benefits of a conventional NAF while potentially allowing for greater cuttings disposal options. Depending on local regulations, the system has the potential to reduce environmental and long-term liability concerns by being able to land-farm drilled cuttings without hindering plant growth.

Read More »

Dual cutting structure on hybrid roller cone bit increases efficiency of bridge, frac plug drill-outs

SlipStream-Bit-v1.0

Drilling out bridge and frac plugs is a regular and inefficient task in multi-zone completions. The job is commonly done using a variety of standard drill bits. However, removing between 15 and 40 plugs comprised of hard outer slips surrounded by ductile composites and elastomer materials presents several challenges to bit performance. Like drilling operations, the completion objective is to efficiently drill as much as possible before having to pull out of hole to replace the bit. The plug’s hard outer slips can quickly wear steel tooth cutting structures so that the bit is increasingly less effective with each plug it drills. It is also difficult to achieve small cuttings across the various plug materials in use, which can limit hole-cleaning efficiency. In addition, the fluid pressure behind isolated completion zones can result in pressure spikes that reduce bearing life.

Read More »

OMV finishes Wisting Central II appraisal well

Wisting Central II

OMV has successfully completed drilling and testing of the Wisting Central II appraisal well. The horizontal well was drilled in the Wisting discovery in the Barents Sea, about 310 km north of Hammerfest. Wisting is the northernmost oil discovery in Norway. Wisting Central II is the fifth well in the production license PL537, which was awarded in the 20th licensing round in 2009. The planning and execution of the well was done in close co-operation with various parts of the Schlumberger organization.

Read More »

IHS: Oil market now reaching bottom as supply, demand begin to balance out

Screen Shot 2016-06-21 at 11.47.24 PM

The downturn in oil prices that has led operators worldwide to reduce budgets and drilling programs has reached a bottom, as the oversupply of oil has begun to balance out with demand, according to IHS Vice President for Energy-wide Perspectives Susan Farrell. “We have oil supply going below what is needed for demand (this year), which means we are finally going to start rebalancing the market going forward,” Ms Farrell said at the 2016 IADC World Drilling Conference on 15 June in Lisbon. While spending is expected to remain flat in the near future, IHS expects an increase in drilling activity beyond 2017 as companies begin to finish paying off debt from pre-downturn investments. Watch the video to learn more.

Read More »

MPD allows for dynamic well control offshore

Screen Shot 2016-06-21 at 11.59.12 PM

When drilling offshore – particularly in deepwater – the distance between the BOP on the seafloor and the rig can potentially leave the riser, as well as the rig, exposed to kicks. “If, for example, an influx or a kick gets past the BOPs, it can travel up the riser. As it gets closer to atmospheric pressure, it can then unload at an exponential rate, causing danger to the personnel, the equipment and of course the environment,” said Guy Feasey, VP of Well Integrity at Weatherford. Managed pressure drilling (MPD) can account for these influxes. It can also provide drillers with additional options on how to deal with these influxes, aside from simply shutting in the BOP. Watch the video with Mr Feasey from the 2016 IADC World Drilling Conference in Lisbon to learn more about how MPD can enable dynamic well control.

Read More »

Drilling Systems pushes simulator, virtual reality technologies to improve rig crew training

Screen Shot 2016-06-21 at 11.43.31 PM

Advances in simulator and virtual reality technologies are helping the drilling industry to bring more life-like training environments to rig crews. At the 2016 IADC World Drilling Conference in Lisbon, Drilling Systems showcased several new simulator-based training technologies, including the On The Rig simulator and the virtual reality-based DrillSIM-5 3D. Watch the video with Drilling Systems CEO Ian Hudson to learn about how these new technologies can help improve crew training.

Read More »