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Innovating While Drilling

Drill bit innovations target major barriers to ROP, durability

BHGE’s Dynamus drill bit was designed to extend the life of the bit, as well as the BHA, by reducing vibration. It incorporates two technologies that had been developed but not yet deployed: the StayTrue diamond elements and StayCool 2.0 cutters. Since its launch in summer 2017, the Dynamus bit has been run in the Permian, Eagle Ford, SCOOP, STACK, Bakken, Niobrara, Marcellus, Saudi Arabia, Kuwait, Canada and Oman, as well as in the North Sea and Gulf of Mexico.

Although a drill bit is but one component of a large and complex drilling system, it can have an outsized impact on the efficiency of a drilling operation. “While the amount of money spent on drill bits may be less than 1% of the total cost of the well, it can really be argued that no single component contributes more to the overall drilling performance,” said Wiley Long, Bits and Drilling Tools Product Champion at Smith Bits, a Schlumberger company...

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Digital solutions guide path to better accuracy in directional drilling

Schlumberger’s abbl drilling operations advisor service leverages real-time downhole and surface data to recommend steering instructions to guide the bit along the well plan. It also provides objective slide feedback, such as direction, length, toolface control, motor output and rotary tendencies, while steering operations are executed. Photo Courtesy of Schlumberger.

The global directional drilling services market has taken a big hit during this downturn. In terms of market value, directional drilling fell from $16.55 billion in 2014 to $10.95 billion in 2015, then shrank further in 2016 to just $6.71 billion. Most of these reductions were brought about by project cancellations in the low oil price environment, according to Rajashekar Lokam, Research Analyst at Mordor Intelligence...

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MPD vs underbalanced drilling: 10 ways they differ in operational strategy and implementation

Figure 1: Several different types of unconventional drilling techniques (UDTs) exist. The UDT equipment suite negates the conventional drilling mud circulation. Drilling fluid in UDTs can also be either single- or multiphase.

The petroleum drilling industry drills many well sections using some type of unconventional drilling technique (UDT). A drilling operation is a UDT if it does not follow the conventional drilling method as done in the majority of cases. Conventional drilling utilizes a single-phase drilling fluid, which works on the premise of keeping an overbalanced pressure at the sand face. It discourages influx from a reservoir while drilling or when drilling stops for any other operation. Conventional drilling is also an open-loop operation, where the returned fluid from the well is directed to a flowline that is open to atmosphere...

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Churchill Drilling Tools launches dartless version of self-filling float

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Churchill Drilling Tools has introduced a dartless version of its self-filling float. The original dart-activated version allows the string to self-fill while running in hole and can reduce trip time by 30% to 50% compared with regular floats, according to the company. The float remains dormant while it’s run in hole and is later activated with a dart. In late 2017, the company launched the SFF Trigger, a dartless version of the self-filling float. Like the original self-filling float, the SFF Trigger remains dormant while it’s run in hole. However, a new automatic activation system is triggered when the float reaches a preset depth and pressure. In this video from the 2018 SPE/IADC Middle East Drilling Technology Conference in Abu Dhabi, Nicholas Kjaer, General Manager-Middle East for Churchill Drilling Tools, explains how the automatic activation system works, as well as the benefits of dartless activation...

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