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GdFSuez Operators with live LNG from an VetcoGray, a GE Oil & Gas remove all of the sand, leaving it spread over
LNG carrier. Company – SEM5 the wellbore, while sometimes forcing sand
SEM5 is a fifth-generation subsea electronics back into perforations. An innovative solution
module for use in subsea production control sponsored by StatoilHydril and Shell has been
systems. The SEM offers new levels of open developed by Welltec
®
. The Well Cleaner
®
architecture IP-enabled communication PST (power suction tool) is run on electric-
capabilities through the application of a truly line, and is more effective at recovering sand
modular design approach, realising industry and debris from producing wells. With its
subsea plug-and-play ambitions. An extensive large drawdown, this new system is able to
variety of modem options in terms of type and lift sand into long bailer sections and is
speed are designed to satisfy any customer’s capable of bailing up to one metric ton of
bandwidth and offset requirements. The SEM sand per run. In comparison, slickline bailers
also supports the industry-standard interfaces recover between four and nine litres of sand.
SIIS 1-3 and IWIS, as well as providing full The new cleaning system provides a cost
sensor interface capability. A 32-bit micro- benefit over ‘heavy’ pipe solutions due to less
controller using a commercial realtime mobilisation of people and equipment. The
operating system (RTOS) processing module Well Cleaner PST takes in well fluid and solids,
can be fitted as daughterboard to any internal filters out the solids and returns cleaned fluid
electronic module that requires processing to the wellbore. It is a flexible bailer system
power, each with its own independent IP with sizes ranging from 3.7 to 7 inches (outer
address directly addressable from the surface. diameter). DIfferent inlet nozzles can be
US Synthetic Corp, a Dover All internal cards have the same format and applied to pick up sand on the low side, as
Company – Diamond Radial Bearings the majority can be fitted in any backplane well as to break through massive sand bridges
US Synthetic Bearings has developed a slot. SEM5 captures VetcoGray’s design that have built up.
diamond radial bearing that is capable of heritage and learning from over 25 years of
operating in drilling fluid environments. It is subsea experience and represents a radical WesternGeco – Coil Shooting
extremely resistant to abrasion and provides new approach that capitalises on GE’s well- Coil Shooting acquires full-azimuth (FAZ)
bearing lives that are two to eight times longer known leadership in electronics. Inherent marine seismic data continuously with a
than tungsten carbide or other hard metal within the design are measures to enhance circular geometry using only a single seismic
bearings. Polycrystalline diamond pads are SEM5’s resilience to future obsolescence issues vessel. Coil Shooting takes geophysics further
formed, machined and placed using patent- with electronic components, currently an by enhancing current multi- and wide-azimuth
pending techniques to form a diamond radial industry-wide issue. Enhanced reliability is (MAZ and WAZ) acquisition techniques. MAZ
bearing that runs smoothly on polished achieved with thermal management and and WAZ are proven methods of seismic
precision diamond surfaces. Despite precision modelling integral to the design: on-board acquisition for complex geological areas. The
diagnostics and fault-tolerant input/output MAZ technique involves shooting a survey
(I/O). The robust mechanical construction will several times with one vessel, each experiment
meet shock, vibration and temperature-cycle being on a different heading. The WAZ
requirements of ISO 13628. technique involves acquisition with a number
of source and recording streamer vessels. In
Weatherford International, Ltd – both cases the result is better illumination,
OneTrip StarBurst™ higher signal-to-noise ratio and improved
Multilateral System seismic resolution compared with traditional
Weatherford’s OneTrip Starburst™ 3D methods. However, Coil Shooting enables
Multilateral System is the industry’s first one- complex FAZ 3D surveys to be efficiently
trip Level 4 multilateral system. The system is acquired using only one vessel. By sailing
clearances, these bearings can withstand the particularly well-suited for wells in mature in overlapping circles, a very large number
rigours of drilling fluid lubrication and dynamic fields where production rates are declining. of shot/receiver positions can be created
down-hole environments. These bearings find The system is extremely cost-effective as it and a single source/receiver boat can
application as the near-bit bearing set in mud saves clients two pipe trips, which equals produce unprecedented offset and azimuth
motors and turbines. In these applications, two days of rig time, compared with the sampling, which leads to higher-quality
bearing life has been extended and bearing existing StarBurst system, which requires images with superior noise suppression. Using
reliability improved. Diamond radial bearings three pipe trips. Q-Marine technology means that it is possible
have also found application in power to sail in circles while maintaining constant
generation and rotary steerable tools, where Welltec
®
– Well Cleaner
®
PST streamer separation and achieving accurate
bearing life has been at least tripled compared Sand clean-outs are typically performed with receiver positioning. Therefore, Coil Shooting
with conventional tungsten carbide bearings. either slickline bailers or coiled tubing (CT). In not only is extremely efficient, but also delivers
These bearings are available in diameters of 1 high angles, CT clean-outs can break down data that address some of the challenges of
to 10 inches. bridges but rarely achieve circulation rates to imaging complex geologies. ■
EXPLORATION & PRODUCTION – VOLUME 7 ISSUE 1
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