Case study: Norway

PRIME enables record breaking e-line
deployed PrecisionCollector debris
cleanout on a highly deviated well
Our customer had a large 7” mono-borecompletion which had an extensive
amount of produced sand debris
accumulated within it, debris that waspreventing the execution of a required
P&A operation on the well.
While wellbore cleanout jobs of thismagnitude are usually reserved for
Coiled Tubing, it was proposed byour team to carry out a high-volume
debris cleanout operation using e-line
deployed technology, leveraging its lightand agile footprint.
Achieving operational efficiency
however would require several
collection chambers to be deployed,
maximizing the debris volume removed
per run, and minimizing the time-ondepth during the collection process – allthis while maintaining safe rig up/down
and deployment of the toolstring intoand out of the well.

Solution
The new PRIME Technology Platform
combined with the PrecisionCollector
was recommended to execute theoperation. This Tractor Technology
would provide efficient high-speed
conveyance when deploying thecollector string to task depth along
the highly deviated section of thewell, saving considerable time onwhat would be a multi-run operation.
During the collection phase, this highly
instrumented Tractor, coupled with thePRIME Direct Drive Rotation device, would
provide a high level of real-time visibility
and system synchronized control,
maximizing the collection efficiency
while minimizing the tool time on depth.
System benefits include:• Continual bit rotation, not only
during collection but also during the
precautionary back-reaming stages• Clear indication of exactly when thecollection chambers were full of debris
In addition, collection chamber quantity
per run in hole would be maximizedusing a special lifting frame during
the toolstring rig-up on the wellhead,providing increased rig up height.
Thorough pre-job tests were carriedout at our Well Intervention Academyin Stavanger to ensure successful
handling of the long toolstring and its
in-well debris collection.
• Safe surface handling and rig-up of a
10-chamber collection toolstring wastested and rehearsed,
and procedures defined.
• A 7” tubing was inserted into theAcademy’s on-site 9-5/8” well to
replicate the actual well completion,and 100 liters of sand was introduced
and left to settle. Collection tests werethen carried out using the actual
toolstring, monitoring the criticalparameter response indetail throughout.

Challenges• An extensive amount of
produced sand debris waspreventing the execution of arequired P&A operation on
the well• Wellbore cleanout jobs of thismagnitude were usually reservedfor Coiled Tubing• An efficient e-line deployedsolution would require asignificant quantity of collection
chambers to be configured perrun, coupled with minimal timeon-depth during thecollection process

Results• A 10 chamber toolstring
configuration enabled up to100 liters of debris collected per
individual run• High volume collection wasachieved – a total of 1400 liters ofdebris removed• High job efficiency achieved –high speed tractor conveyanceand real-time chamber
full indication

Results
A wellsite rig-up utilizing a maximum of
10 collection chambers in the toolstring
was handled safely and efficiently for all
the 20 runs executed, with BHA surface
turnaround times between runs in the 2
to 3 hour range.

• Real-time weight on bit control,
minimizing stall-out occurrence andproviding automatic stall recoverybakerhughes.com

For each run-in hole, tractor conveyanceover the highly deviated sections of thewell reached speeds of over 26 meters/
minute. Debris was deposited in the 7” and4-1/2” tubing sections of the well, requiring
both the PrecisionCollector 450 and 350
technology to be utilized. In both cases,
debris collection proved highly effectiveand efficient, with 100% compacted solids
consistently recovered during the collection
runs – as a result of the robust auger systemdesign. Collection task times per run were 5hours or less, this efficiency was due to theeffectiveness of the collection technology
coupled with a clear and immediate“chambers full” indication seen via surface
readout in real-time – the latter ensuring
there was no excessive and unnecessary
time spent on collection, or any prematurepulling out of hole which would necessitate
additional runs.
The operation resulted in circa 1400 liters ofdebris being removed from the well, and a
depth cleanout of 272 meters, this requiring a
total run time of lessthan 10 days.
It was a record-breaking recovery result for
e-line deployed wellbore cleanout, one which
took this methodology into the realms ofcoiled tubing territory, and which proved it
to be a viable, efficient, and highly effective
option for the customer.

"The goal of this operation was to safely prove the upper limits of e-line deployedcleanout technologies – to leverage its inherent light logistics, footprint andpersonnel requirements and its low carbon footprint to efficiently and costeffectively execute a high volume wellbore cleanout operation, one normallyassigned to Coiled Tubing. A one team approach to job design and planning, risk
handling and execution led to this successful, record breaking outcome which is
expected to benefit other similar operations across the field.”Superintendent, Gullfaks Interventions
Major NCS Operator

Copyright 2023 Baker Hughes Company. All rights reserved. 84792

bakerhughes.com