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Field test report
Drill String Internal Wiper-System
Deepsea Bergen 2010, Norne Field
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CONTENT Executive summary ................................................................................................................................. 3
Introduction ............................................................................................................................................. 4
Objective ................................................................................................................................................. 4
Crew .................................................................................................................................................... 4
Observations prior to drop of DSIW, “conventional” tripping ................................................................ 5
Minutes of field trial ................................................................................................................................ 6
DSIW System components, operational performance & experiences ................................................ 7
Drill String Internal Wiper, DSIW ..................................................................................................... 7
2K Tools 5 ½” Landing Sub, LS ......................................................................................................... 7
Light Impact Fish Tool, LIFT ............................................................................................................. 7
Winch System, WS ........................................................................................................................... 8
Grip Tool, GT .................................................................................................................................... 8
Drill Floor Rack, DFR ........................................................................................................................ 8
Wireline Fishing Tool, WFT .............................................................................................................. 8
Summary DSIW Field Test ....................................................................................................................... 9
3
Executive summary The main objective with the field test was to verify the DSIW´s ability to wipe the interior of the 5 ½”
drill pipe clean from drilling fluid. Also the “total tool management” was in focus, in order to observe
how the tool worked in a regular drilling operation. Therefore 2K Tools prepared the complete DSIW-
System which includes all components and safety systems.
The test was performed at DS Bergen located at the Norne field on the K2 template. Oil Based Drilling
fluid was applied during the DSIW –System testing.
The DSIW Tool performed as expected during the operation and the results were to the Statoil
projects´ full satisfaction. The 5 ½” drill pipe bore was continuously wiped in a length of
approximately 1.800 meters with optimum cleaning efficiency. There was no mud spill from the drill
pipe when it was pulled out of the hole, neither on the rotary nor on the set back area. It was easy to
visually confirm that stands were wiped clean when they were dis-connection and lifted to the set
back area.
The DSIW System will contribute significant to the environmental and economically aspects of the
drilling operations offshore and onshore.
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Introduction The Drill String Internal Wiper System, DSIW-System, has been field tested on the semi submersible
rig Deepsea Bergen, 11th of April 2010 at the Norne field. Statoil gave 2K Tools the opportunity to
perform this field test to verify the DSIW Systems ability to perform under realistic conditions
offshore.
Prior to the field test the DSIW System has been tested successfully in 2K Tools laboratory and at
Ullrigg/IRIS fullscale testrig at Ullandhaug in Stavanger.
DS Bergen was equipped with 5 ½” drill pipe (DP) and the DSIW was dressed accordingly. At the end
of 5 ½” DP the 2K Tools Landing Sub was made up in order to land the DSIW after wiping/tripping out
of hole.
It was oil based mud in the well during the DSIW –System testing.
Objective The main objective with the field test was to verify the ability to wipe the interior of the 5 ½”
drillstring clean from drilling fluid. Also the “total tool management” was in focus, in order to observe
how it worked in a regular drilling operation. Therefore 2K Tools prepared the complete DSIW-
System that includes all components and safety systems.
During the test only the DSIW, Tool Grip and Landing Sub were applied as predicted.
The Winch System with the LIFT (Light Impact Fish Tool) and the WFT (Wireline Fish Tool) was in
contingency. It was not expected to be necessary for these back up systems, since the pulling was
inside casing and no “stuck drill string” problem could occur. Also a cemented and plugged hole gave
minimum risk of well influx.
Crew When dropping the DSIW the following crew was on duty,
Supervisor John Kristian Larsen Statoil
Toolpusher John Ove Olsen Odfjell
Driller Vegar Oen Odfjell
Assistant driller Oddvar Sørli Odfjell
5
Observations prior to drop of DSIW, “conventional” tripping
During the week long rig stay there were
opportunities to monitor the tripping
operations without wiping the interior of
the drillstring.
The “problem” with drill fluid spills on deck
is known to the industry, and 2K Tools got
the opportunity to document this during
tripping operations without appliance of the
DSIW –System.
The pictures on this page illustrates the drill
floor conditions during tripping without
wiping the interior. Roughnecks frequently
had to apply floor wipers and high pressure
water gun to clean and maintain the
drillfloor from mudspills.
These observations gave a good reference
prior to applying the DSIW.
The pictures shows "drain off" from the
drillpipe stands.
6
Minutes of field trial In agreement with Statoil and for best safety for the first field trial the DSIW was dropped after
cementing of the 6” pilot hole. The string was assembled with cement stinger, 2 7/8”, 3,5” and 5 ½”
DP.
The 2K Tools 5 ½” Landing sub was maked up in the DP BHA and positioned between the 5 ½” DP and
3 ½” DP.
Prior to drop of DSIW a 1,67 s.g. slug was pumped. The first slug did not have the required effect. The
level inside the string was just 1 inch below the DP shoulder, and a second slug was prepared and
pumped. After the second slug, the level inside the string was not visible when checking with
flashlight inside the pipe. The DSIW was collected from the DFR (tool rack) and dropped
approximately 04.15 hours the 11th of April.
The freefalling drop inside the string was
approximately 40-50 mtrs below drill floor
level.
When pulling of stands no spill on the set
back was observed, as seen on the picture
to the right from the set back. This
confirmed efficient cleaning of the drill
string.
Approximately 1.800m (61 stands) of 5 1/2”
DP was continuously and successfully wiped
with the DSIW.
Below pictures (pore quality) inside connection were some impression of the cleaning
efficiency could be observed.
Also to be observed that threads and shoulders are clean from drill fluid when wiped with
DSIW. No mudspills on threads and shoulders when stand was lifted off. The effect would
probably reduce wear on threads and shoulders when making up string for next run, due to less
particles (solids) mixed together with the drillpipe dope compound.
7
DSIW System components, operational performance & experiences
Drill String Internal Wiper, DSIW
The DSIW was preassembled and carried from the 2K Tools
tool rack and dropped into the drillstring. No extra tool or
procedures was required for the drop sequence.
Normal tripping started after the DSIW was dropped into
the stringbore. When Landing Sub eventually was set in
drill pipe slips after tripping 61 stands, the DSIW was
revealed inside the Landing Sub as planned and picked
out. No damage on the tool from the drop or trip was
identified after operation. (Pic to the right, dropping DSIW after
slug)
2K Tools 5 ½” Landing Sub, LS
The Landing Sub was maked up at the
end of the 5 1/2" DP when run in hole.
The “wash ball” after cementing job
passed LS without any problem.
The Landing Sub does not represent any
obstacles to run explosives if required.
(Stuck string)
The Landing Sub was handled as any
ordinary Pup Joint. There are no
additional service requirements or loose
parts for adjustment. (Pic. to the right when
make up to string)
Light Impact Fish Tool, LIFT
The LIFT was not applied in the operation. The LIFT was only
demonstrated both to Statoil and Odfjell personal on the
drillfloor/pumproom. The easy latch and charge function was
demonstrated. Comments on tool that it was easy to operate,
both easy to charge, latch on DSIW fish neck and to release
from neck. (Pic. to the right in contingency)
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Winch System, WS
The WS was not applied during test. The WS function was
demonstrated on drillfloor/pumproom. The latch function of
the LIFT and run procedure was explained and reviewed. All
comments from personal was positive, based on the
equipments easy function and operability.
The tool will only be applied if string is stuck or for other
reasons there is a need to fish out the DSIW from the string
during tripping. (Pic. to the right in contingency in DFR)
Grip Tool, GT
The GT (Grip Tool) was applied problem free when
picking the DSIW out of the Landing Sub after the
tripping operation. Immediate latch on the DSIW fish
nech and pull out of Landing Sub. (Pic. to the right)
Drill Floor Rack, DFR
For practical reasons the DFR was located in the
pumproom while waiting on the operation. Prior to trip
the DFR was installed on the drillfloor (pictures)
outside red zone, but 6-7 mtrs from RKB. DFR were
located in a safe place and away from drill floor
activities, tug wires, lifting operations, etc. The DFR
was supported on it’s fundament and strapped to the
derrick beams for best safety and stability.
The DFR function as a tool
storage rack worked fine, were
equipment was compactly and
safely stored. The DFR was
hoisted with the crane into cat
walk and carried to its location
on the drill floor. (Pic. to the right
placed on drillfloor)
Wireline Fishing Tool, WFT
The WFT is a contingency tool and was not applied in the
operation. The WFT was located on the rig during the test
period. The tool was demonstrated/reviewed for the Statoil
personal and rig crew. WFT is designed for slick/wireline and
can be applied if DSIW needs to be fished from string/Landing
Sub deeper than WS capacity. (Pic. to the right in contingency)
9
Summary DSIW Field Test The DSIW Tool performed as expected during the operations and to Statoil projects´ satisfaction. The
5 ½” drillpipe bore was continuously wiped in a length of approximately 1.800 meters with optimum
cleaning efficiency. No mud spill was observed from the drill pipe stands when being pulled out of
the hole and placed in the set back.
Efficiency and effects
5 ½” DP was completely wiped clean and the drilling fluid returned to well while tripping.
No mud spills on drillfloor or drains.
Reduced maintenance and floor cleaning.
Operability
DSIW System can easily be run by the rig crew, no additional service personnel required. No
extra skills required except knowledge of the system and function.
Intervention by the rig crew only required when dropping and retrieving the DSIW, before
and after trip operation.
Easy to visually see that interior of stands were wiped with DSIW, function obtained.
Mobility
Components in the system could easily be handled by one crew member during preparations
and operation. During this operation 2K Tools personal handled the equipment for survey
reasons.
2K Tools Landing sub was handled as any ordinary 5 1/2" pup Joint.
HSE
No potential risk or danger revealed during operation of the DSIW-System Components.
Significant Improvement of the Drill Floor Working Environment.
Reduced personal exposure in the red zone due to reduced cleaning/maintenance activities.
Economics
Reduced costs in slop production, handling and treatment, on rig, boat and land.
Reuse of drill fluid due to return to hole.
The DSIW System will be a significant contribution to the oil and gas industry and represents
operational, environmental and economical improvements in drilling operations
offshore and onshore.
______________________ __________________________
Ketil Botnmark, 2K Tools AS Kjell Mikalsen, 2K Tools AS
General Manager Technical Manager
______________________ __________________________
Koen Sinke, Statoil ASA John Kristian Larsen, Statoil ASA
Drilling Supervisor Supervisor during field test
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Mail adress Visit
2K TOOLS AS 2K TOOLS AS
Postboks 192 Teknologiveien 11.
8503 Narvik, Norway 8517 Narvik, Norway
Contact
2K TOOLS AS
Phone +47 76961920
Fax +47 76961929
e-mail [email protected]
www.2ktools.com
Ketil Botnmark Kjell Mikalsen
General Manager Technical Manager
Phone +47 76961921 +47 76961922
Mob +47 90925054 +47 90015296
