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Torque Wrench 10-100 Mobile Bucking Unit
1© 2006 Weatherford. All rights reserved.
Mobile Bucking Unit
• Designed for making up and breaking out joints of drill-pipe ranging from 2 ½ to 10inch in tool joint diameter.
2© 2006 Weatherford. All rights reserved.
World First
• Weatherford’s world first TW 10-100 MBU is operating for BHPBilliton’s Stybarrow campaign on the Atwood Eagle.
• It was designed for BHPB as they saw a need to make up BHA assemblies offline in a safe environment on the pipe deck.
• Currently the unit is making up BHA to 70 feet in length
• Not solely used for BHA, it currently also makes up tools such as:
– Cement head stand, ready to rack back in derrick
– Well head running and retrieval tools
– B.O.P test plugs
– TIW valves
– X-overs and Jetting tools
3© 2006 Weatherford. All rights reserved.
MBU Key Features
• The equipment is stand alone and only requires a 440V power connection.
• It is transportable and is designed to be lifted on/off the rig when operations dictate. DNV certified
• The Tong is capable of producing 100 000ft/lbs of torque.
• Spinner is capable of a producing 3000ft/lbs of torque.
• Weatherford’s new 3 jaw clamping system, eliminating jaw slip and damage to tool joints.
• What separates this from other Bucking or CAM Units.
– Mobility
– Has the advantage of being loaded and unloaded from above, so its perfect for areas where you are tight on space.
4© 2006 Weatherford. All rights reserved.
Reliability
• Reliability– The 4 main components: Torque Wrench, Spinner, Electric Power Unit and
Control Cabinet are all components that are field proven on other Weatherford equipment.
– Designed and manufactured by Weatherford in Germany
– Backed by Weatherford Australia’s local operational and technical assistance.
– Currently 7 trained operators in Australia
– Supported by Weatherford’s QAQC program consisting of:
• Work Instructions
• Service Instructions
• Maintenance Registers and Spares Inventory
• Torque Connection Tracker sheet
• Level 1 and 2 competency training for operators
• Comprehensive Operators Manual
5© 2006 Weatherford. All rights reserved.
Safety
Safety:
– BHA tools can be loaded safely and securely with the use of a gantry or deck crane.
– It is operated by remote control allowing operator to maintain asafe distance from moving machinery.
– Emergency shut down devices fitted to the unit that allows quickshut down of hydraulics in the event of a spill.
– MBU base frame incorporates a spill containment area.
– Hazardous operations on the rig floor are reduced:
• Use of manual rig tongs
• Eliminates heavy stabilizers and 36” hole openers swinging around on tuggers.
6© 2006 Weatherford. All rights reserved.
Real Results
• Results from the Stybarrow campaign have been collated and the results are showing significant savings in critical path time.
• Comparisons were made to the previous well centre and it was calculated that on average each connection would save 15mins andeach Cement Head stand approx 60mins critical path time.
• It was also calculated that an additional 75% of this figure would be saved again in breaking out connections.
• The following slide shows the type and number of connections that were made in a 37 day period, when you add the 15hrs of makeup time saved with an additional 11hrs of breakout time the MBU hassaved more than 25hrs of rig time.
• Already saving one days rig rate of $350 000 USD.
7© 2006 Weatherford. All rights reserved.
Recorded Connections for Well Centre C
8© 2006 Weatherford. All rights reserved.
Comparison
• The previous example displayed how quickly 1 days operating costs can be saved using the MBU
• The following example shows the savings that have been gained from the beginning of the installation of the MBU
• Since this time the MBU has in excess of 300 connections for make up only. (period from 15th Oct 06 –6th Aug 07)
• The following slides display the number of total connections recorded as well as Cement Head assemblies.
9© 2006 Weatherford. All rights reserved.
Total Connections
• Based on this data the MBU has saved the StybarrowCampaign a total of 131hrs of critical path time in less than 10 months.
SAVING - 1.92 Million USD
The figures can be changed according to current rig rates and rig floor connection times for specific rigs
10© 2006 Weatherford. All rights reserved.
MAKE UP BHA Cement Stands Running Tools Misc Total
Total Connections to date 91 13 154 4 262
Time saved per Connection/mins 15 60 15 15
Total Time Saved/mins 1365 780 2310 60 4515
Time Saved/hrs 75.25
BREAK OUT
Percentage of Break out time vs makeup 75%56.44
TOTAL
Make up and Break out/hrs 131.69
Rig Day Rate/$US $350,000
TOTAL SAVED/$US $1,920,443
Period from 15-Oct 6-AugTotal 9,21 months/days
ConsiderationsThe MBU w as not used for every connection during the f irst w ell centreMake up times are calculated on comparisons from previous operations on the Atw ood Eagle
11© 2006 Weatherford. All rights reserved.
Torque Connection Sheet
12© 2006 Weatherford. All rights reserved.
Flexibility
30” Running Tool being made to X-over
13© 2006 Weatherford. All rights reserved.
36” Hole Opener Assembly
50ft assembly with lift nubbin ready to be lifted to drill floor
14© 2006 Weatherford. All rights reserved.
Transportation to the rig
15© 2006 Weatherford. All rights reserved.
MBU deck position on Atwood Eagle
16© 2006 Weatherford. All rights reserved.
MBU deck position on Atwood Eagle
17© 2006 Weatherford. All rights reserved.
Mobile Bucking Unit