Siem WIS. Siem WIS AS. Closed Loop Drilling CLD. August Siem WIS AS.

Transcription

1 AS Closed Loop Drilling CLD August AS.

2 Technology summary has secured intellectual property rights (IPR) for all key components of its portfolio: CircSub To drill with constant Mud Circulation RPCD Riser Pressure Control Device PCD Pressure Control Device Subsea Accumulator RCIV Remote Controlled Intervention Valve PCD, RPCD and CircSub stand alone products/market or operated together for Closed Loop Drilling (CLD) Targeting offshore and land drilling with all products 2010 AS. Confidential

3 Conventional Drilling of oil and gas wells To avoid a well flowing on an open return to surface during Drilling, the mud weight creates a barrier against the well pressure. A mechanical barrier, the BOP, is the second one. By utilizing PCD/RPCD an additional barrier element is provided during drilling operation. This barrier element is monitored continuously and is replaceable. For MPD drilling this is a required equipment. Mud weight BOP PCD/RPCD 2009 AS. Confidential Well Pressure

4 along hole depth Normal drilling with a narrow pressure window pore frac static normal circ well pressure Drilling window Normal drilling gives a narrow pressure window 2010 AS. Confidential

5 technology CircSub Continuous mud circulation during make and break of pipe Riser Pressure Control Device, RPCD Isolates the riser annulus below the slip joint to provide a closed loop, and operations within normal weather limitations Pressure Control Device, PCD Provides a seal towards the drillpipe for fixed platforms and land operations technology in combination provides MPD capabilities 2010 AS. Confidential

6 Case for CLD with Pressure control Some of the added advantages of applying the CLD technology include: Significant improvement in health, safety and environmental aspects and risks related to drilling operations Possible to drill hole sections with hole stability issues. Avoiding conventional drilling NPT problems such as lost circulation, kicks, nuisance gas zones and differential sticking. Reducing the number of casing strings and deepening casing set points. Increase operation efficiency by mitigating ECD problems Enabling access to potential assets/reservoirs previously believed to be undrillable AS. Confidential

7 The pressure gradient system Patented solution, passive non rotating seals Continuous regulation of pressure Divides equal pressure across seals 0 Bar Evacuates volume displaced by tool joint Continuous seal integrity logging and monitoring 25 Bar 50 Bar 75 Bar 100 Bar 2010 AS. Confidential

8 PCD (Pressure Control Device)

9 PCD equipment PCD unit PCD cartridge PCD bore protector 2010 AS. Confidential

10 Alternative single seal system 2010 AS. Confidential

11 Gullfaks C, MPD operation Job data: Meter drilled: 2484m (8150 feet) ROP: 10m/hr (32 feet/hr) Max RPM: 180 Well pressure 40bar (580psi) Statoil quote (June 24, 2010): The PCD system Pilot test at Gullfaks C-06 has in many areas improved the capped MPD technology overall and brought a simpler and safer system into to the industry: both technically and for the crew working on the rig floor A summary of achievements is listed as follows: - Simpler rig up and rig down - Safer method to change seal - No work on scaffolding or in man riding gear - Less spill on rig floor and BOP level - Planned and controlled change out of seal - Hole making pr seal cartridge achieved is comparable to competitive system 2010 AS. Confidential

12 Riser seal solution RPCD The set-up shows the seal as a part of a riser configuration This solution will eliminate the need for high pressure equipment above the seal Standard slip joints can be used, with normal weather limitations The retrievable sealing elements are run piggy back through the riser The operation does not have to be aborted due to seal leakage indications 2010 AS. Confidential

13 Alternative single seal rotating systems 2009 AS. Confidential

14 Statoil `s Newsletter drilling and well Well Informed April AS. Confidential

15 CircSub Continuous mud circulation device

16 CircSub pros and cons Drilled Length/Well Extension Equipment Lifetime Time: Connections Time: Testing Time: Handling Connection Influx Eliminate a casing Hole stability Hole cleaning Continuous Logging Managed Pressure Drilling CircSubTM Footprint 2010 AS. Confidential

17 CircSub status Prototype test completed in Aberdeen May/June 08 with success. CircSub concept proven: Soft break 5 ½ seals Gradient chamber between the seals Handling efficiency Mud flow control Extended seal qualification to 5000psi working pressure successfully performed July 2009 Mark 1 design of the CircSub ongoing, based on experiences from test and pilot operation input is ongoing AS. Confidential

18 CircSub in combination with [R]PCD provides a simple closed loop drilling solution Supply Rig Supply 3party equipment By using the components together, a closed mud loop is provided. - Possible to drill depleted reservoir with a lower and more stable ECD - No start and stop of mud pumps will avoid ballooning effect in the wellbore - Constant circulation have great benefits for HTHP operations - Excellent volume control - Closed loop drilling will represent safer drilling - Closed loop drilling increases drilling efficiency - Improved well barrier situation and control 2010 AS. Confidential

19 Drilling Market summary Global energy demand growth combined with need for increased oil recovery (IOR) and increasing number of deep sea reservoirs will lead to increasing demand for MPD and Closed Loop Drilling services - More exploration wells - Longer time to drill wells (deeper, more complex) - Increased production drilling - More challenging well characteristics and smaller drilling window Significant drive towards safer drilling, reduction of non productive time (NPT) and increased drilling efficiency! 2010 AS. Confidential

20 Major fields are getting older Closed loop drilling or MPD required to increase recovery rates Fields originally thought to last for 20 years now last for 50 years Increasing recovery rates in focus 2010 AS. Confidential

21 Total number of exploration & development wells drilled worldwide Approximately wells are drilled annually Annual number of offshore wells drilled varies between per year (represent approximately 2/3 of total drilling costs) Over 4,000 named oilfields with a population of almost one million individual wells 2010 AS. Confidential Source: IHS Energy

22 Sources of non-productive time in drilling operations Causes related to pore pressure and wellbore instability represent 41% of NPT (Dodson, 2004) Rig downtime account for approximately 20% of NPT (MMS, 2005) 25 % Sources of NPT 20 % 15 % 10 % 5 % 0 % 2010 AS. Confidential

23 Future expansion. Riserless Drilling/Well Intervention Experience from using the seal technology in the CircSub, RPCD and PCD operations will form the basis for the Riserless development and CLD service The length of drillpipe that will be run through seals from today up to 2011, will form a good basis to introduce the sealing solution for subsea use The first subsea application can be Plug and Abandonment (P&A) jobs. Many old wells are ready to be plugged, an operation which today is normally handled by a full rig spread. With the new sealing technology this can be done from a vessel, running pipe Riserless to set the plugs necessary prior removing the subsea x-tree (2012). The experience from the P/A will then be moved into the Riserless intervention segment utilizing coil/pipe (2012) 2010 AS. Confidential