Weatherford Drilling with Casing

Weatherford Drilling with Casing Claas Wilken DRILLING WITH CASING

There are potential DwC opportunities when 1. I am drilling short conductor/surface casing 2. I plan to batch-drill 3. The section will encounter loss circulation and need to save mud cost 4. I have trouble getting casing or liner to TD, reaming before running casing is standard practice 5. I am drilling through high pressure zone into low pressure reservoir or weak zone 6. When running in casing to seafloor I have trouble finding the predrilled hole 7. I can use non-retrievable DwC as the section doesn t require logging or steering DRILLING WITH CASING 2016 Weatherford. All rights reserved. 2 2

Weatherford DwC Foot Print Implemented in 35 countries servicing over 134 clients Focus on non-retrievable system Time saving Problem resolution Manufactured and shipped over 1,800 tools to date Drilled over 1500 wells, 594,000m in total section length Casing sizes from 4-1/2 to 24 DRILLING WITH CASING 2016 Weatherford. All rights reserved. 3

KPI s Longest Section 3,660 m Total Job Count 1,539 Deepest Measured Depth 9,182 m Longest Distance Drilled 1,059m Total Section Length 594,087m Highest Inclination 95 Average On-Bottom ROP 46 m/hr String Cemented 98.1% Highest On-Bottom ROP 290 m/hr DRILLING WITH CASING String Reached TD 93.8% 2016 Weatherford. All rights reserved. 4

Non-Retrievable DwC Defyer Series Drillable Casing Bit PDC Cutters Steel blade strip DPA Series Aluminum blade support Excellent Reaming Tools DT Series Steel Outer Body Tungsten Carbide Hardfacing on Aircraft grade Aluminum nose (fully PDC drillable) Interchangeable nozzles 6mm round TSP embedded into the aluminum blade PDC gage cutters 80% less steel to drill out Drill up to 20,000psi Unconfined Compressive Strength (UCS) formation Ceramic Nozzle Drill up to 7,000psi Unconfined Compressive Strength (UCS) formation DRILLING WITH CASING 2016 Weatherford. All rights reserved. 5

WFT DwC Jobs in Romania - Equipment Bit - drillable casing bit Defyer DPA4416 Float collar single poppet value Model 402NP Centralizer - 2x SpiralGlider HD on the 1 st joint, then 1 centralizer every 3 rd joint Connection - Tenaris ER (13-3/8 ) and Tenaris XP (9-5/8 ) Casing Drive - Volant CRTi3-7.0 used to make up and drill in the casing SpiraGlider HD DPA4416X 9-5/8 DPA4416X Float Collar 402NP Volant CRTi3-7.0 DRILLING WITH CASING 2016 Weatherford. All rights reserved. 9

WFT DwC Jobs in Romania DwC in 13-3/8 and 9-5/8 sections. Best performance record achieved when drilling to 355m TD in 10.6hrs Average on-bottom ROP was 33 m/hr and median section drilling time is 14.9hrs. Casing bit was drilled out with conventional PDC bit in 10-15mins. Total time drilling shoe track was 30-60mins In the last 406m interval, operator managed to complete DwC in 14.75hrs, saving 47% drilling time compare to conventional drilling DRILLING WITH CASING 2016 Weatherford. All rights reserved. 10

N.P.T. Performance and N.C.R. Status Non-Productive Time (NPT) 2015 Q1 Q2 Q3 Q4 TOTAL Number of Jobs 1 5 6 5 17 Operational Hours 64 139.5 123 122 447.5 NPT Hours 0 0 0 0 0 NPT Rate (%) 0 0 0 0 0 Jobs Efficiency (%) 100 100 100 100 100 Non-Conformity Reports 2015 Q1 Q2 Q3 Q4 TOTAL Number of Jobs 1 5 6 5 17 N.C.R. 0 0 0 0 0 DRILLING WITH CASING 2016 Weatherford. All rights reserved. 11

RwC System Salvaged Client s Well Date: 13 March 2013 Client: Shell Ukraine Location: Kharkiv Region Formation : Claystone & Sandstone Hole Size: 12-1/4 Casing: 9 7/8, 66.9#, Q125R, Vam Top Reaming Interval: 1800m - 3274m Flow Rate: 194-211 gpm Torque: 12-20k ft-lbs. (21,000 connection limit) Value to Client Previously spent over 3 months trying unsuccessfully to complete the section, each time TD was reached the drill string could not be freely pulled out of the hole, requiring several days and sometimes weeks for back-reaming. RwC system enabled casing to be set at planned TD where conventional methods proved unsuccessful by various operators The client value for this project was estimated to be in excess of $1.0M, for eliminating the cost of plugging and abandoning this well and eliminating 8 months time for contingency operations. 500Ton OverDrive System 9-7/8 x 12 Defyer CleanReam Case History 5 2016 Weatherford. All rights reserved. 14

Gazprom Russia DwC (12-3/4 x 15-1/2 ) Utilizing Weatherford DPA drilling with casing bits to drill through permafrost Completed a total of 22 jobs to date. ROP averaging 20m/hr. Saved over 5M RUB using drilling with casing technology Case History 3 2016 Weatherford. All rights reserved. 15

Apache China Batch DwC Performance DwC Operation Time Breakdown DwC Rate of Penetration (ROP) Saved 23.3 days (65%) The 13-3/8 DwC operation was carried out without incident or accident All 24 wells reached planned casing setting depths. Drilled a total of 6149m in 12.8 days. Average DwC distance was 256m to 296m MD. Drilled and cemented final 8 wells totaling 2017m in the last 2.7 days, ~ 3 wells per day. The DwC operation saved 23.3 days rig time or 65% versus plan. $1.5 MM US saved. Cemented through the DwC spear as planned. Case History 1 2016 Weatherford. All rights reserved. 16

TIME, HRS Case Histories 1:Operational Time ConocoPhillips China Batch DwC 30 25 Conventional drilling operation time (including cement) : 28hr Average drilling operation time (including cement) : 9.26hr 20 15 10 5 0 PL1 9-3- C23 3 6 9 12 15 18 21 24 27 30 33 36 39 42 45 2016 Weatherford. All rights reserved.