SIDEWINDER DRILLING RIG 107 HOUSTON, TEXAS

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1 SIDEWINDER DRILLING RIG 107 HOUSTON, TEXAS January, 2017 Infrared Inspection Report Sidewinder Drilling Rig 107 Lufkin, Texas Company Contact: Jesse Russell Project: CHARTER OAK DRIVE, LITTLE ROCK, AR PHONE: & FAX:

2 ORDER OF REPORT CONTENTS 1: Data To Facilitate Understanding & Utilizing Scan Report 2: Scan Results Overview & Action Taken Form 3: Identified Faulting Conditions, Information & Photographs 4: List Of Facility Equipment Identified By The Customer Representative & Notations Of Faulting Conditions Found DISCLAIMER This report and the recommendations contained in it are based upon conditions and practices observed and information made available to United Spectrographics personnel. This report does not purport to list all hazards or faulty conditions. It is not intended to indicate that other hazards or faulty conditions do not exist. Severity ratings in the report are based on the criteria shown in this report and are intended as guidelines only. No responsibility is assumed for the control of the facility s condition, maintenance practices or correction of conditions indicated herein. By issuing this report, neither United Spectrographics nor any of its employees makes any warranty, expressed or implied, concerning the contents of this report. Furthermore, neither United Spectrographics nor any of its employees shall be liable in any manner (other than liability that may be expressed in any policy of insurance that may be issued by United Spectrographics) for personal injury or property damage or loss of any kind arising from or connected with this inspection or failure to inspect.

3 Utilizing Report Contents Included in this report are Photographs and Thermographs of problem areas found during our recent Infrared Inspection of your facility. Each problem area picture is accompanied by: Date Location Information Temperature Calculations Color-coded Temperature Intensity and/or Condition Significance Data A Brief Comment Relating The Item In The Photograph To Its Corresponding Thermograph Suggested Corrective Recommendations. In most cases, problems (faults) found will be listed according to the date and order that they were located, rather then by significance or priority, as we feel that you and/or your personnel can best judge this, keeping in mind circuit importance and thermograph intensity. Thermal intensity is indicated by use of a color-coded data inserts that locate a fault s position on the standard electrical failure curve. The color of the insert represents the temperature range of the hottest item, or a portion of the item's circuitry, pointed out in the thermograph. The temperature ranges which the colored inserts represent are grouped as follows: INSERT Red Orange Yellow Green Temperature Range 70ºC/126ºF and higher above Ambient Operating Temp. 40ºC/72ºF to 69ºC/124ºF above Ambient Operating Temp. 25ºC/45ºF to 39ºC/70ºF above Ambient Operating Temp. *10ºC/18ºF to 24ºC/43ºF above Ambient Operating Temp. ( * See page 4)

Determining Cost Effective Responses Electrical equipment failures generally follow a standard mechanical/electrical failure curve. Dividing the failure curve into temp.

4 Determining Cost Effective Responses Electrical equipment failures generally follow a standard mechanical/electrical failure curve. Dividing the failure curve into temp. ranges and locating a problems position on the curve allows us to indicate the probable time to its failure. Knowing a problems probable time to failure allows you to make a cost effective response to the problem areas that we locate. Below is a depiction of the electrical fault failure curve with the thermal intensity ranges and the colors that we assign to faults detailed in our reports. STANDARD ELECTRICAL FAULT FAILURE CURVE (Does Not Include Area In Blue) MINOR INTERMEDIATE SERIOUS CRITICAL DEVICE TEMP IS AMBIENT, BUT DEVICE IS EITHER FAULTY OR UNSAFE. 10ºC * 18ºF 25ºC 45ºF 40 C 72ºF 70 C 126ºF AMBIENT TEMP YEARS MONTHS MONTHS TO WEEKS WEEKS TO NOW FAULTY EQUIP Built In Trend Monitoring When yearly scans are accomplished, report results allow you to trend monitor your electrical equipment without having to cross reference previous report findings. If a previous years problem is not repaired it will show up again in the current scan report and its current intensity range indicates a current effective response.

5 Defining Total Temperature and Ambient Operating Temperature And Explanation For Their Use Total Temperature: Total Temperature = Ambient Operating Temperature + Fault temperature Allows you, the customer, to evaluate possible damage to equipment. Leads fail between 90ºC/194ºF and 110ºC/230º Phenolic fails around 200ºC/392ºF Transformers and Motor Insulation failure temperature depends on insulation class rating. Contacts start to fail around 130ºC/266ºF Ambient Operating Temperature (AOT*) for Infrared Scanning Purposes: Temperature within a device container (Box or Cabinet) that is not directly affected by faulting component = Normal Equipment Operating Temperature Contained By Box or Cabinet. If there is no container (Example: Device mounted to a wall) it is the temperature adjacent to the device not affected by the fault. Allows you, the customer, to determine if device will operate at intended amperage. Most switchgear is rated to operate at approximately 40ºC/104ºF (Industrial) to 50ºC/122ºF (Marine) If AOT is enough above normal rated temperature, either of the following conditions can cause an unanticipated trip. 1. An intermittent high load. 2. A minor (Green) or intermediate (Yellow) fault. Report pages with photographs: PH stands for Visible Light Photograph TH stands for Infrared Light Thermograph *AOT stands for Ambient Operating Temperature Both black & white and color infrared thermographs are presented to better depict the fault condition.

6 In addition to the corrective response time frame suggested below and the failure curve located on the previous page, you may want to consider using the military standard responses presented below. Military Standard For Evaluating Faults Located In Electrical Equipment Utilizing Temperature Data Obtained With Infrared Imaging Equipment: Temperatures rise above Ambient Operating Temperature: *10ºC/18ºF to 24ºC/43ºF component failure unlikely, but corrective measures required at next scheduled routine maintenance period or as scheduling permits. (Green Label) 25ºC/45ºF to 39ºC/70ºF component failure probable, unless corrected. (Yellow Label) 40ºC/72ºF to 69ºC/124ºF component failure almost certain, unless corrected. (Orange Label) 70ºC/126ºF and above component failure imminent. Immediately inform the person responsible for continued operation of equipment. (Red Label) Note: United Spectrographics uses a Blue Label to indicate faults that require attention due to either ambient temperature (Ex: Phase Not Operating), faulty equipment elements or unsafe conditions. * Note: Temperature conditions below 10ºC/18ºF rise above AOT are not considered significant enough to record and are usually not included in the reports unless the fault temperature is being affected by a cooling medium such as oil or wind. Fault Correction Recommendation When Our Source Assessment Is Inaccurate: When a fault is indicated in a connection or component and examination by your electrician does not turn up a loose connection or faulty component where we have indicated, a fault does exist. The electrician should continue to investigate the next connection or component to be found in the direction that the heat is coming from until a source is located. Example: If a molded case breaker line side lead connection lug is indicated as a fault source and is found to be secure, but not frozen in place, look for a loose connection or sign of over temp. in the lead holder lug.

7 SCAN RESULTS OVERVIEW PROMPT ATTENTION ITEMS: Because of: 1. The intensity or heat level indicated at the time of the scan. 2. Deterioration caused by excessive temperature not present at the time of the scan. 3. Physical condition irregularities observed at the time of the scan. We recommend that the following faults be given prompt attention: Faults: None Noted Items With Asterisks Have High Total or Ambient Operating Temperatures. United Spectrographics January, 2017

8 SUMMARY OF FINDINGS FAULTS BY CATEGORY NUMBER OF FAULTS FAULT NO./ITEM NO. MINOR 0 0 INTERMEDIATE 1 1/58 SERIOUS 0 0 CRITICAL 0 0 SERIOUS 0 0 Number of items located at facility: 149 Number of faults: 1

9 ACTION TAKEN Sidewinder Drilling Rig 107 Houston, Texas January, 2017 Fault # Item # Category Repaired Monitor Date Name 1 58 Intermediate

10 PROJECT: CUST REP: SCAN REP: Bama Jason Taylor DATE: 01/05/2017 LOCATION: VFD House MCC Box Labeled: Hopper Heater-VFD 50 Molded Case Breaker PH # 1 > ITEM: SOURCE: TEMP: Bø & Cø of Case Breaker Possible load side internal contact area. Temp. of area indicating a possible faulting condition is: 60ºC / 140ºF Total Temp - 24ºC / 75ºF AOT = 36ºC / 65ºF above AOT. TH # 1 > COMMENTS TH # 1 > Abnormal heat is being generated in case breaker component. See yellow arrows in PH#1 and TH#1. Loose and/or corroded contact area. Clean, inspect and re-secure. If breaker begins nuisance tripping, replace breaker. TEMPERATURE ABOVE AOT 36 C / 65 F

11 AREA EQUIPMENT LIST Following is a list of the electrical equipment located on the Sidewinder Drilling Rig 107, Houston, Texas, and data relating to its operating condition at the time the scan was performed. NOTE: Items noted as visually inspected were not operational or show no visible load at the time of the inspection. No. Equipment Operating Visually Inspected VFD HOUSE 1 Main Plug Board X Fault # 2 MCC Plug Board X 3 Switchgear Plug Board X 4 A/C Unit #1 Control Cabinet X 5 A/C Unit #2 Control Cabinet X 6 Lighting Panel A X 7 Lighting Panel B X MCC 8 Suction Tank Agitator #1-VFD 1 X 9 Suction Tank Agitator #2-VFD 2 X 10 Spare-VFD 3 LOTO 11 DBR1 Tower Blower-VFD 4 X 12 DBR2 Tower Blower-VFD 5 X 13 Backfeed Emergency Power-VFD 6 X 14 Water Pump #1-VFD 7 X 15 Spare-VFD 8 X 16 Diesel Fuel Pump #1-VFD 9 X 17 Drive House AC #1-VFD 10 X 18 Radiator Fan #1-VFD 11 X 19 Mud Mix Pump #1-VFD 12 X 20 Spare-VFD Centrifuge Feeder-VFD 14 X 22 Diesel Fuel Pump #2-VFD 15 X 23 Drive House AC #2-VFD 16 X

12 No. Equipment Operating Visually Inspected 24 Radiator Fan #2-VFD 17 X Fault # 25 Mud Mix Pump #2-VFD 18 X 26 MP1 Motor Blower-VFD 19 X 27 MP1 Oiler-VFD 20 X 28 MP1 Liner Washer-VFD 21 X 29 VFD 22 X 30 Radiator Fan #3-VFD 23 X 31 MP1 Charging Pump #1-VFD 24 X 32 MP2 Motor Blower-VFD 25 X 33 MP2 Oiler-VFD 26 X 34 MP2 Liner Washer-VFD 27 X 35 Spare-VFD 28 LOTO 36 VFD 29 X 37 Air Compressor #1-VFD 30 X 38 MP2 Charging Pump #2-VFD 31 X 39 MP3 Motor Blower-VFD 32 LOTO 40 MP3 Oiler-VFD 33 LOTO 41 MP3 Liner Washer-VFD 34 LOTO 42 Vacuum Pump-VFD 35 X 43 Spare-VFD Air Compressor #2-VFD 37 X 45 Desander-VFD 38 X 46 Shale Shaker #1-VFD 39 X 47 Shale Shaker #2-VFD 40 X 48 Shale Shaker #3-VFD 41 X 49 Radiator Fan #4-VFD 42 X 50 Pressure Washer-VFD 43 X 51 Camp Feeder-VFD 44 X 52 Desilter-VFD 45 X

13 No. Equipment Operating Visually Inspected 53 Remote I/O-VFD 46 X 54 Shaker Tank Agitator #1-VFD 47 X 55 Shaker Tank Agitator #2-VFD 48 X 56 Shaker Tank Agitator #3-VFD 49 X 57 Spare 58 Hopper Heater -VFD 50 X 1 59 Steam Heater-VFD 51 X 60 Electric Heater #1-VFD 52 X 61 Electric Heater #2-VFD 53 X 62 Electric Heater #3-VFD 54 X 63 Electric Heater #4-VFD 55 X 64 Spare-VFD 56 LOTO 65 Spare-VFD 57 LOTO 66 Spare-VFD 58 LOTO 67 Spare-VFD 59 LOTO 68 Trip Tank #1-VFD 60 X 69 Trip Tank #2-VFD 61 X 70 Ground Fault Meter-VFD 62 X 71 Ground Fault Detect Feeder-VFD 63 X 72 VFD 64 X 73 VFD 65 X 74 Incoming Power From PD XFMR X Switchgear 75 Gen 1 Circuit Breaker X 76 Gen 1 Cubicle X V Primary VFD Power X 78 Reactor 1A Feeder X 79 Reactor 1A Cubicle X 80 Gen 2 Circuit Breaker X 81 Gen 2 Cubicle X Fault #

14 No. Equipment Operating Visually Inspected 82 Lighting XFMR Feeder X Fault # 83 Reactor 1B Feeder X 84 Reactor 1B Cubicle X 85 Gen 3 Circuit Breaker X 86 Gen 3 Cubicle X V Aux. 1&2 MCC Bus Feeder X 88 Reactor 2A Feeder X 89 Reactor 2A Cubicle X 90 Gen 4 Circuit Breaker X 91 Gen 4 Cubicle X V Aux. 2 MCC Bus Feeder X VFD Cubicles 93 Drawworks Dynamic Brake X 94 Drawworks Cubicle X 95 Rectifier 2A X 96 Mud Pump 3 X 97 Mud Pump 2 X 98 Rectifier VDP X 99 Top Drive VDP Cubicle X 100 Mud Pump 1 X 101 Control Cubicle X GENERATOR HOUSE 102 Generator No. 1 Motor Leads X 103 Generator No. 1 Plug Board X 104 Generator No. 2 Motor Leads X 105 Generator No. 2 Plug Board X 106 Generator No. 3 Motor Leads X 107 Generator No. 3 Plug Board X

15 No. Equipment Operating Visually Inspected AIR COMPRESSOR AREA 108 Air Compressor Control Cabinet X 109 Air Compressor Control Cabinet X 110 Air Dryer Control Cabinet X BELOW DERRICK AREA 111 Main HPU Control Cabinet X 112 Mud Pits Plug Board X 113 Shaker Plug Board X 114 VFD Plug Board X MUD PUMP AREA 115 Mud Pump No. 1 Motor Leads (Exterior Only) X 116 Mud Pump No. 2 Motor Leads (Exterior Only) X DRILLER S CABIN 117 Plug Board X 118 Canrig Top Drive Transfer Panel X rd Party Remote I/O Cubicle X 120 PC Cubicle X 121 Lighting Panel C X KVA HPS 3ø Transformer X MCC 123 DWA Blower X 124 DW Oiler Pump X 125 DW Cooling Fan X 126 DW HPU Heater X 127 DW Break HPU X 128 Wireline Feeder X 129 Incoming Power From VFD House X 130 Remote I/O X 131 Accumulator Feeder X 132 Spare X Fault #

16 No. Equipment Operating Visually Inspected 133 Spare X Fault # 134 Spare X 135 Spare X 136 Catwalk Feeder X 137 Spare X 138 Spare X 139 Bug Blower #1 X 140 Bug Blower #2 X 141 HPU Feeder X 142 Spare X KVA Rig Lighting XFMR X 144 Driller s Cabin A/C #1 X 145 Driller s Cabin A/C #2 X 146 Spare X 147 Spare X 148 Top Drive CIP Feeder X DERRICK FLOOR 149 Draw Works Motor Leads X

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