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VISUAL INSPECTION pt 2

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VISUAL INSPECTION pt 2

  1. 1. PRESENTED BY MOGEKWU CHINYE KELVIN VENUE HAVILAH ENERGY CONFERENCE ROOM
  2. 2.  INTRODUCTION  HEALTH AND SAFETY  VISUAL IDENTIFICATION OF CASING/TUBULARS  API GRADES OF CASING  VISUAL INSPECTION EQUIPMENT CHECK LIST  VISUAL INSPECTION PROCESS  TYPES OF CONNECTION  DRIFTING  VISUAL IDENTIFICATION OF THREADS  THE END  REFRESHMENT
  3. 3.  API-AMERICAN PETROLEUM INSTITUTE  CR-CHROME  EU-EXTERNAL UPSET  FGL-FIBER GLASS LINING  IU-INTERNAL UPSET  NU-NON UPSET  SLHT-SEAL LOCK HIGH TORQUE  TPI-THREAD PER INCH
  4. 4. Oil country tubular goods form the bases of well construction, planning and budget. To that effect, the quality and efficiency of casing and Tubular has to be ascertained with a proper Identification and inspection process. Visual Thread Inspection is the use of tools and techniques to visually check for thread damage which includes pitting, burr and galling.
  5. 5.  At stonewall Tech Nigeria Limited, we promote HSE culture as our core practice in operation handling and delivery.  We Observe our client company life saving rules in Health and safety.  Use of Tool Box talk as a key tool before commencement of operation.  Use of 5x5 Rules During accident or near miss.
  6. 6. Casing and Tubing can be identified using the following characteristics.  Dimensions  Coupling Stencil  Body Stencil  Colour Codes  Thread pattern/profile
  7. 7. Casing and Tubing come in the following range: Range 1 16-25 Range 2 26-34 Range 3 34+ Table source: Pan Meridian Tubular
  8. 8. This is a pictorial view of a coupling with the following stencil:  5CT- API Specification.  3/3- Date of manufacture.  HTNO- Heat number  Vam Top- Brand of Vallorec  Colour Code- Violet.
  9. 9. This is a pictorial view of a Pipe Body Stencil  TSD- Tenaris Sydeca  9 ⅝-Pipe Diameter  0117- API licence number  Po- Purchase Order Number  44.15- pipe Length  SF-Special End finish
  10. 10. N80.1 -Red Coupling -1 Strip Red band on Body L80.1 -Red Coupling with a brown band -Pipe Body with Red and Brown Band L80 13 CR -Red Coupling with a yellow band -pipe body with red, brown and yellow band. -13% Chromeage J55 -Bright Green coupling with white stripe -pipe body with bright green Band
  11. 11. Premium connections comes with their own thread patterns/connection. This is because most of these patterns are patented under API license. Below are various thread profiles which comes in various patterns
  12. 12.  API standardized several grades of steel that have different chemical content, manufacture processes, and heat treatments, and therefore different mechanical properties.  API organized these tubing grades into three groups which include:  Group 1 is for all tubing in grades H40, J55, and N80.  Group 2 is for restricted-yield tubing grades L80, C90, and T95.  Group 3 is for high-strength tubing in seamless grade P110. The API grade letter designation was selected arbitrarily to provide a unique name for various steels. Numbers in the grade designation indicate the minimum yield strength of the steel in thousand psi. API defines the yield strength as the tensile stress required to produce a specific total elongation per unit length on a standard test specimen Table source: Heriot watt Drilling Engineering Handbook
  13. 13.  T&C – Threaded and Coupled  LT&C – Long Thread and Coupled  ST&C – Short Thread and Coupled  BTC – Buttress Thread  Integral Connection  External Offset  Internal Offset  None Upset  Extreme Line Connection Source:API 5CT Manual
  14. 14. Threaded and Coupled Integral Connector Integral joint tubing has external thread at on end and internal thread at the other end. This oil pipe can be connected without the use of couplings. The threaded and coupled has a coupling which is box by box ready for make up for two joints
  15. 15. EU or external upset strong connection, full opening, clearance problems IU or internal upset – moderately strong connection, reduced opening, good external clearance NU or non-upset – weak connection, full opening, good external clearance
  16. 16. Black Crest Full Crest Seal Nose Seal Shoulder
  17. 17. SIMILARITY -Both connection have same number of black crest -They are both Designed with higher sealing capability. -They are both used in areas with sour Gas. DIFFERENCE DIFFERENCE -The FGL has double seal nose -Seal Nose stand at Angel 90° -silent start off and silent run off -6 TPI -broader seal nose -SLHT has a single seal nose -seal nose bevelled forward at 75° -Loud Start off and silent run off -10 TPI -Shorter seal nose
  18. 18.  SAFETY KIT  PIPE WRENCH  CHAIN THONG  DRIFT MANDREL  MEASURING TAPE/ DIGI-TALLY  WIRE BRUSH  CLEANING BRUSH  AIR COMPRESSOR/PRESSURE WASH  MAGNIFING LENS  THREAD COMB  THREAD GUAGE  RAGS  SOLVENT  TALLY SHEET  DRIFT CHART  THREAD COMPOUND  WHITE PAINT  RED PAINT  PAINT BRUSH
  19. 19.  Lay Out casings  Break Thread Protectors, Box and Pin.  Run Drift from Box to Pin with API 5CT Certified Drift Mandrel.  Use compressed air to blow casing from box to pin, in other to remove scales and debris.  Wash threads with Solvent and cleaning brush, and then use wire brush for washing threads with little rust.
  20. 20.  Clean threads with Rag or soft foam and allow to dry.  Inspect threads, Box and Pin by running your fingers round the threads gently with special concentration on seal in other to check for any possible damage.  Take measurement of casing and record on a tally sheet.  Mark casing that pass visual test with a white paint and red paint for the ones that fail test.  Apply Thread compound on threads and close with thread protectors.  Assemble tools with your tool checklist
  21. 21. Galled thread Pitting on thread Flag off Damaged thread
  22. 22. Drifting or Rabbit involves running a drift mandrel from the box end of a casing or tubular, to check for any 1. possible restriction 2. Rusty Flakes that has occurred as a result of internal corrosion A restriction means that the original shape of pipe has been altered and therefore will not be suitable for purpose. In visual inspection, it is suitable to use:  Full Drift  End Drift
  23. 23. Photo Credit: Symetec Steel
  24. 24.  Galling in connection  Improper Make-up (misalignment, dirt, Over thronging, too little lubrication).  Fatigue Cracking  Corrosion
  25. 25. THE END

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