Atlas Copco Exploration Products. Assembly manual. NV3 conventional triple tube core barrel

Transcription

1 Atlas Copco Exploration Products Assembly manual NV3 conventional triple tube core barrel

2 Contents NV3 conventional core barrel assembly manual Head Assembly 2 Inner Tube Assembly 9 Outer Tube Assembly 13 Final Core Barrel Assembly 15 Parts List - NV3 Conventional Core Barrel 17 Part Board - NV3 Conventional Core Barrel 18 Component Descriptions 19 Manual Appendices 27

3 ASSEMBLING SAFETY Special Safety Signs In the assembly manual, you may come across the following warning signs. The DANGER sign warns for immediate hazards, which, when ignored, will inevitably cause serious personal injury or death! The Warning sign warns for hazards or unsafe practice which, when ignored, could lead to serious personal injury or death. The CAUTION sign indicates hazards or unsafe practice, which could lead to minor injury or damage to equipment. The IMPORTANT sign is used for recommendations such as how to assembling the components efficiently and in compliance with environmental regulations. Use approved spare parts only. Any damage or malfunction that can be attributed to the use of unauthorized spare parts is not covered by the warranty and invalidates product liability. Also observe the following general safety instructions: Always use proper protective equipment while assembling the components of the core barrel. Always use proper tools while assembling the components of the core barrel. NOTE: Throughout this assembly manual, the use of grease is mentioned. Please assure that the use of petroleum based grease is not prohibited in the area of the world where these assemblies will be used. Contact your Atlas Copco representative for lubricant alternatives. 1

4 Head Assembly The purpose of the Head Assembly is to connect the Core Barrel to the Drill String, and allow the Inner Tube to remain stationary so that it may receive core. The rest of the Core Barrel rotates to drive the Reaming Shell and Bit. NOTE: Throughout this assembly manual, the use of grease is mentioned. Please assure that the use of petroleum based grease is not prohibited in the area of the world where these assemblies will be used. Contact your Atlas Copco representative for lubricant alternatives. Thread the Lock Nut (Item 2) onto the Spindle (Item 3). Be certain that the numbered side of the Lock Nut (Item 2) is facing down when threaded onto the Spindle (Item 3). 2

5 Place the Spindle (Item 3) in the vice, and alternate the two Shut Off Valves (Item 4) with the two Adjusting Washers (Item 5) in the following order: Shut Off Valves (Item 4) Adjusting Washers (Item 5) Shut Off Valves (Item 4) Adjusting Washers (Item 5) Place the Thrust Bearing (Item 6) on the Spindle (Item 3) so it comes to rest with the moving side down against the Adjusting Washer (Item 5). Place the Spindle Bearing (Item 7) on the Spindle (Item 3). It will sit over top of the Thrust Bearing (Item 6) with the threads facing up towards the threads of the Spindle (Item 3). 3

6 Install the Hanger Bearing (Item 8) on the Spindle (Item 3) with the open balled end of the Hanger Bearing (Item 8) facing up towards the threads of the Spindle (Item 3). Now place the Compression Spring (Item 9) onto the Spindle (Item 3) so it rests on the Hanger Bearing (Item 8). The Lock Nut (Item 10) is now threaded onto the Spindle (Item 3) and tightened with an adjustable wrench until it is snug against the Compression Spring (Item 9). Do NOT overtighten and compress the Compression Spring (Item 9). This will cause a preload on the Shut Off Valves (Item 4) and a blocked Inner Tube (Item 15) will be prematurely indicated by the water pressure. 4

7 Insert the Grease Fitting or zerk (Item 12) into the grease fitting socket on the Inner Tube Cap Assembly (Item 11) and tighten with the appropriate sized socket and ratchet. Place the Ball (Item 13) in the open end of the Inner Tube Cap Assembly (Item 11). Thread the Check Valve Body (Item 14) into the Inner Tube Cap Assembly (Item 11) and tighten using an adjustable wrench until wrench tight. 5

8 Place the Inner Tube Cap Assembly (Item 11) on the Spindle (Item 3) and thread it to the Spindle Bearing (Item 7). Fill the Inner Tube Cap Assembly (Item 11) with grease, via the Grease Fitting (Item 12). Now take the newly assembled Bearing Assembly and thread it to the Head (Item 1). 6

9 Thread the Lock Nut (Item 2) so that it buts against the Head (Item 1). Be certain not to tighten the Lock Nut (Item 2) too much as you may have to make adjustments to it later. The Head Assembly is now complete. 7

10 Inner Tube Assembly The purpose of the Inner Tube Assembly is to transport core samples. While drilling, the Inner Tube Assembly houses and retains the core and while retrieving, the Inner Tube Assembly protects and transports the core. If the Inner Tube becomes blocked with core, the Inner Tube will put pressure on the Shut Off Valves. This will compress the Shut Off Valves which will shut off the water flow. The increased water pressure will be the signal the drill operator that the tube is blocked. Use proper personal protective equipment and proper tools. Avoid the pinch point. Secure the Inner Tube (Item 15) in place so it will not move. Be careful not to distort or dent the Inner Tube when securing it in the vice. 8

11 Place the Core Lifter (Item 17) inside of the Core Lifter Case (Item 18), it should drop right in. Now, slide the stop ring (Item 16) inside of the Core Lifter Case (Item 18) until it is seated in the designated groove, behind the core spring. Check to see if the core spring can move freely inside the Core Lifter Case (Item 18). If this is so, all is well. 9

12 Thread the Core Lifter Case (Item 18) to the pin end of the Inner Tube (Item 15). Be sure to tighten the Core Lifter Case with the Inner Tube Wrench until it s wrench tight. Now proceed to insert the Split Tube (Item 19) into the open end of the Inner Tube (Item 20). Be certain that the Split Tube (Item 19) forms a cylinder when inside the Inner Tube (Item 20). Be certain that the O-Ring (Item 17) is secure on the groove located on the Piston (Item 18). 10

13 Take the Piston (Item 18), and put it inside the Split Tube (Item 19). NOTE: Make sure to apply pressure to the Piston (Item 18) so that there is a tight seal to the Split Tube (Item 19). At this point, secure the Head Assembly to the pin end of the Inner Tube (Item 15). Apply grease to the threads and thread the Bearing Assembly. Be sure to tighten the Bearing Assembly using the Inner Tube Wrench until it is wrench tight. The Inner Tube Assembly is now complete. 11

14 When attempting to release the Piston (Item 32) from the Split Tube (Item 33), thread the Piston Plug (Item 30) into the center hole of the Piston (Item 32) and pull. NOTE: Some force may be required to pull the Piston (Item 32) from the Split Tube (Item 33). When attempting to retrieve core the drill operator will remove the Head Assembly from the Inner Tube (Item 34). The operator will then thread the Piston Plug (Item 30) into the open box end of the Piston (Item 32) This will be followed by threading the Adapter (Item 29) to the exposed end of the Inner Tube (Item 34). The operator will then remove the Core Lifter Case (Item 37) and connect the pump out hose to the open end of the Adapter (Item 29). When the operator is satisfied with the connection the water supply will be opened. The force caused by the water pressure will push the Split Tube (Item 33) from the Inner Tube (Item 34). The operator will then remove the one half of the Split Tube (Item 33) and retrieve the core sample. 12

15 Outer Tube Assembly The purpose of the Outer Tube Assembly is to connect the Bit and Shell to the drill rod string. It houses and secures the Inner Tube Assembly during drilling operations and shipping. Use proper personal protective equipment and proper tools. Avoid the pinch point Before beginning to assemble any pieces of the core barrel, always ensure that the threads of each individual piece are free of dirt and grit. Wipe all threads down when assembling and disassembling. This will ensure individual pieces fit together properly and will also help to avoid any damage to pieces. Safety glasses should be worn at all times. Following the steps outlined in this manual will help to ensure the optimum and safest usage of the core barrel. 13

16 Place the Thread Protector (Item 21), threaded end up on the bench and insert the Inner Tube Stabilizer (Item 20). This should drop in and seat itself on the shoulder. The Thread Protector (Item 21) is now ready to be threaded onto the Outer Tube (Item 19). Be certain to tighten this using the Outer Tube Wrench until it is wrench tight. The Outer Tube Assembly is now complete. 14

17 Final Core Barrel Assembly The purpose of the Final Core Barrel Assembly is to connect the Inner Tube Assembly with the Outer Tube Assembly, and there by resulting a finished product. Place the Outer Tube (Item 19) in a vice. Insert the Inner Tube Assembly, Core Lifter Case (Item 18) first, into the Outer Tube Assembly. 15

18 Thread the Head (Item 1) to the box end of the Outer Tube (Item 19). With the Coring Bit properly installed onto the Outer Tube (Item 19) and the Inner Tube Assembly (Item 11) threaded to the Outer Tube (Item 19), the operator will measure the gap between the inside shoulder of the Coring Bit and the Core Lifter Case (Item 18). There should be a distance of 1/8 to 3/16. If the measurement is off the Inner Tube Assembly must be removed from the Outer Tube (Item 19) Using proper tools, the operator will loosen the Lock Nut (Item 2) and proceed with the proper adjustments turning the Bearing Assembly clockwise or counter clockwise into the Head (Item 1). Once satisfied with the adjustment, the operator will tighten the Lock Nut (Item 2) against the Head (Item 1). The operator should take note and record the distance between the Head (Item 1) and the Inner Tube Cap Assembly (Item 11). This measurement can be used to adjust other Inner Tube Assembly s. The Final Core Barrel Assembly is now complete. 16

19 Conventional Triple Tube Core Barrel NV3 Ref. Description Qty. Part Number m / 5 ft Core barrel assembly m / 10 ft Core barrel assembly Head assembly Head Lock nut Spindle Shut-off valve Valve adjusting washer Thrust bearing Spindle bearing Hanger bearing Compression spring Lock nut Inner tube cap assembly Grease fitting Ball Check valve body Adapter Piston plug O-ring Piston m / 5 ft Split tube m / 10 ft Split tube m / 5 ft Inner tube m / 10 ft Inner tube Stop ring Core lifter Core lifter case m / 5 ft Outer tube m / 10 ft Outer tube Inner tube stabilizer Thread protector (For shipping/ handling purposes) 17

20 Part Board - NV3 Conventional Triple Tube Core Barrel 18

21 Component Descriptions 1. Head The Head simultaneously connects the drill string to the Inner Tube, Spindle and the Outer Tube. The Head also assists in stabilizing the upper end of the Core Barrel via the hard surfacing strips. 2. Lock Nut The Lock Nut is responsible for locking the Spindle into the Head as well as securing the length of the Inner Tube so that the Core Lifter is the correct distance from the seat of the bit. 19

22 The Spindle is the link for all of the Head Assembly components. It is on its axis that the Bearings, the Valves, Compression Springs, Lock Nut, Head and the Inner Tube Cap are installed. 3. Spindle Commonly called The Rubbers, the Shut-off Valves are made of a special compressible rubber or nylon. The Shut-off Valves are sandwiched between the Adjusting Washers. The role of the two Shut-off Valves are to restrict water flow to the coring bit while rock is exerting pressure inside the Inner Tube during the drilling cycle. This alerts the operator of a potential core block or filled tube. This force compresses the two Rubbers restricting water flow to the coring bit. This results in an increase of water pressure. 4. Shut-off Valve Note: Set of 2 The Adjusting Washers are positioned on the Spindle. The first one sits next to the first Shut-off Valve while the second is located next to the second Shut-off Valve. The role of the Adjusting Washer is to adjust the sensitivity of the valve to restrict water flow to the coring bit. 5. Adjusting Washer Note: Set of 2 20

23 6. Thrust Bearing The Thrust Bearing is a mechanical unit assembly that allows free rotation of the lower part of the Inner Tube Assembly. It is located right below the lowest Valve Adjusting Washer, immediately behind the Spindle Bearing. Note: The moving part of the Thrust Bearing is always facing away from the Spindle Bearing. 7. Spindle Bearing The Spindle Bearing slides onto the Spindle and houses the Thrust Bearing. It separates the Hanger Bearing from the Thrust Bearing and connects the Bearing Assembly to the Inner Tube Cap. 8. Hanger Bearing The Hanger Bearing fits onto the Spindle below the Spindle Bearing. It consists of three parts being two washers and an open balled section in the middle. 21

24 The Compression Spring is enclosed inside the Inner Tube Cap that is fitted onto the Spindle Assembly. The Compression Spring is located immediately below the Hanger Bearing. While breaking the core at the end of the core run, the Core Lifter Assembly will contact with the inside bevel shoulder in the throat of the core bit. Compression of the Compression Spring will transfer forces onto the Outer Tube and rod string aiding the breakage of the rock right below the core Lifter Case. 9. Compression Spring The Lock Nut threads onto the Spindle shaft securing the Compression Spring and the Hanger Bearing against the Spindle Bearing. 10. Lock Nut The Inner Tube Cap is screwed onto the Spindle Assembly and protects the Compression Spring and Bearings. A Grease Fitting permits insertion of the grease inside the Inner Tube Cap. 11. Inner Tube Cap Assembly 22

25 12. Grease Fitting (zerk) The Grease Fitting or Zerk allows grease to be inserted into the Inner Tube Cap Assembly. 13. Ball While drilling, the Ball will seal the waterway, preventing any water pressure from entering the Inner Tube. This aids the upward movement of the core inside the Inner Tube. 14. Check Valve Body The Check Valve Body holds the ball, and connects to the lower inner tube side of the Inner Tube Cap. 23

26 The Adapter is a metal structure that is threaded on to the Inner Tube during core retrieval. When in use, the Adapter connects to a water supply. When the water supply is opened the pressure built in the Inner Tube pushes against the piston and forces the Split Tube from it. The drill operator can then retrieve the core sample from the Split Tube. 15. Adapter The Piston Plug is a specially designed eye bolt that is threaded into the box end of the Piston. The Piston Plug is inserted during core retrieval. The Piston Plug helps build water pressure in the Inner Tube by blocking the possible exit in the Piston. The Piston Plug also helps in the retrieval of the Piston. 16. Piston Plug The O-Ring is a rubber piece that is fitted on the groove of the Piston. The O-Ring assists the Piston in keeping a tight seal to the Split Tube. 17. O-Ring 24

27 18. Piston The Piston is a specially designed piece that fits inside the Split Tube. When water pressure is applied the Piston forces the Split Tube out of the Inner Tube allowing easy removal of badly broken, or soft expanding type core. 19. Split Tube The Split Tube consists of two half tubes that, when fitted together, are placed inside the Inner Tube. The Split Tube is designed for easy retrieval of the core sample. When the Split Tube is pumped out of the Inner Tube, the drill operator will remove the upper portion of the Split Tube revealing the core sample. 15. Inner Tube The Inner Tube is a steel tube threaded on the outside (pin thread) at both ends. It serves the purpose of collecting the core samples. Note: In some cases as in O2 style, box and pin will be on the Inner Tube. 25

28 The Stop Ring is part of the Core Lifter Assembly. The Stop Ring is inserted inside of the Core Lifter Case after the Core Lifter. The Stop Ring then locks into a groove located inside of the Core Lifter Case. When the Stop Ring is locked into position it will prevent the Core Lifter from sliding up inside of the Inner Tube. 16. Stop Ring The Core Lifter travels within the Core Lifter Case allowing the core to move smoothly into the Inner Tube. As the core run is completed, or if the rock sample is blocked anywhere inside the Inner Tube the operator, after stopping the rotation of the drill string, will lift the rod string from the bottom of the hole. This action will slide and tighten the Core Lifter onto the core sample due to its beveled design. A pressure is caused because of this and then it s exerted on the core allowing the core to break before it slips out. The N3 style Core Lifter has three lines engraved on the outer shell. 17. Core Lifter The Core Lifter Case carries the Core Lifter and Stop Ring. The bevel on the inside of the Core Lifter Case and the outside of the Core Lifter allows the core to enter. When the Inner Tube is raised, the core is locked in place which allows the core to be broken off from the bottom of the hole. The core is then held in the Inner Tube during retrieval. 18. Core Lifter Case 26

29 19. Outer Tube The Outer Tube houses the Reaming Shell, Inner Tube Stabilizer, Core Bit and Inner Tube Assembly. The Outer Tube, due to its rigidity, is a very important part of the drilling equipment. Different types of Outer Tube are offered to the market depending on the ground conditions. 20. Inner Tube Stabilizer The Inner Tube Stabilizer plays two important roles. It aligns and stabilizes the Inner Tube inside the Reaming Shell, and allows the drilling fluid to flow freely toward the Coring Bit. 21. Thread Protector The Thread Protector serves to protect the pin end thread of the Outer Tube Assembly. It is part of the assembly when a Core Barrel is being shipped to any distributor or end user client. It is a good practice to use the Thread Protector whenever the Core Barrel is stored or in transit between drill projects. The Thread Protector also houses the Inner Tube Stabilizer for shipping. 27

30 Manual Appendices Wrench Tight Refers to how tight you should secure different components. Meaning to not overtighten but ensure that the components are securely threaded together. Grease All grease used through out the assembly process is recommended by Atlas Copco to be: Shell Darina XL EP2 Grease 28

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32 North Bay, Canada, October 2008 Copyright 2008, Atlas Copco Exploration Products, North Bay, Canada. Any unauthorized use or copying of the contents or any part thereof is prohibited. This applies in particular to trademarks, model denominations, part numbers and drawings. Illustrations and photos in this brochure may show equipment with optional extras. Specifications and equipment subjects to change without notice. Consult your Atlas Copco Customer Center for specific information. Atlas Copco Geotechnical Drilling and Exploration