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Core drilling method


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Core drilling method

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Core drilling method

  1. 1. core drilling method Safety Practice Compliance Procedure T10 Layne Christensen operates many different types and brands of drilling rigs and well service equipment. Each piece of equipment and work method has different procedures and safety practices. The following pages will outline the safe work practices for the barber drilling method. EQUIPMENT Coring is a method of drilling that uses a high speed rotating drill stem and barrel. The open end bit cuts a “core” of sample and allows it to be retrieved for logging and analysis. Many types of drills can be set up for coring operations. The following are specifically used for coring in Layne operations. n Longyear 34, 38, 44, 65 n CS1000, 1500, 4000 n Hagby/Onram 1000/2, 1000/3 n Joy 22 n CP50 n Boyles Dresser 25, 37 n Boyles Brothers 15, 80 n HC150 n Diamec 230, 251, 260 n Terramac 1000, 600 n UDR 1500 n JKS B30 SAFETY EQUIPMENT Certain safety equipment is required to be installed on all drill rigs. This includes: n Fire Extinguisher (Safety Practice B12) n Flashlight n First Aid/ Bloodborne Pathogen Kit n Emergency Reflective Road Triangles n Back-up Alarm n Visual Hazard Identification (Safety Practice B10) n Climbing Protection with full body harness (Safety Practice A5) n Functional Emergency Engine Kill Switch n Equipment required by environmental site specific health and safety plan (Safety Practice E2) n Back up alarm PERSONAL PROTECTIVE EQUIPMENT Each individual must have the following personal protective equipment: n Safety Glasses (Safety Practice A2) n Hard Hat (Safety Practice A1) n Safety Toed Shoes (Safety Practice A1) n Hearing Protection (Safety Practice A3) n Gloves (Safety Practice A1) n Proper Clothing (close fitting, long pants and shirts with sleeves) SITE PREPARATION AND START UP Prior to moving on the drill pad, adequate site clearing and leveling should be performed. Check the site for ground stability, overhead obstructions such as power lines or tree limbs, and ensure underground utility clearance has taken place. Large rigs and doghouses are often mounted on trailers. Caution should be exercised when maneuvering these into position. Ensure rigs, doghouses and pipe trailers are properly blocked and leveled to prevent shifting during drilling operations. In addition, any 11.07 1-T10
  2. 2. n Never consume alcohol or drugs prior to or while on the job. If taking over the counter medication, use the type that does not cause drowsiness. n Always operate the drill from the control platform. The operator should never leave the control panel while the drill is in operation. Ensure all drive and feed controls are in neutral when leaving the control platform and shut down the engine if leaving the work area. n POSITION THE DRILL SO IT IS IMPOSSIBLE FOR ANY PORTION OF THE EQUIPMENT TO COME WITHIN THE MINIMUM REQUIRED SAFE DISTANCE TO ENERGIZED LINES. Maintain at least 10 feet clearance of lines carrying 50,000 volts. One foot additional clearance is required for every additional 30,000 volts. If you do not know line voltage, ask the electric utility. All overhead lines should be considered energized. n Never operate the drill during electrical storms, high wind conditions or in poor light. n Clean mud and grease from your boots before mounting the drill platform or climbing the mast. Always use handholds and railings. When using a ladder, face the ladder and put both hands on the side rails. Always maintain “3-point” contact on the ladder. Do not try to climb while carrying tools. Use a bucket to raise and lower hand tools. Watch for slippery or uneven ground when dismounting. n “Horseplay” is never allowed on the job. n Wrench jaws should be periodically inspected and replaced if necessary. n Drill rods should not be held or lowered with pipe wrenches doghouse trailer or drill platform positioned adjacent to the rig should have minimum separation, and each platform should be level and at the same height. Any gaps should be covered with temporary decking to reduce tripping hazards. Before raising the mast, the rig must be stabilized with leveling jacks and/or solid cribbing. The drill should be leveled and ground stability checked if it settles after initial set up. Raise and lower the mast only when leveling jacks are down. Fasten the derrick extension or “stinger” with bolts and the pin prior to elevating the derrick. Have a crew member watch the mast as it is raised to observe for caught cables or other problems. Only operate the drill with the mast locked in the raised position. All personnel should be instructed to “stand clear” of the rig and in the operators sight immediately prior to starting the engine. Make sure all gear boxes are in neutral and all hydraulic levers are in non-actuating positions to prevent the table from moving while starting the engine. Start the engine according to the manufacturer’s guide. SAFETY DURING DRILLING OPERATIONS n Never attempt to operate the drill unless you are fully trained in its use. Do not allow unqualified persons to operate the drill, unless fully supervised as part of a training program. 11.07 2-T10
  3. 3. n Wire rope must be properly matched with each sheave. Too large and the rope will pinch, too small and the sheave will groove. Once a sheave is grooved, it will pinch and damage larger rope. n When stuck loads cannot be raised with the hoist disconnect the hoist line and connect the load directly to the feed mechanism. Do this only when the pipe is secured with a wrench or dog collar. Do not use the leveling jacks for added pull. n Minimize the shock to wire rope. Pull loads smoothly and steadily, especially in cold weather. Never use frozen ropes. n Protect wire rope from sharp corners and edges. Replace faulty guides and rollers. n All hooks must be the type with a safety latch. n Periodically inspect and lubricate cables and sheaves; and wire line cable clamps, thimble and spooling. n Know the safe working load of the equipment. Do not exceed the rated capacity of hooks, rings, slings, links, swivels, shackles, or other lifting devices. n When handling wire rope, always wear gloves. Do not guide rope on to hoist drums with your hands. Replace wire rope according to manufacturers specifications. When new rope is installed, first lift a light load to allow the rope to adjust. n Never leave an unattended load suspended in mid-air. n Keep hands and feet away from pinch points as slack is being taken up. Never ride a hoist line up the mast. n Never ride a hoist up the mast. n Follow Safety Practice B13 for safe and proper use to slings. n If a string of drill rod or core barrel is accidentally released into the hole, do not attempt to grab the falling rod or wire line with your hands or a wrench. n Do not use your hands to clean mud or drill fluid from the drill rod. A rag or rod wiper should be used. n Know all pinch points including break out wrench, drive head and core barrels. Color code all pinch points. Experienced employees should show new employees these places on the first day of work. n Stand clear when breaking bits and subs. n Mud pits should be fenced or taped off with CAUTION tape. n Laying down or adding pipe is a dangerous operation. Always use a sling or strap while handling pipe. Be sure bed stakes are in place before laying down pipe. Finally, watch your footing to prevent slips and avoid stepping between pipe to prevent smashed ankles. Stand to the side while tripping or tailing pipe. Never stand under the pipe or between the rig and pipe truck while tripping pipe. n Inspect and grease water swivel. Make sure of tie off. Do not service swivel with rods in rotation. n Make sure foot clamp jaws are in place. Keep tools and materials away from foot clamp. Always shut down the engine before servicing foot clamp. Keep bolts and nuts tightened and all moving parts lubricated. n Make sure the quill hose is not twisted, kinked or broken. Check wing nuts and spud fittings, water swivel fittings, and be sure whip checks are in place. WIRE ROPE AND SLING SAFETY n Most sheaves on rigs are stationary with a single part line. Never increase the number of sheaves, winch lines or line parts without consulting the drill manufacturer. 11.07 3-T10
  4. 4. n Use someone on the ground as a guide during loading, unloading and backing. Maintain sight of your spotter at all times. n Secure all tools and equipment prior to travel according to Safety Practice C3. Secure the mast properly in the rest. Never over tension the load line, or damage can result. n Ensure the weight of the drill is distributed to the center line of the trailer and so some of the load is transferred to the pulling vehicle. Secure the unit with adequate load binders or chains. n When traveling off-road, first walk the route of travel inspecting for depressions, stumps, gullies, ruts or other obstacles. n Inspect the drive train for loose or damaged bolts, nuts, studs, shafts and mountings after each shift. n Use caution when traveling side hill. Conservatively estimate the side-hill capability of the drill to include shifting loads. When possible, travel directly up or downhill. n Units using flotation tires should remember to bleed air to proper tire inflation before highway travel. Never exceed 60 mph as too much heat can be generated with high multi-ply tires. MAINTENANCE n Perform and document a pre-shift safety and maintenance inspection based on the Layne Job site Safety Audit and Vehicle Inspection forms. Perform preventative maintenance according to Safety Practice C4. TRAVEL, LOADING AND UNLOADING n Only properly qualified personnel should drive the drill rig. n Know all dimensions and weights of the equipment, especially the overhead clearance. Allow for mast overhang when approaching corners, other vehicles or structures. Be aware of service station and motel canopies. Watch for low hanging electrical lines, especially at entrances to drill and commercial sites. Be aware of increased height when the rig is transported by trailer. n Never operate the unit unless the brakes are in good working order. Perform a thorough pre-trip inspection, including brake inspection, prior to travel. Stop periodically along the route to inspect the truck and the load. n Insure the vehicle is never operated unless the brakes are in good working order. Perform a thorough brake inspection, including brake adjustment, if necessary, prior to travel. NOTE: Airbrake inspection and adjustment can only be performed by personnel who have completed training and received certification for airbrake inspection and adjustment. n Never travel with the mast raised or partially raised. n Remove the truck keys and chock the wheels when the vehicle is unattended or maintenance is being performed. n When loading or unloading the drill, use ramps of adequate design to carry the weight. Always load or unload on even ground. 11.07 4-T10
  5. 5. n If battery acid gets in your eyes or on your skin, flush immediately with large amounts of water and get medical attention. n When charging a battery, turn off the power source to the battery before connecting the charger. Cell caps should be loosened to allow escaping gas. n Never smoke while fueling. Equipment should be fueled with the engine and all electrical switches off. n Keep the fuel nozzle in contact with the tank to prevent static sparks. Keep hoses and containers in contact with metal during transport. n Flammable substances should only be carried in NFPA approved safety cans. n Follow Layne Safety Practice C2 when transporting more than 1,000 lbs of any fuel. n All rotating hazards, such as drive lines or fan belts, should be covered. Be sure to replace guards after maintenance. n Tires are the key to safe travel. Inspect tires for proper inflation. Also inspect for loose or missing wheel lugs, objects wedged between treads, abnormal wear, and cuts in the tire. Keep in mind it is not necessarily the tread on the tire, but the age and use history that can cause a blowout. n Always wear safety glasses or a face shield and use extreme caution when servicing batteries. Perform battery maintenance in a well ventilated area and never smoke while servicing batteries. During removal disconnect the ground clamp first. During installation, connect the ground clamp last. your safety is layne christensen’s number one conCern 11.07 5-T10