Types of drilling rigs pdf

Mini rigs have: a torque less than 35kNm, a multi-directional drilling capability and typically the process involves adding and removing drill rods, tubes, casing or augers, which are normally B-Jack-up. This mobile drilling rig is designed to operate in shallow water, generally less than 350 ft deep. Jack-up rigs, are very stable drilling platforms because they rest on the seabed and are not. subjected to the heaving hull which may be shipshaped, triangular, rectangular, or irregularly. When the rig is undertow to a drilling Drilling Site preparation and water supply required. Small sample size. Slow. Expensive Maximum geological information. Uncontaminated high quality sample. Accurate hole positioning High quality sampling to greater than 1000km. Geological understanding Diamond Large heavy rig. No structural data. Possible sample contamination below water table Onshore and Offshore Drilling Rigs Types of Oil Rigs - Land Rigs The sequence of operations is as follows when a land well is drilled: Prepare location before rig arrives. Dig cellar Install conductor pipe Prepare support pad for rig, camp, etc Build roads, fencing, dig pits Sometimes drill water well. Move rig on to location, rig up and prepare to start drilling. Following are the types of drill bits: Flat drill Straight fluted drill Twist drill Double fluted drill Multi-fluted drill Centre drill Countersinking drill Counter boring drill Oil hole or tube drill Spirec drill Shell drill Step drill Installer bit Masonry Drill Rivet Drill Auger Drill Tile bits Hammer bit Glass bit Forstner bit Hole saw Types of Drilling Machines. According to the structure and application, Drilling Machines can be classified into seven types: Portable drilling machine. Bench drilling machine. Pillar drilling machine. Radial drilling machine. Gang drilling machine. Multi-spindle drilling machine. Deep hole drilling machine. Outline of Rotary Drilling Method 3. Offshore Drilling Structures 3.1. Technical Features of Offshore Drilling 3.2. Mobile Bottom-supported Rigs 3.2.1. Jack-up Drilling Rigs (Jack-up Rigs, Self-elevating Drilling Rigs) 3.2.2. Submersible Drilling Rigs (Submersible Rigs, Swamp Barges) 3.2.3. Tender-Assisted Platforms and Tenders 3.3. The first Oilwell Drilling module covers basic oil and gas well drilling principles. Different types of drilling rigs are presented, the difference between a kelly/rotary table and a top drive system is explained, and the components of a drill string are described in detail. Classification of Rock Drills 4.1. Percussion Rock Drills 4.1.1. Hand-held Rock Drills (Pneumatic) 4.1.2 Drifter 4.1.3. DTH 4.2. Rotary Drill 5. Applications of Drilling Equipment 5.1. Underground Mining 5.2. Surface Mining Acknowledgements Glossary Bibliography Biographical Sketch Summary Offshore drilling are divided into two types: Fixed structure types and Floating structure types. Jack-up Rig. This is a self-elevating rig, and is used for smaller, shallower offshore deposits. 2.5 Combination Rotary-Percussion Drilling Rigs 68 2.5.1 Truck Mounted Jetting-Driving 68 2.5.2 Walking Beam Jetting-Driving 71 2.5.3 Exploration Drill 75 2.5.4 Hydraulic Rotary-Driving 77 3. BIBLIOGRAPHY - REFERENCES - MANUFACTURERS OF RIGS AND EQUIPMENT 89 iii . LIST OF TABLES 1. Comparison of Low-Cost, Labor Intensive Drilling 2.1.3 Types of geological formation 19 2.2 Groundwater extraction 21 2.2.1 Advantages of drilled boreholes 22 2.2.2 Disadvantages of drilled boreh