Deep Hole Directional Drilling Rig Zdy12000ld

[Introduction]As a new technology in engineering field, underground directional drilling technology of coal mine has been widely used in borehole drilling in gas drainage, water hazard control, geological exploration and accurate drilling fields. ZDY12000LD directional drilling rig, mud pulse transmission MWD system, assorted drilling tools and combined directional drilling technique are developed to solve current technical limitation of direction drilling. The whole set of equipment appears significant advantages. These advantages include enlarged power, high borehole accident handing capacity and high wireless MWD accuracy. Meanwhile, less drilling cutting and small borehole curvature are expected to generate by combined directional drilling technique. The ZDY12000LD drilling rig have completed the ultra-long directional drilling along the coal seam with the main hole depth of 3353m in Baode coal mine, which has once again set a new world record of directional drilling in China.[Components of directional drilling system]1.Drilling rigZDY12000LD is a directional drilling rig with high rotary torque (the rated torque is 12000N.m), low rotary speed (range from 50r/m to 150r/m). The rig is capable for precise directional drilling operations with borehole depths of up to 1500m by using a downhole motor. It is suitable to drill large diameter underground borehole. The application of the rig includes directional drilling operations for gas drainage, water detection/drainage, grout injection, exploration of geological structure, detection of seam thickness, water injection in seam, etc. Technical parameters are listed in following table.Some special features/benefits on the rig are:(1) Magnificent power and drill abilityAs far as we know, ZDY12000LD drill rig has the highest rated torque in underground series drill rigs. Magnificent torque not only lead to the strong borehole drilling ability but also can maintain outstanding ability to avoid downhole accident. It can meet the requirement of rotary drilling technique, downhole motor drilling technique and integrated drilling technique (mix rotary drilling with downhole drilling) with relative high drilling efficiency.(2) Advanced hydraulic systemWith the use of high quality hydraulic components(Rexroth and Sauer), the rig has a reliable hydraulic. Chuck and clamp can be operated independently which lead to flexible and reliable control. Drill rod deployed handle are special designed to protect drill rod screws during connect and discharge process. Linkage system and optimized pressure/flow rate control lead to simple operation.2. Mud pump crawlerBLY390/12 mud pump crawler is a hydraulic pump crawler with large flow rate (the max flow rate is 390l/min) and high mud pressure (rated pressure is 12Mpa). The rig can maintain enough flow rate under high pressure work situation. It can supply enough hydraulic fluid power for downhole motor operation and drill cut remove to meet the requirement of long depth directional borehole drilling.3. Downhole assemblyTypical downhole assembly include several drill tools packages:(1) Φ98mm directional drill bit, Φ73mm downhole motor, cable transmission MWD system and Φ73mm cable-transmission drill rod. The assembly is suitable for long distance directional borehole drilling in coal seam.(2) Φ98mm directional drill bit, Φ73mm downhole motor, mud pulse transmission MWD system and Φ73mm cable-free drill rod. The assembly is suitable for long distance directional borehole drilling in coal seam.(3) Φ120mm directional drill bit, Φ89mm downhole motor, cable transmission MWD system and Φ89mm cable-transmission drill rod. The assembly is suitable to drill pilot hole for long distance directional borehole drilling in roof and coal seam.(4) Φ98mm-Φ120mm reamer drill bit, and Φ73mm cable-transmission drill rod/Φ73mm cable-free drill rod. These tools are used to expand borehole for large diameter directional borehole drilling in coal seam.(5) Φ120mm-Φ153mm reamer drill bit, Φ89mm cable-transmission drill rod/Φ89mm cable-free drill rod. These tools are used to expand borehole for large diameter directional borehole drilling in roof.(6) Φ133mm-Φ98mm-Φ82mm fishing drill bit, Φ102mm fishing string. These tools are used to fish Φ73mm downhole assembly.(7) Φ146mm-Φ120mm-Φ100mm fishing drill bit, Φ127mm fishing string. These tools are used to fish Φ73mm downhole assembly.[Technical specification]TypeZDY12000LDRated torque/N • m12000~3500Rated speed/(r/min)50~170Brake torque/N • m2000Borehole depth/m1500Rod diameter/mm73/89/102/127Dip of the main axis/°-10~20Horizontal drill height/m1.3Max feed/pull force/kN250/250Feed/pull stroke/mm1200Power/kW132Max travelling speed/(km/h)2.2Max gradeability/°15Weight/kg9000Dimension(L×W×H)/m4.20×1.60×1.90[Patent certificate][Highlights and advantages]         1.Compact structure and suitable for a variety of drilling technologyThe compact structure design of the rig makes it possible to effectively solve the problem