89mm Center Cable Measure While Drilling Drill Pipe Mwd Drill Pipe

89mm Center cable Measure While Drilling drill pipe MWD drill pipeMWD directional drill pipeModular Electrically Connected Cable Assembly , with a communication channel (inside cable) is designed for horizontal directional drilling using a telemetry system. It was designed for deep hole wire line applications, with its strong tool joints, high quality friction-welded and special heat treated steel, the rods are excel in directional drilling applications. Φ73mm and Φ70mm MECCA drill rod have maximum working torque of 6000N·m and have excess to accomplish in-seam directional borehole up to 1000 meters. While, Φ89mm rod has a maximum working torque of 12000N·m and are suitable to drill borehole depth up to 2000 meters. The rods allow the driller to receive real time survey data, including directional drill data and sampling data of drilled formation.Features and advantages of MWD directional drill pipe are as follows (1) Strong tool joints and flexible mid body. (2) Welded tool joints of specially heat treated steel with very high mechanical resistance. (3) Optimum concentricity can be achieved through superior friction-welding process and weld inspection (4) Increased couple outside diameter allows thread have strong strength (5) Special designed cone trapezoidal thread connection increased thread root area and strength (6) Increased contact area and concentricity of the thread connection lead to high resistance as to torque & extension and excellent seal performance (7) NC lathe manufacturing ensures machining precision of thread  MWD Drill Pipe Scope of application:While drilling survey drill pipe is generally required to be constructed in a complete coal seam (f ≥ 1) or a stable rock stratum (f ≤ 6); it is mainly used for the construction of gas drainage borehole and water exploration borehole in short horizontal and long-distance underground coal mine, and also used for the construction of directional borehole such as ground and tunnel near horizontal engineering borehole.MWD Drill Pipe Product features:1.The drill pipe body is welded by friction welding process, with good mechanical properties and long service life. 2.High thread strength and good adhesion resistance of drill pipe joint. 3.A signal transmission device is designed inside the drill pipe, which can realize the two-way real-time communication between the bottom measurement probe pipe and the explosion-proof computer of the hole, and the transmission efficiency is high. 4.The inner pipe and joint of drill pipe have good sealing performance and high drill pipe stability protection cap shall be worn in time to keep the inside of the drill pipe clean and prevent dirt such as coal dust from entering the polluted steel joint;   Spec(mm)Outer diameterLengthStress toleranceConductor resistanceInsulation resistanceRecommended rig torque (N.m)Recommended bit size (mm)RodJointPriorityAlternativeΦ7573753000102M6000Φ96Φ98Φ8989913000102M12000Φ113   No Dia. Length Insulation connector resistance Cable conductor resistance Water pressure Shape Steel Grade 1 φ70mm 1500~3000mm ≥500MΩ 0.5~1.5Ω 7~10Mpa Round face type, groove type       G105, S135 2 φ73mm 1500~3000mm ≥500MΩ 0.5~1.5Ω 7~10Mpa 3 φ76mm 1500~3000mm ≥500MΩ 0.5~1.5Ω 7~10Mpa 4 φ89mm 1500~3000mm ≥500MΩ 0.5~1.5Ω 7~10Mpa   The  drill pipe is mainly used in the directional horizontal drilling in the coal mine roadway. It is used together with the orifice display equipment to display the drilling track data in real time. The operator can adjust the direction of the drilling track according to the displayed data in time, so as to achieve the purpose of directional drilling. It is widely used in directional drilling control of geological, coal, oil, water conservancy and other industries.The Φ73 center cable type directional drill pipe is generally required to be constructed in a complete coal seam (f ≥ 1) or a stable rock stratum (f ≤ 6); it is mainly used for the construction of short horizontal and long-distance gas drainage borehole and water exploration borehole in the coal mine, as well as the construction of Directional Borehole in the ground and tunnel near horizontal engineering.MWD Drill Pipe Precautions:Before using the drill pipe, check whether the plastic joint of the drill pipe is loose, deformed or cracked to ensure that the sealing ring of the plastic joint is intact, the drill pipe thread, plastic joint and steel joint are clean, and the reducing spring is firm and reliable;Before connecting the drill pipe, the thread grease must be applied on the thread surface of the drill pipe joint, and the special lubricating grease for the wireline drill pipe must be applied on the sealing ring of the plastic male joint. Control the make-up speed ≤ 25R / min in the process of connecting the drill pipe;During drilling construction, the drilling track shall be kept smooth to avoid large corners. The bending strength of borehole inclination angle is controlled at 3 ° /