Horizontal Directional Drilling mighty D130x150 show extraordinary strength
Project name: Tianjin Electric Power Pipe laying works
Construction unit: Power Engineering Co., Ltd. Tianjin Rui
Construction Location: Tianjin Ping South Road
Use of equipment: Machinery Manufacturing Co., Ltd. Beijing mighty D130x150 Horizontal Directional Drilling, DCI Eclipse locator company, the U.S. high HYDRAUL-EZ Czech bentonite
Mighty Horizontal Directional Drilling diagram Project Overview: 2009 Power Engineering Co., Ltd. in Tianjin Rui Ping South Road in Tianjin, the successful completion of 95 meters, 18 D200PE D110PE pipe and two pipe laying, they continue to write for a mighty D130x150 construction Horizontal Directional Drilling records.
1, site characteristics Friendship Road Construction located at the intersection of peace Southern Road T-junction. Taking into account pipeline placement and Friendship Road is the principal roads will be traffic control delay greater impact and, therefore, put the figure pipeline B Department, while the A Division, as the construction of drill entrance, which is about 95 meters away from AB. Import and export of construction and equipment and construction in the middle of the road green belt, so the traffic impact is not significant. The information in the shallow underground cables and some other lines, little effect on the construction. One meter rig to the left there is a power transformer, electromagnetic radiation have little effect on the positioning system, can be ignored.
2, soil characteristics Tianjin saline soil are generally of loam, the soil is dark gray Construction Department, the soil is quite soft and associated with plant roots.
3, the basic situation of project
Rig using the mighty Machine Manufacturing Co., Ltd. Beijing (VBM) production VermeerNavigatorD130x150 Horizontal Directional Drill, bentonite for the Czech Republic high HYDRAUL-EZ Easy bentonite drilling, drilling fluid ratio 25kg/m3, that is a bag of bentonite with one cubic meter of water. The pipeline for the power shop channel, porous 18 200mm to 110mm PE pipe and two of the PE pipe. Estimated construction time of six days, construction length of about 95 meters, the final hole diameter required 1300mm.
4, the construction process The relatively soft soil engineering, driven into the hole the hole is easier to use DCI the Eclipse wireless positioning system, into the drilling point to 25%, about 1.5 hours to complete the construction of pilot hole. Back to the diffusion process for 5 minutes, start with the beginning of expansion of 600mm, and then press 750mm, 900mm, 1150mm, 1300mm five levels increased reaming, using recessed cutting back expansion compression head, mud flows between the 80-90gpm . Because it is soft clay, into a hole high, it expanded in the first class back to back on the use of a 600mm extension header. In the first stage of the back diffusion process, the torque remained at 3500psi (14866Nm), back drag will keep the 1000psi (11804kg) to return to expansion, six and a half hours after the first class back to the successful expansion. Back after the expansion process is to maintain torque at 3500psi and 1000psi drag force of the return back to expand.
As construction site constraints, the pipeline back to drag did not put up with fixed pulley towed pipe, the pipe's entrance using a Crane And a Excavator By the crane lifted 15 meters from the entrance, excavators at the entrance of the pipe under pressure, so be buried point to 25%, and 1300mm in the pipeline with compressed before cutting back to back expansion of the first secondary delayed. Just be buried in the pipeline when the drag force back to only a 1000psi (11804kg). Three hours later, pipe emitting mud flat, dragged back to PE pipe, the end back to the peak drag force 4000psi (47216kg), accounted for the largest rig drag force back to 80%, thanks to the mighty hydraulic drilling rig in good imports pipeline system and excellent design, dragging the whole process back to steady speed, the actual delay time is only 60 minutes tube, the average rate of return drag 16m/min. Then the whole project is also nearing completion.
5, lessons learned Across the entire project time 6 days, while the rig's total working time of 28 hours. Actual working time from the machine reflects the level of directional drill the extraordinary mighty strength, which works on the need for 6 days across the main reasons for relatively narrow construction site restrictions, not set slurry recovery system works in the mud must be use tanker towed away, the addition of treatment to compare the construction site far from the resulted slurry overflow project was forced to suspend. In addition, more rain during the construction of Tianjin, it took only 6 days duration.
D130x150 used in this construction Horizontal Directional Drilling Machinery Manufacturing Co., Ltd., Beijing mighty design and production of new models of drilling, this new design combines large-scale drilling rig design and high efficiency, flexibility, transportability in 1, with one full self-contained design, high degree of automation in the construction of the extraordinary strength of their full access to the customer greatly appreciated!
Ongoing expansion of the D130 the last time back
1300mm back to the first expansion of PE pipe with a 18
Pipeline be buried instantly Successfully dragged back
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