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800m deep freeze hole drilling test


Sticking incidents. After analysis, sticking three main reasons: ① severe weathering zone broken, Wall difficulties; ② then use the performance does not meet the protective wall of mud requirements; ③ operator inexperience, improper methods of operation. For sticking characteristics to the sweeping, grinding, punching a combination of methods to prevent the sticking of accidents happening again. 6 Some knowledge (1) 800m deep freeze hole drilling successfully tested, confirming the common cold injection rig, mud pump, deep drilling rigs to meet the construction needs; confirmed the choice of bottom hole assembly and construction process is reasonable; also shows that the company's construction technology has reached a deep hole construction requirements. (2) Test Drilling deflection rate of alluvial layer 144 ‰,ed hardy uk, the end (the switch 6) well construction technology 2001 22 convolution smaller XY-4 drilling rig hydraulic one thousand meters L, in the caliper ≠ 50m face arrangement of two, full-core drilling, footage 948m, Taiwan Note on drilling efficiency l3542m, duration 105d. Grouting YSH_250/120 type injection pump. Stage 2 short paragraphs deep in the grouting holes within 40m, with penetration rate faster K03100B type hole drill drill L. The small rig, installed, removed, it can face arranged in three sets,knock off oakleys, constructed on the average efficiency of Taiwan 16069m, duration 108d. Grouting selected in Japan HFV-C-type injection pump. 54 Note sac phase drilling results by the l note, basically proven the Ordovician limestone karst geology and hydrology, the initial formation of the grouting curtain grouting after the end of Phase 1, shaft excavation found that fewer cracks and sediment gushing cave does not appear, and some of the larger cave filled with sediment after the initial disclosure, no water or sediment in a small amount of seepage from, but soon changed by the gushing water seepage, and water yield more and more. The analysis that cave sediment in the grouting process can be squeezed,herve leger sale, the slurry can not be so cemented into the sediment within the cave as a whole. In order to achieve a certain effect of grouting the cave, for specific situations taken the following measures: First, the cave is filled with water or slurry of sediment displace the specific approach is that a pore pressure water or grouting,mulberry outlet, spacious open sand adjacent hole cave sediment drilling is done and then closed L grouting, filling the cave space; second hole density distribution, and increase the pressure grouting, pressure grouting through the sediment in the water will squeeze out, to form a certain thickness of sediment wall to stop water gushing, gushing water has not been a breakthrough in the rapid excavation of sediment prior to puzzle through the wall: As appropriate measures, Phase 2 grouting achieved the desired results, essentially blocking the cave gushing water, the shaft to create the conditions for safe and smooth construction. 6 Conclusion North River marsh deep main shaft face pre-Ordovician limestone aquifer grouting success, which lasted nearly a year's time. To April 1999, passed the shaft construction complex of Ordovician limestone aquifer: The construction of continuous exploration and practice, summed up some experience, especially in the more broken ground pre-grouting in the Ordovician limestone face how to use the KWS a sub-89-type only the pulp plug only the pulp, and how strong emission Ordovician limestone sediment water construction only the pulp mat, how to fully displace sediment within the cave and so made some progress, got some rules, such works for the future Construction of guiding significance. First author Wu S Hill (1964 a). Male. Ll senior engineer, graduated from the vertebrae 1985, Department of Geology, Southern School of Mines, the current children's three coal towel cut the total project handsome, leek Table 6 papers (on the next page 33) hole at 358% up to the national standard requirements. On the basis of past experience, if the further adoption of technical measures (such as into the motor to the development of new, changing to manual control for the electric brake control, constant pressure for fast drilling; further improve the orientation correcting means to improve the correction effect, etc.),mulberry bags uk, but also depth L will drop even lower skew rate. (3) selected according to different strata of different hardness of rock bit to help improve drilling speed, shorten the cycle into the hole. If the hardness of the right drill, 800m deep into the hole L can control the duration of less than 20d. (4) Special crushing and rock hard ground, use 190mm drill bit, with sweeping, grinding, drilling method impulse is to avoid sticking incident a better way. Complete formation and soft rock, with a ≠ 171.4IntI1 drill bit drilling, is still more sets of management and economy. (5) 800m deep drill test holes to freeze the success of our country to freeze the construction depth of the hole direct leap from the 435m to 800m, to fill the deep freeze over 500m of drilling L pore technology gaps, is the deep-freeze technology breakthrough pore L for our deep alluvium and large water content of coal overburden rock to create favorable conditions for development. Author Sui Wah (1952). Senior engineer. Huainan Mining Institute in 1978, graduated from the Department of Geology, 800m deep freeze hole drilling test items, head of H on f
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