News

  • Cold Dew

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  • Fracturing pump technology

    1、 Research status of fracturing pump technology in China Because China’s economy still lags behind those western developed countries, it is generally still in the stage and level of imitation and improvement on the basis of similar foreign products. Similarly, the fracturing technology an...
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  • National Day

    After a hundred years of wind and rain, the glory is still the same. Don’t forget your original heart and move forward dream by dream
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  • Brief introduction of four main factors affecting fatigue strength of welded joints

    1. Effect of stress concentration In welded structures, due to different stress concentrations at the joint, they have different adverse effects on the fatigue strength of the joint. ① Butt weld: the stress concentration is smaller than other types of joints, but the residual height is the same θ...
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  • 9.18

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  • Chinese teachers’ Day

    Teacher, you have worked hard.
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  • White Dew -Chinese 24 solar terms

    Bailu is the watershed between heat and cool. “Bailu” represents the end of summer heat. After entering the Bailu solar term, the summer wind is gradually replaced by the winter wind, and the cold air moves southward more frequently. In addition, the position where the sun shines dire...
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  • Multi-directional analysis of drilling holes for precast piles and drill pipes for cast-in-place piles

    According to different construction methods, piles can be divided into precast piles (prestressed pipe piles) and cast-in-place piles (drill-pipe cast-in-place piles). Both are widely used in soft soil foundations and deep-buried foundations. They have the characteristics of high bearing capacity...
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  • Beginning of Autumn

    Liqiu is the 13th solar term in the twenty-four solar terms. It is also the end of the lunar calendar and the beginning of the Shenyue; the time is around the first day of July in the lunar calendar (between August 7-9 in the Gregorian calendar). “Autumn” refers to the summer going to...
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  • Development trend of DTH hammer

    After several years of development and practice, DTH hammer drilling has proved to be an advanced drilling technology for dealing with hard and complex rock strata. Various hydraulic hammers have formed a new type of hole bottom power machine and will be developed at a deeper and higher level. Fi...
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  • China’s professional small well drilling rig

    The crawler five-inch reverse circulation drill is a multifunctional crawler reverse circulation drill independently developed by our company. Adopt new hydraulic system, mainly used in site dewatering Wells, ground source heat pump Wells, civil water Wells, agricultural irrigation Wells, the mac...
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  • Development of well drilling rig in China

    In the second century B.C., the original percussive drilling rig was used in China for a long time. It was not until the 1950s that wire rope percussive drilling rigs were imported from abroad. In the early 1960s, simple water well drilling rigs such as large and small wok cones and grab cones we...
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