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  • Hejian Yinhai Rock bits Manufacture Co., LTD Spring 2022 Campus Recruitment Guidelines

    1. Company profile Hejian Yinhai Rock bits Manufacture Co., LTD., founded in 2010, is located in Hejian Junzi Guan Industrial Development Zone, Cangzhou city, Hebei Province. The company mainly produces oil and water well equipment, trenchless engineering equipment, pile...
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  • Characteristics, working principle and application range of three – edge drill pipe

    Three-edge arc convex type gas drainage drill pipe, referred to as three-edge drill pipe. The middle rod body of three-edge drill pipe is three-edge arc type, and the two ends can be welded by friction welding to form an arc type with triangular appearance, or processed into a whole three-edge ty...
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  • Coal bit classification and its use is what

    Coal drill is now commonly used in the drilling industry three commodities, strength is divided into two categories, TYPE I for soft rock drilling, type II for hard rock and hard solid rock drilling. With faster drilling speed, wide milling coverage, time saving, effort saving, simple interface, ...
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  • Top 10 Coal mines in the world, do you know?

    As early as the Neolithic age, human beings have records of using coal, which is one of the important energy sources for the development of human society. Top 10 Coal mines in the World Due to its economic price, abundant reserves and important value, countries all over the world attach great imp...
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  • Diamond drill bit detailed classification introduction

    Diamond PDC anchor bit Also known as rock drills, anchor drills, two wings diamond compact bit, drilling in coal mine area is mainly used for roof support, anchor rod and anchor rope support before drilling, in the field of geological exploration, can be used in hard formation and hard rock drill...
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  • What should be noted when using diamond drill bit?

    First, diamond drill before drilling preparation 1. Check whether there is damage to the last diamond bit body, tooth loss, etc., to ensure that the bottom of the well is clean and no falling objects. 2. Handle the diamond bit carefully and place the diamond bit on the rubber pad or wood. Do not ...
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  • The Application of Various Deep Mixing Methods for Excavation Support Systems

    In a variety of circumstances, the use of deep mixing methods for the construction of excavation support systems and the ground support products is often the method of choice based on design requirements, site conditions/restraints and economics. These circumstances include the presence of adjace...
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  • Maintenance

    The Maintenance Ground support System provides the aircraft ground crew and maintenance support personnel with the means to upload and download all aircraft maintenance data for analysis with respect to health and usage. The system also supports data exchange with fleet-management systems and can...
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  • Ground Support With Sprayed Concrete

    A new type of sprayed concrete using coarse-grained aggregates and cement with special additives to accelerate the hardening of the concrete has been developed in Europe. Known as “shotcrete” it has found increasing application as a means of ground support for underground excavations in Europe an...
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  • news IADC Code By Yinhai Rock Bits

    news IADC Code By Yinhai Rock Bits

    INLLUSTRATION OF IADC CODE OF TRICONE BITS IADC-THREE DIGITS FIRST DIGIT SECOND DIGIT THIRD DIGIT FROM 1~8 Higher number denotes increase tooth count for harder formations FROM 1~4 FROM 1~7 This digit classify bits acco...
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  • new design product release

    new design product release

    YINHAI Product Line The high-quality YINHAI product line bits are designed for drilling various types of wells Sizes From 5 7/8” to 6  3/4” 5 7/8”- 6 3/4” Seals & Bearings: 5 7/8”to 6 3/4” Bits of this line have a reliable sealed journal bearings system  which provid...
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  • new design product release -roller hole openner

    new design product release -roller hole openner

    Ⅰ. OVERVIEW OF YINHAI HOLE OPENERS Roller Cone Hole Opener Size (inch): 8”~62”and customized according to drawings or requirements. Roller cone size(inch): 6 1/2”~26” Roller cones from tricone bits Pilot rock bit size: 5 1/2”,6 1/2”,8 1/2...
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