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    WASHOVER PIPE

    　　The washover pipe is a necessary tool for performing washover operation, and washover operation can relieve various of sticking accidents in the well. In addition to rotary washover function, it can also sand washover, salt washover,hot washing and deblockingetc.

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    CASING SWAGE

    　　Casing swage is one special tool to repair slightly deformed casing which use for oil, gas and water well, recover the original casing drift diameter to meet various requirement of downhole operation.Casing swage can repair slightly deformed casing, maximum up to 98%. It consists of eccentric shaft, top roller, middle roller, bottom roller, taper roller and plug.With the advantages of easy to operate and control, wide range of application, harmless to casing, effectively solvethe deformed casing and resume production timely.

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    CUP TESTER

    　　Cup tester is mainly used in casing pressure testing. For oil, gas and water well that have been run in casing and equipped with wellhead device, it can layer pressure testing one time for casing and BOP system. It can also be used for casing pressure test in pipe yard of mine yield. The pressure testing process is very convenient as long as put the cup tester into the casing.

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    QUICK-OPERATING THREAD PROTECTOR

    　　Casing quick-operating thread protector is one kind of manual device for protecting casing outer thread, its structure is simple, solid anddurable, reliable performance.

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    DMS CASING ANCHOR

          The structure of the DMS casing anchor is designed with two stages of fluke with different lengths. The first stage is shorter fluke adapted to the borehole with reduced diameter and hard formation, and the second stage is suitable for the borehole with loose and expanded diameter.  During the anchoring process, the two stages can interact with each other. The first stage opens first during construction. When the strength of the first stage is insufficient, the second stage opens automatically for joint anchoring, complementing each other.  The outer diameter of the anchor jaw is large, up to 560mm.  The tool is equipped with an anchor claw locking mechanism to prevent accidental opening during down hole process.  Built-in floating hoops, float shoes and guide shoes reduce completion string costs.  The two-stage flugs are distributed symmetrically at 90° along the axial direction. This design can not only improve the strength of the anchor, but also improve the adaptability and reliability of the anchor, so as to ensure the successful application of the anchor in shallow loose expanding formation, deep reducing diameter borehole and irregular hard borehole.         The two-stage casing anchor at the lower end of the casing string and directly connected with the casing. After the casing reaches the bottom of the well, the pump is circulated, and the drilling fluid is returned from the circulation hole. Normal cementing and impact pressure. After the rubber plug is pressed, sit on the upper rubber plug of the ground anchor, and then slowly hold back the pressure. When the pressure reaches 15-20 MPa, cut the shear pin, the ground anchor rubber plug seat moves down, push the center tube and the connecting rod group, and open The two-stage anchor claw makes it anchored to the well wall, and the prestress of the wellhead lifting reaches the designed tonnage or length under the pressure holding state, and the casing is set afterwards, and the prestress construction of the lifting casing is completed.  

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