Float collar and float shoe of cement

1. The top of the float shoe has the function of orientation.;2. The filling material of the cement float collar and float shoe is high-strength Grade G cement. Such cement can ensure leak-tightness and good drillability.;3. The material of the valve body is high-strength aluminum alloy that can provide good erosion resistance and back pressure resistance.;4. There are two optional forms of valves, i.e. Single valves and double valves.

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The upper and lower plugs isolate different liquids, and the drilling fluid or cement slurry can be scrapped off from the inner wall of the casing. The bumping signal will be given when bumping is completed, indicating cementing completion. The plugs can be divided into several types, including the upper/lower casing plugs, self-locking plugs, liner plugs, multi-stage cementing plugs and anti-rotation plugs. Both the length of the cement plug in the casing and the quality of the cement mantle in the casing shoe accessories can be ensured. Such plugs are also be mounted in cement heads to isolate the rubber products of different types of liquid during cementing operation.
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Standard plugs are applicable for various float collars and float shoes. The anti-rotation mechanism is designed for the anti-rotation plugs, improving drilling-off speeds greatly. Self-locking plugs are advanced technically and can be used safety; the product performance can reach the advanced level in China.
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The QZZS-A forced self-locking float collar and its associated self-locking plug (the plug also has the functions of forcing and self-locking) can provide effective self-locking and sealing. Through ground tests and the sit application of multiple wells, the tool is proven to have a reasonable structure. It can provide easy operation and reliable sealing, intentionally solving the series of problems caused by the cement plug that is left in the casing due to the non-return function failure of the float collar and the upward moving of the plug after cementing operation.
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During the casing lowering in deep wells, extended reach wells and long horizontal drainholes, cuttings will be tucked in the slot space of the slotted rolling ball centralizer, which will lead to encumbered ball rolling, stronger friction and difficult casing lowering. The roller of the resin roller centralizer is made of bearing steel, ensuring both the bearing strength of itself and the minimum friction generated during steel ball rolling.
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Single-plug cement heads are used for cement injection.Single-plug cement heads can be connected to casings.
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➣ Cut by laser integrally; heat treated; treated with powder coating;➣ High-precision machining technology meets the requirements of various sizes of boreholes;➣ No initial lowering resistance; with low friction and low torque;➣ Enhanced string centring support;➣ High strength, no weak point of stress, high reliability;➣ No separate components or welded parts;➣ Its elasticity can meet the requirements of lowering into reducing hole sections;➣ All indexes exceed the standards of API centralizers
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