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    POSITIVE CENTRALIZER

    For the SHUANGJIA positive centralizer, the manufacturing technique is almost the same with single bow non-welded spring centralizer and double-bow non-welded spring centralizer, the only difference in grooved spring steel sheet. Compared with others, the contact with wellbore wall was larger, empowering it with much stronger centralizing force. Since the OD is smaller than wellbore, the triggering force is almost zero, and the mud flowing through groove can adjust the fluid direction for better circulation. This type of centralizer is suitable for regular wellbore or open hole, also applicable for deviated or horizontal well, safe and reliable.

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    WHIRL-BOW CENTRALIZER

    For the SHUANGJIA whirl bow centralizer, the manufacturing technique is almost the same with single bow non-welded spring centralizer, the only difference in that fin-shape steel sheet is welded on the bow steel sheet, which can change the mud direction, enabling swirl effect finally improving flow speed and circulation. This type of centralizer is applicable for irregular wellbore or open hole.

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    WELDED BOW CENTRALIZER

    The SHUANGJIA spring sheet of welded bow centralizer is welded onto wale, increasing the integral strength.  Its centralizing strength is stronger than Single bow non-welded spring centralizer. This type of centralizer is suitable for irregular wellbore or open hole.

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    WELDED RIGID CENTRALIZER

    SHUANGJIA Welded Rigid centralizer is by welding the centralizing bars onto steel ring, making them an integral one, having increased centralizing force and stability. It is fixed onto casing by screws, without using stop collar. This type of centralizer is suitable for regular wellbore or deviated well and horizontal well.

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    SHORT RIGID CENTRALIZER

    SHUANGJIA Short Rigid Centralizer is the most popular one, manufactured of cast iron, fixed on casing by screws, and its mechanical properties meeting the downhole requirement. This type of centralizer is mainly suitable for vertical well, low cost and wide application.

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    WIDE-BLADE RIGID CENTRALIZER

    SHUANGJIA Wide-blade Rigid Centralizer is a special one, manufactured of cast iron, wide centralizing blade, large bevel angle, which can prevent damaging wellbore, and facilitate in passing through difficult section; it can be fixed on casing by screws or stop collar, and its mechanical properties meeting the downhole requirement. This type of centralizer is mainly suitable for irregular wellbore or deviated or horizontal well.

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