The casing anchor is designed with two levels of anchor claws of different lengths, the shorter upper claw suitable for reduced diameter and hard formation wellbores, and the longer lower claw suitable for loose and enlarged wellbores. During anchoring, the two levels of claws interact automatically; the primary claw opens first during operation, and when its force is insufficient, the secondary claw automatically opens and anchors in conjunction, complementing the primary claw. The anchor claws have a large open diameter, reaching up to 560mm. The tool incorporates a claw locking mechanism to prevent accidental opening during lowering. It integrates a float collar, float shoe, and guide shoe, reducing the cost of the completion string. The two levels of anchor claws are symmetrically distributed along the axial direction at a 90° angle. This design not only improves the strength of the anchor but also enhances its adaptability and reliability, ensuring successful application in shallow loose enlarged diameter formations, deep reduced diameter wellbores, and irregular hard wellbores.
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The multifunctional scraper is a new type of scraper that can be used as a general non-rotating fixed scraper, and also as a rotatable scraper. In addition to conventional cleaning operations, if an obstruction is encountered midway, the pipe string should be stopped, the wellhead should be connected and flushed, and a certain upward force should be applied to shear the shear pin and switch to the rotating linkage mode. Then, according to the actual situation, the unblocking operation can be carried out, such as providing a certain torque, pressing down, circulating, and impacting, until the normal operation is restored, and then the pipe string can be continued.
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The JY type scraper can be used as a general fixed scraper, or as a rotating casing scraper. When used as a fixed scraper, simply increase the adjustment pad at the upper joint to prevent rotation. Reducing the adjustment pad makes it a rotatable scraper. Its main purpose is to remove cement, sand, residual bullets, scratches, paraffin, burrs and other attachments from the inner wall of the casing, protecting the cleanliness of the inner wall of the casing.
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ADDRESS：No.56 Xingye Road, Mudanjiang City, Heilongjiang, China.
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