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Stage Cementer

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No Drilling Mechanical Stage Cementer (Salvage Type)

Purpose and characteristics:

1) Two-stage cement injector is a kind of Cementing Tool commonly used in deep wells, exploratory wells and complex wells. It can change the conventional one-time cement injection into two-stage cement injection, so as to solve the problems of leakage, large cement volume and large temperature difference. Cementing problem.

2) ZTJ-A140 series two-stage cement injector adopts the internal closed structure of **, with reasonable structure, strong sealing ability and reliable closing;
3) With ** closing function, the outer wall of the upper part of the closing sleeve and the inner wall of the upper part of the outer cylinder are processed with serrated inverted teeth in opposite directions, which are used to lock the closing sleeve to slide up and down to achieve ** closing.
4) The ** advantage of the two-stage cement injector of this structure is that after the closing sleeve is closed in place, the upper limit block of the closing sleeve falls into the designed groove, and the entire inner sleeve is separated from the closing sleeve together with the opening plug and the closing plug. The effect of dead weight falls to the bottom of the well, reducing the drilling cost.
5) Appropriate material selection and fitting clearance were carried out to avoid tension or thermal expansion of the tool after going down the well to make the inner and outer sleeves form an interference fit, which is not conducive to opening and closing

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