| 摘要 |
A cementing apparatus is shown for use with a wireline run setting tool. The apparatus includes a retainer with external gripping and sealing members for sealing off a lower region of the well below the sealing members. The cement retainer has a plurality of cementing ports at the lower end thereof which communicate the interior of the retainer with the lower well region. A sliding valve located within the lower end of the retainer can be moved between open and closed positions to control communication of fluids between the interior of the retainer and the lower well region. An inner body is initially received within the interior of the retainer end is retained in position by means of a collet latch. Actuation of the setting tool sets the gripping and sealing elements of the retainer and moves the inner body to shear the collet latch. This action simultaneously closes the cementing ports by moving the sliding valve within the lower end of the cement retainer. The cementing ports can be reopened by inserting the lower end of a tubing string within the interior of the retainer.
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