Single-ball-type hydraulic drilling liner hanger

Abstract

The invention discloses a single-ball-type hydraulic drilling liner hanger. The single-ball-type hydraulic drilling liner hanger comprises an external casing pipe, at least two sit hanging mechanisms,a blocking mechanism, a plurality of hydraulic transmission mechanisms, a first pitching pressure building mechanism and a second pitching pressure building mechanism, wherein the at least two sit hang mechanisms and the blocking mechanism are arranged on the outer wall of the external casing pipe, the multiple hydraulic transmission mechanisms are arranged below each sit hanging mechanism and below and above the blocking mechanism, and the first pitching pressure building mechanism and the second pitching pressure building mechanism are arranged on the inner side of the external casing pipe.A plurality of pressure transmission hole sets communicating with an inner cavity of a hydraulic cylinder of each hydraulic transmission mechanism are formed in the side wall of the external casing pipe, and thus the sit hanging mechanisms and the blocking mechanism can be arranged on the well wall in a sit hanging or blocking mode under the effect of hydraulic pressure. The first pitching pressure building mechanism is located on the part, between the sit hanging mechanisms and the blocking mechanism, of the inner wall of the external casing pipe, and the second pitching pressure building mechanism is located on the part, below the blocking mechanism, of the inner wall of the external casing pipe. The device can correspondingly utilize the two pitching pressure building mechanisms to prevent the problems of late sit hanging and blocking or improper timing from happening, the sit hanging effect is improved effectively, and the success rate of sit hanging and effective blocking are ensured.

Description

technical field [0001] The invention relates to the technical field of oil and gas well liner suspension cementing, in particular to a single-ball hydraulic liner hanger. Background technique [0002] In oil and gas wells such as deep wells, directional wells, and horizontal wells, etc., the liner cementing method is often used in order to save a large amount of casing and cement. At present, during the cementing operation of the liner hanger, it is often encountered that the liner hanger cannot be set up or cannot be effectively set up after being run into the setting position; or due to bumps or Improper operation will damage the slips, affect the problem of sitting and hanging, and lead to the failure of the operation. Therefore, it is necessary to improve the structure of the existing liner hanger to solve the above problems. Contents of the invention [0003] The purpose of the present invention is to provide a single-ball hydraulic liner hanger capable of improving...

AI Technical Summary

Problems solved by technology

At present, during the cementing operation of the liner hanger, it is often encountered that the liner hanger cannot be set up or cannot be effectively set up after being run int

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