Single-slips double-acting non-cyclical setting whipstock hanging tool

Abstract

The invention relates to a single-slips double-acting non-cyclical setting whipstock hanging tool which is used for fixing a whipstock during window sidetracking in casings of oil and gas wells. The technical scheme of the invention is as follows: an upper connector, an upper cylinder body and a lower cylinder body are connected in sequence by threads; a stop screw for positioning is arranged between the upper cylinder body and the lower cylinder body; a limit gear is connected with a piston and a lower connector sequentially by using threads, the limit gear is connected with the piston and the piston is connected with the lower connector respectively by using two shear pins; a filtering net is arranged at an setting channel port of the upper connector, the anti-blocking slide sleeve is suspended at the lower port of the piston, and a steel ball is arranged in the lower connector; four slips bodies are symmetrically arranged on a T-shaped channel on the inclined surface of the piston, and the slips bodies are embedded with hard alloy teeth; and the upper cylinder body is connected with the limit gear through a unidirectional gear buckle. The hanging tool has the advantages of simpleness in operation, setting reliability, short construction period and reduced accident rate under the shaft; and the single-slips double-acting non-cyclical setting whipstock hanging tool disclosed by the invention is capable of finishing the setting hanging under the pump pressure of 20-25MPa, can bear 30T axial setting force and is used for window sidetracking in the well drilling operation.

Description

technical field [0001] The invention relates to a single-slip double-acting non-circulation setting deflector suspension tool for fixing the deflector when sidetracking through windows in the casing of oil and gas wells. Background technique [0002] Casing window sidetracking technology is a new technology developed in recent years. It is mainly used to solve casing damage wells, deformed wells and accident wells in old oilfield blocks to restore production capacity. One of the important measures to develop remaining oil and gas reservoirs. The core of casing window opening sidetracking technology is to have a reliable and efficient window opening tool, and the hanging setting tool is one of the most important components of the casing window opening tool. At present, most of the better hydraulic suspension setting devices for window sidetracking in China are double-slip single-acting cycle setting. Such tools have the advantages of reliable setting, simple operation, and s...

AI Technical Summary

Problems solved by technology

At present, most of the relatively good hydraulic suspension setting devices used in domestic window sidetracking are double-slip single-action cycle setting. Such tools have the advantages of reliable setting, simple operation, and short construction period. However, two sets of slips The tile makes the tool structure longer, which increases the downhole accident rate and manufacturing cost; at the same time, since the well cannot be flushed circularly during the setting process, when there are impurities such as rust and sand in the casing, the tool setting is unreliable, and even Unable to complete the setting suspension, which increases the operating cycle

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