Horizontal well jarring jam releasing device and construction method thereof

Abstract

The invention relates to a horizontal well jarring jam releasing device and a construction method thereof used for underground jam releasing work of horizontal wells. The device comprises a jar and a jarring force increasing device, a jarring accelerator is connected between the jar and the jarring force increasing device through an oil pipeline, and comprises a transmission shaft and a center pipe, the transmission shaft is connected with a transmission sleeve through a connecting key, and energy storage springs are arranged in a work barrel outside the center pipe; the upper portion of the transmission shaft is connected with the jarring force increasing device through an accelerator upper joint or an oil pipe coupler, the lower portion of the transmission shaft is connected with the center pipe, the upper portion of the work barrel is connected with the transmission sleeve, and the lower portion of the work barrel is connected with the jar through an accelerator joint; the transmission shaft can drive the center pipe to move upwards to compress the energy storage springs. The device is connected in a jam releasing pipe column, if a fish jam point is not released, ground pumping pressure is increased, force is increased for jam releasing, the requirement for the load of ground equipment is lowered, and the applicability of the jam releasing device is improved. The jam releasing success rate of the horizontal wells can be improved, and the work cost of the horizontal wells is greatly lowered.

Description

technical field [0001] The invention belongs to the downhole jamming operation tool and technology of the petroleum industry, in particular to a horizontal well jarring jamming unblocking device and a construction method thereof, and is especially suitable for the downhole jamming unblocking operation of the horizontal well. Background technique [0002] The jar is an important tool to relieve downhole sticking accidents. Its application has been extended to the fields of horizontal wells and highly deviated wells. At present, hydraulic compensation jars are generally used as a tool for jarring and jamming in major oil fields. It mainly It is a shock tool that produces an upper impact force. It is composed of a mandrel, an impact sleeve, a tapered piston and a hydraulic cylinder liner. The chamber is filled with turbine oil, and is separated into upper and lower chambers by a hydraulic delay mechanism. When working, the mandrel of the jar is connected with the hook of the ...

AI Technical Summary

Problems solved by technology

[0003] However, the original jarring release technology has the following problems when applied to horizontal wells: the wellbore friction of horizontal wells is very large, and the elastic deformation energy stored in the upper drill string of the jar is consumed by friction when it is released, and the jarring effect is not ideal. Can't even generate a shock

Images