Downhole throttle technology pipe string and method for horizontal well

Abstract

The invention discloses a downhole throttle technology pipe string and method for a horizontal well. The downhole throttle technology pipe string for the horizontal well comprises a downhole throttledevice setting technology pipe string body and a downhole throttle device drill grinding technology pipe string body, wherein the downhole throttle device setting technology pipe string body comprisesa first continuous oil pipe, a first double-petal check valve is connected to one end extending into the horizontal well of the continuous oil pipe through a first connector, a first shear lost handis connected to the free end of the first double-petal check valve, a hydraulic release tool is connected to the free end of the first shear lost hand, and a downhole throttle device is connected to the free end of the hydraulic release tool; and the downhole throttle device drill grinding technology pipe string body comprises a second double-petal check valve connected to the end part of a secondcontinuous oil pipe through a second connector, a second shear lost hand is connected to the free end of the second double-petal check valve, a positive displacement motor is connected to the free end of the second shear lost hand through a circulating joint, and a drill bit is connected to the free end of the positive displacement motor. The downhole throttle technology pipe string can be mounted at optional positions of a horizontal section according to needs, and it is guaranteed that downhole throttle of the horizontal well reaches the optimal effect.

Description

technical field [0001] The invention relates to a downhole process pipe string for throttling and reducing pressure during natural gas production, which is suitable for use in gas wells and horizontal wells with self-spraying capability. Background technique [0002] Horizontal wells have incomparable advantages over conventional vertical wells in terms of technical and economic benefits. With the development of drilling and oil (gas) technology, horizontal wells have been widely used in the development of gas reservoirs. Gas well production enters the middle and late stages, and the fluid accumulation in the wellbore is intensified. Drainage and gas recovery are an effective method to solve the gas well fluid accumulation. The downhole throttling technology is a kind of technology that the throttling and pressure reduction process of natural gas occurs in the wellbore of the gas well through the downhole throttle. Gas technology, so it is widely used in gas well production...

AI Technical Summary

Problems solved by technology

Due to the limitations of existing technological conditions, downhole chokes of gas wells are currently only installed in the wellbore of the vertical well section, and the sweeping range is limited. With the lengthening of the horizontal section, the drainage and gas recovery effect of the downhole choke decreases exponentially, especially in When the water production volume is large in the middle and late stages of development, the effect is almost ineffective

Images