Integrated underground hydraulic control fully-opened type sliding sleeve abrasive blasting and packing staged fracturing device

Abstract

The invention discloses an integrated underground hydraulic control fully-opened type sliding sleeve abrasive blasting and packing staged fracturing device which is particularly suitable for staged fracturing construction of horizontal wells. The integrated underground hydraulic control fully-opened type sliding sleeve abrasive blasting and packing staged fracturing device comprises an abrasive blasting device and a packer, wherein the abrasive blasting device is provided with a sliding sleeve, and the packer is provided with a rubber sleeve. An abrasive blasting device body is provided with a hydraulic control starting hole and an abrasive blasting opening, a spring is arranged on the upper portion of the abrasive blasting device body in a sleeved mode, and the upper portion of the abrasive blasting device body is connected with an upper joint. An abrasive blasting opening protective sleeve is arranged outside the abrasive blasting device body to effectively protect the abrasive blasting opening, the sliding sleeve is mounted inside the abrasive blasting device body, and the lower portion of the abrasive blasting device body is connected with a carrying barrel and is further connected with an outer cylinder body and a packer central tube through the carrying barrel so as to be connected with the packer. The carrying barrel and the sliding sleeve are connected through starting shear pins and are both provided with set packing liquid inlet holes, the set packing liquid inlet holes are communicated with a hydraulic control channel of the packer, and accordingly set packing and de-packing of the packer are effectively controlled. The integrated underground hydraulic control fully-opened type sliding sleeve abrasive blasting and packing staged fracturing device is simple in structure and reliable in working, multilayer staged fracturing construction can be achieved, the number of fracturing scales and segmentation series is effectively increased, inverse well flushing in a full well section can be achieved, and the fact that fracturing tubular columns can be pulled out at one time is guaranteed.

Description

technical field [0001] The invention relates to the oil well fracturing construction of horizontal wells in the petroleum industry, especially the downhole fluid-controlled full-open sliding sleeve sandblasting and isolation integrated segmental fracturing device, which is an unconventional fracturing device for low-permeability oil reservoirs and shale oil and gas. The staged fracturing tool for casing cementing, perforating and completion of resource development is especially suitable for staged fracturing construction of horizontal wells. Background technique [0002] At present, nearly 50% of my country's proven low-permeability reserves are difficult to develop due to low production capacity and poor mining efficiency. How to efficiently and economically produce low-permeability reserves is a long-term problem. Horizontal well staged fracturing technology is the key technology to solve the development of horizontal wells in low-permeability oilfields. Among them, the s...

AI Technical Summary

Problems solved by technology

Existing staged fracturing tools, such as: a pressure-guiding sandblasting packer for multiple layers of non-moving string fracturing with application number 201120468277.9, relies on the anti-wear sleeve on the choke nozzle to generate a choke pressure difference When the expandable packer is in the setting state, not only will it cause damage to the casing during fracturing, but also its inner diameter is limited, which limits the size of the ball, fracturing scale and stage series; the tool does not have sandblasting If there is sand plugging or sand sticking, the backwashing of the whole well section cannot be carried out, and the construction risk is high. The segmental sand settling makes the pipe string unable to be pulled out at one time, which increases the construction cost

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