Compound fracturing bridge plug setting device

Abstract

The invention discloses a composite fracturing bridge plug setting device which is characterized in that a bridge plug comprises a central pipe, the peripheral surface of the central pipe is sleeved with a sealing rubber sleeve, a locking assembly and a shearing sleeve, the shearing sleeve moves downwards in the axial direction of the central pipe so that the locking assembly can be clamped and fixed in a sleeve, and the middle of the sealing rubber sleeve can be connected with the sleeve in a sealed mode; the setting device comprises a center rod, the lower end of the center rod is detachably connected with the upper end of the center pipe, the peripheral surface of the center rod is hermetically sleeved with a first piston, the lower end of the first piston is connected with a shearing sleeve, the peripheral surface of the upper end of the first piston is hermetically connected with a first outer cylinder, and a first liquid injection gap is formed between a first annular protruding part and the first piston; the center rod is provided with a first liquid injection hole communicated with the first liquid injection gap and the liquid injection channel in the center rod. The bridge plug can be quickly conveyed to a target layer to pack a well layer, operation is convenient and quick, the construction process is safe and reliable, efficiency is high, drilling and milling are easy after construction is completed, drill jamming can be prevented, and damage to an oil well sleeve is avoided.

Description

technical field [0001] The invention relates to the technical field of oil exploitation equipment, in particular to a composite fracturing bridge plug setting device. Background technique [0002] In the process of oil and gas well testing, when there are multi-layer formations, there are differences between the layers of oil, gas and water layers, and measures such as layered testing and layered stimulation are required. At this time, plugging and layering tools are required. Because the formation sealing technology of cable setting bridge plug has the characteristics of short construction period, accurate positioning of bridge plug sealing and low construction cost, it is widely used in the formation sealing technology of major oil fields in China. For a long time, drillable and millable metal bridge plugs have been widely used as oil and gas well layer separation devices in oil fields at home and abroad. Existing bridge plugs made of metal have disadvantages such as easy...

AI Technical Summary

Problems solved by technology

Existing bridge plugs made of metal have disadvantages such as easy jamming and difficulty in drilling and milling after construction operations. Once an accident occurs during construction, it is quite troublesome to deal with

Especially when it is used for fracturing, acidizing, sealing water and other processes in the stratification or section of deviated wells and horizontal wells, due to the influence of their special well body structure, it is more difficult to drill and remove metal bridge plugs in such wells. It is prone to problems such as eccentric grinding and milling of casing, sticking, and difficulty in flowback of cuttings, and it is more complicated to deal with problems than vertical wells

Moreover, although the electric setting tool used in the traditional bridge plug setting can be reused, the motor is used to return it. The repeated use of the motor affects the service life of the motor and also affects the service life of the cable.

At present, various oil fields have higher and higher requirements for construction quality, stricter cost control, and gradually strengthening the protection of people, so the existing bridge plug setting tools cannot meet the requirements of the existing technology

Images