An integrated downhole operation tool based on a two-way slip retrievable hydraulic packer

Abstract

The invention provides an integrated downhole operation tool based on a two-way slip retrievable hydraulic packer. The working tools include: a test valve, a pressure gauge holder, a fluid replacement valve, a plugging valve and a two-way slip retrievable hydraulic packer. Wherein, the packer includes: a central mandrel, a first shearing fixture, a second shearing fixture, a third shearing fixture, and a liquid cylinder sleeved on the outer wall of the central mandrel in sequence from top to bottom The outer cylinder, the locking mandrel and the limit assembly are sequentially sleeved on the outer wall of the locking mandrel, the annular piston, the locking ring assembly, the rubber tube, the cone and the slips. The upper end of the test valve is connected to the upstream of the integrated downhole operation tool, the lower end of the test valve is connected to the upper end of the pressure gauge, the lower end of the pressure gauge is connected to the upper end of the replacement valve, the lower end of the replacement valve is connected to the upper end of the blocking valve, and the lower end of the blocking valve is connected to the two-way Slips recoverable hydraulic packer connection. The invention has the functions of oil testing and well completion and putting into production at the same time, and can be recycled and used.

Description

technical field [0001] The invention relates to the technical field of well testing and completion equipment for oil and gas wells, in particular to an integrated downhole operation tool based on a two-way slip retrievable hydraulic packer. Background technique [0002] At present, the oil testing and completion operations of most exploration wells or evaluation wells need to be completed in two steps. The first step is to lower the test pipe string with a series of tools such as test packer, test valve, and electronic pressure gauge to the vicinity of the production layer, and then conduct a blowout production test. plugging, this step is mainly for the purpose of obtaining formation data; if there is production, it is necessary to complete the well and put it into production, then go to the second step, and re-perform the wellbore preparation (including drilling plugs, wall scraping, well drilling, etc.), and then run into the belt to complete the well The completion stri...

AI Technical Summary

Problems solved by technology

[0003] There are many processes and long working hours, so it cannot be put into production in time

Oil testing generally includes more than ten steps such as drilling, wall scraping, running test strings, perforating, reservoir stimulation, blowout and fluid discharge, production testing, well killing, and testing strings. Including nearly ten steps such as secondary wellbore preparation, running the completion string, fluid replacement, setting, and blowout. Some wells even need secondary acidification to restore production capacity, which will take a lot of time

[0004] Multiple well kills will cause pollution to the oil and gas production layer, and even cause permanent damage in serious cases, making it impossible for the oil and gas production layer to restore its due production capacity

At the same time, multiple kills are likely to cause problems such as pipe string jamming, which will increase the difficulty of the project. If it is handled carelessly, the wellbore may even be scrapped, resulting in a great waste of resources.

The oil test string is equipped with test tools such as packers and test valves, and the space in the channel is limited. During the well killing process, plugging materials are easy to accumulate at the tools and bury the string, making it difficult to remove the test string.

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