Integrated downhole operation tool based on bidirectional slip hydraulic permanent packer

Abstract

The invention provides an integrated downhole operation tool based on a bidirectional slip hydraulic permanent packer. The operation tool comprises a test valve, a pressure gauge supporting cylinder,a liquid replacing valve, a plugging valve and the bidirectional slip hydraulic permanent packer, wherein the packer comprises an upper mandrel, a lower mandrel, an upper hydraulic outer cylinder, a lower hydraulic outer cylinder, a first shearing fixing piece, a second shearing fixing piece, a third shearing fixing piece, an upper slip, an upper cone, a rubber cylinder, a lower cone, a lower slip, a lock ring assembly, a double-male short section and an annular piston, wherein the upper slip, the upper cone, the rubber cylinder, the lower cone, the lower slip, the lock ring assembly and the double-male short section are sequentially arranged on the upper mandrel in a sleeving mode from top to bottom, and the annular piston is arranged on the lower mandrel in a sleeving mode. The upper endof the test valve can be connected with the upstream of the integrated downhole operation tool, the lower end of the test valve is connected with the upper end of a pressure gauge, the lower end of the pressure gauge is connected with the upper end of the liquid replacing valve, the lower end of the liquid replacing valve is connected with the upper end of the plugging valve, and the lower end ofthe plugging valve is connected with the bidirectional slip hydraulic permanent packer. The integrated downhole operation tool has the functions of oil testing and well completion production.

Description

technical field [0001] The invention relates to the technical field of oil and gas well testing and completion equipment, in particular to an integrated downhole operation tool based on a two-way slip hydraulic permanent 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 strings of a ser...

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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