Two-way slip hydraulic permanent packer

Abstract

The present invention provides a two-way slip hydraulic permanent packer. The packer includes: an upper mandrel, a lower mandrel, an upper hydraulic outer cylinder, a lower hydraulic outer cylinder, a first shearing fixture, a second shearing The cutting fixture, the third shearing fixture, and the upper slip, upper cone, rubber tube, lower cone, lower slip, lock ring sleeve, and inner lock that are set on the upper mandrel in sequence from top to bottom A ring, a stop piece and an elastic piece, and an annular piston sleeved on the lower mandrel. Among them, the lower end of the upper mandrel is connected with the upper end of the lower mandrel, and the lower end of the lower mandrel is connected with the lower hydraulic outer cylinder; the upper end of the upper slip is fixedly connected with the upper mandrel, and the lower end is sleeved on the conical surface of the upper cone, The lower section of the upper cone is connected to the upper mandrel through the first shearing fixture; the rubber cartridge is arranged between the upper cone and the lower cone; the upper section of the lower cone is connected to the upper mandrel through the second shearing fixture; The upper end of the lower slip is sleeved on the tapered surface of the lower vertebral body. The packer of the present invention has two-way sealing, and has the advantages of losing hands and secondary tie-backs.

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 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 string with a series of tools such as packer, test valve, and electronic pressure gauge to the vicinity of the production layer, and then conduct a blowout production test. After the test, kill the well, pull the string and temporarily plug , this step is mainly for the purpose of obtaining formation data; if there is production and the well needs to be completed and put into production, it will be transferred to the second step, and the wellbore preparation (including drilling plug, wall scraping, well drilling, etc.) Completion strings for a series of tools such as separators and downho...

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] Since the packer used does not have the function of downhole drop-off and secondary tie-back, it is necessary to run the packer and the lower pipe string multiple times, resulting in repeated procedures, which is time-consuming and labor-intensive

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