Dynamic test device for composite perforator

Abstract

The invention relates to a dynamic measuring equipment for compound gun perforator in oil and gas well. It has a simulating target, which comprises cylinder, casing target in the cylinder cavity, cement ring and simulating target. There is a first cavum with fluid between the peripheral face of simulating target and the inner wall of cylinder. One container is set on the simulating target. Pressure measuring hole, in which first and second sensors are set, and pinhole for initiating line, which are connected with the cavum of container, is set on the wall of container. One simulating compound gun perforator cell is set in said container and there is a second cavum with fluid among the gun body of gun perforator, inner wall of said container and said casing target. Said pressure measuring hole, in which a first sensor is set, is connected with the inner of gun perforator by a protecting cover and the pressure measuring hole, in which a second sensor is set, is connected with said second cavum with fluid. The invention can measure the dynamic curve of pressure-time in the inner and annulus of compound gun perforator on the ground.

Description

technical field [0001] The invention belongs to the technical field of oil and gas well testing, in particular to a dynamic testing device for a composite perforator. technical background [0002] Composite perforator (composite perforating gun) has been used in oil fields for many years and has been generally recognized by oil fields. With the development of compound perforation technology, higher requirements are put forward especially for the research of gunpowder performance, the optimization of charge structure and the matching performance detection of guns, bullets and charges. The ground test method and device that can guide the product development and product acceptance of the orifice. At present, the dynamic testing technology of composite perforator downhole pressure-time dynamic curve (hereinafter referred to as p-t curve) has been preliminarily applied in oil fields. Connect the memory stick with the perforator, and store the obtained data in the memory stick. ...

AI Technical Summary

Problems solved by technology

The disadvantages of this technology are: 1) the p-t curve in the perforating gun cannot be measured, and the p-t curve in the gun has important guiding significance for the design of the perforating gun; 2) due to the poor impact resistance of the instrument, the test is reliable 3) Limited by the wellbore space of oil and gas wells, the physical memory volume is small, the storage space is small, the sampling frequency is low, and there are too few sampling points, it is difficult to capture the actual pressure peak, which causes pressure peak distortion; 4 ) is affected by the temperature of the wellbore, and the zero point drift of the test cannot truly reflect the actual application effect of the hole; 5) The detection process is complicated and the cost is too high; 6) In a group of experiments, the initial test conditions of the same wellbore cannot be obtained. The comparability of the results is poor; 7) In general, products under research and development, trial production and products before finalization cannot obtain oilfield downhole test permits

Therefore, the current downhole testing technology cannot guide the development and design of perforating guns, nor can it test the developed perforating gun products before going downhole.

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