Device for determining the extension state of the pipe string

Abstract

The invention relates to a device for determining the extension state of a pipe string, the pipe string includes an upstream end configured with a liquid inlet and a downstream end configured with a liquid outlet, the device includes an execution unit, and the execution unit It includes: a liquid injection container, an acid liquid inlet is constructed on the wall of the liquid injection container, and the upstream end of the pipe string is accommodated in the liquid injection container and spaced from the top wall of the liquid injection container; A rock sample container with a rock sample, an acid liquid outlet is constructed on the wall of the rock sample container, the downstream end of the pipe string is accommodated in the rock sample container, and the liquid outlet faces the rock sample; and a measuring device, the measuring device is set at a distance from the upstream end of the pipe string and is used for measuring the extension state of the pipe string. By means of this device, the extension state of the pipe string can be effectively determined.

Description

technical field [0001] The invention relates to the field of reservoir acid fracturing technology, in particular to a device for determining the extension state of a pipe string. Background technique [0002] Lateral pipe stimulation technology (also known as flexible lateral pipe stimulation technology) is a new open-hole well completion stimulation technology. This technology is mainly to set branch pipe strings in the completion pipe string, and spray acid liquid into the reservoir through the branch pipe strings to perform erosion and pore making. As the pore-making operation proceeds, the branch pipe string can be inserted into the reservoir after pore-making under the action of pressure difference. The branch pipe string inserted into the reservoir is conducive to exploiting more resources in the reservoir, thereby helping to achieve the effect of increasing production. [0003] However, in the prior art, it is difficult for the operator to control the depth of the b...

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Problems solved by technology

[0003] However, in the prior art, it is difficult for the operator to control the depth of the branch pipe string inserted into the reservoir, mainly because it is difficult for the operator to grasp the speed at which the acid liquid corrodes the reservoir and the speed at which the branch pipe string protrudes into the reservoir, etc. The features that affect the extension state of the pipe string are related to

In this case, it is difficult for the operator to control the extension process of the branch pipe string and the final extension amount

This can lead to difficulty in guaranteeing the efficiency and production of mining reservoir resources

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