Mechanical parameter measuring device of underground compression type packer and using method thereof

Abstract

The invention relates to the technical field of a tool and method for mechanical parameter measuring of an underground packer rubber system for petroleum exploitation, in particular to a mechanical parameter measuring device of an underground compression type packer and a using method thereof. The mechanical parameter measuring device comprises a drivepipe, an upper head, a lower head, a packer, a radial stress sensor and an axial stress sensor; the packer with a seal element assembly is installed in the inner cavity of the drivepipe; and the exterior of the drivepipe is provided with the radial stress sensor, and the packer is provided with the axial stress sensor. The mechanical parameter measuring device provided by the invention has the advantages of reasonability and compactness, is convenient to use; and by utilizing the method provided by the invention, the parameters carried by each rubber, such as axial load, friction, compression deformation force and the contact pressure to the inner wall of the drivepipe can be measured effectively and accurately in real time in the operation of the packer, no damage to the signal output thread of each sensor can be ensured, the test cost is lowered greatly, and a reliable basis for improving the design of the packer can be provided.

Description

technical field [0001] The invention relates to the technical field of a tool and a method for measuring mechanical parameters of a rubber cartridge system of an downhole packer used in petroleum development, and relates to a mechanical parameter testing device for a downhole compression packer and a method for using the same. Background technique [0002] In oilfield development, the packer is one of the main downhole tools for the injection and production operations such as layered oil production, layered water injection, layered fracturing or acidification, mechanical plugging of water, etc. The key component of the reliable sealing of the spacer. The packer is located between the tubing and the casing. When the packer rubber sleeve system bears an axial load, the rubber sleeve will undergo a large deformation, contact the inner wall of the casing and generate contact pressure, and make the ring between the casing and the tubing The space is cut off to form a seal. The ...

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Problems solved by technology

However, the distribution of the contact pressure between the rubber sleeve and the inner wall of the casing is related to many factors such as the axial load, the structure of the rubber sleeve system, the geometric dimensions of each part, and even the physical, chemical and mechanical properties of the rubber sleeve material, so even if it can be accurately It is also difficult to quantitatively determine the effect of various mechanical parameters in the rubber cartridge system on the isolation by measuring the distribution of the contact pressure between the rubber cartridge and the casing

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