Linkage setting and flow dividing leakage finding tool

Abstract

The invention belongs to the field of downhole tools, and particularly relates to a linkage setting and flow dividing leakage finding tool. The linkage setting and flow dividing leakage finding tool comprises an upper connector, a center pipe, a setting piston, a rubber barrel and a lower connector; the upper connector and the lower connector are connected to the upper end and the lower end of the center pipe through threads correspondingly; the setting piston and the rubber barrel are arranged on the outer side of the center pipe in a sleeving mode; a liquid passing hole is formed in the center pipe; and during setting, the interior of the center pipe is pressurized, pressure is conducted to the upper side of the setting piston after passing through the liquid passing hole, the setting piston slides along the outer wall of the center pipe under pushing of the pressure, then the rubber barrel is compressed, and the rubber barrel is set. According to the linkage setting and flow dividing leakage finding tool, the two functions of packing and flow dividing can be achieved at the same time, and mutual interference of the two actions in the leakage finding process is eliminated by linking the two actions of setting and flow dividing of the rubber barrel; and meanwhile, by designing the opportunity of the setting action and the flow dividing action of the rubber barrel, a jet hole is opened for flow dividing only after the rubber barrel is set to a certain degree, and thus the pressure stabilizing effect of the rubber barrel is ensured.

Description

technical field [0001] The invention belongs to the field of downhole tools, and in particular relates to a linkage setting, diversion and leak detection tool, which is also suitable for fracturing pipe strings. Background technique [0002] With the extension of oil field development time, oil and water well casings have been subjected to corrosion, stress, wear, impact and other reasons for a long time, and phenomena such as casing leakage, misalignment, and cracking have occurred, affecting the normal production of oil and water wells, and inefficient and ineffective injection of water injection wells 1. Oil well production is suppressed, and the well fluid returns to the ground from the outside of the casing, which will also cause environmental pollution. [0003] The existing leak-finding strings are mainly K344 packer matching restrictors for leak-finding. The packer is set and sealed, and the restrictors are shunted and suppressed. Observe whether the string is stable...

AI Technical Summary

Problems solved by technology

However, during the construction process, due to the inconsistency of processing parameters and processing quality of K344 packer and choke, the choke was opened in advance and the packer was set and sealed.

[0004] At the same time, because the K344 packer is an expansion rubber sleeve, the life of the rubber sleeve is short, and the liquid inside the rubber sleeve has fluidity. Especially in directional wells, when the pressure reaches a certain pressure, there is a problem of liquid channeling from the side, resulting in poor pressure stabilization effect and leakage. fuzzy judgment

The choke structure is an external spring structure that is prone to damage, and if it carries debris in the well, it may cause the choke to fail

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