One-trip string two-layer layering perforation-layering testing combining tubular column and operation method thereof
A layered testing and pipe string technology, which is applied in the field of testing pipe strings and two-layer perforation of oil and gas wells, can solve the problems of not saving the final shut-in time, difficult to record small layers, and short construction period, etc., so as to facilitate oil testing Increase the speed and efficiency, realize the effect of increasing the speed and efficiency of oil testing, and increase the proportion of layered oil testing
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[0041] In order to disclose the purpose, technical means and technical effects of the present invention more completely and clearly, the following is a detailed description, and please refer to the accompanying drawings and component numbers.
[0042] The invention provides a reasonable and compact sealing layer shut-in sampling valve, such as figure 2 shown. Please refer to the following Figure 2-4 , the sealing layer shut-in sampling valve 16 of the present invention can be connected to the described two-layer layered perforation-layered test combined pipe string, which is a multi-layer tubular body, and the sealing layer shut-in sampling valve is radially It has an outer layer, a middle layer and an inner layer, and the outer layer is connected with an upper joint 101, an air cavity joint 106, a ball valve outer cylinder 108, a lofting valve joint 117, a lower joint 118, and an air cavity joint 106 from top to bottom in the axial direction. The outer wall is provided wi...
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