A straddling perforation-testing combined pipe string capable of measuring the lower layer first and its operation method
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A technology of spanning and pipe string, applied in the field of spanning perforation-testing combined pipe string, can solve problems such as inability to achieve, and achieve the effect of improving speed and efficiency of oil testing and optimizing operation time.
Active Publication Date: 2018-12-21
华信唐山石油装备有限公司
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However, both of them have the following disadvantages: one string can only perforate and test the formation between the two packers, and it cannot be realized that the drilled layer below the lower packer can be perforated in one string. After the test, the unperforated layer between the two packers will be combined with perforation-test construction
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[0040] In order to have a more complete and clear disclosure of the purpose, technical means and technical effects of the present invention, a detailed description will be given below, and please refer to the drawings and component numbers.
[0041] The invention provides a well-sealed shut-in valve with a reasonable and compact structure, such as figure 2 Shown. Please refer to it below Figure 2-4 The sealing shut-in valve 16 of the present invention can be connected to the two-layer layered perforation-layered test combined pipe string. It is a multi-layer tubular body. The sealing layer shut-in valve 16 has an outer radial direction. Layer, middle layer and inner layer. The outer layer is connected with the upper joint 101, the air cavity joint 106, the ball valve outer cylinder 108, the lofting valve joint 117 and the lower joint 118 from top to bottom in the axial direction. There is an outer pressure pipe inlet 104; the middle layer has a mandrel 102 slidably arranged ins...
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Abstract
Provided is a straddle perforating and testing combining string capable of firstly testing a lower layer and an operation method thereof. The combining string comprises a first oil tube, a depth correction short section, a second oil tube, a circulating valve, a third oil tube, a testing valve assembly, a second pressure meter supporting tube, a pressure transfer connector, a straddle packer, a screening tube connector, a spacer tube, a pressure guide connector, an ignition head, a perforating gun, a pressure release device, a sealing layer shut-in valve, a slip packer, a fourth oil tube, a damping pressure meter supporting tube, a first screening tube, an inner pressure transfer tube and an outer pressure transfer tube; the sealing layer shut-in valve is located between the perforating gun and the slip packer, the damping pressure meter supporting tube is located below the sealing layer shut-in valve, and the two ends of the outer pressure transfer tube are connected to the pressure guide connector and an outer pressure transfer tube inlet of the sealing layer shut-in valve. By means of the string, a perforated layer below the lower packer can be tested firstly, and then straddle perforating and testing combining construction is conducted on an un-perforated layer between the two packers, so that final shut-in of the first layer do not need to occupy the time of an operation machine separately; the advantages of being short in period, low in cost and the like are achieved.
Description
Technical field [0001] The invention relates to an oil and gas well straddle perforation and test combined pipe string and an operation method thereof, in particular to a straddle perforation-test combined pipe string capable of first testing the lower layer and an operation method thereof. Background technique [0002] In terms of oil and gas well straddle perforation-testing combined technology, the oil test technology closest to the present invention includes "oil and gas well straddle perforation-test combined construction string device" and "spanned perforation-test combined operation" Construction pipe string" [0003] "Oil and gas well span perforation-test joint construction string device" (Patent Application No. 97229886.X) is a string structure with a perforating gun clamped between two-stage packers. It can realize the integrated operation mode of first striding and sealing the target layer, and then perforating and testing the target layer. [0004] "Across-barrier perf...
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