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An operation method of a full-diameter spanning perforation-testing joint string

An operation method and full-bore technology, which is applied in the field of oil and gas well testing, can solve the problems of difficult real-time recording of test valves across perforation, less pipe string functions, and difficulty in rod fishing, so as to solve the problem of wellbore storage effect, Reduce the number of operations and the probability of reservoir contamination, and avoid the effect of salvaging and throwing rods

Active Publication Date: 2021-08-06
营口市双龙射孔器材有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the fact that there is a perforated well section below the layer to be tested, the existing technology has few functions of the pipe string, difficulty in pulling out the rod after the rod throwing ignition fails, low efficiency, and non-spontaneous well spanning the perforation——difficult to record in real time during the test The object of the present invention is to provide an efficient, convenient and multi-functional full-bore spanning perforation-testing joint operation string and its operation method

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  • An operation method of a full-diameter spanning perforation-testing joint string

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Embodiment Construction

[0032] The present invention is described in detail below in conjunction with accompanying drawing:

[0033] Such as figure 2 As shown, the parallel detonation type pressure delay ignition head 23 includes: detonating cord frame 51, upper joint 52, detonating cord 53, detonating cord hole 531, sliding sleeve 54, locking block cover 55, locking block 56, firing pin Assembly 57, spline joint 58, delay detonator assembly 59, plug 60, hollow cavity 601, seal ring 61, shear assembly 62, shear pin 621, pressure transmission hole 1 631, pressure transmission hole 2 632 , Air cavity 64, spline 65, jacket joint 66.

[0034] The inner side of the upper joint 52 is sequentially provided with a detonating cable holder 51, a plug 60, a shear assembly 62, a sliding sleeve 54, a lock block sleeve 55 and a lock block 56, and the outer wall of the upper joint 52 is radially provided with A pressure transmission hole 631 is provided with a detonating cord hole 531 in the axial direction, and t...

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Abstract

The present invention provides an efficient, reliable and multi-functional full-diameter spanning perforation-test joint string and its operation method for the situation that there is a well section under the oil layer to be tested. The string is equipped with a full-pass Diameter-span perforating components, JJ‑1 carrier, RD sampler and other tool systems can be used for cross-span perforation, testing, reservoir reconstruction, post-transformation testing, etc. ‑1 Well testing, production testing, and sampling are conducive to obtaining accurate formation parameters; in addition, under the premise of retaining the pressure relief chamber, the pipe string is equipped with rod-throwing ignition and parallel explosion-transfer pressure at the same time above the perforating gun. The two ignition methods of delayed ignition can not only slow down the damage to downhole instruments and meters caused by the high pressure at the moment of perforation, but also avoid complex operations such as salvage and rod throwing after the rod throwing ignition fails. This technology can simplify the process, reduce labor intensity, save construction period, improve construction efficiency and success rate.

Description

technical field [0001] The invention relates to the technical field of oil and gas well testing, in particular to a full-diameter spanning perforation-testing combined operation method and a pipe string thereof. Background technique [0002] At present, in the oil and gas well testing technology field, the oil testing technology closest to the present invention is "annulus pressurized ignition type straddling perforation-testing joint operation" and "spanning testing stick perforation joint operation" technology. [0003] The technology of "annulus pressurized ignition straddle perforation-test combined operation" uses two-pole packers, and the perforating gun is placed between the two-pole packers. A bypass-type straddle packer is adopted. The typical feature of the bypass-type straddle packer is that there is a pressure transmission tube inside the bypass packer. The pressure transmission tube transmits the annular pressure to the ignition head, and the pressure transmissi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/26E21B43/28E21B43/27E21B43/117E21B43/1185E21B47/06E21B49/08
CPCE21B43/117E21B43/1185E21B43/26E21B43/28E21B47/06E21B49/081
Inventor 张卫华
Owner 营口市双龙射孔器材有限公司
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