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Device for simulating casing-cement sheath damage indoor test under stratum action

A simulation test, cement sheath technology, applied in wellbore/well components, earthwork drilling and production, etc., can solve problems such as the inability to truly simulate the formation sliding action, the inability to consider the casing and cement sheath as a whole, etc.

Inactive Publication Date: 2010-06-09
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing tests cannot take the casing and cement sheath into consideration as a whole, nor can they truly simulate the relative sliding effect between formation layers

Method used

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  • Device for simulating casing-cement sheath damage indoor test under stratum action
  • Device for simulating casing-cement sheath damage indoor test under stratum action
  • Device for simulating casing-cement sheath damage indoor test under stratum action

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Embodiment Construction

[0016] Describe the present invention in detail below in conjunction with accompanying drawing:

[0017] An indoor simulation test device for casing-cement sheath damage under formation action, see attached figure 1 , attached figure 2 And attached image 3 , in the figure: casing 1, cement sheath 2, reinforcing plate 3, reinforced steel casing 4, guard plate 5, box frame 6, upper positioning plate 7, pullable movable layer 8, actuator connector 9, Second stiffener 10, lower positioning plate 11, fixed base 12, glideway 13, upper slideway 14, first stiffener 15, reaction wall connector 16; mold base 17, base 18, lower positioning base 19, steel pipe 20. Clamping steel plate 21, circular baffle plate 22, slurry inlet hole 23, exhaust hole 24, circular support plate 25, first slurry inlet hole 26, cylindrical upper cover 27, guide column 28, upper positioning support 29 , fixed steel plate 30, reserved hole 31.

[0018] The embodiment of the present invention consists of a ...

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Abstract

The invention relates to a simulation test device in petroleum extraction industry, in particular to a device for simulating a casing-cement sheath damage indoor test under stratum action. The device comprises a stratum action simulator and a well cementing casing-cement sheath indoor simulation maker. A case frame is connected with a multi-layer case formed by cover sheets; the bottom layer and the top layer of the multi-layer case are fixed layers, and the middle layer is a drawable movable layer; the internal space of the case frame is provided with a reinforcing steel casing by a reinforcing plate connected with the case frame, wherein the reinforcing steel casing is arranged section by section, and the number of the sections is coincident with that of the layers of the multi-layer case; a mould base is provided with a steel tube; a packing space is reserved between the casing and the steel tube; the casing is supported with a circular baffle on which slurry inlet holes and gas vents are evenly arranged; a tubular upper cover is arranged above a support plate; and the gyration centre of the support plate is provided with a guide post. The invention can simulate the casing-cement sheath damage indoor test under stratum action, thereby providing the test basis for the cause of formation of oil well casing damage.

Description

Technical field: [0001] The invention relates to a simulation test device in the oil exploitation industry, in particular to an indoor simulation test device for casing-cement sheath damage under stratum action. Background technique: [0002] Casing damage is ubiquitous in the process of oil extraction, but because casing damage often occurs one thousand meters or even thousands of meters underground, on-site observation cannot be carried out, which makes indoor simulation tests particularly important. Compared with the failure test of ordinary steel pipes, there are two special points to be considered in the damage of oil production casing. One is that due to the needs of well cementing, the casing is bonded with the cement sheath to form a casing-cement sheath. The casing failure test that cannot include the cement sheath in the test will inevitably have a large error with the actual situation; the second is that the casing damage occurs underground, and the formation slip...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00
Inventor 朱庆杰陈艳华张玉敏廖永刁恒强李丽峰王占辉
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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