Two-interface cementing strength testing device of cementing sheath containing hydrates and ice stratum

Abstract

The invention discloses a two-interface cementing strength testing device of a cementing sheath containing hydrates and an ice stratum. The testing device comprises a kettle shell base and a simulation sleeve which is vertically arranged in the middle of the kettle shell base. A polyvinyl alcohol membrane tube is arranged on the periphery of the simulation sleeve, an annular cavity is formed between the simulation sleeve and the polyvinyl alcohol membrane tube, a temperature control circulating bath sealing cover is arranged on the outer edge of the top of the kettle shell base in a surrounding mode, the position between the temperature control circulating bath sealing cover and the polyvinyl alcohol membrane tube is filled with a simulation stratum, the top of the simulation stratum is covered with a stratum kettle cover, the top of the simulation sleeve is covered with a pressurizing kettle cover which covers the top of the cavity, and a pressure device for pressurizing the pressurizing kettle cover is arranged above the pressurizing kettle cover. The testing device has the advantages that the structure is simple, installing and using are convenient, production cost is low, and a detection result is accurate and reliable.

Description

technical field [0001] The invention relates to equipment for testing the quality of well cement, in particular to a test device for the cement sheath-two interface bonding strength of well cementing in formations containing hydrates and ice. Background technique [0002] As oil and gas fields have higher and higher requirements for cementing quality, the corresponding cement slurry consolidation performance test and evaluation has received more and more attention, especially the cementation strength of the two interfaces has been paid special attention. At present, domestic and foreign evaluations are only made in terms of geophysical technologies such as acoustic / electromagnetic logging, and there are few simulation evaluation devices in the laboratory, and even if there are, they are very simple. The wall cement mortar pipe (thickness is generally 15-20cm) acts as a simulated formation, and then the drilling fluid is soaked in the inner wall of the cement sheath, and then...

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Problems solved by technology

In this regard, there is no corresponding experimental evaluation device at home and abroad, mainly because it is difficult to solve the problems of hydrate formation and temporary sealing support of the well wall

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