Oil well cement maintenance kettle

Abstract

The invention discloses an oil well cement maintenance kettle which comprises a box, a kettle body and a control panel, wherein the control panel is arranged on the box, the box is provided with a kettle body installing cavity and also comprises a constant-pressure control system, the constant-pressure control system comprises a back pressure controller, a back pressure accumulator and a connecting pipeline I, the back pressure controller is communicated with the kettle body through the connecting pipeline I, the connecting pipeline I is communicated with a connecting pipeline II, one end of the connecting pipeline II is communicated with the connecting pipeline I, and the other end of the connecting pipeline II is communicated with the back pressure accumulator; the connecting pipeline I is provided with a pressure control valve, the connecting pipeline II is provided with a back pressure booster valve, the connecting pipeline II is also communicated with a connecting pipeline III, the connecting pipeline III is provided with a back pressure dropping valve, and the pressure control valve, the back pressure booster valve and the back pressure dropping valve are all arranged on the control panel. According to the invention, due to the utilization of the constant-pressure control system, the actual control precision of the oil well cement maintenance kettle can be up to + / - 0.25 MPa.

Description

technical field [0001] The invention relates to the technical field of equipment for testing physical and mechanical properties of cement, in particular to a curing kettle for testing the strength of oil well cement. Background technique [0002] The oil well cement curing kettle is an instrument and equipment used to provide a high temperature and high pressure curing environment for testing the strength of oil well cement. Its technical requirements comply with API Spec 10A. my country's GB10238-2005 is equivalent to the standard content of API Spec 10A, oilfield users use API RP 10B, and my country's GB19139-2003 is equivalent to the standard content of API RP 10B. At present, the curing kettle of CANDLER company is generally used in the world, and the typical model is 7370. Some manufacturers in Shenyang and other places in my country have digested foreign technology and produced curing kettles by themselves. Although there have been some improvements, there has been n...

AI Technical Summary

Problems solved by technology

The disadvantages of this patent are: 1. Only the cubic test block for testing the compressive performance of oil well cement can be maintained, but the strip test block for testing the flexural performance of oil well cement cannot be maintained; 2. During the maintenance process , cannot achieve constant pressure heating and constant pressure cooling, which does not meet the requirements of GB10238-2005 or GB19139-2003

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