Method for maintaining oil-well cement
An oil well cement and cement technology, which is applied to instruments, ceramic molding machines, analytical materials, etc., can solve the maintenance of strip test blocks, cannot achieve constant pressure heating and constant pressure cooling, and cannot perform oil well cement flexural performance testing, etc. problems, to achieve the effect of automatically stabilizing the control pressure and increasing the evaluation conditions
Active Publication Date: 2013-11-20
JIAHUA SPECIAL CEMENT
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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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Abstract
The invention discloses a method for maintaining oil-well cement. The method is characterized by including steps of sample processing and installing, debugging, constant pressure temperature rising, pressure and temperature keeping, and constant pressure temperature lowering. A pressing method of equipment such as conventionally used air compressors, pressure pumps, solenoid valves and buffer tanks is replaced by the method which can perform constant pressure control, control pressure fluctuation precisely and control pressure automatically and stably. The actual control accuracy of the method for maintaining the oil-well cement can reach + / -0.25MPa while the standard pressure fluctuation is + / -0.345MPa according to requirements of GB10238-2005 or GB19139-2003, and therefore, the technological level which can be hardly achieved by conventional technologies of the solenoid valves and the like is reached.
Description
technical field [0001] The invention relates to the technical field of cement physical and mechanical performance detection, in particular to a maintenance method for oil well cement strength detection. 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 no fundamental...
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IPC IPC(8): B28B11/24G01N3/02
Inventor 陈东陈一健张伦平黎茜古安林阳运霞曾雪玲
Owner JIAHUA SPECIAL CEMENT