Apparatus for testing rock drillability under stratum condition

A technology of stratum conditions and testing instruments, which is applied in the direction of earthwork drilling and production, wellbore/well components, etc., can solve problems such as large measurement errors, missing, sealing failure of seals, etc., and achieve the effect of improving measurement accuracy and efficiency

Active Publication Date: 2011-04-13
CHINA PETROLEUM & CHEM CORP
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Problems solved by technology

Although it is more realistic to test the dynamic physical characteristics of rock formations, there are dynamic seals connected inside and outside the kettle, and these seals are likely to cause seal failure, resulting in

Method used

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  • Apparatus for testing rock drillability under stratum condition
  • Apparatus for testing rock drillability under stratum condition

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Embodiment Construction

[0020] see figure 1 The present invention comprises a clamping mechanism, a pressure balance mechanism and a power mechanism, the clamping mechanism, the pressure balance mechanism and the power mechanism are interrelated and rely on each other, the clamping mechanism is arranged at the lower end of the pressure balance mechanism, and the power mechanism is arranged at the pressure balance mechanism and the clamping mechanism. within the holding institution.

[0021] The clamping mechanism is composed of a holder kettle body 5, a taper sleeve 7, a rubber sleeve 4, an upper plunger 8 and a lower plunger 2, and a heater 18 is installed on the outer circumference of the holder kettle body 5, and the heater 18 is controlled by temperature. The controller controls the temperature of the holder body to simulate the formation high temperature. The rubber sleeve 4 and the lower plunger 2 are sequentially arranged in the holder body 5, the lower plunger 2 is arranged at the inner bott...

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Abstract

The invention discloses an apparatus for testing rock drillability under a stratum condition, which comprises a clamping mechanism, a pressure balancing mechanism and a power mechanism, wherein the clamping mechanism is arranged at the lower end of the pressure balancing mechanism; the power mechanism is arranged in the pressure balancing mechanism and the clamping mechanism; the clamping mechanism consists of a clamp holder kettle body, a taper sleeve, a rubber sleeve, an upper plunger and a lower plunger; the pressure balancing mechanism consists of a wellhole pressure kettle body, a bit pressure kettle body and a bit pressure piston; and the power mechanism consists of a motor, a speed reducer, a canine impacter and a drill stem. The testing apparatus, which adopts the structure of mechanical-electrical integration, can test the rock drillability really and accurately by simulating the temperature, confining pressure, pore pressure and wellhole slurry pressure under the stratum condition, particularly the overlying confining pressure, pore pressure and wellhole slurry pressure of over 90 MPa of strata, and therefore has a more practical instruction significance for well drilling construction.

Description

technical field [0001] The invention belongs to oil / natural gas exploitation equipment, in particular to a rock drillability tester under stratum conditions, which is an essential equipment for studying rock drillability by simulating stratum condition drilling in oil / gas exploitation engineering. Background technique [0002] In oil / gas drilling engineering, in order to choose a reasonable drill bit and drilling process, it is necessary to know the drillability of rock. Because the drillability of rock is not only related to the mechanical strength of the rock itself, but also closely related to the drilling technology, especially the rock temperature, in-situ stress state, mud drilling, gas drilling, over-balanced drilling or under-balanced drilling have a great influence on the drilling speed. It is very easy to cause the rock drillability grading measured indoors cannot be applied to field drilling. [0003] For this reason, many oil / gas drilling equipment companies are...

Claims

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Application Information

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IPC IPC(8): E21B49/00
Inventor 蒋祖军孟英峰徐进王世泽朱澄清肖国益李皋黎昌华陈一健朱化蜀严焱诚张国东康杰
Owner CHINA PETROLEUM & CHEM CORP
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