A Device for Measuring Radial Volume Deformation of Bed-Drilling Boreholes
A technology of volume deformation and measurement device, which is applied in the directions of measurement, earthwork drilling and production, wellbore/well parts, etc., can solve the problems of high price, and achieve the effects of convenient operation, safe and effective propulsion, and simple structure
Inactive Publication Date: 2016-08-17
CHINA UNIV OF MINING & TECH
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Problems solved by technology
However, some existing measuring instruments and devices are expensive, and there are many problems in the measuring process. It is necessary to develop a measuring device that is easy to install and operate, accurate in measurement, and low in price.
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Embodiment Construction
[0010] An embodiment of the present invention will be further described below in conjunction with accompanying drawing:
[0011] Such as figure 1 As shown, the device for measuring the radial volume deformation of the layer-by-layer drilling of the present invention mainly includes a propeller 1, a plastic bag 2, a rubber plug 3, a protective steel pipe 4, an exhaust pipe valve 5, an exhaust pipe 6, a water pipe 7, a drain Pressure valve 8, measuring cylinder 9, water pipe valve 10 form. The propeller 1 described propeller 1 is made of rigid material, and it comprises a conical head, a collar with the same diameter as the circular end face of the conical head. The ends of the heads are connected to form the connecting rod of the frame, and the other side of the collar is provided with a protective steel pipe 4, and the plastic bag 2 is placed in the frame between the tapered head and the collar, and the plastic bag is protected when the frame advances in the layer-by-layer dr...
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The invention discloses a radial volume deformation measuring device for bedding drilling. The radial volume deformation measuring device comprises a propeller, a rubber bag, a rubber plug, a protective steel pipe, an exhaust pipe, en exhaust pipe valve, a water pipe, a water pipe valve, a pressure release valve and a measuring cylinder, wherein the rubber bag is placed inside the propeller, the side part of the rubber plug is connected with one end of the rubber bag, one end of the water pipe stretches into the rubber bag through the rubber plug, the other end of the water pipe is connected with the water pipe valve and the pressure release valve respectively, one end of the protective steel pipe is connected with the propeller, and the measuring cylinder is connected with one end of the water pipe. The radial volume deformation measuring device for bedding drilling is simple in structure, ingenious in design, and convenient to use; when the radial volume in drilling changes, the hole wall presses the rubber bag to discharge water, the water flows into the measuring cylinder, and the radial volume deformation in drilling can be learned by measuring the volume of the water discharged by the rubber bag.
Description
technical field [0001] The invention relates to a measuring device for the radial volume deformation of coal seam boreholes along the bedding, which is especially suitable for measuring the radial volume deformation of boreholes in the process of gas extraction through the bedding boreholes of soft and protruding coal seams. Background technique [0002] The pre-extraction of coal seam gas by drilling along the bedding is very important in the control of coal mine gas, especially in the prevention and control of coal and gas outburst. The coal quality of the protruding coal seam is soft, and the bedding boreholes in it are prone to collapse and deformation, which will cause borehole blockage, affect the extraction efficiency, and then affect the final gas control effect. For this reason, it is necessary to conduct on-site measurement of the collapsed hole position, collapse time, and radial volume deformation of the borehole in the bedding borehole, and determine the distrib...
Claims
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IPC IPC(8): E21B47/00E21B47/017
Inventor 周红星张荣程远平杨泉林代昊陈明义赵伟涂庆毅
Owner CHINA UNIV OF MINING & TECH