While-drilling pressure torque gauging nipple
A technology of torque measurement and short joints, applied in the direction of measurement, torque measurement, measurement device, etc., can solve the problems of poor sealing, wear resistance and erosion resistance, and achieve the purpose of solving wear, ensuring long-term stability, reducing Erosion and wear effects
Active Publication Date: 2015-05-27
CHINA PETROCHEMICAL CORP +4
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Problems solved by technology
Compared with the prior art, the measurement nipple overcomes the defects of the downhole drilling weight torque measurement nipple in terms of poor sealing, wear resistance and erosion resistance; the invention has a simple structure and can conveniently realize the measurement nipple section replacement, and can be easily connected to different measurement positions near the drill collar
Method used
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Embodiment Construction
[0020] Now combined with the manual figure 1 , attached figure 2 , to further describe the present invention.
[0021] figure 1 Indicates the overall structure when the WOB torque measurement nipple is connected with the upper connecting drill collar 1, the lower connecting drill collar 10, and the diversion sleeve assembly 3. Among them, the measurement sensitive area 13 is used to stick the pressure-on-bit measuring strain gauge 20 and the torque measuring strain gauge 19. For the sticking method of the strain gauge, refer to figure 2 . The lead wires of the strain gauges are led out through the wire holes 16 to be connected to the secondary conversion circuit 18 , and the wire holes are sealed by the high-voltage sealing cover plate 17 . After the strain gauge pasting, internal connection, and lead wires are completed, the processing of the first layer of sealing 6 is carried out. After the specified time, the processing of the second layer of sealing 7, the third lay...
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The invention provides a while-drilling pressure torque gauging nipple. A conical internal thread is machined at the upper part of the nipple; a conical external thread is machined at the lower part of the nipple; the external middle part of the nipple is machined into four annular grooves which are small inside and big outside; a circular hole is formed in one part of the nipple from the lower end to the middle part; an internal protective sleeve is mounted in the hole; a flow guide sleeve assembly is mounted in the middle of the interior of the nipple toward the upper part; a secondary conversion circuit is mounted in the flow guide sleeve assembly; the flow guide sleeve assembly is fixedly connected with the gauging nipple through a flow guide sleeve fixing bolt; sealing in four layers are arranged outside a gauging sensitive area; and hard alloy sheets are mounted at upper and lower edges of the gauging sensitive area along a circumference. Through the adoption of a rubber vulcanizing and glass fiber reinforced plastic filling technology, a sensing part of the gauging nipple is sealed in a plurality of layers; and as the internal protective sleeve is mounted inside the gauging nipple, and the hard alloy sheets are embedded outside the gauging nipple, long-time stability of the performance of the nipple is guaranteed. The gauging nipple provided by the invention has the advantages of simple structure, good sealing performance and good wear resistance.
Description
Technical field: [0001] The invention relates to a measuring sub-joint used in downhole pressure-on-drilling torque measurement while drilling in petroleum drilling engineering. Background technique: [0002] During the drilling process, the accurate measurement of drilling engineering parameters such as the drilling pressure and torque near the drill bit is very important for safe and efficient drilling. With the increase of drilling depth, especially in the development of various branch wells and horizontal wells, various drilling accidents such as stuck pipe, cone loss, and drill tool breakage occur from time to time, which brings great impact to the safety and efficiency of drilling production. Real-time measurement of changes in drilling engineering parameters such as WOB torque near the drill bit can effectively prevent such accidents and provide technical support for safe and efficient drilling. [0003] Most of the well-known drilling monitoring technologies use sur...
Claims
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IPC IPC(8): E21B47/00E21B47/017E21B47/06E21B17/16E21B17/02G01L3/00
Inventor 张海花杨锦舟耿艳峰崔海波李闪
Owner CHINA PETROCHEMICAL CORP