A plugging tool while drilling
A technology of plugging while drilling and tools, applied in drill pipe, drill pipe, earthwork drilling, etc., can solve problems such as affecting drilling time efficiency, increasing operation risk, and increasing the difficulty of plugging, so as to improve work efficiency and economic benefits, reduce Small job risk, simple structure effect
Active Publication Date: 2019-08-23
YANGTZE UNIVERSITY
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Problems solved by technology
Activation by throwing balls needs to increase ground throwing equipment, prolong working hours, increase costs, and also affect the inner diameter of the drill string and reduce the flow rate. The plugging tool controlled by throwing balls will also affect the running of other tools, because throwing balls needs to be started frequently Drilling down not only affects the drilling timeliness and prolongs the drilling cycle, but also increases operational risks
At the same time, on the other hand, due to the structure of the existing plugging tools, the plugging fluid is directly sprayed on the well wall, which causes damage to the well wall to a certain extent and increases the difficulty of plugging
Method used
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Embodiment Construction
[0019] The LWD plugging tool includes an overall seal, a flushing part and a housing assembly; the flushing part is composed of a part body 1, an actuator 2, a signal receiver 5, an internal hole valve 3 and a port valve 4; the part body 1 is a ladder Cylindrical, the component body 1 is provided with a stepped through hole, the through hole is equipped with an internal orifice valve 3, and one side of the internal orifice valve 3 is provided with an actuator 2, and the actuator 2 is connected to the internal orifice valve 3. A port valve 4 is installed above the internal orifice valve 3 through a spring 6 , and a signal receiver 5 is installed on the component body 1 on one side of the port valve 4 , and the signal receiver 5 is electrically connected with the actuator 2 . The signal receiver 5 is used to receive ground wireless signal commands, and control the opening and closing of the internal orifice valve 3 through the actuator 2 . The top of the port valve 4 is fixed wi...
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The invention relates to a while-drilling leakage blocking tool, and belongs to the technical field of petroleum downhole operation tools. The while-drilling leakage blocking tool comprises a main sealing part, a flushing part and a casing assembly, and is characterized in that the casing assembly is fixedly arranged on the flushing part; the main sealing part is arranged on the circumference of the lower end of the casing assembly. The while-drilling leakage blocking tool has the advantages that the structure is simple, and the practicality is good; by using a wireless video identification technique to control, infinite times of activating of an internal hole valve is realized, the additional arrangement of ground ball feeding equipment is not needed, the cost is reduced, the influence to a through diameter in a drill string is avoided, the operation risk is reduced, and the influence to the descending of other tools is avoided; the while-drilling leakage blocking tool is especially suitable for the while-drilling leakage blocking and circulating well flushing operation in drilling and well completion processes due to the influence of stratum conditions and the like, and has positive meaning on improving the working efficiency and economic benefit.
Description
technical field [0001] The invention relates to a plugging tool while drilling, belonging to the technical field of oil well operation tools. Background technique [0002] In drilling operations, lost circulation seriously restricts the drilling speed. Various complex situations are directly related to lost circulation and cause huge economic losses, especially the main reason for the high cost of drilling fluid. The control of lost circulation is related to the exploration and development process. It has always been a special concern of domestic and foreign petroleum engineering circles. Due to the complex causes of leakage and many restrictive factors, it has become a major technical problem that has not been completely solved in drilling and completion projects at home and abroad. [0003] In order to solve the above technical problems, ball-throwing-activated plugging tools are usually used. This method is a pure ball-throwing hydraulic type, that is, on the basis of ba...
Claims
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IPC IPC(8): E21B33/12E21B21/00E21B17/10
CPCE21B17/10E21B21/00E21B33/12
Inventor 刘少胡毕圆圆管锋付小玲阳婷
Owner YANGTZE UNIVERSITY