Radial jet bit pressure controller and bit pressure controlling method
A radial jet and controller technology, which is applied in the direction of earthwork drilling and production, wellbore/well components, etc., can solve the problems of affecting the motor, difficult drilling pressure, and increasing the difficulty of window opening operations, so as to improve the success rate and efficiency, The effect of stabilizing the application of drilling pressure and solving the difficulty of window opening operation
Active Publication Date: 2015-09-30
CHINA NAT OFFSHORE OIL CORP +1
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Problems solved by technology
However, since the motor is in the downhole, the vibration of the drill bit and pipe string will affect the control of the motor on the WOB when the window is opened, and it is difficult to effectively control the WOB on the ground, making it difficult to effectively control the WOB and apply the WOB stably, increasing the The difficulty of window opening operation reduces the success rate and efficiency of this process, and it is easy to cause equipment damage and economic loss
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[0020] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. And the features in the embodiments can be combined with each other.
[0021] The core of the present invention is to provide a radial jet pressure-on-bit controller and a weight-on-bit control method, which can effectively control the weight on bit and apply the weight on bit stably.
[0022] Such as figure 1 As shown, the radial jet pressure-on-bit controller of the present invention includes an upper joint 1, a spring 3, a bearing sleeve 4, a central pipe 5, a sliding sleeve 6, and a lower joint 7, and the upper joint 1 is fixedly connected at the center On the upper end of the pipe 5, there are multiple upper sealing rings 2 arranged between the upper joint 1 and the central pipe 5, and the sealing rings 2 are used to c...
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The invention discloses a radial jet bit pressure controller which comprises an upper joint (1), a spring (3), a force bearing sleeve (4), a central tube (5), a sliding sleeve (6) and a lower joint (7), wherein the upper joint (1) is fixedly connected to the upper end of the central tube (5), the central tube (5) is arranged in the force bearing sleeve (4), the upper end surface of the force bearing sleeve (4) and the lower end surface of the upper joint (1) are in limit fit, the sliding sleeve (6) is glidingly arranged in the lower section of the force bearing sleeve (4), the lower joint (7) is fixed at the lower end of the sliding sleeve (6), the central tube (5) is sleeved with the spring (3), and two ends of the spring (3) are propped between the force bearing sleeve (4) and the sliding sleeve (6). By means of ballast control by the spring, application of the bit pressure is stable and controllable, the technical problem of difficulty in window cutting operation due to instable bit pressure is solved, and the success rate and efficiency of the radial jet drilling technology are increased. The invention further discloses a bit pressure controlling method.
Description
technical field [0001] The invention belongs to the technical field of drilling, and in particular relates to a radial jet pressure-on-bit controller and a pressure-on-bit control method. Background technique [0002] Radial jet drilling technology is a new technology for oil layer stimulation and production increase that has emerged in the world in recent years. The principle of the process is: use the coiled tubing with nozzles, and use the hydraulic rock-breaking effect of high-pressure jets to drill multiple small holes in different directions in the oil layer, penetrate the pollution zone laterally, increase the drainage area of the original well, and increase the size of the original well. The discharge radius and area of the eye can be adjusted to reduce oil flow resistance and increase production. During the implementation of this process, the motor is anchored in the tubing, the motor controls the drilling pressure, and the inner screw advances while rotating a...
Claims
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IPC IPC(8): E21B29/06
Inventor 谢玉洪王尔钧马勇新宋立志简成许发宾颜明韩成梁玉斌阳俊龙
Owner CHINA NAT OFFSHORE OIL CORP