A wellhead tool for crushing large-scale downhole falling objects
A technology of large size and falling objects, which is applied in the direction of wellbore/well components, wellbore/well valve devices, sealing/packing, etc., and can solve problems such as affecting throttling efficiency, blocking wellhead, and formation blocks, etc., to achieve The effect of improving safety
Active Publication Date: 2022-04-29
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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Problems solved by technology
[0002] During the drilling of oil and gas wells, due to factors such as improper human operation and unknown formation information, it is very easy to have downhole falling objects such as formation blocks and cement sheath spalling at the casing shoe. When the diameter of such downhole falling objects is too large, return When the wellhead is blocked, there may be problems such as blocking the wellhead and affecting throttling efficiency
At present, in the on-site wellhead device, there is no crushing device specially for large-scale well fallouts, but the four-way is directly connected to the choke manifold. When drilling large-size well fallouts, the wellhead has potential well control risk
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[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0023] It should be noted that, in the case of no conflict, the embodiments in the present application and the technical features in the embodiments can be combined with each other.
[0024] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by those of ordinary skill in the art to which this application belongs.
[0025] In the present invention, the terms "first", "second" and the like are used to distinguish similar objects, rather than to describe a specific order or sequence, unless stated otherwise. The terms used should be understood as such; use of the terms "upper", "lower", "left", "right", etc. generally refers to the orientation shown in the drawings, or to the parts themselves in vertical, perpendicular or In terms of the direction of...
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The invention discloses a wellhead tool for crushing large-scale downhole falling objects, which includes an outer cylinder and an inner cylinder, the inner cylinder is rotatably arranged in the outer cylinder, and the outer cylinder includes an inlet section, a variable Diameter section one, straight cylinder section, variable diameter section two, outlet section, the inner diameters of the straight cylinder section and the inner cylinder are larger than the inner diameters of the inlet section and the outlet section, on the inner wall of the outer cylinder close to the outlet section A fixed ring is provided, the center of the fixed ring is provided with a thimble protruding toward the inlet section, the inner wall of the inner cylinder is provided with a falling object crushing device, and the falling object crushing device includes a base and a The conical teeth on the top, the closer to the base of the outlet section, the closer to the thimble, and the base is provided with a plurality of channels parallel to the central axis of the inner cylinder. The invention can crush large-sized downhole falling objects at the wellhead, further improving the safety and stability of wellhead control.
Description
technical field [0001] The invention relates to the technical field of oil and gas wells, in particular to a wellhead tool for crushing large-scale downhole falling objects. Background technique [0002] During the drilling of oil and gas wells, due to factors such as improper human operation and unknown formation information, it is very easy to have downhole falling objects such as formation blocks and cement sheath spalling at the casing shoe. When the diameter of such downhole falling objects is too large, return When the wellhead is blocked, there may be problems such as blocking the wellhead and affecting throttling efficiency. At present, in the on-site wellhead device, there is no crushing device specially for large-scale well fallouts, but the four-way is directly connected to the choke manifold. When drilling large-size well fallouts, the wellhead has potential well control risk. Contents of the invention [0003] In view of the above problems, the present inven...
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IPC IPC(8): E21B41/00E21B34/02
CPCE21B41/0021E21B34/02
Inventor 刘璞胡中志吴欣袁张颖阳明君岳迎春
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING