Reamer with self-centralizing and guiding functions
A technology of guiding function and reamer, applied in drilling equipment and methods, drilling equipment, earth-moving drilling, etc., can solve the problems of reamer falling, unfavorable pipeline dragging, increasing the risk of drill pipe fracture, etc.
Active Publication Date: 2020-02-04
SICHUAN GASOLINEEUM CONSTR ENG
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Problems solved by technology
[0003] When common large-scale directional drilling is used for reaming, the existing large-diameter reamers have a tendency to fall when reaming due to their heavy weight, especially when multi-stage reaming has a greater impact on the shape of the channel. Most of them are pear-shaped holes with small top and big bottom. The quality of hole formation is not conducive to the back-tow of the pipeline, which seriously affects the success rate of back-tow and the anti-corrosion layer of the pipeline. Especially for soft geology such as sand and mudstone, the tendency to form pear-shaped holes is more obvious
At the same time, this kind of reamer does not have the function of self-righting and guiding, and an external centralizer is needed to guide the reamer along the axis of the tunnel.
Method used
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[0028] Hereinafter, a reamer with a self-righting guide function of the present invention will be described in detail with reference to exemplary embodiments and accompanying drawings. It should be noted that "first", "second", "third", etc. are only for convenience of description and distinction, and should not be understood as indicating or implying relative importance. "Left", "right", "inner" and "outer" are only for convenience of describing and constituting a relative orientation or positional relationship, and do not indicate or imply that the referred components must have the specific orientation or position.
[0029] figure 2 A structural schematic diagram showing an exemplary embodiment of a reamer with a self-righting guiding function according to the present invention; image 3 show figure 2 Schematic diagram of the structure of the centering barrel cavity.
[0030] In this example, if figure 2 As shown in , the hole reamer with self-righting guiding functio...
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Abstract
The invention provides a reamer with self-centralizing and guiding functions. The reamer includes a spindle, a plurality of gear wheels, a plurality of centralizing ribs, one or more gear wheel reinforcing ribs, a base and a centralizing barrel, wherein the base and the centralizing barrel are successively fixed to the spindle in a sleeving mode, the spindle includes a first medium flow channel, asecond medium flow channel and a shaft body, and the base is provided with an inner cavity, a plurality of gear wheel seats and third medium flow channels with the number equal to that of the multiple gear wheel seats; the multiple gear wheels are fixedly arranged on the multiple gear wheel seats, and the one or more gear wheel reinforcing ribs are arranged on the right side of the base and are capable of connecting the base or each gear wheel and the shaft body of the spindle; the centralizing barrel is hermetically and fixedly connected with the left side of the base and part of the shaft body of the spindle to form a gas cavity capable of being used for air inflation to generate buoyancy; and the multiple centralizing ribs are all arranged on the outer barrel wall of the centralizing barrel. The reamer has the advantages of simple structure, the self-centralizing and guiding functions, reduction of the fracture risk of a drill pipe and the like.
Description
technical field [0001] The invention relates to the directional drilling and crossing construction of large long-distance pipelines in the surface construction of oil and gas pipelines in oil and gas fields, and belongs to the technical field of drilling or drilling engineering. Specifically, it relates to a hole reamer with a self-righting guiding function. Background technique [0002] At present, because the horizontal directional drilling mainly traverses the strata within 30m from the ground, the stratum fragmentation is complicated, especially the soil entry and excavation sections close to the ground are mostly weathered or fully weathered strata, which brings great difficulties to the reamer and reaming process. difficulty. However, the existing horizontal directional drilling construction requirements continue to increase, and there are more and more directional drilling projects with a diameter of 1000mm and above, and the requirements for reamers are also increas...
Claims
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Login to View More IPC IPC(8): E21B7/28E21B10/34E21B17/10
CPCE21B7/28E21B10/345E21B17/1078
Inventor 张杰王学军叶文建徐云川郎明春邱德璟
Owner SICHUAN GASOLINEEUM CONSTR ENG