Rock debris cleaning tool and drilling tool for horizontal well
A technology of cuttings and tools, which is used in earth-moving drilling, flushing wellbore, wellbore/well components, etc. It can solve the problem that the effect of cleaning cuttings and improving drilling effect is not obvious, the rotation speed is low, and it is installed at the drill pipe. And other issues
Pending Publication Date: 2022-05-10
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
However, this tool rotates with the drill pipe at the same speed as the drill pipe, i.e. at a lower speed
Therefore, the tool is less effective at creating turbulence
On the other hand, in order to form a certain turbulent flow and carry out more effective rolling, the tool needs to have a relatively long length and can only be installed at the drill pipe
This makes the accumulation of cuttings still prone to occur near the drill bit
Therefore, the effect of this tool on cleaning cuttings and improving drilling effect is not obvious
Method used
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[0023] The present invention will be further described below in conjunction with accompanying drawing.
[0024] figure 1 The structure of the debris removal tool 100 according to one embodiment of the present invention is schematically shown. The cuttings cleaning tool 100 is especially suitable for deviated well sections and horizontal well sections of horizontal wells to avoid a large amount of cuttings deposition and ensure the smooth progress of the drilling process. When the cuttings removal tool 100 was put into use, figure 1 The left end is the end close to the wellhead, that is, the upper end; figure 1 The right end in the middle is the end near the bottom of the well, that is, the lower end.
[0025] Such as figure 1 As shown, the debris removal tool 100 generally includes a central shaft assembly, a rotating outer barrel 130 and a rotating drive mechanism 140 . The central shaft assembly includes an upper central shaft 120 and a lower central shaft 150 connected...
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The invention relates to a rock debris cleaning tool and a drilling tool for a horizontal well. The rock debris cleaning tool comprises a central shaft assembly, wherein the upper end and the lower end of the central shaft assembly are configured to be connecting ends used for being connected into a drilling tool; the rotating outer cylinder is arranged outside the central shaft assembly in a sleeving manner, an annular space is formed between the central shaft assembly and the rotating outer cylinder, and a flow stirring piece is constructed on the outer side wall of the rotating outer cylinder; and the rotary driving mechanism is arranged in an annular space between the rotary outer cylinder and the central shaft assembly and is connected with the rotary outer cylinder and the central shaft assembly, and the rotary driving mechanism is configured to be capable of driving the rotary outer cylinder to rotate relative to the central shaft assembly.
Description
technical field [0001] The invention relates to the technical field of oil and gas well drilling, in particular to a cuttings cleaning tool for horizontal wells. The invention also relates to a drilling tool comprising the cuttings removal tool. Background technique [0002] In the drilling process of horizontal wells, especially in the drilling process of the deviated well section and horizontal well section of horizontal wells, there are problems such as high trajectory control requirements, complicated stress on the pipe string and low density of drilling fluid allowed to be used. . This makes it difficult for the cuttings produced by drilling to be carried out of the wellbore by the drilling fluid, and it is easy to accumulate in the well. This causes the process of drilling tools to run into the well to be easily blocked, the operation is difficult, and the difficulty of cementing in the later stage is very great. In addition, especially when the wellbore is inclined...
Claims
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IPC IPC(8): E21B21/00
CPCE21B21/00
Inventor 刘彪刘晓民李双贵翟科军贾晓斌罗发强张俊王居贺李少安李文霞刘景涛于洋钟文建李光乔陈培亮
Owner CHINA PETROLEUM & CHEM CORP