Drill bit tilting static pointing type rotary steering tool
A rotary-steering, directional technology, applied in the field of drilling tools, can solve problems such as increasing the build-up rate, achieve strong build-up capability, achieve build-up effect, and large build-up effect
Inactive Publication Date: 2018-12-07
徐芝香
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Problems solved by technology
However, a key technical indicator of existing rotary steerable tools—the build-up rate—has no advantage over traditional slide-steerable drilling tools. and other positions have to continue to use traditional slide steerable drilling tools to increase the build-up rate
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[0035] It should be noted that, in the case of no conflict, the embodiments of the present invention and the technical features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0036] Combine below Figure 1 to Figure 8 , the preferred embodiments of the present invention will be described in further detail.
[0037] Such as figure 1 As shown, the cross-section of the tilted-head static pointing rotary steerable tool passing through the axis of the drill string 3 and the tilted-head static pointing rotary steerable tool axis in the state of deflection is described. The front end of the tilting head static pointing rotary steering tool is inclined to one side and deviates from the axis of the drill string 3, which can cause a deflection effect.
[0038] The rear end of the base 2 is fixedly connected to the drill string 3, which is used to fix the tilting he...
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The invention relates to a well drilling tool in the oil and natural gas drilling and exploration field, in particular to a drill bit tilting static pointing type rotary steering tool. The technical problem needing to be solved is how to increase the deflecting effect. According to the technical scheme, a drill bit is made to deviate from the axis of a drill string, single-side deflecting rate isincreased, deflecting is conducted by coordinating with a deflecting mechanism, and therefore the total singe-side deflecting rate is increased. The drill bit tilting static pointing type rotary steering tool is characterized by comprises a base, a central spindle, a universal spindle coupling, an outer cylinder, the deflecting mechanism and a self-aligning bearing. The base is connected with theuniversal spindle coupling; the universal spindle coupling is connected with the central spindle; the universal spindle coupling is fixedly connected with the drill bit; the rear end of the outer cylinder is rotatably arranged on the base in a sleeving mode, and the front end of the outer cylinder is rotatably connected to the central spindle in a sleeving mode; the deflecting mechanism is arranged between the central spindle and the outer cylinder; and the self-aligning bearing is arranged between the central spindle and the outer cylinder. The front end of the drill bit tilting static pointing type rotary steering tool tilts towards one side. The drill bit tilting static pointing type rotary steering tool has the beneficial effects that when the deflecting effect generated by the fact that the drill bit tilts towards an one side well wall and the deflecting effect generated by the deflecting mechanism are placed on the same side of the well wall, the two deflecting effects are added,and a larger deflecting effect is generated.
Description
technical field [0001] The invention relates to a drilling tool in the field of oil, natural gas and other drilling, and is a tilting head static pointing rotary steering tool. Background technique [0002] With the development of ultra-deep wells, high-difficulty directional wells, cluster wells, horizontal wells, extended-reach wells, branch wells and wells with complex three-dimensional structures, rotary steering tools have better hole purification effects, higher precision of wellbore trajectory control, and displacement The extension ability is stronger, gradually replacing the traditional sliding guide tool. However, a key technical indicator of existing rotary steerable tools—the build-up rate—has no advantage over traditional slide-steerable drilling tools. Such positions have to continue to use traditional slide steerable drilling tools to increase the build-up rate. [0003] Therefore, it is necessary to invent a new rotary steerable tool to increase the kick-of...
Claims
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IPC IPC(8): E21B7/06
CPCE21B7/06
Inventor 邱世军
Owner 徐芝香