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A conveying mechanism for drilling
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A conveying mechanism and drilling technology, which is applied in the direction of earthwork drilling, wellbore/well parts, cleaning equipment, etc., can solve problems such as jamming, achieve the effect of reducing friction area, reducing friction area, and avoiding jamming
Active Publication Date: 2017-06-27
HUAZHONG UNIV OF SCI & TECH
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Abstract
Description
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Problems solved by technology
At present, the rig-free drilling technology does not have a drilling rig and a derrick, and the traditional way of discharging cuttings relying on water circulation cannot be applied, and a new method is needed to discharge cuttings
During the drilling process, the rock formations drilled by the drill bit are diverse, and the cuttings produced have various humidity and viscosity. In the absence of traditional drilling rigs and derricks, the traditional method of water injection to output cuttings cannot No longer applicable, it is necessary to use a new mechanism to transport these kinds of complex cuttings from the inside of the drill pipe
The vertical screw conveyor has a vertical conveying function. Using a general vertical conveyor to transport rock debris will cause rock debris to enter the inner and outer shafts for friction. The larger the transmission distance, the larger the friction area, which will eventually lead to jamming
Method used
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Embodiment 1
[0061] Such as Figure 1~Figure 9 , Figure 10 (a), Figure 10 (b), a conveying mechanism for drilling, including an upward feeding device and a threaded feeding device, wherein,
[0062] Upward feeding device, located below the threaded feeding device, used to send drill cuttings upwards into the threaded feeding device;
[0063] The threaded feeding device includes a threaded shaft 100 and a threaded housing 200, the threaded shaft 100 extends into the threaded housing 200, the threaded shaft 100 has an external thread, the threaded housing 200 has an internal thread, and the thread The major diameter of the external thread of the rotating shaft 100 is not greater than the minor diameter of the internal thread of the threaded housing 200.
[0064] Preferably, the external threads on the threaded shaft and the internal threads on the threaded housing are staggered to prevent being caught by drill chips.
[0065] In addition, the threaded housing 200 is sleeved in the supporting housin...
Embodiment 2
[0091] The screw feeding device of this embodiment is the same as that of Embodiment 1, but the structure of the upward feeding device is different.
[0092] The upward feeding device of this embodiment includes a fixed housing 23, a planetary gear train 24, a partially threaded housing 22 and an intermittent threaded shaft 21, and the fixed housing 23 is fixedly connected to the supporting housing 300 of the threaded feeding device. among them,
[0093] The fixed housing 23 is used to install in the rock and soil for support, and it cannot rotate when it is fixed in the circumferential direction, and it can be driven by other mechanisms to move axially;
[0094] The planetary gear train 24 includes a ring gear 244, a central sun gear 242, a planet carrier 241, and a plurality of planet gears 243, wherein the ring gear 244 is disposed on the inner wall of the fixed housing 23;
[0095] The partially threaded shell 22 is driven to rotate by a motor, and is located above the planet carr...
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Abstract
The invention discloses a conveying mechanism for drilling, which comprises an upward feeding device and a screw feeding device, wherein the upward feeding device is located below the screw feeding device, and is used to send drill cuttings upward into the screw feeding device; the screw feeding device The device includes a threaded shaft and a threaded casing, the threaded shaft extends into the threaded casing, the threaded shaft has external threads, and the threaded casing has internal threads; the threaded shaft can rotate relative to the threaded casing The cuttings inside the threaded housing are conveyed upwards to an external device. The present invention realizes the vertical transportation of drill cuttings with different viscosities and different water contents, avoids the problem of jamming, and prevents the drill cuttings from agglomerating into blocks due to the pressure below and their own viscosity during the transmission process and eventually blocking the passage. The problem.
Description
Technical field [0001] The invention belongs to the field of drilling equipment, and more specifically, relates to a conveying mechanism for drilling. Background technique [0002] With economic development, the number of oil and gas drilling has increased rapidly, which has also driven the need for changes in drilling methods. Conventional drilling requires drilling rigs, derricks, hoisting systems and turntables, which require a huge system to reduce drilling efficiency, and the boreholes to be drilled in the drilling process are relatively large, resulting in a waste of energy. The ultra-small borehole drilling method in rig-less drilling technology is a revolution in drilling technology. It does not require drilling rigs, derricks, lifting systems and turntables, and the boreholes are ultra-small boreholes, which greatly improves drilling efficiency and saves energy. . At this stage, rig-less drilling technology does not have rigs and derricks, and the traditional way of di...
Claims
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Application Information
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