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Novel spiral drilling rig structure

A screw drilling tool, a new type of technology, is applied in drilling equipment, directional drilling, earthwork drilling and production, etc. It can solve the problems of excessive size of the whole machine, reduce the hydraulic power of the drill bit, and large pressure drop consumption, etc., and achieve low maintenance costs in the later period. The effect of improving drilling efficiency and reducing drilling cost

Inactive Publication Date: 2012-05-23
常萍
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AI Technical Summary

Problems solved by technology

With the development of sealed roller cone bits and the improvement of jet drilling technology, turbodrills have exposed the following prominent fatal weaknesses: high output speed, which exceeds the best rated operating speed range of roller cone bits (100-270r / min); The consumption is large, which reduces the water horsepower of the drill bit, which affects the cleaning of the bottom of the well and the rock breaking effect of the drill bit; the size of the whole machine is too long, which cannot meet the drilling process requirements of directional wells and highly deviated wells; the power is low
In addition, the assembly and adjustment of the compound turbodrill are troublesome

Method used

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Embodiment

[0021] Such as figure 1 As shown, the present invention is mainly composed of a bypass valve assembly 1, a motor assembly 2, a cardan shaft assembly 3, and a transmission shaft assembly 4 which are connected in sequence.

[0022] The bypass valve assembly 1 is an auxiliary part of the screw drilling tool. Its function is to communicate the inner space of the drill string with the annulus when the pump is stopped, so as to avoid drilling fluid spillage and pollution in the drill string when tripping out and replacing a single screw. Drill floor, affecting normal work. The bypass valve is composed of valve body, valve core, spring, sieve plate and so on. When the pump is turned on, the drilling fluid pressure forces the valve core to move downward, causing the spring to compress and close the channel on the valve body (generally, there are 5 channel holes evenly distributed along the circumference, and a sieve plate is installed to filter foreign matter). Drilling fluid can be...

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Abstract

The invention discloses a novel spiral drilling rig structure. The novel spiral drilling rig structure mainly comprises a by-pass valve assembly (1), a motor assembly (2), a universal shaft assembly (3) and a transmission shaft assembly (4) which are connected sequentially. The novel spiral drilling rig structure is simple and low in manufacturing cost and later maintenance cost, improves the drilling efficiency, shortens the drilling period, reduces the drilling cost, and has very obvious economic significance.

Description

technical field [0001] The invention relates to a novel screw drilling tool structure. Background technique [0002] With the rapid development of the national economy, the demand for oil resources is increasing. Facing the trend of economic globalization and internationalization of the domestic market, the exploration and development of oil and gas resources must pursue high returns on investment and rapid recovery of funds. A batch of high-efficiency and low-cost drilling new technologies will develop rapidly. [0003] In recent years, my country's oil and gas drilling technology has made great progress. Directional wells, horizontal wells, and multilateral well technologies have improved the drilling success rate and economic benefits, and at the same time promoted the development and application of downhole dynamic drilling tools. In addition, technologies such as slimhole drilling, casing window sidetracking, rotary steerable drilling, and coiled tubing drilling have...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B4/00E21B4/04E21B7/04E21B7/06
Inventor 常萍
Owner 常萍
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