一种具备防掉功能的高效造斜螺杆钻具

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By introducing a matching structure of anti-drop sleeve and anti-drop nut in the drive shaft assembly of the screw drill bit, the problem of easy breakage of the drive spindle was solved, and the safety and efficiency of the drilling process were improved.

CN224515124UActive Publication Date: 2026-07-17DEZHOU UNITED GASOLINEEUM MACHINERY

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: DEZHOU UNITED GASOLINEEUM MACHINERY
Filing Date: 2025-09-25
Publication Date: 2026-07-17

AI Technical Summary

Technical Problem

During oil drilling, the drive spindle of the screw drill bit is subjected to multidimensional loads and impact forces, which shortens its lifespan and makes it prone to fatigue fracture, especially during composite drilling, where safety is relatively low.

Method used

A high-efficiency directional drilling tool with anti-drop function was designed. By introducing an anti-drop sleeve and anti-drop nut cooperation structure in the drive shaft assembly, the lower end of the spindle can be hung on the anti-drop sleeve when it breaks. Combined with the thrust bearing and universal connector, the transmission stability and safety are ensured.

Benefits of technology

It effectively prevents the lower end of the drive spindle from breaking, improves drilling safety and the service life of the screw drill, and ensures the safe and efficient operation of the drilling process.

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Abstract

一种具备防掉功能的高效造斜螺杆钻具，包括马达总成及传动设于其下侧的传动轴总成；传动轴总成包括竖向设置的柱筒状传动轴壳体，以及竖向设置，且上端伸入传动轴壳体内部，下端伸出传动轴壳体的传动主轴，马达总成设于传动轴壳体上端，传动主轴上端通过万向连接件与马达总成传动连接；传动轴总成还包括防掉卡套，其上侧与传动轴壳体固定，下侧设有向内凸起的防掉凸台；传动轴总成还包括固定在传动主轴下端外圈的防掉螺母，防掉螺母的上端位于防掉卡套内，且外圈设有向外凸起的配合凸台，主轴下端发生疲劳断裂时，通过防掉卡套上防掉凸台与防掉螺母上配合凸台的配合，能够使主轴下端挂在防掉卡套上，有效保证了钻井安全性。

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Claims

1. A high-efficiency build-up screw drill with a drop-prevention function, characterized in that, It includes a motor assembly (1) and a drive shaft assembly (2) with the transmission located on its lower side. The drive shaft assembly (2) includes a vertically arranged cylindrical drive shaft housing (202) and a vertically arranged drive main shaft (213) with its upper end extending into the drive shaft housing (202) and its lower end extending out of the drive shaft housing (202). The motor assembly (1) is located at the upper end of the drive shaft housing (202), and the upper end of the drive main shaft (213) is connected to the motor assembly (1) via a universal connector (201). The drive shaft assembly (2) also includes an anti-drop sleeve (210), the upper side of which is fixed to the drive shaft housing (202), and the lower side is provided with an inwardly protruding anti-drop boss; The drive shaft assembly (2) also includes an anti-drop nut (212) fixed to the lower outer ring of the drive shaft (213). The upper end of the anti-drop nut (212) is located inside the anti-drop sleeve (210), and the outer ring is provided with an outwardly protruding mating boss.

2. The high-efficiency build-up screw drill with anti-drop function according to claim 1, characterized in that, The drive shaft assembly (2) also includes a lower bearing housing (209) fixed to the lower end of the drive shaft housing (202), and the anti-drop sleeve (210) is connected to the lower side of the lower bearing housing (209).

3. The high-efficiency build-up screw drill with anti-drop function according to claim 2, characterized in that, A thrust bearing (206) is also provided between the outer ring of the middle part of the transmission main shaft (213) and the transmission shaft housing (202).

4. A high-efficiency directional drilling tool with anti-drop function according to claim 3, characterized in that, The upper outer ring of the thrust bearing (206) is abutted against the transmission shaft housing (202) by the upper radial bearing outer sleeve (205), and the lower outer ring is abutted against the lower bearing housing (209) by the thrust ring (208).

5. The high-efficiency build-up screw drill with anti-drop function according to claim 3, characterized in that, The lower inner ring of the thrust bearing (206) is pressed against the outer ring of the transmission main shaft (213) through the bearing retainer (207).

6. The high-efficiency build-up screw drill with anti-drop function according to claim 1, characterized in that, A sealing ring (211) is provided between the inner ring of the upper end of the anti-drop nut (212) and the transmission main shaft (213).

7. The high-efficiency build-up screw drill with anti-drop function according to any one of claims 1-6, characterized in that, The motor assembly (1) includes a stator sleeve (11) that is vertically arranged and whose lower end is fixed to the drive shaft housing (202). Inside the stator sleeve (15) that can rotate planetarily is provided. The lower end of the rotor sleeve (15) is connected to the upper end of the drive shaft (213) through a universal connector (201). It also includes an anti-drop ring (13) disposed inside the rotor sleeve (15) and an anti-drop shaft (14) disposed vertically through the anti-drop ring (13). The lower end of the anti-drop shaft (14) is fixed to the rotor sleeve (15), and the outer diameter of the upper end is larger than the inner diameter of the anti-drop ring (13).

8. The high-efficiency build-up screw drill with anti-drop function according to claim 7, characterized in that, The rotor sleeve (15) is also provided with a locking bushing (12) that can abut against the anti-drop ring (13).