CN204436303U - A kind of coring bit drive unit - Google Patents

Abstract

The utility model provides a coring drill driving device, which includes a coring drill, a DC motor and a flexible shaft, wherein a gear mechanism is also included, and the DC motor transmits power to the gear mechanism through the flexible shaft. The gear mechanism drives the core bit to rotate. The above-mentioned coring bit driving device is used in the technical field of petroleum exploration. The gear mechanism of the above-mentioned coring bit driving device cooperates with the flexible shaft to ensure stable and continuous transmission and improve the efficiency and success rate of coring.

Description

A kind of coring drill driving device

technical field

The utility model relates to the technical field of petroleum exploration, in particular to a driving device for a coring drill bit.

Background technique

In the process of oil logging, it is necessary to use the sidewall coring tool to drill the core, and the key part of the core tool is the drill bit. At present, conventional wellbore coring instruments use a hydraulic pump to drive a hydraulic motor to drive a diamond drill bit to drill cores for coring operations. The hydraulic motor has the technical defect that its overall efficiency is not high, and the success rate of coring is not high. Since the commonly used hydraulic motors need to withstand a lot of system pressure, frequent leakage occurs in high temperature and high pressure environments, which is one of the important reasons for coring failure. many problems.

Utility model content

The purpose of the utility model is to provide a high-efficiency coring drill driving device with a high success rate of coring.

In order to achieve the purpose of the above invention, the utility model provides a coring drill driving device, including a coring drill, a DC motor and a flexible shaft, wherein it also includes a gear mechanism, and the DC motor transmits power through the flexible shaft To the gear mechanism, the gear mechanism drives the core bit to rotate.

Further, the gear mechanism includes a large arc gear, a small arc gear and a transmission shaft, the large arc gear is meshed with the small arc gear, the small arc gear is connected with the flexible shaft, and the large arc gear fits On the transmission shaft and fixed, the end of the transmission shaft is fixed with the core bit.

Further, the gear mechanism further includes a gear box, the gear box houses the large arc gear and the small arc gear, and is connected to the transmission shaft at positions close to both ends of the transmission shaft through bearings.

Further, the transmission shaft runs through the gear box.

Compared with the prior art, the utility model has the following beneficial effects:

The driving device of the coring drill described in the utility model adopts a DC motor, which has higher working efficiency than the hydraulic motor, and avoids the failure of coring due to leakage of the hydraulic motor.

The coring bit driving device described in the utility model adopts flexible shaft transmission, which has high transmission efficiency, high coring efficiency and relatively high coring success rate.

The driving device of the coring bit described in the utility model adopts a large-arc gear and a small-arc gear, and cooperates with a flexible shaft to ensure continuous and stable transmission when the coring direction changes.

The driving device for the coring drill described in the utility model has a compact structure, is firm and reliable, and is convenient for installation and disassembly.

Description of drawings

Fig. 1 is the structural representation of the utility model coring bit driving device;

Fig. 2 is A-A sectional view of Fig. 1;

Fig. 3 is a B-B sectional view of Fig. 1 .

Reference signs: 1-flexible shaft, 2-gear mechanism, 3-coring drill bit, 4-large arc gear, 5-small arc gear, 6-transmission shaft, 7-bearing, 8-gear box, 9-gear box Sealing ring, 10-flexible shaft sleeve.

Detailed ways

In order to make the purpose of the invention, technical solutions and beneficial effects of the utility model clearer, the embodiments of the utility model will be described below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments and The features in the embodiments can be combined with each other arbitrarily.

Embodiment Referring to FIG. 1 , FIG. 1 is a schematic structural view of a coring drill driving device. As shown in Figure 1, the coring bit driving device includes a coring bit 3, a DC motor and a flexible shaft 1, and is characterized in that it also includes a gear mechanism 2, and one end of the flexible shaft 1 is connected to the output end of the DC motor, The other end is connected to the input end of the gear mechanism 2 , and the output end of the gear mechanism 2 is fixedly connected to the core bit 3 .

2 and 3 are cross-sectional views of FIG. 1 , respectively. As shown in Figure 2 and Figure 3, the gear mechanism 2 includes a large arc gear 4, a small arc gear 5, a transmission shaft 6 and a gearbox 8, the flexible shaft 1 is connected with the small arc gear 5, the small arc gear 5 and the large arc gear 4 Placed vertically and meshed with each other, the transmission shaft 6 runs through the center of the large arc gear 4 and is fixed with the large arc gear 4 , and the gear box 8 covers the large arc gear 4 and the small arc gear 5 . The gearbox 8 is penetrated by the transmission shaft 6 and is fixed axially by two bearings 7 and the transmission shaft. The gap between the upper and lower end surfaces of the gear case 8 penetrated by the transmission shaft 6 and the transmission shaft 6 is sealed by a gear sealing ring 9 . In addition, the core bit driving device also includes a flexible shaft sleeve 10 covering the flexible shaft 1 for protecting the flexible shaft 1 .

When the coring bit driving device is working, the DC motor drives the flexible shaft 1 to rotate, and the flexible shaft 1 transmits the motion to the small arc gear 5, so that the small arc gear 5 rotates, thereby driving the large arc gear meshed with the small arc gear 5 4. The large arc gear 4 rotates, and the core bit 3 is rotated through the transmission shaft 6 to start the coring work. Two large and small arc gears ensure continuous and smooth transmission when the core bit rotates axially and reduce the rotational speed generated by the DC motor and increase the torque.

This design adopts a DC motor, which is compact in structure, easy to install and disassemble, and adopts flexible shaft transmission, which has high transmission efficiency, high coring efficiency and relatively high success rate of coring. Two large and small arc gears also ensure continuous and stable transmission.

Although the embodiments disclosed in the present utility model are as above, the content thereof is only for the convenience of understanding the technical solutions of the present utility model, and is not intended to limit the present utility model. Anyone skilled in the technical field to which the utility model belongs can make any modifications and changes in the form and details of the implementation without departing from the core technical solution disclosed in the utility model, but the protection limited by the utility model The scope must still be subject to the scope defined by the appended claims.

Claims (4)

1. a coring bit drive unit, comprises coring bit, direct current generator and flexible axle, it is characterized in that, also comprise gear mechanism,

Described direct current generator is by described flexible axle by power transmission extremely described gear mechanism, and described gear mechanism drives described coring bit to rotate.

2. coring bit drive unit as claimed in claim 1, it is characterized in that, described gear mechanism comprises large gear with curved teeth, little gear with curved teeth and power transmission shaft,

Described large gear with curved teeth is engaged with described little gear with curved teeth, and described little gear with curved teeth is connected with described flexible axle, and described large gear with curved teeth is set on described power transmission shaft, and fixing, and described end part of driving shaft and described coring bit are fixed.

3. coring bit drive unit as claimed in claim 2, it is characterized in that, described gear mechanism also comprises gear-box, and described gearbox cover fills described large gear with curved teeth and little gear with curved teeth, and is connected being formed with described power transmission shaft near described power transmission shaft end positions by bearing.

4. coring bit drive unit as claimed in claim 3, it is characterized in that, described power transmission shaft runs through described gear-box.