CN101672170A - A new electric directional coring device - Google Patents

Abstract

The invention relates to a novel electric directional coring device, which is a tool specially designed for directional coring of geological exploration rock cores. The electric directional coring device consists of a mechanical bin and a battery bin, wherein the mechanical bin mainly consists of a torque balance and constant pressure guide part, a micro-drill rotary drilling part, a pressure balance part and a marking and drilling control part. The design device has the advantages of compact structure, simple operation and high reliability, and in addition, the cost of the device is lower than that of other existing directional marking devices or methods, and the application range is wide (the caliber is not less than 60mm), so that the device is more favorable for popularization and use in directional core drilling.

Description

A new electric directional coring device

technical field

This electric directional coring device is a geological instrument used in geological exploration, oil drilling and underground measurement.

technical background

Directional coring is accomplished by drilling and coring using high-precision multi-point inclinometers and specially designed core directional coring tools. When drilling and coring, use an electric directional coring tool to mark the end face of the core that has not changed its original position at the bottom of the hole. At present, there are many coring devices at home and abroad, but most of them are complex in structure, difficult to assemble and disassemble, and are limited by geological conditions such as drilling hole depth, hole diameter, rock core breakage and cross-sectional shape, which limit the promotion of directional coring technology. For this purpose, a new type of electric directional coring device was designed and developed.

Contents of the invention

This design includes a mechanical compartment and a battery compartment. The mechanical compartment is designed with several parts including rotary drilling, constant pressure directional drilling, pressure balance, and marking drilling control device. Its functions are realized in this way.

1. Design the mechanical compartment and battery compartment

The electric directional coring device is designed with a battery compartment and a mechanical compartment. The specific plan is as follows: Since the directional coring device is limited by the radial size of the rope core tube, the mechanical compartment and the battery compartment are designed separately, and the battery compartment is connected by threads. And the pluggable electrode and the sealing ring realize the power supply and sealing of the mechanical chamber, and ensure the continuous working ability of the directional corer in the hole.

2. Design the mechanical rotary drilling part

The electric directional corer is designed with a mechanical rotary drilling part. The specific plan is as follows: Due to the drilling process and stratum requirements, a miniature diamond drill bit is developed to reduce the power consumption of the directional corer. According to the requirement of drilling eccentricity, the power device of micro motor + reducer is selected, and the connection between the motor, the drill bit and the shaft is realized through the cross slider coupling. When working, the motor drives the coupling and the shaft to drive the drill bit to rotate, realizing rotary drilling .

3. Design the constant pressure directional drilling part

This electric directional corer is designed with a constant pressure oriented drilling part, the specific plan is as follows: install a spring above the motor, adjust the pre-compression force of the spring through the electrode seat, and realize the drilling pressure required by the drill bit during the drilling process. How the weight of the measurement system changes while drilling in the hole can achieve constant pressure marking drilling. At the same time, in order to ensure reliable guided rotary drilling, a guide column that can move up and down with the motor is designed. One end is threaded to the bottom of the motor, and the other end is inserted into the guide groove of the support nut. At the same time, a diversion structure is added to realize the constant pressure guided rotary drill. Enter.

4. Design pressure balance part

The electric directional coring device is designed with a pressure balance part. The specific scheme is as follows: As the hole depth increases, the pressure in the hole increases. For the balance device, due to the limitation of the internal size of the mechanical chamber, a pressure balance sleeve is installed in the support nut. The pressure balance sleeve opens in the drilling fluid and is isolated and sealed from the internal balance fluid. It is fixed on the balance nut. The balance nut and the support nut Threaded connection and additional sealing ring are used to squeeze out a part of the air from the pressure balance sleeve during installation, which can minimize the impact caused by the failure of the mechanical chamber to be completely filled with mechanical oil. The pressure balance part is designed to solve the problem of orientation The structural sealing and pressure balance problems of the corer in the deep hole ensure the reliability of the drilling spindle rotation seal during the drilling process.

5. Design marking and drilling control device

This electric directional coring device is designed with a marking drilling control device. The specific scheme is as follows: use a screw plus a spring as a switch controller. In the initial state, the screw is not connected to the conductive copper ring. , the micro-drill, the shaft, and the motor move up together, the screw contacts the conductive copper ring, the entire circuit is connected, and the motor drives the drill to work. When the predetermined hole depth is reached, the screw and the conductive copper ring are separated again, and the entire circuit is disconnected, thereby realizing the drilling. Automatically turn on the power supply when touching the bottom of the hole to drill holes, and automatically turn off the power supply after the marking hole is completed, realizing automatic control of the start and end of marking drilling, and ensuring the endurance of the directional corer in the hole.

The advantages of this electric directional corer:

1. Bring your own rechargeable power supply, which saves the trouble of disassembling and assembling the battery.

2. Design and develop micro-diamond drill bits to reduce the cutting power consumption of the directional corer.

3. The design of the constant pressure steering rotary drilling system avoids the influence of the external environment on the work of the device, and at the same time ensures the balance of reliable steering drilling and counter torque.

4. Through the design of the pressure balance device, the influence of the underground high pressure on the seal of the mechanical chamber is greatly reduced, and the reliability of the seal is improved.

5. The design uses the marking and drilling control device to realize the automatic control of the working state of the motor, with a compact structure, simple and practical.

6. The whole device is integrated on the support nut, which has strong integrity and is convenient for maintenance and disassembly.

Description of drawings

The concrete structure of this design has following embodiment and accompanying drawing to provide.

Fig. 1 is the front view of this design device.

Fig. 2 is a partial view of the rotary drilling in Fig. 1 .

Fig. 3 is a partial view of constant pressure drilling in Fig. 1 .

Fig. 4 is a partial view of the pilot drilling in Fig. 1 .

Fig. 5 is a schematic diagram of the guide channel of the guide column in Fig. 4 .

Fig. 6 is a partial view of pressure balance in Fig. 1 .

Fig. 7 is a partial view of the marking drilling control in Fig. 1 .

Detailed ways

This design consists of the following components:

Battery compartment 1, Mechanical compartment 2, Motor 3, Pin shaft 4, Coupling 5, Shaft 6, Drill bit 7, Sleeve 8, Electrode seat 9, Spring 10, Guide column 11, Support nut 12, Pressure balance sleeve 13, Balance nut 14, electrode connecting column 15, conductive copper ring 16, slotted round head screw 17, switch spring 18, electrode holder 19, backflow channel 20.

When the diamond micro-drill (7) in the directional marking device did not touch the end face of the rock core, the screw (17) as a switch control did not contact the conductive copper ring (16), the whole circuit was disconnected, and the motor (3) did not work; when the micro-drill (7) is in contact with the end face of the rock core, the micro-drill (7), the shaft (6), and the motor (3) move up together, and the screw (17) is driven by the electrode holder (9) through the switch spring (18) Press it back in the guide groove of the motor base (19), so that the screw (17) is always in contact with the conductive copper ring (16), the circuit is connected, the spring (10) applies the drilling pressure to the micro drill bit (7), and the motor (3 ) drives the micro-drill (7) to rotate through the coupling (5), and the drilling begins. With the increase of the drilling depth, the motor (3), the shaft (6), and the micro-drill (7) move down together until the screw ( 17) Separate from the conductive copper ring (16) again, the circuit is disconnected, the motor (3) stops rotating, at this time, the drilling is completed, the directional marking is successful, and marking is realized.

Claims (5)

1, a kind of novel electric directional coring apparatus, battery compartment (1) two large divisions who comprises engine chamber (2) and mounted thereto, it is characterized in that battery compartment is by being threaded and insertable type electrode (15) and sealing ring are realized sealing and power supply to engine chamber, guarantee the continuation of the journey ability to work of engine chamber in the hole, realize the boring mark.

2, corer according to claim 1, it is characterized in that in order to reduce the directional coring apparatus power consumption in when work, satisfy drilling technique and stratum requirement, the diamond bit (7) that development and design low-power consumption soldering is miniature, this drill bit (7) adopts with axle (6) and is threaded, be convenient to dismounting, axle (6) links to each other with motor (3) axle by shaft coupling (5), realizes rotary drilling.

3, corer according to claim 1 is characterized in that motor top mounting spring (10), by adjusting electrode tip holder (9) spring (10) is applied precompression, creeps into to realize constant voltage; Simultaneously in order to guarantee that guiding is crept into reliably, designed two leads (11) that link to each other with motor and can move up and down with motor, the other end inserts in the gathering sill of holding nut (12), increases flow-guiding structure simultaneously, realizes that guiding creeps into also balance reaction torque.

4, corer according to claim 1, it is characterized in that reliability for main shaft in the drilling process (6) rotatory sealing, designed pressure balance cover (13), to guarantee that hole depth increases, drilling liquid pressure increases, the balance of instrument external and internal pressure, this pressure balance cover (13) be opened in the drilling fluid and with the equilibrium liquid isolating seal of inside, its peristome is fixed on the balance nut (14), balance nut (14) adopts with holding nut (12) and is threaded, and the additional encryption seal, realize pressure balance.

5, corer according to claim 1, it is characterized in that in order to guarantee the continuation of the journey ability to work in the hole, designed mark boring control device, by using screw (17) to add upper spring (18) as on-off controller, screw during original state (17) is not connected with conductive copper (16), when micro drill (7) contacts with hole bed rock core, micro drill (7), axle (6), motor (3) moves on together, screw (17) is connected with conductive copper (16), entire circuit is communicated with, force screw (17) compression switch spring (18) and withdrawal, beginning mark boring, when extending to the setting hole depth along with mark boring, screw (17) separates once more with conductive copper (16), and mark boring finishes.

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