CN212959328U - Driving mechanism of guide drilling thrust device - Google Patents

Abstract

The utility model discloses a drive mechanism of a guiding well drilling thrust device, which comprises a synchronous motor, an oil tank and a drive oil cylinder, wherein an output shaft of the synchronous motor is connected with a pump, an inlet of the pump is connected with the oil tank, an outlet of the pump is connected with a pump head through a connecting piece, an inner cavity of the pump head is provided with a filter screen, the outlet of the pump head is connected with a throttle valve and an overflow valve, the pump head is provided with a high-pressure pore passage, and the pump head and the drive oil cylinder; the outlet of the throttle valve and the outlet of the overflow valve are provided with low-pressure pore channels, and the outlet of the throttle valve is communicated with the oil tank through the low-pressure pore channels. The utility model discloses simple structure collects machine, electricity, liquid in an organic whole, and is small, and thrust is big, and the action is nimble, through adjusting motor rotational speed, can change actuating mechanism oil pressure, and then changes drive power. And a shape ring and a retainer ring structure are arranged between the outer side wall of the micro pump outlet and the connecting piece and between the connecting piece and the inner side wall of the pump head, so that the whole sealing performance of the driving mechanism can be improved.

Description

Driving mechanism of guide drilling thrust device

Technical Field

The utility model relates to an oil and gas exploration equipment technical field, in particular to guiding drilling thrust device's actuating mechanism.

Background

Along with the continuous deepening of oil and gas exploration, complex ultra-deep directional wells and large-displacement horizontal wells are increasing. In the drilling construction of a large-displacement horizontal well, along with the lengthening of a horizontal section, the supporting pressure and the abrasion resistance of a downhole drilling tool are larger and larger, the track control difficulty is large, the mechanical drilling speed is slow, and the conventional drilling technology cannot meet the construction requirement easily.

In order to solve the above problems, the applicant conducted extensive manual work and developed a pilot drilling apparatus capable of controlling a string of vertical drilling apparatuses to drill along a prescribed trajectory.

The steerable drilling apparatus includes three independently controlled lateral thrusters, each thrust piston of which exerts a controllable thrust on the rib. Therefore, when the three wing ribs are unfolded and pushed against the well wall, three component forces are generated in different three directions, and finally the three component forces are gathered into a resultant force acting on the well wall and form an acting angle with the well wall. Conversely, after the well track is set, the magnitude and the direction (angle) of the pushing force of the upper wing rib of the guiding instrument acting on the well wall can be adjusted through software control, so that the drilling tool drills along the specified track, and the drilling track is accurately controlled.

The prior art lacks a drive mechanism suitable for driving the thrust device piston in motion as described above.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a guiding drilling thrust device's actuating mechanism to solve at least one of the problem that exists among the foretell prior art.

The utility model adopts the following technical scheme:

a driving mechanism of a guide drilling thrust device comprises a motor, an oil tank and a driving oil cylinder, wherein an output shaft of the motor is connected with a pump, an inlet of the pump is connected with the oil tank, an outlet of the pump is connected with a pump head through a connecting piece, a filter screen is arranged in an inner cavity of the pump head, an outlet of the pump head is connected with a throttle valve and an overflow valve, a high-pressure pore passage is formed in the pump head, and the pump head is communicated with the driving oil cylinder; the outlet of the throttle valve and the outlet of the overflow valve are provided with low-pressure pore channels, and the outlet of the throttle valve is communicated with the oil tank through the low-pressure pore channels.

Further, the motor is a synchronous motor.

Furthermore, the outlet outer side wall of the micro pump is provided with a first groove, a first check ring and a first shape ring are arranged in the first groove, and the first check ring and the first shape ring are pressed between the outlet outer side wall of the micro pump and the inner side wall of the connecting piece.

Furthermore, be equipped with the second recess on the lateral wall of connecting piece, be equipped with second retaining ring and second shape circle in the second recess, second retaining ring and the crimping of second shape circle are between connecting piece lateral wall and pump head inside wall.

The utility model has the advantages as follows:

1. the utility model discloses a motor drives the micropump operation, and during the low pressure oil in the oil tank passed through the import entering pump of micropump, the high pressure oil that the micropump operation produced got into the filter screen through the export of micropump and filters, and the high pressure oil after the filtration was through high-pressure pore, and partly entering hydro-cylinder promoted external piston motion, and unnecessary part flows back to the oil tank through low pressure pore through the choke valve. Once the oil pressure exceeds the rated pressure of the thrust device, high-pressure oil overflows through the overflow valve, so that the oil pressure is lower than the rated pressure, and the overflowing oil flows back to the oil tank through the low-pressure pore passage. The utility model discloses simple structure collects machine, electricity, liquid in an organic whole, and is small, and thrust is big, and the action is nimble, through adjusting motor rotational speed, can change actuating mechanism oil pressure, and then changes drive power.

2. The utility model discloses a be equipped with tangible circle and retaining ring structure between miniature pump export lateral wall and the connecting piece, between connecting piece and the pump head inside wall, can improve actuating mechanism's whole seal.

Drawings

Fig. 1 is a schematic perspective view of the present invention;

fig. 2 is an axial vertical end sectional view of the present invention.

Shown in the figure: 1-synchronous motor, 2-micropump, 3-oil tank, 4-pump head, 5-filter screen, 6-overflow valve, 7-throttle valve, 8-connecting piece, 9-second groove, 10-first groove, 11-piston mechanism and 12-shell.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

The technical solution of the present invention is further explained with reference to fig. 1.

A driving mechanism of a guide drilling thrust device comprises a shell 12, a synchronous motor 1 arranged in the shell 12, an oil tank 3 and a driving oil cylinder arranged in a piston mechanism 11, wherein an output shaft of the synchronous motor 1 is connected with a micro pump 2, an inlet of the micro pump 2 is connected with the oil tank 3, an outlet of the micro pump 2 is connected with a pump head 4 through a connecting piece 8, a filter screen 5 is arranged in an inner cavity of the pump head 4, a throttle valve 6 and an overflow valve 7 are connected to an outlet of the pump head 4, a high-pressure hole channel is arranged on the pump head 4, and the pump head 4 and the driving oil; the outlet of the throttle valve 7 and the outlet of the overflow valve 6 are provided with low-pressure pore canals, and the outlet of the throttle valve 7 is communicated with the oil tank 3 through the low-pressure pore canals.

The outer side wall of the outlet of the micro pump 2 is provided with a first groove 10, a first retaining ring and a first shape ring are arranged in the first groove 10, and the first retaining ring and the first shape ring are pressed between the outer side wall of the outlet of the micro pump 2 and the inner side wall of the connecting piece 8.

Be equipped with second recess 9 on the lateral wall of connecting piece 8, be equipped with second retaining ring and second shape circle in the second recess 9, second retaining ring and the crimping of second shape circle are between 8 lateral walls of connecting piece and 4 inside walls of pump head.

The working process of the utility model is as follows:

the synchronous motor 1 is powered, the synchronous motor 1 drives the micro pump 2 to operate, low-pressure oil in the oil tank 3 enters the micro pump 2 through an inlet of the micro pump 2, high-pressure oil generated by operation of the micro pump 2 enters the filter screen 5 through an outlet of the micro pump 2 to be filtered, part of the filtered high-pressure oil enters the driving oil cylinder through a high-pressure hole channel, the driving oil cylinder is connected with an external piston to drive the piston to move, and the rest part of the filtered high-pressure oil flows back to the oil tank 3 through a low-pressure hole channel through the throttle valve 7. Once the oil pressure exceeds the rated pressure of the thrust device detected by external equipment, high-pressure oil overflows through the overflow valve 6, so that the oil pressure is lower than the rated pressure, and the overflowed oil flows back to the oil tank 3 through a low-pressure pore passage. By adjusting the speed of the synchronous motor 1, the oil pressure can be changed, and the thrust of the piston can be changed.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (4)

1. A driving mechanism of a guide drilling thrust device is characterized by comprising a shell, a motor, an oil tank and a driving oil cylinder, wherein the motor, the oil tank and the driving oil cylinder are arranged in the shell; the outlet of the throttle valve and the outlet of the overflow valve are provided with low-pressure pore channels, and the outlet of the throttle valve is communicated with the oil tank through the low-pressure pore channels.

2. The steering thrust unit drive mechanism of claim 1, wherein said motor is a synchronous motor.

3. The drive mechanism of a steerable drilling thrust device as recited in claim 1, wherein the outer side wall of the outlet of the micro-pump is provided with a first groove, and a first retainer ring and a first annular ring are arranged in the first groove, and the first retainer ring and the first annular ring are crimped between the outer side wall of the outlet of the micro-pump and the inner side wall of the connecting piece.

4. The driving mechanism of a steerable drilling thrust device as recited in claim 1, wherein the outer sidewall of the connecting member has a second groove, and a second retaining ring and a second shape ring are disposed in the second groove and are crimped between the outer sidewall of the connecting member and the inner sidewall of the pump head.

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