CN212716437U

CN212716437U - Piston mechanism of guide drilling thrust device

Info

Publication number: CN212716437U
Application number: CN202021229312.7U
Authority: CN
Inventors: 梁涛; 赵东瑞
Original assignee: Beijing Bwg Petroleum Technology Co ltd
Current assignee: Beijing Bwg Petroleum Technology Co ltd
Priority date: 2020-06-29
Filing date: 2020-06-29
Publication date: 2021-03-16
Anticipated expiration: 2030-06-29

Abstract

The utility model discloses a piston mechanism of a guiding well drilling thrust device, wherein a mounting groove is arranged on a shell, a piston mounting plate is fixedly connected in the mounting groove, a piston is pressed in the piston mounting plate, the bottom walls of the piston, the mounting plate and the mounting groove form an oil cylinder, the top of the piston is fixedly connected with a piston head, and the upper part of the piston is sleeved with a piston rubber sleeve; the outer side wall of the shell is a cambered surface, an oil tank mechanism communicated with the oil cylinder and a driving mechanism for driving the piston to move are further arranged in the shell, the driving mechanism and the oil tank mechanism are arranged in parallel, and a vertical connecting line of central axes of the driving mechanism and the oil tank mechanism forms 123 degrees with the end face of the piston. The outer side wall of the shell is a cambered surface, a vertical connecting line of the central axes of the driving mechanism and the oil tank mechanism and the end face of the piston form 123 degrees, and the piston mechanisms of the three same independently controlled guiding drilling thrust devices can be tightly combined into a complete cylinder shape, so that the piston mechanisms of the three guiding drilling thrust devices can be uniformly distributed in the circumferential direction while the piston moves along the diameter direction.

Description

Piston mechanism of guide drilling thrust device

Technical Field

The utility model relates to an oil and gas exploration equipment technical field, in particular to piston mechanism of direction well drilling thrust device.

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 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 piston mechanism suitable for use in the above-described drive thrust unit.

SUMMERY OF THE UTILITY MODEL

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

The utility model adopts the following technical scheme:

a piston mechanism of a guiding well drilling thrust device comprises a shell, a piston mounting plate, a piston head and a piston rubber sleeve, wherein the shell is provided with a mounting groove, the piston mounting plate is fixedly connected in the mounting groove, the piston is pressed in the piston mounting plate, the bottom walls of the piston, the mounting plate and the mounting groove form an oil cylinder, the piston head is fixedly connected to the top of the piston, and the piston rubber sleeve is sleeved on the upper part of the piston; the outer side wall of the shell is an arc surface, and the tangent of the arc surface is perpendicular to the central axis of the piston; an oil tank mechanism communicated with the oil cylinder and a driving mechanism for driving the piston to move are further arranged in the shell, and the driving mechanism and the oil tank mechanism are arranged in parallel.

Furthermore, a vertical connecting line of central axes of the driving mechanism and the oil tank mechanism forms an angle of 123 degrees with the end face of the piston.

Furthermore, the outer side wall of the piston is provided with two annular grooves, and a lower movable sealing ring and an upper movable sealing ring are respectively arranged in the annular grooves.

Furthermore, the piston head is T-shaped, and an O-shaped ring is pressed on the contact surface of the piston and the piston head.

The utility model has the advantages as follows:

1. the utility model discloses a casing lateral wall is the cambered surface, and the perpendicular connecting wire of actuating mechanism and oil tank mechanism axis becomes 123 with the piston end face, and the piston mechanism of three independent control's direction drilling thrust device can closely combine into complete cylindricly, when consequently can guaranteeing the piston along the motion of diametral direction, guarantees the piston mechanism of three direction drilling thrust device at the circumference equipartition, the utility model discloses rational in infrastructure and compact, compressive capacity is strong, and the during operation has good stability.

2. The utility model discloses a piston lateral wall is equipped with two annular grooves, is equipped with the lower part in the annular groove respectively and moves sealing ring and upper portion and move the sealing ring, moves the sealing ring during piston motion and can improve the seal.

Drawings

FIG. 1 is a schematic view of the three-dimensional structure of the present invention

FIG. 2 is a cross-sectional view of the axial vertical end of FIG. 1;

FIG. 3 is a cross-sectional view of the cross-section of FIG. 1;

fig. 4 is an enlarged schematic view of the structure at a in fig. 3.

Shown in the figure: 1-piston head, 2-piston rubber sleeve, 3-piston mounting plate, 4-shell, 5-piston, 6-driving mechanism, 7-oil tank mechanism, 8-lower movable sealing ring, 9-upper movable sealing ring, 10-oil cylinder, 11-O-shaped ring and 12-vertical connecting line.

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 to 3.

A piston mechanism of a guiding well drilling thrust device comprises a shell 4, a piston mounting plate 3, a piston 5, a piston head 1 and a piston rubber sleeve 2, wherein a mounting groove is formed in the shell 4, the piston mounting plate 3 is fixedly connected in the mounting groove, the piston 5 is pressed in the piston mounting plate 3, the piston 5, the piston mounting plate 3 and the bottom wall of the mounting groove form an oil cylinder 10, the piston head 1 is fixedly connected to the top of the piston 3, and the piston rubber sleeve 2 is sleeved on the upper portion of the piston 3; the lateral wall of casing 4 is the arc surface, and the tangent line of arc surface is perpendicular with the axis of piston 5, still is equipped with the actuating mechanism 6 of oil tank mechanism 7 and the drive piston 3 motion that communicates with hydro-cylinder 10 in the casing 4, and actuating mechanism 6 and oil tank mechanism 7 parallel arrangement, the perpendicular connecting wire 12 of actuating mechanism 6 and oil tank mechanism 7 axis becomes 123 with 5 terminal surfaces of piston.

The outer side wall of the piston 3 is provided with two annular grooves, and a lower movable sealing ring 8 and an upper movable sealing ring 9 are respectively arranged in the annular grooves. The piston head 1 is T-shaped, and an O-shaped ring 11 is pressed on the contact surface of the piston 5 and the piston head 1.

The working process of the utility model is as follows:

the driving mechanism 6 is started, and the low-pressure oil in the oil tank mechanism 7 enters the oil cylinder 10 through a part of high-pressure oil generated after being pressurized by the driving mechanism 6 to push the piston 5 to move. By adjusting the motor speed in the drive mechanism 6, the pressure of the high pressure oil and thus the thrust of the piston 5 can be varied.

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

1. The piston mechanism of the guide drilling thrust device is characterized by comprising a shell, a piston mounting plate, a piston head and a piston rubber sleeve, wherein the shell is provided with a mounting groove; the outer side wall of the shell is an arc surface, and the tangent of the arc surface is perpendicular to the central axis of the piston; an oil tank mechanism communicated with the oil cylinder and a driving mechanism for driving the piston to move are further arranged in the shell, and the driving mechanism and the oil tank mechanism are arranged in parallel.

2. The piston mechanism of a steerable drilling thrust device of claim 1, wherein the vertical connection line of the central axes of the drive mechanism and the reservoir mechanism is at an angle of 123 ° to the piston face.

3. The piston mechanism of the steerable drilling thrust device according to claim 1, wherein the outer side wall of the piston is provided with two annular grooves, and a lower dynamic seal ring and an upper dynamic seal ring are respectively arranged in the annular grooves.

4. The piston mechanism of a steerable drilling thrust device of claim 1, wherein the piston head is T-shaped, and an O-ring is crimped to the piston head contact surface.