CN113202424B - Rotary guide hydraulic power module - Google Patents

Abstract

The present invention discloses a rotary directional hydraulic power module, including a shell, a working base plate is arranged at the bottom of the back of the shell, a low-pressure ring cavity is opened inside the shell, a wiring terminal inserted into the low-pressure ring cavity is arranged on one side of the bottom of the shell, and a high-pressure conversion connector, a high-efficiency motor, a plunger oil pump and a filter connected in sequence are arranged on the side close to the wiring terminal inside the low-pressure ring cavity, a throttle valve and a safety valve are arranged on the side of the filter away from the plunger oil pump, piston cylinders are arranged on both sides of the top of the working base plate, and a working surface is arranged on the top of the piston cylinder. Beneficial effect: By adopting a new miniaturized design and adding a structure with a reverse buffering function to the system, the reverse force when the drill bit impacts the rock and the drill collar impacts the well wall is avoided. Rapid backflow on the plunger oil pump is avoided, thereby protecting important components of the high-pressure system, ensuring long-term and reliable operation of the system, reducing maintenance costs and extending the tool use time.

Description

A rotary steering hydraulic power module

Technical Field

The invention relates to the field of downhole operation equipment in oil and gas fields, and in particular to a rotary steering hydraulic power module.

Background technique

With the development of oil drilling technology, the drilling process has been upgraded from vertical wells to ultra-deep wells and large-displacement horizontal wells. The trajectory of the drill bit below the ground changes from a straight line to a curve or even a three-dimensional curve in an orthogonal system. This requires the direction and angle of the drill bit to change. The rotary steering hydraulic power module provides power support for the drill bit to change direction; the existing system has a single structure, high energy consumption, uneven force, fast component wear, high maintenance frequency, and frequent drilling, resulting in high construction period and construction cost.

Currently, no effective solution has been proposed for the problems in the related technologies.

Summary of the invention

In view of the problems in the related art, the present invention proposes a rotary steerable hydraulic power module to overcome the above technical problems existing in the existing related art.

To this end, the specific technical solution adopted by the present invention is as follows:

A rotary guide hydraulic power module comprises a shell, a working base plate is arranged at the bottom of the back side of the shell, a low-pressure ring cavity is opened inside the shell, a wiring terminal inserted into the low-pressure ring cavity is arranged on one side of the bottom of the shell, a high-pressure conversion connector, a high-efficiency motor, a plunger oil pump and a filter connected in sequence are arranged on the side close to the wiring terminal inside the low-pressure ring cavity, a throttle valve and a safety valve are arranged on the side of the filter away from the plunger oil pump, piston cylinders are arranged on both sides of the top of the working base plate, and a working surface is arranged on the top of the piston cylinder.

Furthermore, in order to be able to power the high-efficiency motor through the high-voltage conversion connector and transmit different instructions to change the current size and thus change the speed of the high-efficiency motor, the wiring terminal maintains electrical connection with the high-efficiency motor through the high-voltage conversion connector.

Furthermore, in order to make the working surface fit the well wall better and make the structure of the module more reasonable, an obtuse angle structure is formed between the working base plate and the shell, and the working surface and the working base plate are kept parallel.

Furthermore, in order to enable the plunger oil pump to apply pressure to the piston cylinder through the filter and the high-pressure outlet, and to block and release pressure through the one-way buffer valve when the piston cylinder returns pressure, so as to avoid the pressure from reacting to the plunger oil pump, thereby realizing the protection of the pressure system, a high-pressure outlet is opened at the bottom of the low-pressure ring cavity below the safety valve, and the piston cylinder and the high-pressure outlet are kept connected and a one-way buffer valve is provided, with the direction from the high-pressure outlet to the piston cylinder.

Furthermore, in order to prevent violent shaking when the working surface continuously hits the well wall, thereby allowing the drilling work to run smoothly, a universal joint mechanism is used to maintain the connection between the piston cylinder and the working surface.

Furthermore, in order to improve the filtering accuracy, the filter achieves a 5μm level filtering accuracy.

Furthermore, in order to achieve the purposes of throttling and safety respectively, the throttle valve is used to limit the flow to ensure the stability of the pressure, and the safety valve is used to ensure that it can be opened quickly to release the pressure when the system pressure reaches the design threshold to avoid damage to internal components. The filter is connected to the throttle valve and the safety valve respectively.

Furthermore, in order to ensure that the throttle valve and the safety valve are connected to the low-pressure ring cavity, and then connected to the piston cylinder through the high-pressure outlet, thereby completing the pressure transmission, the side of the throttle valve and the safety valve away from the filter are connected to the low-pressure ring cavity through the low-pressure reflux port.

The beneficial effects of the present invention are:

1. By adopting a new miniaturized design and adding a structure with reverse buffering function to the system, the reverse force when the drill bit hits the rock and the drill collar hits the well wall can be avoided from quickly flowing back to the plunger pump, thereby protecting the important components of the high-pressure system, ensuring the long-term reliable operation of the system, reducing maintenance costs and extending the tool use time.

2. The design of double piston cylinder and universal joint is more in line with the principle of dynamics, the structure is simplified and there is a slight fluctuation range when impacted by the well wall, avoiding mechanical interference, thus ensuring the equipment moves without jamming.

3. The present invention has the advantages of easy manufacturing, convenient processing, simplified structure, improved production efficiency, simple and efficient maintenance and low cost.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

FIG1 is a front structural schematic diagram of a rotary steerable hydraulic power module according to an embodiment of the present invention;

FIG2 is a side view of a rotary steerable hydraulic power module according to an embodiment of the present invention;

FIG3 is a schematic diagram of a rotary steerable hydraulic power module according to an embodiment of the present invention;

FIG4 is a schematic diagram of a hydraulic system of a rotary steerable hydraulic power module according to an embodiment of the present invention;

FIG. 5 is an application diagram of a rotary steerable hydraulic power module in a drill collar system according to an embodiment of the present invention.

In the figure:

1. Shell; 2. Working base plate; 3. Low-pressure ring cavity; 4. Wiring terminal; 5. High-pressure conversion connector; 6. High-efficiency motor; 7. Plunger oil pump; 8. Filter; 9. Throttle valve; 10. Safety valve; 11. Piston cylinder; 12. Working surface; 13. High-pressure outlet; 14. Low-pressure reflux port.

Detailed ways

To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

According to an embodiment of the present invention, a rotary steerable hydraulic power module is provided.

The present invention is now further described in conjunction with the accompanying drawings and specific embodiments. As shown in Figures 1-5, a rotary steering hydraulic power module according to an embodiment of the present invention includes a shell 1, a working base plate 2 is arranged at the bottom of the back side of the shell 1, a low-pressure ring cavity 3 is opened inside the shell 1, and a wiring terminal 4 inserted into the low-pressure ring cavity 3 is arranged on one side of the bottom of the shell 1. The low-pressure ring cavity 3 is provided with a high-pressure conversion connector 5, a high-efficiency motor 6, a plunger oil pump 7 and a filter 8 connected in sequence on the side close to the wiring terminal 4. A throttle valve 9 and a safety valve 10 are arranged on the side of the filter 8 away from the plunger oil pump 7. Piston cylinders 11 are arranged on both sides of the top of the working base plate 2, and a working surface 12 is arranged on the top of the piston cylinder 11.

With the aid of the above technical solution, by adopting a new miniaturized design and adding a structure with a reverse buffering function to the system, the reverse force when the drill bit impacts the rock and the drill collar impacts the well wall is avoided from quickly flowing back to the plunger oil pump 7, thereby protecting the important components of the high-pressure system, ensuring the long-term reliable operation of the system, reducing maintenance costs and extending the tool use time. The design of the double-piston cylinder 11 and the universal joint is more in line with the principle of dynamics, the structure is simplified, and there is a slight fluctuation range when impacted by the well wall, avoiding mechanical interference, thereby ensuring that the equipment moves without jamming. The present invention has the advantages of easy manufacturing, convenient processing, simplified structure, improved production efficiency, simple and efficient maintenance and low cost.

In one embodiment, for the above-mentioned terminal 4, the terminal 4 is electrically connected to the high-efficiency motor 6 through the high-voltage conversion connector 5, so that the high-efficiency motor 6 can be powered by the high-voltage conversion connector 5, and different instructions can be transmitted to change the current size, thereby changing the speed of the high-efficiency motor 6.

In one embodiment, for the above-mentioned working substrate 2, an obtuse angle structure is formed between the working substrate 2 and the shell 1, and the working surface 12 remains parallel to the working substrate 2, so that the working surface 12 fits the well wall better, making the structure of the module more reasonable.

In one embodiment, for the above-mentioned low-pressure ring chamber 3, a high-pressure outlet 13 is provided at the bottom of the low-pressure ring chamber 3 below the safety valve 10, and the piston cylinder 11 is connected to the high-pressure outlet 13 and is provided with a one-way buffer valve, with the direction from the high-pressure outlet to the piston cylinder, so that the plunger oil pump 7 can apply pressure to the piston cylinder 11 through the filter 8 and the high-pressure outlet 13, and when the piston cylinder 11 returns pressure, the one-way buffer valve is used to block and release pressure to prevent the pressure from reacting to the plunger oil pump 7, thereby protecting the pressure system.

In one embodiment, for the piston cylinder 11, a universal joint mechanism is used to maintain connection between the piston cylinder 11 and the working surface 12, so that when the working surface 12 continuously hits the well wall, there will be no violent shaking, so that the drilling work can run smoothly.

In one embodiment, for the above filter 8, the filter 8 achieves a filtration accuracy of 5 μm, thereby improving the filtration accuracy.

In one embodiment, for the above-mentioned filter 8, the filter 8 is connected with the throttle valve 9 and the safety valve 10 respectively, so as to achieve the purposes of throttling and safety respectively. The pressure stability is ensured by the flow limiting of the throttle valve 9, and at the same time, the safety valve 10 is ensured to open quickly to release the pressure when the system pressure reaches the design threshold, so as to avoid damage to internal components.

In one embodiment, for the above-mentioned throttle valve 9, the side of the throttle valve 9 and the safety valve 10 away from the filter 8 are connected to the low-pressure annular cavity 3 through the low-pressure reflux port 14, so that the throttle valve 9 and the safety valve 10 are connected to the low-pressure annular cavity 3, and then connected to the piston cylinder 11 through the high-pressure outlet 13, thereby completing the pressure transmission.

In order to facilitate understanding of the above technical solutions of the present invention, the working principle or operation mode of the present invention in the actual process is described in detail below.

In actual application, three hydraulic power modules are grouped together and are evenly arranged at the position of the drill collar near the drill bit. The three modules work independently and cooperate with each other to complete the function of changing direction. At the same time, when in use, the three modules supply currents of different sizes according to the usage.

In actual operation, the drill collar and the drill bit are controlled to enter the well, and the three working surfaces 12 reach the well wall, so that the position of the drill collar is located. The wiring terminal 4 supplies power to the high-voltage conversion connector 5 and the high-efficiency motor 6. After obtaining the wellhead instruction, the high-efficiency motor 6 changes the speed according to the size of the power-on current, and provides different speeds for the plunger oil pump 7 connected thereto, thereby changing the displacement of the plunger oil pump 7. The plunger oil pump 7 transfers the high-pressure oil to the inside of the low-pressure ring cavity 3 through the filter 8 and the throttle valve 9, and then transfers it to the piston cylinder 11 through the high-pressure outlet 13 and the one-way buffer valve, thereby pressurizing the piston cylinder 11. When the system is depressurized, the high-efficiency motor 6 does not work, the system pressure decreases, and the high-pressure oil in the piston cylinder 11 is buffered in one direction by the buffer valve. Since the reverse buffering is blocked, the resistance of the high-pressure oil can be reduced, avoiding the rapid reverse action on the internal components of the system, thereby protecting important components. At the same time, since the working surface 12 is frequently impacted, the pressure is transmitted back, and the reaction force is also buffered and reduced pressure through the above-mentioned buffer valve to protect the components. In addition, when the three working surfaces 12 work simultaneously, the stability of the drill collar can be greatly improved, the drill bit can be avoided from bouncing, and the forward trajectory of the drill bit can be ensured to be free of bouncing and creeping until the drilling work is completed.

In summary, with the aid of the above technical solution of the present invention, by adopting a new miniaturized design and adding a structure with a reverse buffering function to the system, the reverse force when the drill bit impacts the rock and the drill collar impacts the well wall is avoided from quickly flowing back to the plunger oil pump 7, thereby protecting the important components of the high-pressure system, ensuring the long-term reliable operation of the system, reducing maintenance costs and extending the tool use time. The design of the double-piston cylinder 11 and the universal joint is more in line with the principle of dynamics, the structure is simplified, and there is a slight fluctuation range when impacted by the well wall, avoiding mechanical interference, thereby ensuring that the equipment moves without jamming. The present invention has the advantages of easy manufacturing, convenient processing, simplified structure, improved production efficiency, simple and efficient maintenance and low cost.

In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (5)

1. The utility model provides a rotation guide hydraulic power module, its characterized in that, including casing (1), casing (1) back bottom is provided with work base plate (2), low-pressure ring cavity (3) have been seted up to casing (1) inside, casing (1) bottom one side is provided with alternates to inside binding post (4) of low-pressure ring cavity (3), low-pressure ring cavity (3) are inside by being close to one side of binding post (4) is provided with high-pressure conversion connector (5), high-efficient motor (6), plunger oil pump (7) and filter (8) that connect gradually, one side that filter (8) kept away from plunger oil pump (7) is provided with choke valve (9) and relief valve (10), work base plate (2) top both sides all are provided with piston cylinder (11), piston cylinder (11) top is provided with working face (12);

a high-pressure outlet (13) is formed in the inner bottom of the low-pressure ring cavity (3) below the safety valve (10);

the piston cylinder (11) is connected with the high-pressure outlet (13) and is provided with a one-way buffer valve, and when the piston cylinder (11) returns to pressure, the one-way buffer valve is used for blocking and relieving pressure;

the piston cylinder (11) is connected with the working surface (12) by adopting a universal joint mechanism;

the filter (8) is in communication with the throttle valve (9) and the safety valve (10), respectively.

2. A rotary steerable hydraulic power module according to claim 1, characterized in that the connection terminal (4) is electrically connected to the high-efficiency motor (6) by means of a high-voltage conversion connector (5).

3. A rotary steerable hydraulic power module according to claim 1, characterized in that the working base plate (2) and the housing (1) are in an obtuse angle configuration, the working surface (12) being parallel to the working base plate (2).

4. A rotary steerable hydraulic power module according to claim 1, characterized in that the filter (8) achieves a 5 μm level of filtering accuracy.

5. A rotary steerable hydraulic power module according to claim 4, characterized in that the throttle valve (9) and the side of the safety valve (10) remote from the filter (8) are both in communication with the low pressure ring chamber (3) via a low pressure return port (14).