CN108331924B - Low-remanence underground pulse generator control valve - Google Patents

Low-remanence underground pulse generator control valve Download PDF

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Publication number
CN108331924B
CN108331924B CN201711449034.9A CN201711449034A CN108331924B CN 108331924 B CN108331924 B CN 108331924B CN 201711449034 A CN201711449034 A CN 201711449034A CN 108331924 B CN108331924 B CN 108331924B
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push rod
plug
control valve
valve port
valve
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CN108331924A (en
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代春生
刘敏
吴磊
谢小军
莫志锋
杜军伟
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Guangdong Puluo Measurement And Control Technology Co ltd
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Guangdong Puluo Measurement And Control Technology Co ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/14Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with ball-shaped valve member
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32Details
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B34/00Valve arrangements for boreholes or wells
    • E21B34/06Valve arrangements for boreholes or wells in wells
    • E21B34/08Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00Survey of boreholes or wells
    • E21B47/12Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
    • E21B47/14Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves
    • E21B47/18Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves through the well fluid, e.g. mud pressure pulse telemetry
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32Details
    • F16K1/48Attaching valve members to screw-spindles
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00Construction of housing; Use of materials therefor
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00Construction of housing; Use of materials therefor
    • F16K27/02Construction of housing; Use of materials therefor of lift valves
    • F16K27/0209Check valves or pivoted valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00Actuating devices; Operating means; Releasing devices
    • F16K31/02Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00Actuating devices; Operating means; Releasing devices
    • F16K31/02Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0675Electromagnet aspects, e.g. electric supply therefor

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geophysics (AREA)
  • Remote Sensing (AREA)
  • Acoustics & Sound (AREA)
  • Electromagnetism (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

The application is a divisional application of 'a low residual magnetism downhole pulse generator control valve' on 2016, 28.3.78 in China, application number 201610181338.0, and relates to a low residual magnetism downhole pulse generator control valve, which is characterized in that a return spring is arranged between a push rod and a plug, when an electromagnetic driving device drives the push rod to push the plug to block a valve port, the spring is compressed, at the moment, the spring force is smaller than the thrust exerted on the push rod by the electromagnetic driving device and is larger than the thrust of slurry pressure on the plug, one end of the return spring pushes the plug to abut against the slurry pressure at the valve port, the other end of the return spring exerts reverse thrust on the push rod, when the control signal current of the electromagnetic driving device is removed to open the valve port, although the push rod still has partial thrust due to residual magnetism on the spring, the residual magnetism thrust is greatly smaller than the reverse force of the spring, the return rod can be quickly returned to get rid of the residual magnetism thrust, and then the plug and the push rod are completely reset under the pushing of the mud pressure, so that the control valve can effectively perform high-frequency response.

Description

Low-remanence underground pulse generator control valve
The application is a divisional application of 'a low remanence downhole pulse generator control valve' on 2016, 28.3.78, application number 201610181338.0 in China.
Technical Field
The invention relates to the technical field of petroleum exploration and drilling, in particular to a low-remanence underground pulse generator control valve.
Background
In the process of oil exploration and drilling, drilling equipment is an indispensable tool. The core of the drilling equipment is the drill bit, so that the drilling condition of the drill bit needs to be monitored at any time. However, as drilling progresses, the drill bit penetrates into the stratum, and it is difficult for a worker at the surface to directly observe the condition of the drill bit, so that various monitoring devices such as a direction sensor and a temperature sensor need to be arranged at the drill bit, and detected data is transmitted to the surface through a communication link and is received and analyzed by the worker at the surface.
Because the downhole environment is so harsh, it is difficult for the detection device to communicate with the ground through a general communication line, and also difficult to communicate with the ground through a conventional wireless method. At present, the ground and underground communication mode is generally realized by adopting a pulse generator to control a slurry conveying pipeline, the principle is that the pulse generator is arranged in a slurry flow channel, the pulse generator is opened/closed according to a certain rule (the closing is not completed in practical application, the aperture of the flow channel is usually reduced), so that the slurry flow channel generates regular pulses, and ground workers detect and decode the pulses on the ground to obtain detection data.
Specifically, the pulse generator generally includes a main valve and a control valve, a slide valve and a flow-limiting valve disposed outside the slide valve are disposed in the main valve, the tail end of the main valve is connected to the control valve, a portion of the slurry flows to the control valve through an inner cavity of the slide valve and flows out through a drain hole of the control valve, and the other portion of the slurry flows through a gap between the slide valve and the flow-limiting valve. Therefore, as long as the control valve is used for switching on and off the valve port of the control valve in order according to the signal of the detection device, the whole slurry channel can generate a regular pulse.
In practice, however, it is always difficult for the mechanical waves generated by the pulse generator to exactly coincide with the electromagnetic waves generated by the detection means, especially at high frequencies. The applicant has found through research that one of the important causes is the problem of remanence of the control valve. In the control valve, an electromagnetic driving device (usually a coil) is usually required, the electromagnetic driving device generates a magnetic field when the valve port needs to be plugged according to an electric signal sent by a detection device, so that a push rod in the control valve is pushed, the plug is pushed by the push rod to plug the valve port, the magnetic field is cancelled when the plugging of the valve port needs to be released, and slurry pressure outside the valve port can push the plug and the push rod to reset. In practice, however, after the electrical signal of the electromagnetic driving device is removed, residual magnetism still remains in the magnetic conductive substance, and the magnetic field is difficult to disappear completely and quickly, so that a certain thrust force still exists on the push rod, and the thrust force can counteract the pressure of the mud at the initial stage of offsetting part of the pressure of the mud in the reset process of the push rod, thereby resulting in slow reset. On the other hand, when the reset is slow, it is difficult to quickly perform a high-frequency response.
Disclosure of Invention
The present invention has been made to avoid the above-mentioned disadvantages of the prior art, and an object of the present invention is to provide a control valve which can reduce the residual magnetism of an electromagnetic driving device, thereby enabling the control valve to effectively perform a high frequency response.
The invention idea is as follows: the inventor finds that in the current control valve, the armature of the electromagnetic driving device is abutted against the control valve shell, the movable armature is abutted against the control valve shell through the magnetic conductive seat, the armature, the control valve shell, the magnetic conductive seat and the movable armature form a closed loop, the electromagnetic driving device generates a magnetic field to be transmitted in the closed loop, namely, the magnetic path needs to pass through the control valve shell, and the hardness performance is generally preferred when the control valve is selected from the shell, so that the surface of the control valve can resist the erosion of slurry without being damaged. However, in nature, materials with good hardness properties generally have poor magnetic permeability, and therefore, the shell also becomes the key of residual magnetism of the electromagnetic driving device. However, the current methods for reducing remanence by those skilled in the art are generally based on coils, flux guides, etc. in electromagnetic drives, and are not fully aware of the key to the generation of remanence by the housing.
The purpose of the invention is realized by the following technical scheme:
the electromagnetic driving device drives the push rod to move towards the valve port according to a received control signal so that the push rod drives the plug to plug the valve port, the electromagnetic driving device comprises an electromagnetic coil, a magnetic conductive seat and a movable armature arranged in the magnetic conductive seat, the electromagnetic coil generates a driving magnetic field according to an electric control signal, the driving magnetic field is transmitted to the magnetic conductive seat through a shell of the control valve so as to drive the movable armature to move towards the valve port, the movable armature is connected with the push rod, the maximum magnetic permeability mu m of the shell of the control valve is more than or equal to 0.012H/m, and the magnetic induction intensity B300 is more than or equal to 1.1T when the magnetic field intensity is 300A/m.
Wherein, the control valve shell is sprayed with a hard alloy layer.
Wherein the hardness of the hard alloy layer is 1200HV0.3 or more.
Wherein, the bonding strength between the hard coating and the control valve shell is more than or equal to 120 Mpa.
Wherein the thickness of the hard coating is less than or equal to 0.2 mm.
The valve comprises a valve body, a valve plug and a push rod, wherein the valve body is provided with a valve port plug, the valve port plug is connected with the valve port plug, the push rod is connected with the valve port plug through a plug, one end of the push rod is connected with the push rod, the other end of the push rod is connected with the plug, the push rod enables the push rod to deform, the plug is further driven to plug the valve port, and when the plug blocks the valve port, acting force of the.
The plug is provided with an inner cavity, and one end of the push rod facing the valve port is inserted into the inner cavity.
The plug is characterized in that a groove is formed in the inner cavity wall or the outer side wall of the plug, a limiting pin shaft is arranged at the front end of the push rod and inserted into the groove, and the width of the groove is larger than that of the limiting pin shaft along the reciprocating motion direction of the push rod, so that the limiting pin shaft can reciprocate in the groove when the push rod reciprocates.
The end, far away from the valve port, of the plug is provided with a first step, the push rod is provided with a second step, one end of the return spring is fixed to the first step, and the other end of the return spring is fixed to the second step.
The beneficial effects created by the invention are as follows: the invention is created when choosing the control valve outer casing, the magnetic permeability of the material is preferably considered, especially, the maximum magnetic permeability mu m of the outer casing is required to be more than or equal to 0.012H/m, the magnetic induction B300 is required to be more than or equal to 1.1T when the magnetic field intensity is 300A/m, because the magnetic permeability is bigger, therefore, the electromagnetic driving device can make the battery armature obtain enough magnetic field force only by passing smaller current, on one hand, the energy consumption of the battery driving device is reduced, and the magnetic field intensity generated by the battery driving device is smaller, therefore, the magnetic field intensity transmitted to the control valve outer casing is smaller, and the residual magnetism can be greatly reduced.
Drawings
The invention is further described with the aid of the accompanying drawings, in which, however, the embodiments do not constitute any limitation to the invention, and for a person skilled in the art, without inventive effort, further drawings may be derived from the following figures.
FIG. 1 is a schematic structural diagram of a downhole pulser control valve with low remanence according to the present invention.
In fig. 1, included are:
1-valve port, 2-discharge hole, 3-plug, 31-cavity, 32-groove, 33-first step, 4-push rod, 41-limit pin shaft, 42-second step, 5-return spring, 6-electromagnetic coil, 7-shell, 8-magnetic seat and 9-movable armature.
Detailed Description
The invention will be further described with reference to the following examples.
The invention creates a specific implementation mode of a low-remanence downhole pulse generator control valve, as shown in figure 1, comprising: the valve comprises a valve port 1, a drain hole 2, a plug 3, a push rod 4 and an electromagnetic driving device, wherein the valve port 1 is communicated with the drain hole 2, and the electromagnetic driving device drives and controls the push rod 4 and the plug 3 to move towards the valve port according to a received control signal.
The plug 3 is provided with an inner cavity 31, one end of the push rod 4 facing the valve port 1 is inserted into the inner cavity 31, the push rod 4 drives the plug 3 to plug the valve port 1, a groove 32 is formed in the cavity wall of the inner cavity 31 of the plug 3, a limit pin 41 is arranged at the front end of the push rod 4, the limit pin 41 is inserted into the groove 32, and the width of the groove 32 is larger than that of the limit pin 41 along the reciprocating motion direction of the push rod 4, so that the limit pin 41 can reciprocate in the groove 32 when the push rod 4 reciprocates.
The valve further comprises a return spring 5, a first step 33 is arranged at one end, away from the valve port 1, of the plug 3, a second step 42 is arranged on the push rod 4, one end of the return spring 5 is fixed on the first step 33, and the other end of the return spring is fixed on the second step 42.
When the electromagnetic driving device drives the push rod 4 to move towards the valve port 1, the push rod 4 pushes the return spring 5, and further pushes the plug 3 to move towards the valve port 1, and when the plug 3 props against the valve port 1, the push force acting on the push rod 4 is larger than the pressure of slurry on the plug 3, and the limit pin shaft 41 can reciprocate in the groove 32, so that the push rod 4 can continue to move forwards at the moment, and the return spring 5 is compressed; when the current of the electromagnetic driving device is removed, the thrust of the electromagnetic driving device to the push rod 4 can be rapidly reduced, and at the moment, although a certain thrust exists on the push rod 4 due to residual magnetism, the thrust is inevitably greatly smaller than the thrust of the return spring 5 to the push rod 4, the push rod 4 can be rapidly retracted until the limit pin 41 contacts the inner wall of the groove 32, and because the residual magnetism is removed, the plug 3 and the push rod 4 can be rapidly and completely reset continuously under the pushing of the mud pressure.
Compared with the prior art, the technology does not depend on the pressure of slurry on the plug 3 to enable the push rod 4 to reset, moreover, the electromagnetic driving device drives the push rod 4 and the plug 3 by the thrust which is greatly larger than the pressure of the slurry, so that the valve port 1 is quickly plugged, the acting force of a spring on the push rod 4 is also larger than the pressure of the slurry when the valve port 1 is plugged, the influence of residual magnetism can be greatly reduced, the valve port 1 is quickly unplugged, the time required by the action period of plugging and unplugging of the control valve is greatly shortened, and the response speed is effectively improved, so that the control valve can respond to high-frequency signals more effectively.
In the embodiment, the electromagnetic driving device comprises an electromagnetic coil 6, a magnetic conductive seat 8 and a movable armature 9 arranged in the magnetic conductive seat 8, the electromagnetic coil 6 generates a driving magnetic field according to an electric control signal, the driving magnetic field is transmitted to the magnetic conductive seat 8 through a shell 7 of the control valve so as to drive the movable armature 9 to move towards the valve port 1, the movable armature 9 is connected with the push rod 4, the coercive force Hc of the shell 7 of the control valve is less than or equal to 35A/m, the maximum magnetic permeability mum is greater than or equal to 0.012H/m, and the magnetic induction intensity B300 is greater than or equal to 1.1T when the magnetic field intensity is 300A/m. Since the control valve housing 7 belongs to an important magnetic conductive device in the electromagnetic driving device, the performance of the control valve housing 7 can seriously affect the condition of residual magnetism, thereby affecting the response speed of the control valve. However, at present, when considering the material of the housing 7 of the solenoid valve, only the hardness requirement is generally considered, but the magnetic permeability is not considered, and since the influence of the residual magnetism on the response capability of the control valve is recognized, the material meeting the above-mentioned index is preferably used as the material of the housing 7 of the control valve. On the other hand, because the magnetic permeability is relatively high, the battery armature can obtain enough magnetic field force only by passing relatively small current through the electromagnetic driving device, so that the energy consumption of the battery driving device is reduced, after all, in the field of underground detection, underground electricity utilization is very difficult, the power consumption is reduced, the system stability can be effectively improved, the magnetic field intensity generated by the battery driving device is relatively small, the magnetic field intensity transmitted to the control valve shell is relatively small, and the residual magnetism can be greatly reduced.
In particular, the control valve housing 7 is sprayed with a hard alloy layer. The hardness of the hard alloy layer is 1200HV0.3 or more. The bonding strength of the hard coating and the control valve shell 7 is more than or equal to 120 Mpa. The thickness of the hard coating is less than or equal to 0.2 mm. When a material having a high magnetic permeability is selected for the casing 7, it is inevitable that the hardness of the casing 7 of the control valve is lowered, which results in that the outer surface of the control valve is easily damaged by erosion of slurry, and therefore, the hard alloy layer is sprayed on the outer surface of the casing 7 of the control valve, thereby ensuring that the surface of the control valve can withstand erosion of slurry without being damaged.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims (9)

1. A low-remanence underground pulse generator control valve comprises a valve port, a drainage hole, a plug, a push rod and an electromagnetic driving device, wherein the valve port is communicated with the drainage hole, the electromagnetic driving device drives the push rod to move towards the valve port according to a received control signal so that the push rod drives the plug to plug the valve port, the electromagnetic driving device comprises an electromagnetic coil, a magnetic conductive seat and a movable armature arranged in the magnetic conductive seat, the electromagnetic coil generates a driving magnetic field according to an electric control signal, the driving magnetic field is transmitted to the magnetic conductive seat through a shell of the control valve so as to drive the movable armature to move towards the valve port, and the movable armature is connected with the push rod: the maximum magnetic permeability mum of the control valve shell is more than or equal to 0.012H/m, and the magnetic induction B300 is more than or equal to 1.1T when the magnetic field intensity is 300A/m.
2. A low remanence downhole pulser control valve of claim 1, wherein: and a hard alloy layer is sprayed on the control valve shell.
3. A low remanence downhole pulser control valve according to claim 2, wherein: the hardness of the hard alloy layer is 1200HV0.3 or more.
4. A low remanence downhole pulser control valve according to claim 2, wherein: the bonding strength of the hard coating and the control valve shell is more than or equal to 120 Mpa.
5. A low remanence downhole pulser control valve according to claim 2, wherein: the thickness of the hard coating is less than or equal to 0.2 mm.
6. A low remanence downhole pulser control valve of claim 1, wherein: the valve is characterized by further comprising a return spring, one end of the return spring is connected with the push rod, the other end of the return spring is connected with the plug, the push rod enables the return spring to deform so as to drive the plug to plug the valve port, and when the plug blocks the valve port, the acting force of the return spring on the push rod and the plug is larger than the pressure of fluid media on the valve port plug.
7. A low remanence downhole pulser control valve of claim 1, wherein: the plug is provided with an inner cavity, and one end of the push rod facing the valve port is inserted into the inner cavity.
8. A low remanence downhole pulser control valve of claim 1, wherein: the plug is characterized in that a groove is formed in the wall of the inner cavity or the outer side wall of the plug, a limiting pin shaft is arranged at the front end of the push rod and inserted into the groove, and the width of the groove is larger than that of the limiting pin shaft along the reciprocating motion direction of the push rod, so that the limiting pin shaft can reciprocate in the groove when the push rod reciprocates.
9. A low remanence downhole pulser control valve according to claim 6, wherein: one end of the plug, which is far away from the valve port, is provided with a first step, the push rod is provided with a second step, one end of the return spring is fixed on the first step, and the other end of the return spring is fixed on the second step.
CN201711449034.9A 2016-03-28 2016-03-28 Low-remanence underground pulse generator control valve Active CN108331924B (en)

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CN201711449034.9A CN108331924B (en) 2016-03-28 2016-03-28 Low-remanence underground pulse generator control valve
CN201610181338.0A CN105757260B (en) 2016-03-28 2016-03-28 A kind of downhole pulser control valve of low remanent magnetism

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CN105626940B (en) * 2016-03-28 2018-04-20 广东普洛测控科技有限公司 A kind of downhole pulser control valve

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