CN212536294U - Drilling cylinder pressure supply device with servo valve and pressure increasing valve - Google Patents
Drilling cylinder pressure supply device with servo valve and pressure increasing valve Download PDFInfo
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- CN212536294U CN212536294U CN202021069345.XU CN202021069345U CN212536294U CN 212536294 U CN212536294 U CN 212536294U CN 202021069345 U CN202021069345 U CN 202021069345U CN 212536294 U CN212536294 U CN 212536294U
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Abstract
The utility model discloses a take drilling cylinder of servo valve and pressure-increasing valve to supply pressure device, including the pressure-increasing cylinder valve body, pressure-increasing cylinder case, servo valve body and servo case, the pressure-increasing cylinder valve body is provided with the big pump oil inlet, is provided with balanced cavity and advances the oil cavity in the servo valve body, and the one end of the cavity that advances oil is provided with the drilling cylinder and advances oil pipe, is provided with balanced oil inlet on the servo valve body and creeps into the oil inlet, and the one end gradual change nature shrink of servo case, the one end of servo case shrink extend to the intercommunication department of creeling into oil inlet and advancing the oil. The utility model provides a take drilling cylinder of servo valve and booster valve to supply pressure device, when drilling cylinder and hydraulic motor meet harder rock, the pressure increase of big pump oil inlet department leads to creeping into the hydraulic oil flow reduction that the oil inlet got into in the oil inlet cavity for the pressure that gets into the hydraulic oil in the drilling cylinder reduces, reduces the driving speed that advances of drilling cylinder to hydraulic motor, is difficult for causing the sticking to bore.
Description
Technical Field
The utility model belongs to the oil logging technique, concretely relates to take drilling cylinder pressure supply device of servo valve and pressure-increasing valve.
Background
The well wall coring device is a well logging instrument for oil field, and mainly includes hydraulic motor, drilling cylinder, drill bit, drilling cylinder pressure-supplying device and motor pressure-supplying device, etc. The current side-wall coring device is easy to cause the drill jamming in the coring process, so that the coring success rate is low. The main reasons for sticking are: the hydraulic power provided by the drilling cylinder pressure supply device for the drilling cylinder is a stable value, when soft rock is drilled, the drilling speed is high, when hard rock is drilled, the drilling speed is slow, the drilling speed cannot be changed, and the hydraulic motor is blocked, so that the drill sticking is caused.
SUMMERY OF THE UTILITY MODEL
To the technical problem who exists among the above-mentioned prior art, the utility model aims at providing a take drilling cylinder pressure supply device of servo valve and pressure-increasing valve.
The purpose of the utility model is realized by the following technical scheme.
A drilling cylinder pressure supply with a servo valve and a pressure increasing valve, comprising:
the oil inlet of the large pump is communicated with the inner cavity of the pressure cylinder valve core;
the servo valve body is connected with the pressure cylinder valve body, a balance cavity and an oil inlet cavity are arranged in the servo valve body, a servo valve core is arranged in the balance cavity, an oil inlet pipe of the drilling cylinder is arranged at one end of the oil inlet cavity, the oil inlet cavity is communicated with the oil inlet pipe of the drilling cylinder, and the oil inlet pipe of the drilling cylinder extends to the outside of the servo valve body; the servo valve body is provided with a balance oil inlet and a drilling oil inlet, the balance oil inlet is communicated with the balance cavity, and the drilling oil inlet is communicated with the oil inlet cavity; one end of the servo valve core is gradually contracted, and the contracted end of the servo valve core extends to the communication position of the drilling oil inlet and the oil inlet cavity;
and the valve core of the pressure cylinder is fixedly connected with the servo valve core.
The servo valve core is of a stepped shaft structure, the outer diameter of one end, facing the oil inlet cavity, of the servo valve core is matched with the inner diameter of the oil inlet cavity, the end part of the end of the servo valve core extends to the communication position of the drilling oil inlet and the oil inlet cavity, and the end part of the end shrinks gradually.
The maximum cross-sectional area of the valve core of the booster cylinder is larger than that of the servo valve core.
The end part of the valve core of the pressure cylinder is provided with a valve body protective cap, and the oil inlet of the large pump is arranged on the valve body protective cap.
A seal sleeve is arranged in the balance cavity, and one end of the seal sleeve is tightly attached to the end part of the oil inlet cavity; and one end of the servo valve core, which contracts, penetrates through the sealing sleeve and extends to the communication position of the drilling oil inlet and the oil inlet cavity.
An oil pipe pressing cap is arranged at the end of the servo valve body, and the oil inlet pipe of the drilling cylinder penetrates through the oil pipe pressing cap and extends to the outside of the servo valve body.
The utility model has the advantages that: the utility model provides a take drilling cylinder of servo valve and booster valve to supply pressure device, when drilling cylinder and hydraulic motor meet harder rock, the pressure increase of big pump oil inlet department leads to creeping into the hydraulic oil flow reduction that the oil inlet got into in the oil inlet cavity for the pressure that gets into the hydraulic oil in the drilling cylinder reduces, reduces the driving speed that advances of drilling cylinder to hydraulic motor, is difficult for causing the sticking to bore.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an enlarged schematic view of a region a in fig. 1.
In the figure, 10 is a pressure cylinder valve body, 11 is a pressure cylinder valve core, 12 is a large pump oil inlet, 13 is a valve body protective cap, 20 is a servo valve body, 21 is a servo valve core, 22 is a balance cavity, 23 is an oil inlet cavity, 24 is a drilling cylinder oil inlet pipe, 25 is a balance oil inlet, 26 is a drilling oil inlet, 27 is a sealing sleeve, and 28 is an oil pipe pressing cap.
Detailed Description
The technical solution of the present invention will be described and explained in detail with reference to fig. 1-2. In addition, the technical features of the present invention may be arbitrarily combined with each other without conflict.
Fig. 1 is the structural schematic diagram of the utility model, the booster cylinder valve body 10, booster cylinder case 11, servo valve body 20 and servo case 21 isotructure have been demonstrated in fig. 1, the enlarged structure that demonstrates servo valve body 20 and servo case 21 in fig. 2 is favorable to the better understanding of technical personnel the technical scheme of the utility model. It should be noted that fig. 1 and 2 are only for clearly explaining the technical solution of the present invention, and do not limit the technical solution of the present invention.
As shown in fig. 1 to 2, a pressure supply device for a drilling cylinder with a servo valve and a pressure increasing valve is mainly used for providing hydraulic power for the drilling cylinder, so that the drilling cylinder drives a hydraulic motor device to advance and retreat, and when the motor pressure supply device stops (a large pump oil stops) to provide rotary hydraulic power for the hydraulic motor, the pressure supply device for the drilling cylinder can also provide hydraulic power for the drilling cylinder, so that the drilling cylinder drives the hydraulic motor to advance, and further a drilled core is broken. It should be noted that the large pump oil of the present invention is oil used for providing hydraulic power to the hydraulic motor, the large pump hydraulic system is associated with the pressure supply device of the drilling cylinder, and the feedback force of the hydraulic motor can be fed back to the pressure supply device of the drilling cylinder through the large pump hydraulic system; the drilling oil is used for providing hydraulic power for driving the hydraulic motor to advance or retreat by the drilling cylinder; the balance oil refers to oil introduced for balancing a pressure relationship between large pump oil and small pump oil (oil drilled in), and the hydraulic pressure of the balance oil is kept constant.
Specifically, this creeps into jar and supplies pressure equipment and include pressure cylinder valve body 10, pressure cylinder case 11, servo valve body 20 and servo case 21, for current creeps into jar and supplies pressure equipment, the utility model discloses pressure cylinder valve body 10 and pressure cylinder case 11 have been introduced for the hydraulic pressure that the change creeps into the jar. The pressure cylinder valve body 10 and the servo valve body 20 are fixedly connected, preferably in threaded connection, and both the pressure cylinder valve body 10 and the servo valve body 20 are provided with inner cavities; the pressure cylinder valve core 11 is arranged in the inner cavity of the pressure cylinder valve body 10, one end of the pressure cylinder valve body 10 is provided with a large pump oil inlet 12, the large pump oil inlet 12 is communicated with the inner cavity of the pressure cylinder valve body 10, that is, when the large pump hydraulic oil is filled in the large pump oil inlet 12, the hydraulic pressure generated by the hydraulic oil pushes the pressure cylinder valve core 11 to move. In order to better understand the servo valve core 21, an inner cavity of the servo valve core 21 is divided into a balance cavity 22 and an oil inlet cavity 23, the balance cavity 22 is used for balancing the pressure cylinder valve core 11 and the servo valve core 21, and the oil inlet cavity 23 is used for communicating a drilling oil inlet 26 and a drilling cylinder oil inlet pipe 24 which are described below; the servo valve core 21 is arranged in the balance cavity 22, one end of the oil inlet cavity 23 is provided with an oil inlet pipe 24 of the drilling cylinder, the oil inlet pipe 24 of the drilling cylinder extends to the outside of the servo valve body 20, and the oil inlet pipe 24 of the drilling cylinder is communicated with the drilling cylinder and used for conveying drilling oil into the drilling cylinder to provide hydraulic power for the drilling cylinder. In order to introduce balance oil and drill oil, a balance oil inlet 25 and a drilling oil inlet 26 are arranged on the servo valve body 20, the balance oil inlet 25 is communicated with the balance cavity 22, the drilling oil inlet 26 is communicated with the oil inlet cavity 23, and the connection positions are shown in fig. 1 or fig. 2; in order to control the conveying amount of drilling oil, one end of the servo valve core 21 is set to be gradually contracted, and the contracted end of the servo valve core 21 extends to the communication position of the drilling oil inlet 26 and the oil inlet cavity 23. The gradual shrinkage is a linear shrinkage of a section of the servo spool 21 near the end, as shown in fig. 1 or 2 of the servo spool 21. In practical use, the angle of the inclined plane can be changed according to practical conditions, so that the flow of drilling oil is different, and the hydraulic oil drilling device is applied to drilling cylinders requiring different hydraulic pressures.
When the pressure of the large pump oil changes, the pressure difference generated by the large pump oil forces the pressure cylinder valve core 11 to shift, the pressure cylinder valve core 11 is fixedly connected with the servo valve core 21, the servo valve core 21 can follow the pressure cylinder valve core 11 to shift, the position of the contracted end of the servo valve core 21 at the communication position of the drilling oil inlet 26 and the oil inlet cavity 23 can also shift, so that the effective space of the communication between the drilling oil inlet 26 and the oil inlet cavity 23 is changed, when the servo valve core 21 shifts towards one end of the oil inlet cavity 23, the effective space of the communication between the drilling oil inlet 26 and the oil inlet cavity 23 can be reduced, the flow of the drilling oil can be reduced, and the speed of the drilling cylinder can be reduced; when the servo valve core 21 is displaced from one end of the oil inlet cavity 23, the effective space for communicating the drilling oil inlet 26 with the oil inlet cavity 23 is increased, the flow rate of the drilling oil is increased, and the speed of drilling the cylinder is increased. The effective space is the space surrounded by the drilling oil inlet 26, the oil inlet cavity 23 and the contraction section of the servo valve core 21 and through which drilling oil passes, and the space is determined by the displacement degree of the servo valve core 21.
Further, in order to ensure the structural stability of the servo valve spool 21, and in order to reduce the space occupied by the servo valve spool 21 as much as possible and provide a larger space for balancing oil, the servo valve spool 21 is configured as a stepped shaft structure, as shown in fig. 1 or 2, the servo valve spool 21 preferably has a three-stage stepped shaft structure, and the outer diameter of one end of the servo valve spool 21 facing the oil inlet cavity 23 is matched with the inner diameter of the oil inlet cavity 23, that is, the end of the servo valve spool 21 can slide in the oil inlet cavity 23 without oil leakage; the end of the servo spool 21 extends to the communication between the drilling oil inlet 26 and the oil inlet cavity 23, and gradually shrinks.
Further, in order to ensure that when the pressure of the large pump oil changes, the large pump oil can force the pressure cylinder valve core 11 and the servo valve core 21 to displace, the maximum cross-sectional area of the pressure cylinder valve core 11 is larger than that of the servo valve core 21, and the cross-sectional area refers to a cross-sectional area which is perpendicular to the axial direction of the pressure cylinder valve core 11 and the axial direction of the servo valve core 21.
Further, in order to ensure the sealing performance of the pressure cylinder valve core 11, a valve body protective cap 13 is arranged at the end part of the pressure cylinder valve core 11, and a large pump oil inlet is arranged on the valve body protective cap 13.
Further, in order to ensure the sealing performance between the balance cavity 22 and the oil inlet cavity 23, a sealing sleeve 27 is arranged in the balance cavity 22, and one end of the sealing sleeve 27 is tightly attached to the end part of the oil inlet cavity 23; the contracted end of the servo valve core 21 penetrates through the sealing sleeve 27 and extends to the communication position of the drilling oil inlet 26 and the oil inlet cavity 23. The sealing sleeve 27 here may take the form of a double sealing sleeve.
Further, in order to ensure the sealing performance of the servo spool 21 and the installation stability of the drilling cylinder inlet pipe 24, an oil pipe pressure cap 28 is provided at an end (end) of the servo valve body 20, the oil pipe pressure cap 28 is threadedly coupled to the servo valve body 20, and the drilling cylinder inlet pipe 24 penetrates the oil pipe pressure cap 28 and extends to the outside of the servo valve body 20. At this time, the end of the drilling cylinder inlet pipe 24 located inside may be provided with a step so that the oil pipe pressure cap 28 can block and press the drilling cylinder inlet pipe 24.
The utility model discloses a working method does: set up according to above-mentioned structural relation the utility model discloses the jar that creeps into with servo valve and pressure-increasing valve supplies pressure equipment to put, wherein, servo case 21 is three-section ladder shaft structure, and pressure-increasing cylinder case 11 is two-section ladder shaft structure, and big pump oil inlet 12 sets up on valve body helmet 13, and this jar that creeps into supplies pressure equipment to put as shown in fig. 1 ~ 2. The large pump oil inlet 12 is used for inputting large pump oil and is used for jacking the pressure cylinder valve core 11 and the servo valve core 21 so as to change the effective space of the drilling oil inlet 26 communicated with the oil inlet cavity 23; the drilling oil inlet 26 is used for drilling oil input and is used for providing hydraulic power for the drilling cylinder, and the hydraulic power is influenced by an effective space formed by the communication of the drilling oil inlet 26 and the oil inlet cavity 23; the balance oil inlet 25 is used for balance oil input, for large pump oil and drilling oil.
Specifically, when the pressure supply device for the drilling cylinder supplies hydraulic power to the drilling cylinder, the large pump oil also supplies hydraulic power to the hydraulic motor, and the pressure of the large pump oil at the oil inlet 12 of the large pump oil is the same as the hydraulic pressure fed back by the hydraulic motor. The large pump oil, the drilling oil and the balance oil are designed to be started as required, the hydraulic motor and the drilling cylinder work, the hydraulic motor is used for rotatably drilling rocks, and the drilling cylinder is used for driving the hydraulic motor to move forwards and backwards.
When the hydraulic motor drills softer rock, the operation of the hydraulic motor is not affected, and rock coring is still performed according to the design requirement; when the hydraulic motor drills harder rock, the feedback force borne by the hydraulic motor is increased, so that the pressure of hydraulic oil at the oil inlet 12 of the large pump is increased, the pressure of the hydraulic oil at the oil inlet 12 of the large pump is increased, the balance relation between original large pump oil and balance oil is broken by the increased pressure difference of the part, due to the increase of the pressure of the large pump oil, the valve core 11 of the booster cylinder and the servo valve core 21 move towards one side of the oil inlet cavity 23, the contracted end of the servo valve core 21 also moves towards one side of the oil inlet cavity 23, the space formed by the drilling oil inlet 26, the oil inlet cavity 23 and the inclined plane of the servo valve core 21 is reduced, the flow of the drilling oil is reduced, the hydraulic pressure of the drilling cylinder is reduced, the advancing speed of the hydraulic motor driven by the drilling cylinder is reduced, and therefore, the working load of the hydraulic motor is reduced, and.
After the hydraulic motor drills hard rocks, the rocks begin to become softer, the feedback force borne by the hydraulic motor is reduced, so that the pressure of hydraulic oil at the oil inlet 12 of the large pump is lower, the pressure of the hydraulic oil at the oil inlet 12 of the large pump is reduced, the balance relation between original large pump oil and balance oil is broken through by the reduced pressure difference of the part, due to the reduction of the pressure of the large pump oil, the valve core 11 of the booster cylinder and the servo valve core 21 move towards one side departing from the oil inlet cavity 23, the contracted end of the servo valve core 21 also moves towards one side departing from the oil inlet cavity 23, the space formed by the inclined surfaces of the drilling oil inlet 26, the oil inlet cavity 23 and the servo valve core 21 is enlarged, the flow of the drilling oil is enlarged, the hydraulic pressure of the drilling cylinder is enlarged, the advancing speed of the drilling cylinder driving the hydraulic motor is increased.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical solutions of the present invention, and it should be noted that, further improvements and changes can be made by those skilled in the art on the basis of the technical solutions of the present invention, and all such improvements and changes should be covered by the protection scope of the present invention.
Claims (6)
1. A take drilling cylinder pressure supply device of servo valve and booster valve which characterized in that includes:
the oil pump comprises a pressure cylinder valve body (10), wherein a pressure cylinder valve core (11) is arranged in the pressure cylinder valve body (10), a large pump oil inlet (12) is arranged at one end of the pressure cylinder valve body (10), and the large pump oil inlet (12) is communicated with an inner cavity of the pressure cylinder valve core (11);
the servo valve body (20) is connected with the pressure cylinder valve body (10), a balance cavity (22) and an oil inlet cavity (23) are arranged in the servo valve body (20), a servo valve core (21) is arranged in the balance cavity (22), one end of the oil inlet cavity (23) is provided with a drilling cylinder oil inlet pipe (24), the oil inlet cavity (23) is communicated with the drilling cylinder oil inlet pipe (24), and the drilling cylinder oil inlet pipe (24) extends to the outside of the servo valve body (20); the servo valve body (20) is provided with a balance oil inlet (25) and a drilling oil inlet (26), the balance oil inlet (25) is communicated with the balance cavity (22), and the drilling oil inlet (26) is communicated with the oil inlet cavity (23); one end of the servo valve core (21) is gradually contracted, and the contracted end of the servo valve core (21) extends to the communication position of the drilling oil inlet (26) and the oil inlet cavity (23);
and the pressure cylinder valve core (11) is fixedly connected with the servo valve core (21).
2. The pressure supply device for the drilling cylinder with the servo valve and the pressure increasing valve is characterized in that the servo valve core (21) is of a stepped shaft structure, the outer diameter of one end, facing the oil inlet cavity (23), of the servo valve core (21) is matched with the inner diameter of the oil inlet cavity (23), the end part of the end of the servo valve core (21) extends to the communication position of the drilling oil inlet (26) and the oil inlet cavity (23), and the end part of the end is gradually contracted.
3. Drilling cylinder pressure supply arrangement with servo valve and pressure build-up valve according to claim 1, characterised in that the maximum cross-sectional area of the pressure build-up cylinder spool (11) is larger than the maximum cross-sectional area of the servo spool (21).
4. The drilling cylinder pressure supply device with the servo valve and the booster valve as claimed in claim 1, characterized in that the end of the booster cylinder spool (11) is provided with a valve body cap (13), and the large pump oil inlet (12) is provided on the valve body cap (13).
5. The pressure supply device for the drilling cylinder with the servo valve and the pressure increasing valve is characterized in that a sealing sleeve (27) is arranged in the balance cavity (22), and one end of the sealing sleeve (27) is tightly attached to the end part of the oil inlet cavity (23); one contracted end of the servo valve core (21) penetrates through the sealing sleeve (27) and extends to the communication position of the drilling oil inlet (26) and the oil inlet cavity (23).
6. The drilling cylinder pressure supply device with the servo valve and the pressure increasing valve according to claim 1, characterized in that the end of the servo valve body (20) is provided with an oil pipe pressure cap (28), and the drilling cylinder oil inlet pipe (24) penetrates through the oil pipe pressure cap (28) and extends to the outside of the servo valve body (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021069345.XU CN212536294U (en) | 2020-06-11 | 2020-06-11 | Drilling cylinder pressure supply device with servo valve and pressure increasing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021069345.XU CN212536294U (en) | 2020-06-11 | 2020-06-11 | Drilling cylinder pressure supply device with servo valve and pressure increasing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212536294U true CN212536294U (en) | 2021-02-12 |
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ID=74639365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021069345.XU Active CN212536294U (en) | 2020-06-11 | 2020-06-11 | Drilling cylinder pressure supply device with servo valve and pressure increasing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212536294U (en) |
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2020
- 2020-06-11 CN CN202021069345.XU patent/CN212536294U/en active Active
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