Integrated gas regulator structure of set note gas regulation and static pressure measurement

Abstract

The application discloses a kind of integrated gas regulator structure of note gas regulation and measure static pressure, comprising: adjusting sleeve, inner flow passage is formed and is equipped with injection passage;Gas nozzle assembly, sleeve is connected in adjusting sleeve outer surface and is equipped with gas nozzle opening, adjusting sleeve is suitable for adjusting the coincidence of injection passage and gas nozzle opening and adjusting injection flow rate;Lower connector, with gas nozzle assembly connection, inner hole is formed, and side wall surface is equipped with pressure transmission hole;Protective sleeve, with the first sealing surface of cover being set in the gas nozzle opening and forming the sealed cavity outside hole away from hole, and the second sealing surface of cover being set in the pressure transmission hole outside hole away from hole, second sealing surface includes the first radial surface and the second radial surface located in the opposite sides of sealed cavity, first radial surface is located in the side of sealed cavity close to gas nozzle opening, and the second radial surface is greater than first radial surface to be able to drive protective sleeve to move so that second sealing surface is converted from sealing state to open state.The application can set up injection function structure and measure static pressure function structure.

Description

Technical Field

[0001] This invention relates to the field of downhole gas injection flow control and formation static pressure measurement technology in oilfield gas injection, and particularly to an integrated gas distributor structure that combines gas injection control and static pressure measurement. Background Technology

[0002] The integrated gas injection technology with simultaneous measurement and adjustment is a leading intelligent gas injection technology currently in use. It has been widely applied in mines due to its simple on-site installation, low investment cost, and convenient subsequent measurement and adjustment.

[0003] The integrated gas injection technology, which combines simultaneous measurement and adjustment, controls the injection volume by adjusting the nozzle opening. In related technologies, an anti-backflow shield is typically used to prevent formation backflow during injection shutdown. When gas injection stops and the pressure inside the tubing is lower than the external pressure, the anti-backflow shield closes, cutting off the connection between the nozzle and the outside, thus preventing formation backflow. When gas injection resumes normally and the pressure inside the tubing is higher than the external pressure, the anti-backflow shield opens, connecting the nozzle to the outside. However, the demand for formation static pressure monitoring in oilfield development is increasingly urgent. Due to the aforementioned structural characteristics, it is impossible to use the nozzle for formation static pressure testing. Therefore, a separate static pressure measurement channel is designed, leading to complex downhole operations. The nozzle and static pressure measurement channel must be operated separately, increasing structural complexity and manufacturing costs, while also increasing the risk of seal leakage and reducing process reliability. Therefore, there is a need to provide an integrated gas distributor structure that combines gas injection control and static pressure measurement to integrate the gas injection and static pressure measurement functions. Summary of the Invention

[0004] To address the aforementioned problems, the purpose of this invention is to provide an integrated gas distributor structure that combines gas injection control and static pressure measurement. Hydraulic pressure in the oil pipe is transmitted to the sealed cavity through a pressure transmission hole. Because the pressure-bearing area of ​​the second radial surface that bears the hydraulic pressure in the sealed cavity is greater than that of the first radial surface, the protective sleeve moves, thus changing from a sealed state (sealing the gas nozzle opening) to an open state (opening the gas nozzle opening). In this open state, the gas nozzle opening and the gas injection channel that overlaps and connects with it can be used to introduce external pressure, i.e., formation pressure, for pressure measurement, and can also be used for external gas injection, etc. In other words, this invention can integrate the gas injection function structure and the static pressure measurement function structure.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An integrated gas distributor structure combining gas injection regulation and static pressure measurement includes: an adjusting sleeve having an internal flow channel and a side wall having a gas injection channel communicating with the flow channel; a nozzle assembly fitted onto the outer circumferential surface of the adjusting sleeve and having a nozzle opening suitable for communicating with the gas injection channel, the adjusting sleeve being adapted to adjust the overlapping flow area of ​​the gas injection channel and the nozzle opening to regulate the gas injection flow rate; a lower connector connected to the nozzle assembly, having an internal channel communicating with the flow channel and a pressure transmission hole communicating with the channel on its side wall; and a protective sleeve covering the nozzle opening opposite to the channel. The sealing surface forms a first sealing surface that forms a sealing cavity, and a second sealing surface that covers the pressure transmission hole away from the outside of the channel. The second sealing surface includes a first radial surface and a second radial surface located on opposite sides of the sealing cavity. The first radial surface is located on the side of the sealing cavity closer to the air nozzle opening. The pressure-bearing area of ​​the second radial surface that bears the hydraulic pressure in the sealing cavity is greater than the pressure-bearing area of ​​the first radial surface, so that the protective sleeve can be driven to move by the hydraulic pressure in the sealing cavity, thereby changing the second sealing surface from a sealed state that seals the air nozzle opening to an open state that opens the air nozzle opening.

[0007] According to at least one embodiment of the present invention, the protective sleeve is connected to the lower connector via an elastic member, the elastic deformation direction of the elastic member is consistent with the moving direction of the protective sleeve, and the elastic member is configured to drive the protective sleeve to move in the opposite direction so that the second sealing surface retracts to the sealing state.

[0008] According to at least one embodiment of the present invention, the protective sleeve is sleeved on the outer peripheral surface of the air nozzle assembly and the lower connector; the direction from the air nozzle opening to the pressure transmission hole is a first direction, and the first direction, the elastic deformation direction of the elastic element, and the axial direction of the adjusting sleeve are parallel; the elastic element is configured as an adjusting spring sleeved on the outer peripheral surface of the lower connector, and an adjusting ring is provided on the outer peripheral surface of the lower connector; one end of the adjusting spring along the elastic deformation direction abuts against the adjusting ring, and the other end abuts against the end face of the protective sleeve near the adjusting spring through a first spring washer.

[0009] According to at least one embodiment of the present invention, the nozzle assembly has an abutment protrusion, and the nozzle opening is located on the side of the abutment protrusion near the protective sleeve; an air injection space is defined between the first sealing surface and the nozzle assembly, and includes a sealing end face located at the end of the protective sleeve and a third radial surface located on the side of the air injection space near the pressure transmission hole, the sealing end face being adapted to abut the abutment protrusion to seal the air injection space, and the pressure-bearing area of ​​the third radial surface bearing the hydraulic pressure in the air injection space being equal to the pressure-bearing area of ​​the first radial surface bearing the hydraulic pressure in the sealing cavity.

[0010] According to at least one embodiment of the present invention, the protective sleeve is provided with a first protrusion extending inward and defining a space between the air injection space and the sealing cavity, and a second protrusion defining a side of the sealing cavity away from the air injection space. The air nozzle assembly is provided with a third protrusion extending outward and corresponding to the first protrusion. The lower connector is provided with a fourth protrusion extending outward and corresponding to the second protrusion. A plurality of O-rings are provided at the contact positions of the first protrusion and the third protrusion, and at the contact positions of the second protrusion and the fourth protrusion.

[0011] According to at least one embodiment of the present invention, the air nozzle assembly includes an air nozzle seat and an air nozzle. The air nozzle seat is sleeved on the outer peripheral surface of the adjusting sleeve and faces the adjusting sleeve. The outer peripheral surface of the air nozzle seat is provided with the abutting protrusion and the third protrusion. The inner peripheral surface of the end away from the abutting protrusion is provided as an undulating mounting surface and forms an installation space with the adjusting sleeve. One end of the lower connector is adapted to be inserted into the installation space and its outer peripheral surface is adapted to be fitted with the undulating mounting surface. The air nozzle seat is fixedly connected to the air nozzle at a position near the air injection channel, and the air nozzle has the air nozzle opening.

[0012] According to at least one embodiment of the present invention, the undulating mounting surface includes at least one circumferentially extending groove-shaped surface, and the lower connector protrudes an annular body adapted to fit into the groove-shaped surface.

[0013] According to at least one embodiment of the present invention, a plurality of O-rings are provided between the undulating mounting surface and the outer peripheral surface of the lower connector.

[0014] According to at least one embodiment of the present invention, the end of the air nozzle seat away from the abutting protrusion is connected to the lower connector by a pin.

[0015] According to at least one embodiment of the present invention, the adjusting sleeve has a movable retaining ring assembly on the outer peripheral surface of the first end along the axial direction, and an inner sealing cone surface that gradually narrows along the first direction at the second end. The air injection channel is located at the inner sealing cone surface, and the air nozzle is provided with an outer sealing cone surface adapted to abut against the inner sealing cone surface. The air nozzle opening is located on the outer sealing cone surface. The retaining ring assembly includes a movable cylinder sleeved on the outer peripheral surface of the first end and a spring retaining ring connected to one end of the movable cylinder near the second end. A pre-tightening spring is sleeved on the outer peripheral surface of the movable cylinder. One end of the pre-tightening spring along the elastic deformation direction is adapted to push against the spring retaining ring, and the other end is fixedly disposed. A stepped surface is provided on the outer peripheral surface of the first end for the spring retaining ring to push against. A second spring washer is provided between the spring retaining ring and the stepped surface.

[0016] According to at least one embodiment of the present invention, a groove is provided on the inner wall of the air nozzle on the side of the outer sealing cone near the lower connector. The groove extends circumferentially along the air nozzle, and a low-resistance rotary sealing module is provided in the groove to achieve axial contact sealing between the adjusting sleeve and the air nozzle.

[0017] According to at least one embodiment of the present invention, the first end is adapted to be driven by the output end of a power supply motor, and the motor rotates to drive the adjusting sleeve to rotate circumferentially relative to the air nozzle assembly.

[0018] According to at least one embodiment of the present invention, the end face of the first end is provided with an installation opening and its side wall is provided with a strip-shaped torque transmission groove near the installation opening. The installation opening is suitable for a drive shaft to pass through. One end of the drive shaft is provided with a boss on its outer circumferential surface that is suitable for insertion into the strip-shaped torque transmission groove, and the other end is driven by the output end of the motor to rotate circumferentially. The strip-shaped torque transmission groove and the boss are evenly arranged in multiples along the circumference of the nozzle opening adjustment mandrel.

[0019] According to at least one embodiment of the present invention, the integrated gas distribution device structure for gas injection regulation and static pressure measurement further includes a positioning connector and an upper connector. The positioning connector includes a first wall, an intermediate wall, and a second wall connected in sequence. The first wall surrounds the circumferential outer side of the pre-tightening spring and is sleeved on the outer circumferential surface of the nozzle seat. The first wall is connected to the nozzle seat by a pin, and a plurality of O-rings are provided at the contact position between the first wall and the nozzle seat. The intermediate wall extends toward the axis of the adjusting sleeve to abut against the pre-tightening spring. The second wall has a clearance hole at its end face for the transmission shaft to pass through.

[0020] According to at least one embodiment of the present invention, one end of the upper connector is sleeved on the outer peripheral surface of the second wall of the positioning connector and connected to the second wall by a pin, and a plurality of O-rings are provided at the contact position between the upper connector and the second wall to ensure sealing.

[0021] The present invention has the following advantages due to the adoption of the above technical solutions:

[0022] I. This invention combines the gas injection function and the static pressure measurement function. Specifically, during static pressure measurement, the gas injection channel and the gas nozzle opening are completely aligned. The test instrument sleeve is sealed on both sides of the gas injection channel within the flow channel. Hydraulic pressure from the oil pipe introduced into the sealed cavity through the pressure transmission hole acts on the first and second radial surfaces respectively. Because the pressure-bearing area of ​​the second radial surface that bears the hydraulic pressure in the sealed cavity is greater than that of the first radial surface, the protective sleeve moves under hydraulic pressure, causing the second sealing surface to change from a sealed state (sealing the gas nozzle opening) to an open state (opening the gas nozzle opening). At this time, the external pressure, i.e., the formation pressure... Force is introduced into the testing instrument through the nozzle opening, and the formation static pressure is measured. During normal gas injection, the gas injection channel and the nozzle opening coincide. At this time, the pressure inside the oil pipe is higher than the external pressure. Hydraulic pressure is applied to the first radial surface and the second radial surface through the pressure transmission hole. Since the pressure-bearing area of ​​the second radial surface that bears the hydraulic pressure in the sealing cavity is greater than that of the first radial surface, the protective sleeve moves under the hydraulic pressure, causing the second sealing surface to change from the sealed state of sealing the nozzle opening to the open state of opening the nozzle opening. This function can effectively avoid the erosion of the sealing end face of the protective sleeve by the high-pressure airflow at the moment of opening caused by the opening method of using the nozzle pressure transmission.

[0023] Second, during normal air injection, the protective sleeve can only be opened by transmitting pressure through the lower connector pressure hole, avoiding the erosion of the second sealing surface of the protective sleeve by the high-pressure airflow at the moment of opening caused by the air nozzle pressure transmission method.

[0024] Third, by rotating the adjusting sleeve to adjust the overlapping flow area of ​​the air injection channel and the air nozzle opening, the air injection flow rate is adjusted, realizing stepless air injection adjustment and improving the accuracy of flow control.

[0025] Fourth, this invention combines the gas injection function structure and the static pressure measurement function structure, so that the two functions work together to simplify the operation process and product structure, and reduce manufacturing costs. At the same time, the simplification of the operation process and product structure can also reduce the risk of sealing leakage and improve the reliability of the process. Attached Figure Description

[0026] Figure 1 This is a cross-sectional schematic diagram of the integrated gas distributor structure for gas injection regulation and static pressure measurement in at least one embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the regulating sleeve structure of the integrated gas distributor structure for gas injection regulation and static pressure measurement in at least one embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the protective sleeve structure of the integrated gas distributor structure for gas injection regulation and static pressure measurement in at least one embodiment of the present invention.

[0029] Marked in the attached diagram:

[0030] 1 is the upper connector;

[0031] 2 is a positioning connector;

[0032] 3 represents a preload spring;

[0033] 4 is a spring retaining ring;

[0034] 5 is the second spring washer;

[0035] 6 is the adjusting sleeve;

[0036] 7 is the valve seat;

[0037] 8 represents the air valve;

[0038] 9 is a protective sleeve;

[0039] 10 is the lower connector;

[0040] 11 is the first spring washer;

[0041] 12 is the adjusting spring;

[0042] 13 is the adjusting ring;

[0043] 14 is an O-ring;

[0044] 15 is a pin;

[0045] 16 is an O-ring;

[0046] 17 is a pin;

[0047] 18 is an O-ring;

[0048] 19 is an O-ring;

[0049] 20 is a pin;

[0050] 601 is a transmission torsion groove;

[0051] 602 is the gas injection channel;

[0052] 901 is the sealing end face;

[0053] 902 is the second radial surface;

[0054] 903 is the third radial surface;

[0055] 904 is the first radial surface;

[0056] 1001 is the pressure transmission port. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0058] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the system or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0059] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "assembly," "setup," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0060] This invention provides an integrated gas distributor structure that combines gas injection control and static pressure measurement. Hydraulic pressure in the oil pipe is transmitted to the sealed cavity through a pressure transmission hole. Because the pressure-bearing area of ​​the second radial surface that bears the hydraulic pressure in the sealed cavity is greater than that of the first radial surface, the protective sleeve moves, thus changing from a sealed state (sealing the gas nozzle opening) to an open state (opening the gas nozzle opening). In this open state, the gas nozzle opening and the gas injection channel that overlaps and connects with it can be used to introduce external pressure, i.e., formation pressure, for pressure measurement, and can also be used for external gas injection, etc. In other words, this invention combines the gas injection function structure and the static pressure measurement function structure.

[0061] The integrated gas distributor structure for gas injection regulation and static pressure measurement provided in the embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0062] Reference Figures 1 to 3As shown, in at least one embodiment, the integrated gas distributor structure for gas injection regulation and static pressure measurement includes: an adjusting sleeve 6, a nozzle assembly, a lower connector 10, and a protective sleeve 9. The adjusting sleeve 6 has a flow channel formed inside and a gas injection channel 602 communicating with the flow channel is opened on its side wall; the nozzle assembly is sleeved on the outer circumferential surface of the adjusting sleeve 6 and has a nozzle opening suitable for communicating with the gas injection channel 602; the adjusting sleeve 6 is adapted to adjust the gas injection flow rate by adjusting the overlapping flow area of ​​the gas injection channel 602 and the nozzle opening; the lower connector 10 is connected to the nozzle assembly, has a channel communicating with the flow channel inside, and a pressure transmission hole 1001 communicating with the channel is opened on its side wall; the protective sleeve 9 has a first sealing cavity that covers the nozzle opening away from the outside of the channel. The sealing surface and the second sealing surface covering the pressure transmission hole 1001 away from the outside of the channel. The second sealing surface includes a first radial surface 904 and a second radial surface 902 located on opposite sides of the sealing cavity. The first radial surface 904 is located on the side of the sealing cavity near the air nozzle opening. The pressure-bearing area of ​​the second radial surface 902 that bears the hydraulic pressure in the sealing cavity is greater than the pressure-bearing area of ​​the first radial surface 904, so that the protective sleeve 9 can be driven to move by the hydraulic pressure in the sealing cavity, thereby changing the second sealing surface from the sealed state of sealing the air nozzle opening to the open state of opening the air nozzle opening.

[0063] In the above embodiment, the lower connector 10 is suitable for connecting to the oil pipe, the channel in the lower connector 10 is connected to the flow channel, and the flow channel formed in the adjusting sleeve 6 is suitable for setting the test instrument rubber tube at the upper and lower positions corresponding to the air injection channel 602.

[0064] During static pressure measurement, the air injection channel 602 and the air nozzle opening are completely aligned. The flow channel is suitable for sealing the test instrument's rubber sleeve on both the upper and lower sides of the air injection channel 602. Hydraulic pressure from the oil pipe introduced into the sealed cavity through the pressure transmission hole 1001 acts on the first radial surface 904 and the second radial surface 902 respectively. Since the pressure-bearing area of ​​the second radial surface 902 bearing the hydraulic pressure in the sealed cavity is greater than that of the first radial surface 904, the protective sleeve 9 moves under hydraulic pressure, causing the second sealing surface to change from a sealed state (sealed air nozzle opening) to an open state (open air nozzle opening). At this time, external pressure, i.e., formation pressure, is introduced into the test instrument through the air nozzle opening. Static pressure is measured; during normal air injection, the air injection channel 602 and the air nozzle opening coincide. At this time, the pressure inside the oil pipe is higher than the external pressure. The hydraulic pressure acts on the first radial surface 904 and the second radial surface 902 respectively through the pressure transmission hole 1001. Since the pressure-bearing area of ​​the second radial surface 902 bearing the hydraulic pressure in the sealing cavity is greater than the pressure-bearing area of ​​the first radial surface 904, the protective sleeve 9 moves under the hydraulic pressure, so that the second sealing surface changes from the sealed state of sealing the air nozzle opening to the open state of opening the air nozzle opening. This function can effectively avoid the erosion of the second sealing surface of the protective sleeve 9 by the high-pressure airflow at the moment of opening caused by the pressure transmission opening method of the air nozzle 8.

[0065] It is worth noting that during normal gas injection, the protective sleeve 9 can only be opened using the pressure transmission hole 1001 of the lower connector 10, avoiding the erosion of the second sealing surface of the protective sleeve 9 by the high-pressure airflow at the moment of opening caused by the pressure transmission opening method using the air nozzle 8. This invention adjusts the gas injection flow rate by rotating the adjusting sleeve 6 to adjust the overlapping flow area of ​​the gas injection channel 602 and the air nozzle opening, achieving stepless gas injection adjustment and improving flow rate control accuracy. Furthermore, by combining the gas injection function structure and the static pressure measurement function structure, the two functions work together, simplifying the operation process and product structure, and reducing manufacturing costs. The simplified operation process and product structure also reduce the risk of seal leakage and improve process reliability.

[0066] The air injection channels 602 are symmetrically distributed on opposite sides of the adjusting sleeve 6 along the circumference, and the air nozzle openings are symmetrically distributed on opposite sides of the air nozzle assembly along the circumference. When the air injection channels 602 and the air nozzle openings are completely offset, the injected air cannot enter the external space, and the flow channel is in a completely closed state. When the adjusting sleeve 6 begins to rotate, the air injection channels 602 begin to slowly overlap with the air nozzle openings. By adjusting the overlapping flow area, the purpose of controlling the air injection flow rate can be achieved.

[0067] Optionally, in at least one embodiment, the protective sleeve 9 is connected to the lower connector 10 via an elastic element. The elastic deformation direction of the elastic element is consistent with the movement direction of the protective sleeve 9. The elastic element is configured to drive the protective sleeve 9 to move in the opposite direction, causing the second sealing surface to retract to a sealing state. Thus, when the hydraulic pressure in the sealing cavity is removed, the elastic element releases its elastic potential energy, driving the protective sleeve 9 to move in the opposite direction and sealing the gas nozzle opening. It should be noted that in this embodiment, during gas injection and static pressure measurement, the pressure applied by the hydraulic pressure in the sealing cavity to drive the protective sleeve 9 to move is greater than the elastic force of the elastic element when compressed.

[0068] Furthermore, in at least one embodiment, the protective sleeve 9 is fitted onto the outer peripheral surface of the air nozzle assembly and the lower connector 10; the direction from the air nozzle opening to the pressure transmission hole 1001 is the first direction, and the first direction, the elastic deformation direction of the elastic element, and the axial direction of the adjusting sleeve 6 are parallel; the elastic element is configured as an adjusting spring 12 fitted onto the outer peripheral surface of the lower connector 10, and an adjusting ring 13 is provided on the outer peripheral surface of the lower connector 10. One end of the adjusting spring 12 in the elastic deformation direction abuts against the adjusting ring 13, and the other end abuts against the end of the protective sleeve 9 near the adjusting spring 12 via a first spring washer 11. In this embodiment, the first direction is also the direction in which the protective sleeve 9 moves from a sealed state of sealing the air nozzle opening to an open state of opening the air nozzle opening. The adjusting ring 13 can be adjusted along the axial direction of the lower connector 10 to limit the adjusting spring 12 to different positions.

[0069] However, this design is not limited to this. In other embodiments, the protective sleeve 9 can be configured to cover a portion of the outer peripheral surface of the air nozzle assembly and the lower connector 10. Compared with this embodiment, the protective sleeve 9 in the above embodiment is configured as a sleeve connection, which has the advantages of wide coverage of the protective area, ensuring sealing effect and connection stability.

[0070] In some other embodiments, the first direction and the elastic deformation direction of the elastic element may form an angle with the axial direction of the adjusting sleeve 6. Optionally, the elastic element may also be, for example, an elastic bellows.

[0071] Optionally, in at least one embodiment, the nozzle assembly has an abutment protrusion, and the nozzle opening is located on the side of the abutment protrusion near the protective sleeve 9; an air injection space is defined between the first sealing surface and the nozzle assembly, and includes a sealing end face 901 located at the end of the protective sleeve 9 and a third radial surface 903 located on the side of the air injection space near the pressure transmission hole 1001. The sealing end face 901 is adapted to abut the abutment protrusion to seal the air injection space, and the pressure-bearing area of ​​the third radial surface 903 bearing the hydraulic pressure in the air injection space is equal to the pressure-bearing area of ​​the first radial surface 904 bearing the hydraulic pressure in the sealing cavity. In this embodiment, during normal air injection, the hydraulic pressure of the flow channel formed inside the adjusting sleeve 6 is transmitted to the air injection space through the air injection channel 602 and the air nozzle opening, and applies pressure along the first direction to the third radial surface 903. Meanwhile, the hydraulic pressure inside the sealing cavity applies pressure opposite to the first direction to the first radial surface 904. The pressures of the two cancel each other out, so the hydraulic pressure on the second radial surface 902 can effectively drive the protective sleeve 9 to move along the first direction, thereby improving the trigger sensitivity of the movement of the protective sleeve 9.

[0072] When the second sealing surface is in a sealed state, the adjusting spring 12 applies a force opposite to the first direction to make the sealing end face 901 of the protective sleeve 9 tightly abut against the abutting protrusion, thereby ensuring the sealing performance.

[0073] Optionally, in at least one embodiment, the protective sleeve 9 has a first protrusion extending inward, defining the space between the air injection space and the sealing cavity, and a second protrusion defining the side of the sealing cavity away from the air injection space. The nozzle assembly has a third protrusion extending outward, corresponding to the first protrusion. The lower connector 10 has a fourth protrusion extending outward, corresponding to the second protrusion. A plurality of O-rings 18 are provided at the contact positions of the first and third protrusions, and at the contact positions of the second and fourth protrusions. In this embodiment, the first, second, third, and fourth protrusions and the first sealing surface together form a sealing cavity, and the first, third, second sealing surface, and the abutting protrusion together form an air injection space. The first and third protrusions are movably abutting each other, and a plurality of O-rings 18 are provided at their contact positions to ensure a sealing effect; the second and fourth protrusions are movably abutting each other, and a plurality of O-rings 18 are provided at their contact positions to ensure a sealing effect.

[0074] Furthermore, in at least one embodiment, the nozzle assembly includes a nozzle seat 7 and a nozzle 8. The nozzle seat 7 is sleeved on the outer peripheral surface of the adjusting sleeve 6 and faces upwards. The outer peripheral surface of the nozzle seat 7 is provided with an abutment protrusion and a third protrusion. The inner peripheral surface of the end away from the abutment protrusion is provided with an undulating mounting surface, forming an installation space with the adjusting sleeve 6. One end of the lower connector 10 is adapted to be inserted into the installation space, and its outer peripheral surface is adapted to be fitted with the undulating mounting surface. The nozzle seat 7 is fixedly connected to the nozzle 8 near the air injection channel 602, and the nozzle 8 has a nozzle opening. In this embodiment, the mating surface of the nozzle seat 7 and the lower connector 10 is provided with an undulating mounting surface, which can ensure installation stability and sealing effect.

[0075] Optionally, in at least one embodiment, the undulating mounting surface includes at least one circumferentially extending groove-shaped surface, and the lower connector 10 protrudes with a ring body adapted to engage with the groove-shaped surface. After the ring body is engaged with the groove-shaped surface, the outer wall surface of the ring body abuts tightly against the groove-shaped surface. Figure 1 In the embodiment shown, the groove-shaped surface is set to one.

[0076] Optionally, in one embodiment, a plurality of O-rings 19 are provided between the undulating mounting surface and the outer peripheral surface of the lower connector 10 to ensure the sealing between the air nozzle seat 7 and the lower connector 10. Optionally, the O-rings 19 are located on the side of the grooved surface opposite to the adjusting spring 12.

[0077] Optionally, in at least one embodiment, the end of the nozzle seat 7 away from the abutting protrusion is connected to the lower connector 10 by a pin 20. After the nozzle seat 7 and the lower connector 10 are engaged, the pin 20 can be used to securely connect the two.

[0078] Optionally, in at least one embodiment, the adjusting sleeve 6 has a movable retaining ring assembly on the outer circumferential surface of its first end along the axial direction, and an inner sealing cone surface that gradually narrows along the first direction at its second end. An air injection channel 602 is located at the inner sealing cone surface, and an air nozzle 8 is provided with an outer sealing cone surface adapted to abut against the inner sealing cone surface. The air nozzle opening is located on the outer sealing cone surface. The retaining ring assembly includes a movable cylinder sleeved on the outer circumferential surface of the first end and a spring retaining ring 4 connected to one end of the movable cylinder near the second end. A preload spring 3 is sleeved on the outer circumferential surface of the movable cylinder. One end of the preload spring 3 along the elastic deformation direction is adapted to push against the spring retaining ring 4, and the other end is fixedly disposed. The outer circumferential surface of the first end of the adjusting sleeve 6 is provided with a stepped surface for the spring retaining ring 4 to abut against. A second spring washer 5 is disposed between the spring retaining ring 4 and the stepped surface. In this embodiment, the preload spring 3 can push the adjusting sleeve 6 to move in the first direction, thereby ensuring a tight seal between the inner and outer sealing cone surfaces and guaranteeing airtightness.

[0079] Understandably, since the adjusting sleeve 6 and the air nozzle 8 are rotatably connected, and the connection between the air injection channel 602 and the air nozzle opening frequently alternates, it is necessary to ensure the sealing performance of the adjusting sleeve 6 and the air nozzle 8 in the air injection position. In this embodiment, the tight contact between the inner sealing cone surface and the outer sealing cone surface, which are inclined to the direction of the preload spring 3 (first direction), ensures the sealing performance of the adjusting sleeve 6 and the air nozzle 8 in the air injection position during rotation.

[0080] Optionally, in at least one embodiment, a groove is formed on the inner wall of the air nozzle 8 on the side of the outer sealing cone surface near the lower connector 10. The groove extends circumferentially along the air nozzle 8, and a low-resistance rotary sealing module is provided in the groove to achieve axial contact sealing between the adjusting sleeve 6 and the air nozzle 8. In this way, the sealing performance between the adjusting sleeve 6 and the air nozzle 8 in the air injection position can be further guaranteed during the axial rotation of the adjusting sleeve 6.

[0081] Optionally, in at least one embodiment, the first end is adapted to be driven by the output of a power supply motor, and the motor rotation drives the adjusting sleeve 6 to rotate circumferentially relative to the nozzle assembly. Thus, by driving the adjusting sleeve 6 to rotate via motor transmission, the flow control accuracy can be improved, especially when the motor is configured as a servo motor.

[0082] Optionally, in at least one embodiment, the end face of the first end has an installation opening, and its side wall surface near the installation opening has a strip-shaped torque transmission groove 601. The installation opening is suitable for a drive shaft to pass through. One end of the drive shaft has a boss on its outer circumferential surface that is suitable for insertion into the strip-shaped torque transmission groove 601, and the other end is driven by the output end of a motor to rotate circumferentially. Multiple strip-shaped torque transmission grooves 601 and bosses are evenly arranged circumferentially along the nozzle opening adjustment mandrel. In this way, the motor can drive the adjustment sleeve 6 to rotate. Optionally, the outer circumferential surface of the drive shaft is sealed to the inner wall surface of the first end to ensure sealing. However, this design is not limited to this; in other embodiments, the motor can also drive the adjustment sleeve 6 to rotate through other types of structures, such as gears.

[0083] Furthermore, the strip-shaped torque transmission groove 601 extends axially along the adjusting sleeve 6 to ensure a sufficiently long force-bearing area, thereby enabling the transmission shaft to better drive the adjusting sleeve 6 to rotate.

[0084] Optionally, in at least one embodiment, the integrated gas distributor structure for gas injection regulation and static pressure measurement further includes a positioning connector 2 and an upper connector 1. The positioning connector 2 includes a first wall, an intermediate wall, and a second wall connected in sequence. The first wall surrounds the pre-tightening spring 3 outward and is sleeved on the outer peripheral surface of the nozzle seat 7. The first wall is connected to the nozzle seat 7 by a pin 17, and several O-rings 16 are provided at the contact position between the first wall and the nozzle seat 7 to ensure sealing. The intermediate wall extends toward the axis of the adjusting sleeve 6 to abut against the pre-tightening spring 3. The second wall has a clearance hole at its end face for the drive shaft to pass through.

[0085] Furthermore, in at least one embodiment, one end of the upper connector 1 is sleeved on the outer peripheral surface of the second wall of the positioning connector 2 and connected to the second wall via a pin 15. A plurality of O-rings 14 are provided at the contact position between the upper connector 1 and the second wall to ensure sealing. In this embodiment, the upper connector 1 and the lower connector 10 are respectively adapted to connect to the oil pipe, thereby achieving connection to the tubing string.

[0086] It should be noted that the "and / or" in the text includes three options. Taking "A and / or B" as an example, it includes technical option A, technical option B, and technical option that satisfies both A and B.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A gas distributor structure integrating gas injection regulation and static pressure measurement, characterized in that, include: An adjusting sleeve has an internal flow channel, and the side wall of the adjusting sleeve has an air injection channel that communicates with the flow channel. An air nozzle assembly is sleeved on the outer peripheral surface of the adjusting sleeve and has an air nozzle opening suitable for connecting the air injection channel. The adjusting sleeve is adapted to adjust the overlapping flow area of ​​the air injection channel and the air nozzle opening to adjust the air injection flow rate. The lower connector is connected to the air nozzle assembly and has a channel that communicates with the flow channel. The side wall of the lower connector is provided with a pressure transmission hole that communicates with the channel. The protective sleeve has a first sealing surface covering the air nozzle opening away from the outside of the channel and forming a sealed cavity, and a second sealing surface covering the pressure transmission hole away from the outside of the channel. The second sealing surface includes a first radial surface and a second radial surface located on opposite sides of the sealed cavity. The first radial surface is located on the side of the sealed cavity closer to the air nozzle opening. The pressure-bearing area of ​​the second radial surface that bears the hydraulic pressure in the sealed cavity is greater than the pressure-bearing area of ​​the first radial surface, so that the protective sleeve can be driven to move by the hydraulic pressure in the sealed cavity, thereby changing the first sealing surface from a sealed state that seals the air nozzle opening to an open state that opens the air nozzle opening. The protective sleeve is connected to the lower connector via an elastic element, the elastic element being configured as an adjusting spring sleeved on the outer peripheral surface of the lower connector, and an adjusting ring being provided on the outer peripheral surface of the lower connector; The nozzle assembly has an abutting protrusion, and the nozzle opening is located on the side of the abutting protrusion near the protective sleeve; the first sealing surface and the nozzle assembly define an air injection space, and include a sealing end face located at the end of the protective sleeve and a third radial surface located on the side of the air injection space near the pressure transmission hole; The protective sleeve has a first protrusion extending inward, which is defined between the air injection space and the sealing cavity, and a second protrusion defining the sealing cavity on the side away from the air injection space. The air nozzle assembly has a third protrusion extending outward, which corresponds to the first protrusion. The lower connector has a fourth protrusion extending outward, which corresponds to the second protrusion. The air nozzle assembly includes an air nozzle seat and an air nozzle. The adjusting sleeve has a movable retaining ring assembly on its outer circumferential surface at its first end along the axial direction, and an inner sealing cone surface that tapers in a first direction at its second end. The air injection channel is located at the inner sealing cone surface. The air nozzle has an outer sealing cone surface adapted to abut against the inner sealing cone surface, and an opening is located on the outer sealing cone surface. The retaining ring assembly includes a movable cylinder sleeved on the outer circumferential surface of the first end, and a spring retaining ring connected to one end of the movable cylinder near the second end. A preload spring is sleeved on the outer circumferential surface of the movable cylinder. One end of the preload spring along the elastic deformation direction is adapted to push against the spring retaining ring, and the other end is fixedly disposed. The outer circumferential surface of the first end has a stepped surface for the spring retaining ring to push against, and a second spring washer is disposed between the spring retaining ring and the stepped surface; and / or A groove is provided on the inner wall of the air nozzle on the side of the outer sealing cone near the lower connector. The groove extends circumferentially along the air nozzle. A low-resistance rotary sealing module is provided in the groove to achieve axial contact sealing between the adjusting sleeve and the air nozzle.

2. The integrated gas distributor structure for gas injection regulation and static pressure measurement according to claim 1, characterized in that, The elastic deformation direction of the elastic element is consistent with the movement direction of the protective sleeve.

3. The integrated gas distributor structure for gas injection regulation and static pressure measurement according to claim 2, characterized in that, The protective sleeve is fitted onto the outer peripheral surface of the air nozzle assembly and the lower connector; The direction from the air nozzle opening to the pressure transmission hole is the first direction, and the first direction, the elastic deformation direction of the elastic element, and the axial direction of the adjusting sleeve are parallel. One end of the adjusting spring along the elastic deformation direction abuts against the adjusting ring, and the other end abuts against the end face of the protective sleeve near the adjusting spring via a first spring washer.

4. The integrated gas distributor structure for gas injection regulation and static pressure measurement according to claim 3, characterized in that, The sealing end face is adapted to abut against the abutment protrusion to seal the air injection space, and the pressure-bearing area of ​​the third radial surface bearing the hydraulic pressure in the air injection space is equal to the pressure-bearing area of ​​the first radial surface bearing the hydraulic pressure in the sealing cavity.

5. The integrated gas distributor structure for gas injection regulation and static pressure measurement according to claim 4, characterized in that, Several O-rings are provided at the contact positions of the first protrusion and the third protrusion, and at the contact positions of the second protrusion and the fourth protrusion.

6. The integrated gas distributor structure for gas injection regulation and static pressure measurement according to claim 5, characterized in that, The air nozzle seat is sleeved on the outer peripheral surface of the adjusting sleeve, and the outer peripheral surface of the air nozzle seat is provided with the abutting protrusion and the third protrusion. The inner peripheral surface of the end away from the abutting protrusion is provided as an undulating mounting surface and forms an installation space with the adjusting sleeve. One end of the lower connector is adapted to be inserted into the installation space and its outer peripheral surface is adapted to be fitted with the undulating mounting surface. The air nozzle seat is fixed to the air nozzle at a position near the air injection channel, and the air nozzle has the air nozzle opening.

7. The integrated gas distributor structure for gas injection regulation and static pressure measurement according to claim 6, characterized in that, The undulating mounting surface includes at least one circumferentially extending groove-shaped surface, and the lower connector protrudes with an annular body adapted to engage the groove-shaped surface; and / or A plurality of O-rings are provided between the undulating mounting surface and the outer peripheral surface of the lower connector; and / or The end of the air nozzle seat away from the abutting protrusion is connected to the lower connector by a pin.

8. The integrated gas distributor structure for gas injection regulation and static pressure measurement according to claim 6, characterized in that, The first end is adapted for a drive connection to the output end of a power supply motor, the motor rotating to drive the adjusting sleeve to rotate circumferentially relative to the air nozzle assembly; and / or The first end has an opening for mounting, and the side wall of the first end has a strip-shaped torque transmission groove near the mounting opening. The mounting opening is suitable for a drive shaft to pass through. One end of the drive shaft has a boss on its outer circumferential surface that is suitable for insertion into the strip-shaped torque transmission groove, and the other end is driven by the output end of the motor to rotate circumferentially. Multiple strip-shaped torque transmission grooves and bosses are evenly arranged along the circumference of the air nozzle opening adjustment spindle.

9. The integrated gas distributor structure for gas injection regulation and static pressure measurement according to claim 8, characterized in that, The integrated gas distribution device structure for gas injection regulation and static pressure measurement also includes a positioning connector and an upper connector. The positioning connector includes a first wall, an intermediate wall, and a second wall connected in sequence. The first wall surrounds the circumferential outer side of the pre-tension spring and is sleeved on the outer circumferential surface of the nozzle seat. The first wall is connected to the nozzle seat by a pin, and several O-rings are provided at the contact position between the first wall and the nozzle seat. The intermediate wall extends towards the axis of the adjusting sleeve to abut against the pre-tension spring. The second wall has a clearance hole at its end face for the drive shaft to pass through; and / or One end of the upper connector is sleeved on the outer peripheral surface of the second wall of the positioning connector and connected to the second wall via a pin. Several O-rings are provided at the contact position between the upper connector and the second wall to ensure sealing.

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