Continuous sand washing device without stopping pump

Abstract

The utility model relates to the technical field of well washing, in particular to a continuous sand washing device without stopping a pump. Comprising an upper connector, the lower end of the upper connector is fixedly and hermetically connected with a double-channel body, the lower end of the double-channel body is fixedly and hermetically connected with a lower connector, an axial channel and a radial channel which are mutually independent are formed in the double-channel body, sealing conical surfaces are machined in the upper connector and the double-channel body, and one-way valve sets are installed in the upper connector and the lower connector. The one-way valve set in the upper connector is matched with the sealing conical surface in the upper connector and conducts one-way plugging on the upper connector, and the one-way valve set in the lower connector is matched with the sealing conical surface in the double-channel body and conducts one-way plugging on the radial channel. Through cooperative control of the axial channel, the radial channel and the one-way valve set, the device can switch the flow direction of flushing fluid under the condition that a pump is not stopped.

Description

Technical Field

[0001] This utility model relates to the field of well cleaning technology, specifically to a continuous sand flushing device that does not stop the pump. Background Technology

[0002] In the well flushing process in the oil industry, as the well depth increases, the number of tubing pipes needs to be continuously increased. Connecting the tubing pipes requires stopping the pump. If the connection takes too long, the floating sand in the casing may fall back and cause sand to jam the tubing string, making it impossible to carry out the construction normally. It has the disadvantages of low efficiency and high labor consumption, and it is also easy to cause well flushing fluid leakage and environmental pollution. Utility Model Content

[0003] The main objective of this invention is to provide a device that enables continuous sand flushing operations in oil wells. This device achieves continuous sand flushing without stopping the pump by adjusting the fluid inlet direction through a dual-channel system.

[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0005] The continuous sand flushing device without stopping the pump includes an upper connector, a double-channel body fixedly and sealed to the lower end of the upper connector, and a lower connector fixedly and sealed to the lower end of the double-channel body. The double-channel body has independent axial and radial channels. Both the upper connector and the double-channel body have machined sealing cone surfaces. One-way valve assemblies are installed in both the upper and lower connectors. The one-way valve assembly in the upper connector engages with the sealing cone surface in the upper connector to provide one-way sealing to the upper connector. The one-way valve assembly in the lower connector engages with the sealing cone surface in the double-channel body to provide one-way sealing to the radial channel. When the flushing fluid flows downwards in the upper connector, the upper one-way valve assembly opens, and the flushing fluid is discharged through the axial channel and the lower connector, while the lower one-way valve assembly maintains the sealing of the radial channel. After the flushing fluid enters the radial channel, the lower one-way valve assembly opens, and the flushing fluid is discharged through the lower connector, while the upper one-way valve assembly maintains the sealing of the upper connector.

[0006] Specifically, the one-way valve assembly includes a baffle with multiple through holes. An adjusting bolt passes through the baffle and is slidably connected to the baffle. The adjusting bolt and the baffle are concentric. A ball support is threaded to the upper end of the adjusting bolt. A spring is installed between the ball support and the baffle. A steel ball is installed on the ball support and makes sealing contact with the sealing cone surface.

[0007] Specifically, the baffle of the upper one-way valve group is threadedly connected to the upper connector, and the baffle of the lower one-way valve group is threadedly connected to the lower connector. The steel ball of the upper one-way valve group is in sealing contact with the sealing cone surface in the upper connector, and the steel ball of the lower one-way valve group is in sealing contact with the sealing cone surface in the dual-channel body.

[0008] Specifically, the spring is sleeved on the adjusting bolt, with the upper end of the spring tightly abutting the ball support and the lower end of the spring tightly abutting the baffle.

[0009] Specifically, the dual-channel body is detachably and fixedly sealed with a lateral liquid inlet connector that communicates with the radial channel.

[0010] Specifically, the lateral liquid inlet connector is fixed on the clamp, and one end of the lateral liquid inlet connector is sealed and inserted into the slot on the dual-channel body. The clamp is equipped with fastening bolts, which tighten the clamp onto the dual-channel body.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. Through the coordinated control of the axial and radial channels and the one-way valve assembly, the device can switch the flow direction of the well-washing fluid without stopping the pump. When connecting the tubing, the sand flushing operation can be maintained through the radial channel without stopping the pump, completely avoiding the construction interruption caused by pump stoppage in traditional processes, significantly shortening the operation time and reducing the frequency of manual intervention.

[0013] 2. The upper and lower one-way valve assemblies employ a steel ball and sealing cone structure, combined with spring preload, to achieve bidirectional dynamic sealing. During axial fluid intake, the lower valve assembly automatically closes the radial channel; during radial fluid intake, the upper valve assembly closes the axial channel. This design effectively prevents backflow of the well-washing fluid and sand drop, fundamentally mitigating the risk of sand jamming the tubing and ensuring operational stability.

[0014] 3. The threaded connection between the adjusting bolt and the ball support in the one-way valve assembly allows for adjustment of the spring compression by turning the adjusting bolt, thereby precisely controlling the contact pressure between the steel ball and the sealing cone surface. This adjustable mechanism enables the device to flexibly meet the operating requirements of different pump pressures, flow rates, and sand particle sizes, expanding its application scenarios.

[0015] 4. The side inlet connector is connected to the dual-channel body via a clamp, allowing for installation or removal simply by tightening the bolts. This design ensures reliable sealing while avoiding the need for welding or complex machining, facilitating quick replacement of damaged parts on-site and reducing equipment downtime for maintenance.

[0016] 5. The continuous operation mode reduces the risk of pressure fluctuations and leakage caused by frequent pump start-ups and shutdowns of the well washing fluid. Simultaneously, the dual-channel directional flow characteristics allow for precise control of the sand flushing path, reducing ineffective fluid consumption. The combination of these two features effectively mitigates the problem of fluid leakage and pollution, meeting the requirements of green operations. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the device.

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure connecting the side inlet connector to the dual-channel body.

[0019] The components in the attached diagram are named as follows: Upper connector 1, steel ball 2, ball support 3, spring 4, baffle 5, adjusting bolt 6, dual-channel body 7, lower connector 8, side liquid inlet connector 9, clamp 10, fastening bolt 11, axial channel 12, radial channel 13. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Example 1: Refer to Figure 1 As shown, the continuous sand flushing device without stopping the pump includes an upper connector 1. The lower end of the upper connector 1 is fixedly and sealed to a double-channel body 7, and the lower end of the double-channel body 7 is fixedly and sealed to a lower connector 8. The double-channel body 7 has an independent axial channel 12 and a radial channel 13. Both the upper connector 1 and the double-channel body 7 are machined with sealing cone surfaces. Both the upper connector 1 and the lower connector 8 are equipped with one-way valve groups. The one-way valve group in the upper connector 1 cooperates with the sealing cone surface in the upper connector 1 to provide one-way sealing of the upper connector 1. The one-way valve group in the lower connector 8 cooperates with the sealing cone surface in the double-channel body 7 to provide one-way sealing of the radial channel 13. When the washing fluid flows downward in the upper connector 1, the upper one-way valve group opens, and the washing fluid is discharged through the axial channel 12 and the lower connector 8. The lower one-way valve group keeps the radial channel 13 sealed. After the washing fluid enters the radial channel 13, the lower one-way valve group opens, and the washing fluid is discharged through the lower connector 8. The upper one-way valve group keeps the upper connector 1 sealed.

[0022] The one-way valve assembly includes a baffle 5 with multiple through holes. An adjusting bolt 6 passes through the baffle 5 and is slidably connected to it, with the adjusting bolt 6 and the baffle 5 being concentric. A ball support 3 is threadedly connected to the upper end of the adjusting bolt 6. A spring 4 is installed between the ball support 3 and the baffle 5, sleeved on the adjusting bolt 6, with its upper end tightly abutting against the ball support 3 and its lower end tightly abutting against the baffle 5. A steel ball 2 is mounted on the ball support 3, and the steel ball 2 makes sealing contact with the sealing cone surface.

[0023] The baffle 5 of the upper one-way valve assembly is threaded into the upper connector 1, and the baffle 5 of the lower one-way valve assembly is threaded into the lower connector 8. The steel ball 2 of the upper one-way valve assembly is in sealing contact with the sealing cone surface in the upper connector 1, and the steel ball 2 of the lower one-way valve assembly is in sealing contact with the sealing cone surface in the dual-channel body 7.

[0024] Connecting this device to the tubing string allows for bidirectional fluid intake. During application, either the radial channel 13 or the axial channel 12 can be used for sand flushing, enabling sand flushing operations without stopping the pump.

[0025] When the fluid is introduced through the axial channel 12, the steel ball 2 inside the upper connector 1 compresses the upper spring 4 under the pressure of the well-washing fluid, thereby opening the upper one-way valve group. The well-washing fluid flows into the tubing string through the axial channel 12 of the dual-channel body 7 and the lower connector 8.

[0026] When the tubing needs to be reconnected, fluid is introduced through radial channel 13, the upper one-way valve assembly closes, and axial channel 12 is blocked. The flushing fluid in the lateral channel opens the steel ball 2 of the lower one-way valve assembly, enabling lateral fluid intake for sand flushing. This reciprocating cycle allows for continuous sand flushing without stopping the pump.

[0027] Example 2: Based on Example 1, referring to... Figure 2 As shown, a lateral inlet connector 9, which communicates with the radial channel 13, is detachably and fixedly sealed on the dual-channel body 7. Specifically, the lateral inlet connector 9 is fixed on the clamp 10, and one end of the lateral inlet connector 9 is sealed and inserted into a slot on the dual-channel body 7. A fastening bolt 11 is installed on the clamp 10, which causes the clamp 10 to tighten the dual-channel body 7.

[0028] The side inlet connector 9 can be quickly installed onto the dual-channel body 7 by using the clamp 10.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for continuous sand washing without pump shutdown, comprising an upper joint (1), characterized in that, The upper connector (1) is fixedly and sealed to the lower end of a double-channel body (7), and the lower end of the double-channel body (7) is fixedly and sealed to a lower connector (8). The double-channel body (7) has an independent axial channel (12) and a radial channel (13). Both the upper connector (1) and the double-channel body (7) are machined with sealing cone surfaces. Both the upper connector (1) and the lower connector (8) are equipped with one-way valve groups. The one-way valve group in the upper connector (1) cooperates with the sealing cone surface in the upper connector (1) and performs one-way sealing on the upper connector (1). The one-way valve group inside the connector (8) cooperates with the sealing cone surface inside the dual-channel body (7) and performs one-way sealing of the radial channel (13); when the washing fluid flows downward in the upper connector (1), the upper one-way valve group opens, and the washing fluid is discharged through the axial channel (12) and the lower connector (8), while the lower one-way valve group keeps the radial channel (13) sealed; after the washing fluid enters the radial channel (13), the lower one-way valve group opens, and the washing fluid is discharged through the lower connector (8), while the upper one-way valve group keeps the upper connector (1) sealed.

2. The apparatus according to claim 1, wherein The one-way valve assembly includes a baffle (5) with multiple through holes. An adjusting bolt (6) passes through the baffle (5) and is slidably connected to the baffle (5). The adjusting bolt (6) and the baffle (5) are concentric. A ball support (3) is threadedly connected to the upper end of the adjusting bolt (6). A spring (4) is installed between the ball support (3) and the baffle (5). A steel ball (2) is installed on the ball support (3) and is in sealing contact with the sealing cone surface.

3. The apparatus of claim 1, wherein: The baffle (5) of the upper one-way valve group is threadedly connected to the upper connector (1), and the baffle (5) of the lower one-way valve group is threadedly connected to the lower connector (8). The steel ball (2) of the upper one-way valve group is in sealing contact with the sealing cone surface in the upper connector (1), and the steel ball (2) of the lower one-way valve group is in sealing contact with the sealing cone surface in the dual-channel body (7).

4. The apparatus of claim 2, wherein: The spring (4) is sleeved on the adjusting bolt (6), with the upper end of the spring (4) tightly abutting the ball support (3) and the lower end of the spring (4) tightly abutting the baffle (5).

5. The apparatus of claim 1, wherein: The dual-channel body (7) is detachably and fixedly sealed with a lateral liquid inlet connector (9) that communicates with the radial channel (13).

6. The apparatus of claim 5, wherein: The side inlet connector (9) is fixed on the clamp (10). One end of the side inlet connector (9) is sealed and inserted into the slot on the dual-channel body (7). The clamp (10) is equipped with a fastening bolt (11), which makes the clamp (10) tighten the dual-channel body (7).

Images