Self-locking type liquid level tester quick connecting device

Abstract

The invention relates to the technical field of oil field oil well working fluid level testing, and discloses a self-locking type liquid level tester quick connecting device which comprises a pipeline, a connecting flange is fixedly connected to the top of the pipeline, a connecting mechanism is installed at the top of the connecting flange, and a liquid level tester is installed at the top of the connecting mechanism; and the connecting mechanism comprises a connecting shell, four mounting blocks distributed at equal intervals are fixedly connected to the lower portion of the outer side of the connecting shell, movable blocks are rotationally connected to the outer sides of the mounting blocks, fixing claws are fixedly connected to the sides, away from the connecting shell, of the movable blocks, and a sealing ring is fixedly connected to the bottom end of the connecting shell. According to the quick connecting device for the self-locking liquid level tester, the connecting flange, the connecting shell, the mounting block, the movable block, the fixed claw and the limiting outer sleeve are matched, so that the liquid level tester can be conveniently connected with a sleeve gate of an oil pipe through the quick connecting device for the self-locking liquid level tester, the device can be mounted and dismounted by a single person, and the investment of labor force is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of dynamic liquid level testing of oil fields and oil wells, in particular to a self-locking liquid level tester quick connection device. Background Art

[0002] At present, during the exploitation of oil wells, it is usually necessary to measure the liquid level of the oil wells regularly. The liquid level tester and the casing gate are fixed by using threaded connection or clamp connection. The liquid level tester is firmly fastened to the casing gate by such connection devices as clamp or thread, so that the liquid level tester can measure the oil level in the oil well.

[0003] The existing threaded connection or clamp connection method requires the cooperation of two people, using tools such as pipe pliers or socket wrenches. During operation, one person holds the liquid level tester and aligns it with the casing gate, and the other person installs the clamp and tightens the bolts with a socket wrench. The test operation can only be started after the installation is completed. After the test is completed, the two people cooperate to remove the clamp and the liquid level tester, which is time-consuming, labor-intensive and inefficient. For this reason, the present invention proposes a self-locking liquid level tester quick connection device. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a self-locking liquid level tester quick connection device, which solves the problem that the connection device requires two people to assist in installing and disassembling the liquid level tester, which is time-consuming, labor-intensive and inefficient.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a self-locking liquid level tester quick connection device, comprising a pipeline, a connecting flange is fixedly connected to the top of the pipeline, a connecting mechanism is installed on the top of the connecting flange, and a liquid level tester is installed on the top of the connecting mechanism;

[0006] The connecting mechanism includes a connecting shell, four equidistantly distributed mounting blocks are fixedly connected to the lower outer side of the connecting shell, a movable block is rotatably connected to the outer side of the mounting block, a fixing claw is fixedly connected to the side of the movable block away from the connecting shell, a sealing ring is fixedly connected to the bottom end of the connecting shell, four equidistantly distributed stoppers are fixedly connected to the top of the sealing ring, and a limited position sleeve is threadedly connected to the middle part of the outer side of the connecting shell.

[0007] Preferably, the bottom of the liquid level tester is threadedly connected to the inside of the connecting shell, and the inner sides of the four fixing claws are engaged with the outer side of the connecting flange.

[0008] Preferably, one side of the four fixing claws away from the connecting shell is in contact with the inner side of the limiting sleeve, and the inner side of the stopper is fixedly connected to the bottom of the outer periphery of the connecting shell.

[0009] Preferably, the bottom of the sealing ring and the top of the connecting flange are in contact with each other, and the stopper is arranged between the connecting shell and the fixing claw.

[0010] Preferably, the fixing claw has an L-shape, a C-shape, a V-shape or an S-shape.

[0011] Preferably, two handles are fixedly connected to the outside of the limiting sleeve, and the outside of the handles are covered with insulating rubber.

[0012] A method for using a self-locking liquid level tester quick connection device comprises the following steps:

[0013] Step 1: When using the device to measure the liquid level of an oil well, first assemble and align the liquid level tester and the connection housing, and then proceed with the subsequent installation after arriving at the test site;

[0014] Step 2: After arriving at the test site, first align the level tester with the casing gate inside the connecting flange, then open the four fixing claws on the outside of the connecting shell and buckle them on the outside of the connecting flange at the top of the pipe;

[0015] Step 3: The worker turns the handle to drive the limit sleeve to rotate on the outside of the connecting shell. At this time, the limit sleeve will rotate and move downward until the limit sleeve inserts the fixing claw buckled on the outside of the connecting flange into the inside of the limit sleeve, and the fixing claw is restricted and fixed inside the limit sleeve. Then, the liquid level tester is fixed on the casing gate, which is convenient for the liquid level tester to measure the liquid level.

[0016] Step 4. After the test is completed, the worker only needs to twist the limit sleeve in the opposite direction to drive it to rotate, and then the limit sleeve will slowly move upward along the outside of the connecting shell. At the same time, the limit sleeve and the fixed claws will slowly separate, and then the fixed claws will be out of the limit locking state. Then the worker can move the four fixed claws and the connecting flange apart, remove the liquid level tester from the casing gate in the pipeline, and measure the liquid level of the next oil well.

[0017] Preferably, the assembly method of the liquid level tester and the connecting shell in step one is a threaded tightening method, and the liquid level tester is conveniently and quickly connected and fixed to the connecting mechanism through the cooperation of the external thread distributed on the outside of the liquid level tester and the internal thread distributed on the inside of the connecting shell.

[0018] Preferably, the four fixing claws in the step 2 are clamped around the edge of the connecting flange by the action of gravity. When placing, it is only necessary to cooperate with the arc slope set at the bottom of the fixing claws and the top of the connecting flange, so that the four fixing claws can be easily opened and dropped by the downward pressure, and then buckled on the outside of the connecting flange.

[0019] Preferably, when the fixing claw in the step three is L-shaped, the liquid level tester is fixed on the casing gate in the pipeline by engaging the structure of the L-shaped end and the outer side and bottom of the connecting flange; when the fixing claw is V-shaped, the bottom and the outer side of the connecting flange are engaged and fixed by the oblique portion of the V-shaped bottom; when the fixing claw is C-shaped, the outer side of the connecting flange is engaged and fixed by the notch portion of the C-shaped bottom; when the fixing claw is S-shaped, the outer side and the bottom of the connecting flange are engaged and fixed by the notch portion on one side of the S-shaped bottom.

[0020] The present invention provides a self-locking liquid level tester quick connection device. It has the following beneficial effects:

[0021] 1. The invention enables the self-locking liquid level tester quick connection device to conveniently connect the liquid level tester and the casing gate of the oil pipe through the cooperation of the connecting flange, the connecting shell, the mounting block, the movable block, the fixing claw and the limiting sleeve, so that the device can be installed and disassembled by a single person, thereby reducing the labor input.

[0022] 2. When connecting the liquid level tester and the flange on the casing gate, the present invention can use gravity and the action of four fixing claws to achieve rapid connection and separation between the fixing claws and the connecting flange, thereby realizing that the self-locking liquid level tester quick connection device can be conveniently disassembled and assembled with the connecting flange on the casing gate, thereby improving the working efficiency of the device.

[0023] 3. The present invention replaces the traditional threaded connection structure with four fixing claws and a connecting shell, so that the device can perform oil pipe testing with higher intensity pressure, avoid the problem of damage or reduced connection stability caused by wear between threads and high pressure during use of the threaded connection structure, and improve the service life of the connection device.

[0024] 4. The present invention improves the diversity and adaptability of the device by selecting fixed claws of different shapes and connecting flanges of the casing gate for adaptation according to the model of the casing gate predetermined during the construction of the oil well, and can adapt to most oil well liquid level testing work. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A perspective view of the present invention;

[0026] Figure 2 It is a schematic diagram of the internal structure of the limiting outer sleeve of the present invention;

[0027] Figure 3 It is a schematic diagram of the V-shaped fixing claw structure of the present invention;

[0028] Figure 4 This is a schematic diagram of the C-shaped fixing claw structure of the present invention;

[0029] Figure 5It is a schematic diagram of the S-shaped fixing claw structure of the present invention.

[0030] Among them, 1. pipeline; 2. connecting flange; 3. connecting mechanism; 301. connecting shell; 302. mounting block; 303. movable block; 304. fixing claw; 305. sealing ring; 306. stopper; 307. limiting sleeve; 308. handle; 4. liquid level tester. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings of the present invention specification to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Example:

[0033] Please see attached Figure 1 -Attached Figure 5 The embodiment of the present invention provides a self-locking liquid level tester quick connection device, including a pipeline 1. The pipeline 1 is connected to the oil well pipeline, which is convenient for installing the casing gate and also convenient for testing the height of the liquid level in the oil well pipeline. A connecting flange 2 is fixedly connected to the top of the pipeline 1. The connecting flange 2 can be easily engaged with the connecting mechanism 3, and then the liquid level tester 4 and the connecting flange 2 are connected and fixed through the connecting mechanism 3. A connecting mechanism 3 is installed on the top of the connecting flange 2, and the liquid level tester 4 is quickly installed through the connecting mechanism 3, and the liquid level tester 4 and the connecting flange 2 are quickly connected. A liquid level tester 4 is installed on the top of the connecting mechanism 3, and the liquid level in the oil well is measured by the liquid level tester 4;

[0034] The connection mechanism 3 includes a connection shell 301, and four equidistantly distributed mounting blocks 302 are fixedly connected to the lower outer side of the connection shell 301, and a movable block 303 is rotatably connected to the outer side of the mounting block 302. A fixed claw 304 is fixedly connected to the side of the movable block 303 away from the connection shell 301. In the initial state of the device, the four fixed claws 304 can swing and open through the mounting block 302 and the movable block 303, and among the four mounting blocks 302, when the mounting block 302 is in a V-shape or an L-shape, an oblique groove is opened at the bottom of the fixed claw 304, and the oblique groove The opening is gradually tilted upward toward the direction of the connecting shell 301, the liquid level tester 4 is aligned with the casing gate inside the connecting flange 2, and then the four fixing claws 304 on the outside of the connecting shell 301 are opened and buckled on the outside of the connecting flange 2 at the top of the pipeline 1. The four fixing claws 304 are surrounded and stuck on the edge of the connecting flange 2 by the action of gravity. When placing, it is only necessary to use the arc slope set at the bottom of the fixing claws 304 and the top of the connecting flange 2 to easily open and fall the four fixing claws 304 through the downward pressure, and then buckle on the outside of the connecting flange 2. At the same time, an oblique groove is also provided on the upper side of the L-shaped fixing claw 304. When disassembling the connecting device, it is only necessary to lift the device upward with force, and the four fixing claws 304 can be quickly stretched and moved upward to disengage from the connecting flange 2 through the cooperation of their own or additional oblique grooves and the connecting flange 2. A sealing ring 305 is fixedly connected to the bottom end of the connecting shell 301, and four equidistantly distributed stoppers 306 are fixedly connected to the top of the sealing ring 305. One side of the stopper 306 can provide support for the inner side of the fixing claw 304 to prevent the fixing claw 304 from being unable to maintain a stable engagement with the connecting flange 2 after the limiting fixation. Through the joint action of the stopper 306 and the limiting sleeve 307, the fixing claw 304 is pressed against the inner side of the device to prevent the fixing claw 304 from shaking after the limiting fastening. At the same time, the stopper 306 can also limit the range of movement of the fixing claw 304, so that the bottom of the fixing claw 304 is at the top edge of the connecting flange 2. When in contact, the oblique notch at the bottom of the fixing claw 304 will be in an inclined state with the top of the fixing claw 304, so that when the device is pressed downward, the four fixing claws 304 can be opened and buckled on the outside of the connecting flange 2, and the middle part of the outer side of the connecting shell 301 is threadedly connected to the limiting sleeve 307. The worker turns the handle 308 to drive the limiting sleeve 307 to rotate on the outside of the connecting shell 301. At this time, the limiting sleeve 307 will rotate and move downward until the limiting sleeve 307 inserts the fixing claw 304 buckled on the outside of the connecting flange 2 into the inside of the limiting sleeve 307, and restricts and fixes the fixing claw 304 inside the limiting sleeve 307, and then fixes the liquid level tester 4 on the casing gate. At this time, the sealing ring 305 is in close contact with the top of the connecting flange 2, so that the inside of the device is sealed to avoid leakage or leakage when measuring the liquid level in the oil well, which is convenient for the liquid level tester 4 to measure the liquid level.

[0035] The bottom of the liquid level tester 4 is threadedly connected to the inside of the connecting shell 301, so that the liquid level tester 4 and the connecting device can be detachably assembled, so that the liquid level tester 4 can be removed from the connecting device separately when idle, and the inner side of the four fixing claws 304 and the outer side of the connecting flange 2 are engaged with each other, and the fixing claws 304 and the connecting flange 2 are fixed by the engagement between the fixing claws 304 and the connecting flange 2, and the fixing claws 304 are limited by the limiting sleeve 307, so that the four fixing claws 304 can be tightly fixed on the outer side of the connecting flange 2, and then the liquid level tester 4 and the casing gate in the pipeline 1 are aligned and installed, so as to facilitate the measurement of the liquid level in the oil pipe.

[0036] The four fixing claws 304 are fitted with the inner side of the limiting sleeve 307 on one side away from the connecting shell 301, and the four fixing claws 304 are limited between the limiting sleeve 307 and the stopper 306 by the limiting sleeve 307, and then the four fixing claws 304 are limited and fixed, so that the connecting device can be stably engaged and fixed with the connecting flange 2, and the inner side of the stopper 306 is fixedly connected to the outer bottom of the connecting shell 301, so that the stopper 306 does not cause pressure on the sealing ring 305, and at the same time can support the sealing ring 305 after the casing gate of the device and the oil pipe is connected, to ensure the contact tightness between the sealing ring 305 and the connecting flange 2.

[0037] The bottom of the sealing ring 305 fits with the top of the connecting flange 2. Through the cooperation between the sealing ring 305 and the connecting flange 2, a sealed environment is formed between the connecting mechanism 3 and the pipeline 1 to prevent the crude oil in the oil well from leaking. The stopper 306 is arranged between the connecting shell 301 and the fixing claw 304, so that the stopper 306 can cooperate with the limiting sleeve 307 to limit and fix the fixing claw 304, thereby allowing the four fixing claws 304 to remain in a retracted state and then tightly snap-fit ​​and fix on the outside of the connecting flange 2 to achieve non-direct contact locking between the device and the connecting flange 2. When the device is subjected to the gas pressure in the oil well, the connecting mechanism 3 can bear the force through the four fixing claws 304, thereby preventing the threaded structure of the device from directly bearing the pressure from the inside of the oil pipe. Therefore, compared with the traditional connecting device, the threaded structure on the connecting mechanism 3 will not be damaged prematurely, and the pressure is borne by the four fixing claws 304, so that the connecting mechanism 3 can adapt to the oil pipe testing work with higher pressure intensity and greatly extend the service life of the device.

[0038] The shape of the fixed claw 304 is any one of L-type, C-type, V-type or S-type, but is not limited to these shapes. According to the model of the casing gate predetermined during the construction of the oil well, the fixed claw 304 of different shapes and the connecting flange 2 on the casing gate can be selected for engagement, thereby improving the diversity and adaptability of the device and being able to adapt to most oil well liquid level testing work.

[0039] Two handles 308 are fixedly connected to the outside of the limiting sleeve 307. The outside of the handles 308 are covered with insulating rubber. The limiting sleeve 307 can be conveniently rotated and moved through the handles 308, so as to realize the connection and disassembly of the device. At the same time, the handles 308 are wrapped with insulating rubber material, which will not scratch the hands during high-intensity testing work and can prevent the interference of static electricity on the connection device to a certain extent.

[0040] A method for using a self-locking liquid level tester quick connection device comprises the following steps:

[0041] Step 1: When using the device to measure the liquid level of an oil well, first assemble and align the liquid level tester 4 and the connecting housing 301, and then perform subsequent installation after arriving at the test site;

[0042] Step 2: After arriving at the test site, first align the liquid level tester 4 with the casing gate inside the connecting flange 2, and then open the four fixing claws 304 on the outside of the connecting shell 301 and buckle them on the outside of the connecting flange 2 at the top of the pipeline 1;

[0043] Step 3: The worker turns the handle 308 to drive the limiting sleeve 307 to rotate on the outside of the connecting shell 301. At this time, the limiting sleeve 307 will rotate and move downward until the limiting sleeve 307 inserts the fixing claw 304 buckled on the outside of the connecting flange 2 into the inside of the limiting sleeve 307, and restricts and fixes the fixing claw 304 inside the limiting sleeve 307, and then fixes the liquid level tester 4 on the casing gate, so that the liquid level tester 4 can measure the liquid level.

[0044] Step 4. After the test is completed, the worker only needs to reversely twist 309 to drive the limiting sleeve 307 to rotate, and then the limiting sleeve 307 will slowly move upward along the outside of the connecting shell 301. At the same time, the limiting sleeve 307 and the fixing claws 304 will slowly separate, so that the fixing claws 304 will be out of the limit locking state. Then the worker can move the four fixing claws 304 and the connecting flange 2 apart, remove the liquid level tester 4 from the casing gate in the pipeline 1, and measure the liquid level of the next oil well.

[0045] The assembly method of the liquid level tester 4 and the connecting shell 301 in step one is a threaded tightening method. The liquid level tester 4 is conveniently and quickly connected and fixed to the connecting mechanism 3 through the cooperation of the external thread distributed on the outside of the liquid level tester 4 and the internal thread distributed on the inside of the connecting shell 301.

[0046] The four fixing claws 304 in step 2 are clamped around the edge of the connecting flange 2 by gravity. When placing, it is only necessary to use the arc slope set at the bottom of the fixing claws 304 to cooperate with the top of the connecting flange 2, so that the four fixing claws 304 can be easily opened and dropped by the downward pressure, and then buckled on the outside of the connecting flange 2.

[0047] When the fixing claw 304 in step three is L-shaped, the liquid level tester 4 is fixed on the casing gate in the pipeline 1 through the structure of the L-shaped end and the outer side and bottom of the connecting flange 2. When the fixing claw 304 is V-shaped, the bottom and the outer side of the connecting flange 2 are clamped and fixed through the oblique part of the V-shaped bottom. When the fixing claw 304 is C-shaped, the outer side of the connecting flange 2 is clamped and fixed through the notch part of the C-shaped bottom. When the fixing claw 304 is S-shaped, the outer side and the bottom of the connecting flange 2 are clamped and fixed through the notch part on one side of the S-shaped bottom.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-locking liquid level tester quick connection device, comprising a pipeline (1), characterized in that: A connecting flange (2) is fixedly connected to the top of the pipeline (1), a connecting mechanism (3) is installed on the top of the connecting flange (2), and a liquid level tester (4) is installed on the top of the connecting mechanism (3); The connection mechanism (3) comprises a connection shell (301), four equidistantly distributed mounting blocks (302) are fixedly connected to the lower outer portion of the connection shell (301), a movable block (303) is rotatably connected to the outer side of the mounting block (302), a fixed claw (304) is fixedly connected to the side of the movable block (303) away from the connection shell (301), a sealing ring (305) is fixedly connected to the bottom end of the connection shell (301), four equidistantly distributed stoppers (306) are fixedly connected to the top of the sealing ring (305), and a limiting sleeve (307) is threadedly connected to the middle outer portion of the connection shell (301).

2. A self-locking liquid level tester quick connection device according to claim 1, characterized in that: The bottom of the liquid level tester (4) is threadedly connected to the inside of the connecting shell (301), and is engaged between the inner sides of the four fixing claws (304) and the outer side of the connecting flange (2).

3. A self-locking liquid level tester quick connection device according to claim 1, characterized in that: The four fixing claws (304) are in contact with the inner side of the limiting sleeve (307) at a side away from the connecting shell (301), and the inner side of the stopper (306) is fixedly connected to the outer bottom of the connecting shell (301).

4. A self-locking liquid level tester quick connection device according to claim 1, characterized in that: The bottom of the sealing ring (305) and the top of the connecting flange (2) are in contact with each other, and the stopper (306) is arranged between the connecting shell (301) and the fixing claw (304).

5. A self-locking liquid level tester quick connection device according to claim 1, characterized in that: The shape of the fixing claw (304) is any one of L-shape, C-shape, V-shape or S-shape.

6. A self-locking liquid level tester quick connection device according to claim 1, characterized in that: Two handles (308) are fixedly connected to the outer side of the limiting sleeve (307), and the outer side of the handles (308) is covered with insulating rubber.

7. A method for using a self-locking liquid level tester quick connection device, characterized in that: A self-locking liquid level tester quick connection device according to any one of claims 1 to 6, comprising the following steps: Step 1: When using the device to measure the liquid level of an oil well, first assemble and align the liquid level tester (4) and the connecting housing (301), and then perform subsequent installation after arriving at the test site; Step 2: After arriving at the test site, first align the liquid level tester (4) with the casing gate inside the connecting flange (2), and then open the four fixing claws (304) on the outside of the connecting shell (301) and buckle them on the outside of the connecting flange (2) at the top of the pipeline (1); Step 3: The worker then turns the handle (308) to drive the limiting sleeve (307) to rotate on the outside of the connecting shell (301). At this time, the limiting sleeve (307) will rotate and move downward until the limiting sleeve (307) inserts the fixing claw (304) buckled on the outside of the connecting flange (2) into the inside of the limiting sleeve (307), and the fixing claw (304) is restricted and fixed inside the limiting sleeve (307). Then, the liquid level tester (4) is fixed on the casing gate, so that the liquid level tester (4) can measure the liquid level conveniently. Step 4. After the test is completed, the worker only needs to reversely twist (309) to drive the limit sleeve (307) to rotate, and then the limit sleeve (307) will slowly move upward along the outside of the connecting shell (301). At the same time, the limit sleeve (307) and the fixed claw (304) will also slowly separate, so that the fixed claw (304) will be out of the limit locking state. Then the worker can move the four fixed claws (304) and the connecting flange (2) apart, remove the liquid level tester (4) from the casing gate in the pipeline (1), and measure the liquid level of the next oil well.

8. The method for using the self-locking liquid level tester quick connection device according to claim 7, characterized in that: The assembly method of the liquid level tester (4) and the connecting shell (301) in step 1 is a threaded tightening method, and the liquid level tester (4) is conveniently and quickly connected and fixed to the connecting mechanism (3) by matching the external threads distributed on the outside of the liquid level tester (4) and the internal threads distributed on the inside of the connecting shell (301).

9. The method for using the self-locking liquid level tester quick connection device according to claim 7, characterized in that: The four fixing claws (304) in step 2 are clamped around the edge of the connecting flange (2) by the action of gravity. When placing, the four fixing claws (304) can be easily opened and dropped by the downward pressure, and then buckled on the outside of the connecting flange (2) by matching the arc slope set at the bottom of the fixing claws (304) with the top of the connecting flange (2).

10. The method for using the self-locking liquid level tester quick connection device according to claim 7, characterized in that: When the fixing claw (304) in step 3 is L-shaped, the liquid level tester (4) is fixed to the casing gate in the pipeline (1) by engaging the structure of the L-shaped end with the outer side and the bottom of the connecting flange (2); when the fixing claw (304) is V-shaped, the bottom and the outer side of the connecting flange (2) are engaged and fixed by the oblique part of the bottom of the V-shape; when the fixing claw (304) is C-shaped, the outer side of the connecting flange (2) is engaged and fixed by the notch part of the C-shape; when the fixing claw (304) is S-shaped, the outer side and the bottom of the connecting flange (2) are engaged and fixed by the notch part on one side of the S-shaped bottom.

Images