Conversion type forward filling tool with sealing structure

Abstract

The conversion type forward filling tool with the sealing structure comprises a pressurizing pipe, a hydraulic plate and an oil pumping sleeve, a sliding groove is formed in the inner side wall of the pressurizing pipe, a plurality of flow dividing grooves communicated with a pressure attaching cavity are formed in the inner side wall of the sliding groove, a lantern ring used for blocking the flow dividing grooves is connected into the sliding groove in a sliding mode, and the hydraulic plate is connected with the oil pumping sleeve in a sliding mode. The top of the lantern ring is fixedly connected with an L-shaped ejector rod making contact with the hydraulic plate, and the bottom of the hydraulic plate is connected with an oil pumping sleeve. The utility model relates to the technical field of oilfield exploitation equipment. According to the conversion type forward filling tool with the sealing structure, by arranging a flow dividing groove, a lantern ring and an L-shaped ejector rod, the flow dividing groove can be opened when a hydraulic plate moves downwards to extrude an oil pumping sleeve, sand washing liquid can enter a pressurizing pipe through the flow dividing groove, and therefore the resistance of the sand washing liquid to the hydraulic plate is reduced when the oil pumping sleeve rebounds; and the oil pumping sleeve can be successfully rebounded.

Description

Technical Field

[0001] The utility model relates to the technical field of oilfield mining equipment, in particular to a conversion type positive filling tool with a sealing structure. Background Art

[0002] Sand control refers to the correct selection of cementing and completion methods, formulation of reasonable mining measures, control of production pressure difference, and restriction of seepage velocity to prevent sand plugging in the oil production process according to the conditions of the oil layer and oil well. Under normal mining conditions, sand production in oil wells is extremely harmful. In order to prevent sand production in oil wells, on the one hand, it is necessary to correctly select cementing and completion methods, formulate reasonable mining measures, control of production pressure difference, and restriction of seepage velocity according to the conditions of the oil layer and oil well, strengthen the management of oil wells in the sand layer, and try to avoid strong pumping and inducing flow measures; on the other hand, according to the requirements of the oil layer and mining process, adopt corresponding sand control technology to ensure the normal production of the oil well.

[0003] According to a conversion type positive filling tool with a sealing structure disclosed in Chinese patent publication number CN114075953B, the present invention discloses a conversion type positive filling tool with a sealing structure, which relates to the technical field of oilfield production equipment. The present invention includes a boosting pipe, a sealing rubber hose, a filter pipe and an oil return pipe, wherein the oil return pipe is arranged inside the boosting pipe, and a hydraulic valve plate is arranged at the lower end thereof, and extends to the inside of the filter pipe, and a hydraulic plate is arranged on the upper end surface thereof, which is mainly used as a driving device. The present invention increases the pressure inside the sand washing machine while filling the sand washing liquid to wash the sand by arranging a boosting pipe, a reflux pipe and an oil return pipe, and at the same time realizes the oil pumping in the pipeline and the flow rate control of the sand washing liquid; wherein a hydraulic valve plate and a hydraulic partition are arranged, the oil is pressed out from the bottom by using the one-way valve pipe of the hydraulic valve plate, and the oil is pumped out by using the pump oil sleeve, and in the repeated action of rebounding and compressing the pump oil sleeve, the sand washing pressure is pressed into the flushing tank by the hydraulic plate for sand washing by using the hydraulic plate, and the flushing tank with a spiral groove structure can strictly control the flow trajectory of the fluid to avoid leakage due to excessive pressure.

[0004] According to the above patent, the hydraulic pressure of the sand washing liquid is used to press down the hydraulic plate, and then a gap is created when the hydraulic plate is separated from the rail to allow the sand washing liquid to enter the washing liquid inlet for sand washing. Then, the pump oil sleeve rebounds and pumps out the oil because the hydraulic pressure of the sand washing liquid weakens. However, when the pump oil sleeve rebounds, the hydraulic plate will gradually approach the boost pipe, reducing the permeable cross-section of the sand washing liquid, thereby reducing the flow rate of the sand washing liquid and causing the sand washing liquid to exert resistance on the rebound of the pump oil sleeve. This resistance will increase as the distance between the hydraulic plate and the boost pipe decreases until the balance is maintained. The pump oil sleeve will no longer be able to continue to rebound, resulting in the pump oil sleeve being unable to pump oil. In order for the pump oil sleeve to pump oil normally, the sand washing liquid needs to be input at intervals, which increases the difficulty of using the filling tool. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a conversion type positive filling tool with a sealing structure, so as to solve the technical problems mentioned in the above background technology.

[0006] The above technical objectives of the utility model are achieved through the following technical solutions:

[0007] A conversion type forward filling tool with a sealing structure comprises a boosting pipe, a hydraulic plate and an oil pump sleeve, wherein the inner side wall of the boosting pipe is provided with a slide groove, the inner side wall of the slide groove is provided with a plurality of diversion grooves connected with an auxiliary pressure chamber, a sleeve for blocking the diversion groove is slidably connected in the slide groove, the top of the sleeve is fixedly connected with an L-shaped push rod in contact with the hydraulic plate, and the bottom of the hydraulic plate is connected with the oil pump sleeve.

[0008] Furthermore, the height of the diverter groove is smaller than the height of the collar, so that when the collar slides to the top of the slide groove, the collar blocks the diverter groove.

[0009] Furthermore, a top protrusion of the inner side wall of the boost pipe is formed with a limiting portion that fits with the hydraulic plate, so that a step is formed at the top of the boost pipe.

[0010] Furthermore, a guide rail for assisting the movement of the hydraulic plate is fixedly connected to the inner side wall of the limiting portion, and the bottom of the guide rail extends out of the limiting portion and into the interior of the boost pipe.

[0011] Furthermore, the outer diameter of the oil pump sleeve is smaller than the outer diameter of the hydraulic plate, so that a gap for avoiding the L-shaped push rod is left between the oil pump sleeve and the hydraulic plate.

[0012] Furthermore, a push plate is fixedly connected to the outer side wall of the oil pump sleeve, and the top of the push plate contacts the corner of the L-shaped push rod.

[0013] In summary, the present invention includes at least one of the following beneficial technical effects:

[0014] 1. This conversion type positive filling tool with a sealing structure can open the diverter groove when the hydraulic plate moves down to squeeze the pump oil sleeve through the diverter groove, the collar and the L-shaped push rod, so that the sand washing liquid can enter the booster pipe through the diverter groove, thereby reducing the resistance of the sand washing liquid to the hydraulic plate when the pump oil sleeve rebounds, allowing the pump oil sleeve to rebound successfully, and after rebounding, pressure is applied to the hydraulic plate again to press the pump oil sleeve downward to deform, so as to ensure continuous and stable pumping of the pump oil sleeve;

[0015] 2. This conversion type positive filling tool with a sealing structure can push the ring upward to block the diverter groove when the pump sleeve is reset through the push plate, so that the pump sleeve can pump oil stably and continuously, improving the practicality of the filling tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 The utility model is a structural schematic diagram of a conversion type positive filling tool with a sealing structure.

[0018] Figure 2 The utility model is a schematic diagram of the internal structure of a conversion type positive filling tool with a sealing structure.

[0019] Figure 3 The utility model is a structural schematic diagram of a conversion type positive filling tool with a sealing structure for sand washing liquid to enter a booster pipe.

[0020] In the figure, 1, boost pipe; 2, hydraulic plate; 3, pump oil sleeve; 4, slide groove; 5, diverter groove; 6, collar; 7, L-shaped push rod; 8, limit part; 9, guide rail; 10, push plate. DETAILED DESCRIPTION

[0021] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0022] Example:

[0023] Reference Figure 1 - Figure 3 The utility model discloses a conversion type positive filling tool with a sealing structure, including a boosting pipe 1, a hydraulic plate 2 and an oil pump sleeve 3. The inner wall of the boosting pipe 1 is provided with a slide groove 4, and the inner wall of the slide groove 4 is provided with a plurality of diversion grooves 5 connected with the auxiliary pressure chamber. A sleeve 6 for blocking the diversion groove 5 is slidably connected in the slide groove 4, and an L-shaped push rod 7 in contact with the hydraulic plate 2 is fixedly connected to the top of the sleeve 6, and the bottom of the hydraulic plate 2 is connected to the oil pump sleeve 3.

[0024] In this embodiment, after the sand washing liquid enters the boosting pipe 1, the hydraulic pressure of the sand washing liquid is used to push the hydraulic plate 2 downward. Then, after the hydraulic plate 2 moves down to below the limit portion 8, a gap is generated between the hydraulic plate 2 and the boosting pipe 1. Then, the sand washing liquid enters the boosting pipe 1 through the gap to perform sand washing.

[0025] During the downward movement of the hydraulic plate 2, the hydraulic plate 2 will squeeze the L-shaped push rod 7, so that the L-shaped push rod 7 pushes the ring 6 to move downward in the slide groove 4, so that the ring 6 is away from the diverter groove 5 to open the diverter groove 5, and then the sand washing liquid can enter the booster pipe 1 through the gap between the hydraulic plate 2 and the limiting part 8 and the diverter groove 5.

[0026] When the sand washing liquid enters the boosting pipe 1, the hydraulic plate 2 is pressurized by the sand washing liquid, and the pump sleeve 3 rebounds at this time, pushing the hydraulic plate 2 to move up and start pumping oil. When the pump sleeve 3 rebounds, the hydraulic plate 2 gradually approaches the limit part 8, so that the gap between the hydraulic plate 2 and the limit part 8 is reduced, resulting in a slowdown in the speed of the sand washing liquid passing through the gap, and the diverter slot 5 is not blocked, so the sand washing liquid can continue to enter the boosting pipe 1 through the diverter slot 5, so the hydraulic plate 2 can be reset normally.

[0027] When the hydraulic plate 2 is reset, the push plate 10 arranged on the oil pump sleeve 3 contacts the corner of the L-shaped push rod 7, and then the collar 6 is reset under the push of the oil pump sleeve 3. As the collar 6 is reset, the collar 6 will gradually block the diverter groove 5, so that the sand washing liquid cannot enter the booster pipe 1 through the diverter groove 5, so that the sand washing liquid can re-pressurize the hydraulic plate 2, so that the hydraulic plate 2 moves down again to squeeze the oil pump sleeve 3, so that the oil pump sleeve 3 can continuously pump oil.

[0028] Among them, the above-mentioned boost pipe 1, hydraulic plate 2 and pump oil sleeve 3 are the same as the boost pipe 1, hydraulic plate 401 and pump oil sleeve 402 in a conversion type forward filling tool with a sealing structure disclosed in Chinese patent publication No. CN114075953B, and the remaining structures have not been improved, so they will not be described in detail.

[0029] In a further preferred embodiment of the present invention, Figure 2 As shown, the height of the diverter groove 5 is smaller than the height of the collar 6 , so that when the collar 6 slides to the top of the slide groove 4 , the collar 6 blocks the diverter groove 5 .

[0030] In this embodiment, by making the ring 6 slide to the top of the slide groove 4 to block the diverter groove 5, the sand washing liquid can re-apply pressure to the hydraulic plate 2, so that the hydraulic plate 2 slides down in the booster pipe 1 to squeeze the pump oil sleeve 3, so that the pump oil sleeve 3 can continuously pump oil, thereby improving the pumping efficiency of the pump oil sleeve 3.

[0031] In a further preferred embodiment of the present invention, Figure 2 As shown, the top of the inner wall of the boost pipe 1 is convexly formed with a limiting portion 8 that fits with the hydraulic plate 2, so that the top of the boost pipe 1 forms a step.

[0032] In this embodiment, the limit portion 8 is provided to reduce the gap between the boost pipe 1 and the hydraulic plate 2, so that when the sand washing liquid applies pressure to the hydraulic plate 2, the hydraulic plate 2 moves downward, thereby squeezing the pump oil sleeve 3.

[0033] In a further preferred embodiment of the present invention, Figure 2 and Figure 3 As shown, the inner side wall of the limiting portion 8 is fixedly connected with a guide rail 9 for assisting the movement of the hydraulic plate 2 , and the bottom of the guide rail 9 extends out of the limiting portion 8 and into the interior of the boost pipe 1 .

[0034] In this embodiment, because the sand washing liquid needs to enter the inside of the boosting pipe 1, the hydraulic plate 2 needs to be pushed below the limiting portion 8 to create a gap between the hydraulic plate 2 and the limiting portion 8 for the sand washing liquid to pass through. The limiting portion 8 is provided with a guide rail 9 for assisting the hydraulic plate 2 to move downward, which will cause the hydraulic plate 2 to be unable to fit with the guide rail 9 due to offset when it moves upward and resets, causing the hydraulic plate 2 to be stuck and unable to reset.

[0035] Therefore, the bottom of the guide rail 9 is extended downward, and the hydraulic plate 2 will not be separated from the guide rail by lengthening the guide rail 9, which can effectively improve the movement stability of the hydraulic plate 2.

[0036] In a further preferred embodiment of the present invention, Figure 3 As shown, the outer diameter of the oil pump sleeve 3 is smaller than the outer diameter of the hydraulic plate 2 , so that a gap is left between the oil pump sleeve 3 and the hydraulic plate 2 for avoiding the L-shaped push rod 7 .

[0037] In this embodiment, by leaving a gap between the pump oil sleeve 3 and the hydraulic plate 2 for avoiding the L-shaped push rod 7, the L-shaped push rod 7 can maintain stable contact with the hydraulic plate 2, so that when the hydraulic plate 2 moves downward, the L-shaped push rod 7 can be stably pushed downward with the ring 6 to open the diversion groove 5.

[0038] In a further preferred embodiment of the present invention, Figure 3 As shown, a push plate 10 is fixedly connected to the outer side wall of the oil pump sleeve 3 , and the top of the push plate 10 contacts the corner of the L-shaped push rod 7 .

[0039] In this embodiment, by setting the push plate 10, the push plate 10 can be pushed to reset when the pump oil sleeve 3 rebounds, so that the push plate 10 can be used to push the L-shaped push rod 7 to move upward, so that the ring 6 is reset to block the diverter groove 5, and the sand washing liquid can re-apply pressure to the hydraulic plate 2, so that the pump oil sleeve 3 can stably and continuously pump oil.

[0040] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A conversion type positive filling tool with a sealing structure, comprising a booster pipe (1), a hydraulic plate (2) and a pump oil sleeve (3), characterized in that: The inner wall of the boost pipe (1) is provided with a slide groove (4), and the inner wall of the slide groove (4) is provided with a plurality of diversion grooves (5) connected with the auxiliary pressure chamber. A sleeve (6) for blocking the diversion groove (5) is slidably connected in the slide groove (4), and an L-shaped push rod (7) in contact with the hydraulic plate (2) is fixedly connected to the top of the sleeve (6), and the bottom of the hydraulic plate (2) is connected with a pump oil sleeve (3).

2. A conversion type positive filling tool with a sealing structure according to claim 1, characterized in that: The height of the diverter groove (5) is smaller than the height of the collar (6), so that when the collar (6) slides to the top of the slide groove (4), the collar (6) blocks the diverter groove (5).

3. A conversion type positive filling tool with a sealing structure according to claim 1, characterized in that: The top of the inner wall of the boosting pipe (1) is convexly formed with a limiting portion (8) that fits with the hydraulic plate (2), so that the top of the boosting pipe (1) forms a step.

4. A conversion type positive filling tool with a sealing structure according to claim 3, characterized in that: The inner side wall of the limiting portion (8) is fixedly connected with a guide rail (9) for assisting the movement of the hydraulic plate (2), and the bottom of the guide rail (9) extends out of the limiting portion (8) and into the interior of the boost pipe (1).

5. The conversion type positive filling tool with a sealing structure according to claim 1, characterized in that: The outer diameter of the oil pump sleeve (3) is smaller than the outer diameter of the hydraulic plate (2), so that a gap for avoiding the L-shaped push rod (7) is left between the oil pump sleeve (3) and the hydraulic plate (2).

6. The conversion type positive filling tool with a sealing structure according to claim 1, characterized in that: A push plate (10) is fixedly connected to the outer side wall of the oil pump sleeve (3), and the top of the push plate (10) contacts the corner of the L-shaped push rod (7).

Images