A bridge-type concentric water distributor plug

Abstract

The application discloses a bridge type concentric water distributor plug, which comprises a support positioning assembly and a sealing section assembly, the support positioning assembly is arranged on the upper end of the sealing section assembly and is arranged in cooperation with the water distributor, and meanwhile, the support positioning assembly provides driving force for the sealing section assembly, the sealing section assembly is arranged in cooperation with the water injection well and is used for realizing seat sealing or unsealing under the action of the driving force. When the valve core of the bridge type concentric water distributor of the water injection well is rusted or cannot be adjusted and controlled, the plug with a selected water nozzle is sent and is seated on the concentric water distributor without well lifting and water distributor replacement, so that the control and adjustment of the water injection volume of the layer position are realized. The high operation cost caused by the water volume unadjustable replacement of the water distributor due to the water distributor damage of the separate layer water injection well is greatly saved.

Description

Technical Field

[0001] This invention belongs to the field of oilfield dynamic monitoring, and specifically relates to a blocker for a bridge-type concentric water distributor. Background Technology

[0002] In oilfield water injection production, stratified water injection enables refined water injection for water-driven oil recovery. Previously, stratified water injection primarily used eccentric water distributors. With continuous technological advancements, bridge-type concentric water distributors have become widely used in various oilfields and have achieved certain application results. However, over time, bridge-type concentric water distributors have revealed certain problems in practical applications. These problems stem from issues with water quality and the fact that the adjustable valve core of the bridge-type concentric water distributor's nozzle is an integrated design that cannot be separated from the distributor.

[0003] In long-term water injection, some bridge-type water distributors in single injection wells become unresponsive due to scaling and other issues. This results in water distribution at the formation level failing to meet requirements, and some testing processes (such as profile control) cannot be carried out normally. This necessitates well tripping to replace the water distributor, which is costly. Furthermore, wellhead depressurization is required, causing previously injected water to flow back to the surface, lowering formation pressure and impacting the well's production. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a bridge-type concentric water distributor blocker. In the case of failure of the water nozzle adjustment of the bridge-type concentric injection well water distributor in oilfield, the blocker can be thrown into the bridge-type concentric injection well water distributor to realize water distribution adjustment, thereby reducing the construction operation cost of replacing the bridge-type concentric water distributor when the well is pulled out.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a plug for a bridge-type concentric water distributor, including a support and positioning component and a sealing section component. The support and positioning component is disposed on the upper end of the sealing section component and is configured to cooperate with the water distributor, while providing driving force to the sealing section component. The sealing section component is configured to cooperate with the injection well and is used to achieve sealing or unsealing under the action of driving force.

[0006] The support and positioning assembly includes a main bracket, a positioning support arm, a support arm opening and closing clutch, a power rotating rod, and a power transmission shaft. The lower end of the power transmission shaft is connected to the upper end of the power rotating rod. The power rotating rod passes through the main bracket, the support arm opening and closing clutch, and the positioning support arm from top to bottom before connecting to the sealing section assembly. A return spring is fitted on the power transmission shaft to maintain the axial movement of the power transmission shaft in the same direction as the power rotating rod during rotation. The power rotating rod is connected to the main bracket by a trapezoidal buckle. The positioning support arm, the support arm opening and closing clutch, and the power transmission shaft are all connected by a concave-convex sliding structure. When the power transmission shaft rotates clockwise or counterclockwise, the power rotating rod rotates in the same direction and has an upward or downward axial movement.

[0007] The top of the blocker is equipped with a docking sleeve for connecting with an electric delivery tool or an electric retrieval tool.

[0008] The sealing section assembly includes a fixed sleeve, a sliding sleeve, a central sliding rod, an anti-rotation screw, an upper cup assembly, a lower cup assembly, a connecting pin, a ceramic water nozzle, and a water nozzle cap. The upper end of the central sliding rod is connected to the support and positioning assembly. The fixed sleeve is fitted over the central sliding rod, and the sliding sleeve is fitted over the fixed sleeve and connected to the central sliding rod. The upper and lower cup assemblies are fitted onto the fixed sleeve and located on the upper and lower sides of the sliding sleeve, respectively. The ceramic water nozzle is connected to the lower end of the central sliding rod. The ceramic water nozzle is fixedly connected by a water nozzle cap, which has an inlet A. The central sliding rod has an outlet B. After the sealing section assembly is seated on the water distributor, liquid can only enter the formation from the inlet A through the central hole of the ceramic water nozzle, through the central liquid passage of the central sliding rod, and to the outlet B.

[0009] The upper cup assembly includes an upper cup, an upper cup upper fixing seat, and an upper cup lower fixing seat. The lower cup assembly includes a lower cup, a lower cup upper fixing seat, and a lower cup lower fixing seat. The upper cup upper fixing seat is fastened to the fixing sleeve. The lower cup lower fixing seat is fastened to the upper side of the sliding sleeve. The lower cup upper fixing seat is attached to the outer circle of the sliding sleeve and fastened to the fixing sleeve through a connecting pin. The lower cup lower fixing seat is fastened to the sliding sleeve. The forward or reverse rotation of the power rotating rod drives the central sliding rod to move axially upward or downward, thereby causing the movable ends of the upper and lower cups to slide and compress the upper and lower cups.

[0010] A sand-proof net is installed on the outside of the water inlet A, and the sand-proof net is fixed by a sand-proof net fixing sleeve.

[0011] The central sliding rod is connected to the power rotating rod of the positioning component in the form of a monk's head hook. The central sliding rod is equipped with an anti-rotation screw. When the power rotating rod rotates, the anti-rotation screw limits the central sliding rod to radial rotation and allows it to slide axially up and down.

[0012] The central sliding rod has a blind hole structure, with a ceramic water tap fixing hole at one end. A water outlet groove is provided on the bottom outer diameter of the blind hole, and the water outlet groove is always connected to the water outlet hole between the two leather cups.

[0013] The fixing sleeve and the main support of the positioning component are connected by threaded fastening.

[0014] The beneficial effects of this invention are: when the valve core of the bridge-type concentric water distributor in a water injection well rusts or becomes uncontrollable, there is no need to raise the well to replace the water distributor. Instead, a plug with a selected water nozzle is deployed and seated on the concentric water distributor, achieving control and adjustment of the water injection volume at each stratum. This greatly saves on the high operating costs incurred in replacing damaged water distributors in stratified water injection wells. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the blocker for a bridge-type concentric water distributor according to the present invention. Detailed Implementation

[0016] The objectives, technical solutions, and advantages of this invention will become clearer and more apparent. The invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0017] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "inner," "outer," 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 device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0018] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, article, or apparatus that includes that element.

[0019] This invention provides a blocker for a bridge-type concentric water distributor, such as... Figure 1 As shown, it includes a support and positioning component 1 and a sealing section component 2. The support and positioning component 1 is disposed on the upper end of the sealing section component 2 and is configured to cooperate with the water distributor, while providing driving force to the sealing section component 2. The sealing section component 2 is configured to cooperate with the water injection well and is used to achieve sealing or unsealing under the action of driving force.

[0020] The support and positioning assembly 1 includes a main bracket 111, a positioning support arm 112, a support arm opening and closing clutch 113, a power rotating rod 114, and a power transmission shaft 115. The lower end of the power transmission shaft 115 is connected to the upper end of the power rotating rod 114. The power rotating rod 114 passes through the main bracket 111, the support arm opening and closing clutch 113, and the positioning support arm 112 from top to bottom, and then connects to the sealing section assembly 2.

[0021] Furthermore, it also includes a return spring 116, which is sleeved on the power transmission shaft 115 and is used to keep the power transmission shaft 115 moving axially in the same direction as the power rotation rod 114 during the process of the power transmission shaft 115 driving the power rotation rod 114 to rotate.

[0022] The power rotating rod 114 is connected to the main support 111 by a trapezoidal buckle, and the positioning support arm 112, the support arm opening and closing clutch 113 and the power transmission shaft 115 are all connected by a concave-convex sliding structure.

[0023] When the power transmission shaft 115 rotates clockwise or counterclockwise, the power rotating rod 114 rotates in the same direction and has an upward or downward axial movement.

[0024] The positioning support arm 112 is used for positioning when the blocker is connected to the water distributor. During the rotation of the power rotating rod 114 of the blocker, the support arm opening and closing clutch 113 will rotate. The sliding sleeve end of the support arm opening and closing clutch 113 has an elliptical structure. During the rotation, the positioning support arm 112 continuously switches between the high point and the low point of the ellipse. When switching to the high point, the positioning support arm 112 retracts, and when switching to the low point, the positioning support arm 112 opens. After the positioning support arm 112 is opened and connected to the concentric water distributor, the hanging ball of the support arm opening and closing clutch 113 disengages from the slot of the power rotating rod 114, that is, the support arm opening and closing clutch 113 disengages from the power rotating rod 114. The effect produced in this state is that the support arm opening and closing clutch 113 is always stationary during the rotation of the power rotating rod 114, so the positioning support arm 112 is always stationary.

[0025] The top of the blocker is equipped with a docking sleeve for electric delivery or electric retrieval tools.

[0026] The sealing section assembly 2 includes a fixed sleeve 211, a sliding sleeve 212, a central sliding rod 213, an anti-rotation screw 214, an upper cup assembly, a lower cup assembly, a connecting pin 221, a ceramic water nozzle 222, and a water nozzle cap 22. The upper end of the central sliding rod 213 is connected to the support and positioning assembly 1. The fixed sleeve 211 is fitted over the central sliding rod 213, and the sliding sleeve 212 is fitted over the fixed sleeve 211 and connected to the central sliding rod 213. The upper cup assembly and the lower cup assembly are respectively fitted over the fixed sleeve 211 and located on the upper and lower sides of the sliding sleeve 212. The ceramic water nozzle 222 is connected to the lower end of the central sliding rod 213. The ceramic water nozzle 222 is fixedly connected by the water nozzle cap 223, which has an inlet A, and the central sliding rod 213 has an outlet B.

[0027] The upper leather cup assembly includes an upper leather cup 215, an upper leather cup upper end fixing seat 216, and an upper leather cup lower end fixing seat 217. The lower leather cup assembly includes a lower leather cup 218, a lower leather cup upper end fixing seat 219, and a lower leather cup lower end fixing seat 220. The upper leather cup upper end fixing seat 216 is fastened to the fixing sleeve 211. The upper leather cup lower end fixing seat 217 is fastened to the upper side of the sliding sleeve 212. The lower leather cup upper end fixing seat 219 is attached to the outer circle of the sliding sleeve 212 and fastened to the fixing sleeve 211 through a connecting pin 221. The lower leather cup lower end fixing seat 220 is fastened to the sliding sleeve 212.

[0028] A sand-proof net 224 is provided on the outside of the water inlet A, and the sand-proof net 224 is fixed by a sand-proof net fixing sleeve 225.

[0029] After the sealing section assembly 2 is sealed on the water distributor, the liquid can only flow through the predetermined liquid passage, that is, from the water inlet A through the central hole of the ceramic water nozzle 222, through the central liquid passage set by the central sliding rod 213 to the water outlet B and enter the formation. By selecting ceramic water nozzles 222 with different hole diameters, the water injection volume can be controlled.

[0030] The central sliding rod 213 is connected to the power rotating rod 114 of the positioning component 1 in the form of a monk's head hook. The central sliding rod 213 is provided with an anti-rotation screw 214. When the power rotating rod 114 rotates, the anti-rotation screw 214 limits the central sliding rod 213 from radial rotation to axial up and down sliding.

[0031] The central sliding rod 213 is a blind hole structure with a ceramic water tap fixing hole at one end. A water outlet groove is provided on the bottom outer diameter of the blind hole, and this water outlet groove is always connected to the water outlet hole between the two leather cups.

[0032] After the blocker is thrown into the concentric water distributor, the screw is rotated to squeeze the leather cup. When the outer diameter of the leather cup expands by more than 47mm, the sealing is successful.

[0033] The fixing sleeve 211 and the main support 111 of the positioning component 1 are fastened together by threaded fastening.

[0034] The forward or reverse rotation of the power rotating rod 114 drives the central sliding rod 213 to move axially upward or downward, thereby causing the movable ends of the upper and lower cups 215 and 220 to slide, thereby expanding the outer diameter of the upper and lower cups (the outer diameter can be expanded up to 52mm), which is the sealing of the blocker, or restoring the outer diameter (outer diameter 42mm), which is the unsealing of the blocker.

[0035] The main working principle of the plug of the present invention is that the forward or reverse rotation of the central rotating screw drives the central sliding rod of the cup assembly to move axially upward or downward, thereby driving the movable ends of the two rubber cups on the cup assembly to slide and achieve the expansion of the outer diameter of the upper and lower cups (the maximum expansion outer diameter can reach 52mm), that is, the plug is sealed or the outer diameter is stretched back (outer diameter 42mm), that is, the plug is unsealed.

[0036] The central rotating screw and the central sliding rod of the plug are connected by a monk's head hook. The central sliding rod is equipped with an anti-rotation screw to ensure that the central sliding rod slides axially upward or downward in the cup assembly during the rotation of the central rotating screw.

[0037] The blocker is equipped with a positioning support arm and an opening / closing clutch. The positioning support arm is used for positioning when the blocker is connected to the water distributor. During the rotation of the central rotating screw of the blocker, the opening / closing clutch will rotate. The end of the sliding sleeve of the opening / closing clutch has an elliptical structure. During the rotation, the support arm continuously switches between the high point and the low point of the ellipse. When it switches to the high point, the support arm retracts; when it switches to the low point, the support arm opens. After the support arm opens and connects with the concentric water distributor, the hanging ball of the clutch disengages from the slot on the central rotating screw, that is, the clutch disengages from the central rotating screw. The effect produced in this state is that the clutch remains stationary during the rotation of the central rotating screw, so the support arm remains stationary.

[0038] The sealing section assembly mainly consists of a fixed sleeve, a sliding sleeve, a central sliding rod, an anti-rotation screw, an upper cup, an upper cup upper fixing seat, an upper cup lower fixing seat, a lower cup, a lower cup upper fixing seat, a lower cup lower fixing seat, a connecting pin, a ceramic water nozzle, a water nozzle cap, a sand screen, and a sand screen fixing sleeve. An outlet is located between the upper and lower cups in the sealing section assembly. After the concentric blocker is sealed within the concentric water distributor, water flow can only pass through the inlet on the water nozzle cap, the sand screen, the ceramic water nozzle, and the liquid passage on the central sliding rod, reaching the outlet between the upper and lower cups and flowing out into the formation. The water volume is determined by the inner diameter of the ceramic water nozzle.

[0039] The fixed sleeve and sliding sleeve are connected together using a rubber cup. The center sliding rod passes through the central hole of the fixed sleeve and connects to the sliding sleeve. The anti-rotation screw passes through the groove provided in the fixed sleeve and is installed on the center sliding rod. There are upper and lower rubber cups. The center sliding rod has a blind hole structure with a ceramic water nozzle fixing hole at one end. A water outlet groove is provided on the bottom outer diameter of the blind hole. This water outlet groove is always connected to the water outlet hole between the two rubber cups in the rubber cup assembly. After the plug is thrown into the concentric water distributor, the screw is rotated to squeeze the rubber cup. When the outer diameter of the rubber cup expands by more than 47mm, the sealing is successful.

[0040] In summary, the content of this invention is not limited to the above-described embodiments. Those skilled in the art can easily propose other embodiments within the technical guiding principles of this invention, but such embodiments are all included within the scope of this invention.

Claims

1. A blocker for a bridge-type concentric water distributor, characterized in that, It includes a support and positioning component (1) and a sealing section component (2). The support and positioning component (1) is set on the upper end of the sealing section component (2) and is configured in conjunction with the water distributor. It provides driving force to the sealing section component (2). The sealing section component (2) is configured in conjunction with the water injection well and is used to achieve sealing or unsealing under the action of driving force. The support and positioning assembly (1) is provided with a main bracket (111), a positioning support arm (112), a support arm opening and closing clutch (113), a power rotating rod (114), and a power transmission shaft (115). The lower end of the power transmission shaft (115) is connected to the upper end of the power rotating rod (114). The power rotating rod (114) passes through the main bracket (111), the support arm opening and closing clutch (113), and the positioning support arm (112) from top to bottom and is then connected to the sealing section assembly (2). A return spring (116) is sleeved on the power transmission shaft (115). Used to keep the power drive shaft (115) moving axially in the same direction as the power rotating rod (114) during the rotation of the power drive shaft (115); the power rotating rod (114) is connected to the main support (111) by a trapezoidal buckle, and the positioning support arm (112), the support arm opening and closing clutch (113) and the power drive shaft (115) are all connected by a concave and convex sliding structure. When the power drive shaft (115) rotates clockwise or counterclockwise, the power rotating rod (114) rotates in the same direction and has an upward or downward axial movement. The sealing section assembly (2) is provided with a fixed sleeve (211), a sliding sleeve (212), a central sliding rod (213), an anti-rotation screw (214), an upper cup assembly, a lower cup assembly, a connecting pin (221), a ceramic water tap (222), and a water tap cap (223). The upper end of the central sliding rod (213) is connected to the support positioning assembly (1). The fixed sleeve (211) is fitted outside the central sliding rod (213), and the sliding sleeve (212) is fitted outside the fixed sleeve (211) and connected to the central sliding rod (213). The upper cup assembly and the lower cup assembly are... The ceramic water nozzle (222) is mounted on the fixed sleeve (211) and located on the upper and lower sides of the sliding sleeve (212). The ceramic water nozzle (222) is connected to the lower end of the central sliding rod (213). The ceramic water nozzle (222) is fixedly connected by the water nozzle cap (223). The water nozzle cap (223) is provided with an inlet A. The central sliding rod (213) is provided with an outlet B. After the sealing section assembly (2) is seated on the water distributor, the liquid can only enter the formation from the inlet A through the central hole of the ceramic water nozzle (222), through the central liquid passage provided by the central sliding rod (213), and reach the outlet B. The central sliding rod (213) is connected to the power rotating rod (114) of the support positioning assembly (1) in the form of a monk's head hook. The central sliding rod (213) is provided with an anti-rotation screw (214). When the power rotating rod (114) rotates, the anti-rotation screw (214) limits the central sliding rod (213) to radial rotation and only allows it to slide axially up and down.

2. The blocker for a bridge-type concentric water distributor according to claim 1, characterized in that, The top of the blocker is equipped with a docking sleeve for connecting with an electric delivery tool or an electric retrieval tool.

3. The blocker for a bridge-type concentric water distributor according to claim 1, characterized in that, The upper leather cup assembly includes an upper leather cup (215), an upper leather cup upper end fixing seat (216), and an upper leather cup lower end fixing seat (217). The lower leather cup assembly includes a lower leather cup (218), a lower leather cup upper end fixing seat (219), and a lower leather cup lower end fixing seat (220). The upper leather cup upper end fixing seat (216) is fastened to the fixing sleeve (211), and the upper leather cup lower end fixing seat (217) is fastened to the upper side of the sliding sleeve (212). The fixed seat (219) is attached to the outer circle of the sliding sleeve (212) and is fastened to the fixed sleeve (211) through the connecting pin (221). The lower end fixed seat (220) of the lower cup is fastened to the sliding sleeve (212). The forward or reverse rotation of the power rotating rod (114) drives the central sliding rod (213) to move axially upward or downward, thereby driving the movable ends of the upper cup (215) and the lower cup (218) to slide and squeeze the upper and lower cups.

4. The blocker for a bridge-type concentric water distributor according to claim 1, characterized in that, A sand-proof net (224) is provided on the outside of the water inlet A, and the sand-proof net (224) is fixed by a sand-proof net fixing sleeve (225).

5. The blocker for a bridge-type concentric water distributor according to claim 1, characterized in that, The central sliding rod (213) is a blind hole structure with a ceramic water tap fixing hole at one end. A water outlet groove is provided on the bottom outer diameter of the blind hole, and the water outlet groove is always connected to the water outlet hole between the two leather cups.

6. The blocker for a bridge-type concentric water distributor according to claim 1, characterized in that, The fixing sleeve (211) and the main bracket (111) of the support and positioning assembly (1) are connected by threaded fastening.

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