Water-encountering packing control device for wellhead sealing

Abstract

The invention discloses a water-encountering packing control device for wellhead sealing, and relates to the technical field of well sealing, the water-encountering packing control device comprises a rubber sleeve, a central pipe and a slip which are arranged on a packer body, the front end of the packer body is detachably connected with a fixed pipe through a mounting mechanism, and the bottom of the fixed pipe is fixedly connected with a mounting cover; a rotating disc is rotationally connected into the mounting cover through a rotating mechanism, and a plurality of sampling grooves are formed in the top of the rotating disc and penetrate through the bottom of the rotating disc. According to the water-encountering packing control device for wellhead sealing, sampling is carried out through the sampling groove in the rotating disc, standing and detection are carried out in the rotating process of the rotating disc, the detection accuracy can be improved, meanwhile, impact abrasion of crude oil to the water content sensor can be avoided, the detection effect and the service life of the water content sensor are guaranteed, and in addition, the water-encountering packing control device is suitable for popularization and application. When encountering water, intelligent control sealing of a well mouth can be achieved, and safety and reliability are achieved.

Description

Technical Field

[0001] This invention relates to the field of well sealing technology, specifically to a water-contaminated sealing control device for wellhead sealing. Background Technology

[0002] Currently, downhole packer tools are undergoing a transformation towards high-end and intelligent technologies. Upgrading water-contaminated packer control devices to meet the core characteristics of intelligent manufacturing equipment, and making them control systems within the intelligent manufacturing equipment industry, enables remote ground control of packer setting and unsealing. It can monitor key data such as pressure and temperature at various downhole layers in real time, and detect free water and emulsified water in crude oil using a water content sensor, while simultaneously providing data feedback and parameter adjustment. This upgraded water-contaminated packer control device utilizes a control system to achieve the core functions of intelligent sensing, remote decision-making, and precise execution, making it a specialized intelligent manufacturing equipment for the petroleum industry.

[0003] However, when using existing wellhead sealing water-contaminated isolation control devices, due to the excessively high crude oil flow rate, the residence time of the measured oil-water mixture in the water cut sensor detection area is shorter than the sensor response time. As a result, the sensor cannot complete the complete signal acquisition and processing process and can only output a distorted "instantaneous value" instead of a stable value reflecting the true water cut. At the same time, the oil-water mixture often exists in the form of an emulsion, making it difficult for the sensor to accurately identify the ratio of the two phases, affecting the accuracy of the detection results. Furthermore, the water cut sensor is easily worn by the impact of crude oil, affecting the accuracy of its detection results and its service life.

[0004] Therefore, we propose a water-sealing control device for wellhead sealing. Summary of the Invention

[0005] The purpose of this invention is to provide a water-sealing control device for wellhead sealing, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a water-contaminated wellhead sealing control device, comprising a rubber sleeve, a central tube, and slips mounted on a packer body. The front end of the packer body is detachably connected to a fixed tube via an installation mechanism, and a mounting cover is fixedly connected to the bottom of the fixed tube. A rotating disk is rotatably connected inside the mounting cover via a rotating mechanism, and multiple sampling slots are provided on the top of the rotating disk. The sampling slots penetrate the bottom of the rotating disk. An oil inlet assembly is provided on the mounting cover, and a detection assembly for detecting water in crude oil is provided at the bottom of the mounting cover.

[0007] Preferably, the detection component includes a mounting tube connected to the bottom of the mounting cover, and a moisture content sensor is fixedly inserted inside the mounting tube.

[0008] By adopting the above technical solution, the crude oil sampled in the sampling tank can be detected when the rotating disk moves above the water content sensor.

[0009] Preferably, a protective pipe connects the mounting pipe and the fixing pipe.

[0010] The above technical solution is used to protect the connection wires of the moisture content sensor.

[0011] Preferably, the oil inlet assembly includes an oil inlet pipe communicating with the bottom of the mounting cover, and an oil outlet pipe communicating with the top of the mounting cover.

[0012] By adopting the above technical solution, when the sampling tank is connected to the oil inlet pipe, crude oil can sequentially enter each sampling tank through the oil inlet pipe, and after the sampling tank is full, it can be discharged through the oil outlet pipe.

[0013] Preferably, the rotating mechanism includes a first motor fixedly connected inside the fixed tube, the output end of the first motor being fixedly connected to a drive shaft, and the lower end of the drive shaft passing through the mounting cover and fixed to the top of the rotating disk.

[0014] By adopting the above technical solution, the first motor is started, and the drive shaft drives the rotating disk to rotate inside the mounting cover.

[0015] Preferably, the lifting and rotation of the central tube are driven by a drive mechanism, which includes a mounting frame, and a cylinder is fixedly connected to the top of the mounting frame. A first disc is fixedly connected to the telescopic end of the cylinder, and two symmetrically arranged connecting rods are fixedly connected to the bottom of the first disc. A lifting plate is fixedly connected to the lower end of the connecting rods, and a rotating tube is connected to the bottom of the lifting plate through a rotating assembly. The lower end of the rotating tube is detachably connected to the upper end of the central tube.

[0016] By adopting the above technical solution, the lower end of the rotating tube and the upper end of the central tube are detachably connected. In use, the cylinder is activated, which drives the first disc to move downwards. The connecting rod then drives the lifting disc and the rotating tube to move downwards. Subsequently, the central tube drives the packer body to move downwards along the wellhead and into place. When water is detected, the cylinder lifts the packer body. At the same time, the rotating assembly drives the rotating tube to rotate, which in turn drives the packer body to rotate clockwise. Then, the packer body is lowered. During this process, the slips gradually anchor, and the rubber sleeve expands under pressure to abut against the wellhead, forming a sealing effect. When water is encountered, intelligent control sealing of the wellhead can be achieved, making it safer and more reliable.

[0017] Preferably, the rotating assembly includes a gear ring fixedly sleeved on the side wall of the rotating tube, and a U-shaped frame is fixedly connected to the top of the lifting plate. A second motor is fixedly connected to the top of the U-shaped frame, and a gear is fixedly connected to the output end of the second motor, with the gear meshing with the gear ring.

[0018] By adopting the above technical solution, the second motor is started, and the rotation of the second motor drives the rotation of the gear, which in turn drives the rotating tube to rotate through the gear ring, thereby driving the packer body to rotate clockwise.

[0019] Preferably, a second disc is rotatably connected to the top of the rotating tube. The second disc is fixed to the top of the lifting plate by a bracket, and a cable routing hole is provided on the top of the second disc.

[0020] By adopting the above technical solution, when the rotating tube rotates, the second disk will not rotate, which makes it easy to pass the connecting wire through the central hollow part of the packer body and the rotating tube and lead it out through the wiring hole.

[0021] Preferably, the installation mechanism includes a flange that is fixedly sleeved on the side wall of the fixed pipe, with multiple bolts passing through the top of the flange, and the bolts being detachably connected to the bottom of the packer body.

[0022] By adopting the above technical solution, it is easy to detachably connect the fixing tube to the bottom of the packer body.

[0023] Preferably, an electric heating ring is fixedly sleeved on the side wall of the fixed tube.

[0024] By adopting the above technical solution, when water is detected, the electric heating ring is turned on for heating, preventing the water from solidifying at the wellhead and affecting the sealing effect of the rubber sleeve.

[0025] In summary: Advantage 1: When encountering water, it can achieve intelligent control and sealing of the wellhead, making it safer and more reliable; Advantage 2: Sampling is performed through the sampling slots on the rotating disk, and the sample is placed and tested while the disk is rotating, which can improve the accuracy of the test. Advantage 3: It can avoid the impact and wear of crude oil on the water content sensor, ensuring the detection effect and service life of the water content sensor. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram illustrating the usage state of the present invention; Figure 3 This is a schematic diagram illustrating the usage state from another perspective of the present invention; Figure 4This is a schematic diagram of the overall structure of the mounting cover in this invention; Figure 5 This is a partial cross-sectional view of the mounting cover, fixing tube, and electric heating ring in this invention. Figure 6 This is a partial cross-sectional view of the mounting cover, fixing tube, and electric heating ring from another perspective in this invention. Figure 7 This is a schematic diagram of the rotating disk in this invention; Figure 8 This is a schematic diagram of the drive mechanism in this invention.

[0027] In the diagram: 1. Packer body; 101. Glue tube; 102. Central tube; 103. Slipper; 201. Mounting tube; 202. Moisture content sensor; 301. Oil inlet pipe; 302. Oil outlet pipe; 401. First motor; 402. Drive shaft; 501. Flange; 502. Bolt; 6. Electric heating ring; 7. Protective tube; 801. Second disc; 802. Bracket; 803. Wiring hole; 901. Mounting bracket; 902. Cylinder; 903. First disc; 904. Connecting rod; 905. Lifting plate; 906. Rotating tube; 1001. Gear ring; 1002. U-shaped frame; 1003. Second motor; 1004. Gear; 11. Mounting cover; 12. Rotating disc; 13. Sampling slot; 14. Fixing tube. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1 Please see Figures 1-8The diagram shows a water-contaminated wellhead sealing control device, including a rubber sleeve 101, a central tube 102, and slips 103 mounted on the packer body 1. These are all well-known technologies in the field and will not be described in detail here. A detection module is detachably connected to the front end of the packer body 1 via an installation mechanism. The detection module includes a fixed tube 14, and a mounting cover 11 is fixedly connected to the bottom of the fixed tube 14. A rotating disk 12 is rotatably connected inside the mounting cover 11 via a rotating mechanism. Multiple sampling slots 13 are provided on the top of the rotating disk 12, with at least two sampling slots 13 arranged in a specific pattern. The sampling groove 13 is arranged in a fan shape and extends through the bottom of the rotating disk 12. An oil inlet component is provided on the mounting cover 11, and a detection component for detecting water in crude oil is provided at the bottom of the mounting cover 11. Sampling is performed through the sampling groove 13 on the rotating disk 12, and the sample is placed and tested during the rotation of the rotating disk 12. This can improve the accuracy of the detection. At the same time, it can avoid the impact and wear of crude oil on the water content sensor 202, ensuring the detection effect and service life of the water content sensor 202. Furthermore, it can achieve intelligent wellhead control sealing when encountering water, making it safer and more reliable.

[0030] The detection assembly includes a mounting tube 201 connected to the bottom of the mounting cover 11, and a moisture content sensor 202 is fixedly inserted inside the mounting tube 201. The bottom of the mounting tube 201 is sealed, and a sealing gasket is provided between the moisture content sensor 202 and the mounting tube 201 to ensure that its detection head is flush with the bottom of the mounting cover 11. It also includes a controller, all of which are well known in the art and will not be described in detail here. When the crude oil sampled in the sampling tank 13 rotates above the moisture content sensor 202 with the rotating disk 12, the moisture content can be detected. When the rotating disk 12 rotates, it can scrape and clean the impurities on the surface of the moisture content sensor 202.

[0031] A protective pipe 7 connects the mounting pipe 201 and the fixed pipe 14. The connecting wire of the moisture content sensor 202 passes through the bottom of the mounting pipe 201 and then enters the fixed pipe 14 through the inside of the protective pipe 7. It is then led out to the outside through the central hollow space of the packer body 1 and the rotating pipe 906 to protect the connecting wire of the moisture content sensor 202.

[0032] The oil inlet assembly includes an oil inlet pipe 301 connected to the bottom of the mounting cover 11, and an oil outlet pipe 302 connected to the top of the mounting cover 11. When the sampling tank 13 is connected to the oil inlet pipe 301, crude oil can sequentially enter each sampling tank 13 through the oil inlet pipe 301, and after the sampling tank 13 is full, it can be discharged through the oil outlet pipe 302.

[0033] The rotating mechanism includes a first motor 401 fixedly connected inside the fixed tube 14. The output end of the first motor 401 is fixedly connected to a drive shaft 402, and the lower end of the drive shaft 402 passes through the mounting cover 11 and is fixed to the top of the rotating disk 12. When the first motor 401 is started, the drive shaft 402 drives the rotating disk 12 to rotate inside the mounting cover 11.

[0034] The lifting and rotation of the central tube 102 are driven by a drive mechanism, which includes a mounting bracket 901. A cylinder 902 is fixedly connected to the top of the mounting bracket 901. A first disc 903 is fixedly connected to the telescopic end of the cylinder 902. Two symmetrically arranged connecting rods 904 are fixedly connected to the bottom of the first disc 903. A lifting plate 905 is fixedly connected to the lower end of the connecting rods 904. A rotating tube 906 is connected to the bottom of the lifting plate 905 via a rotating assembly. The lower end of the rotating tube 906 is detachably connected to the upper end of the central tube 102. In use, the cylinder 902 is activated. The first disc 903 is moved downwards, and the lifting disc 905 and rotating pipe 906 are moved downwards via the connecting rod 904. Then, the packer body 1 is moved downwards along the wellhead via the central pipe 102 and placed in position. When water is detected, the packer body 1 is lifted upwards via the cylinder 902. At the same time, the rotating component drives the rotating pipe 906 to rotate, which in turn drives the packer body 1 to rotate clockwise. Then, the packer body 1 is lowered. During this process, the slip 103 is gradually anchored, and the rubber sleeve 101 expands under pressure and abuts against the wellhead to form a sealing effect. When water is encountered, intelligent control sealing of the wellhead can be achieved, making it safer and more reliable.

[0035] The rotating assembly includes a gear ring 1001 fixedly sleeved on the side wall of the rotating tube 906, and a U-shaped frame 1002 fixedly connected to the top of the lifting plate 905. A second motor 1003 is fixedly connected to the top of the U-shaped frame 1002. A gear 1004 is fixedly connected to the output end of the second motor 1003, and the gear 1004 meshes with the gear ring 1001. When the second motor 1003 is started, the rotation of the second motor 1003 drives the rotation of the gear 1004, thereby driving the rotating tube 906 to rotate through the gear ring 1001, and then driving the packer body 1 to rotate clockwise.

[0036] The top of the rotating tube 906 is rotatably connected to a second disc 801. The second disc 801 is fixed to the top of the lifting plate 905 by a bracket 802, and a wiring hole 803 is provided on the top of the second disc 801. When the rotating tube 906 rotates, the second disc 801 will not rotate, which makes it easy to pass the connecting wire through the central hollow part of the packer body 1 and the rotating tube 906 and lead it out through the wiring hole 803.

[0037] The installation mechanism includes a flange 501 fixedly sleeved on the side wall of the fixed pipe 14. Multiple bolts 502 pass through the top of the flange 501, and the bolts 502 are detachably connected to the front end of the packer body 1, which facilitates the detachable connection between the fixed pipe 14 and the front end of the packer body 1.

[0038] An electric heating ring 6 is fixedly sleeved on the side wall of the fixed pipe 14. When water is detected, the electric heating ring 6 is opened for heating to prevent water from solidifying at the wellhead and affecting the sealing effect of the rubber sleeve 101.

[0039] Working principle: When in use, start cylinder 902, drive the first disc 903 to move downward, and drive the lifting disc 905 and rotating pipe 906 to move downward through connecting rod 904. Then, drive the packer body 1 to move downward along the wellhead through central pipe 102 and place it in place.

[0040] Next, the packer body 1 is lifted by cylinder 902. At the same time, the second motor 1003 is started. The rotation of the second motor 1003 drives the rotation of gear 1004, which in turn drives the rotating tube 906 to rotate through the gear ring 1001. This, in turn, drives the packer body 1 to rotate clockwise through the central tube 102. Then, the packer body 1 is lowered and anchored. The packer body 1 adopts the Y221 packer. Its structure and principle are well known in the field and will not be described in detail here. The anchoring process is existing technology.

[0041] During normal oil production, crude oil can pass between the installation cover 11 and the wellhead. The first motor 401 is started, and the drive shaft 402 drives the rotating disk 12 to rotate inside the installation cover 11. When the sampling tank 13 is connected to the oil inlet pipe 301, crude oil can enter each sampling tank 13 sequentially through the oil inlet pipe 301, and after the sampling tank 13 is full, it can be discharged through the oil outlet pipe 302.

[0042] After the sampling tank 13 is filled, the crude oil is allowed to settle in the sampling tank 13 as the rotating disk 12 rotates. If there is water, it will gradually settle at the bottom of the sampling tank 13.

[0043] When the crude oil sampled in the sampling tank 13 rotates above the water content sensor 202 along with the rotating disk 12, the water content can be detected. This allows the crude oil to settle, improving the accuracy of the detection. Furthermore, it avoids the impact and wear of the crude oil on the water content sensor 202, ensuring the detection effect and service life of the water content sensor 202.

[0044] When the sampling tank 13 rotates to the position where it is connected to the oil inlet pipe 301, the crude oil can re-enter the sampling tank 13 through the oil inlet pipe 301, and the original crude oil can be discharged through the oil outlet pipe 302.

[0045] When water is detected, the packer body 1 is lowered further by cylinder 902, which causes the rubber sleeve 101 to expand under pressure and come into contact with the wellhead, forming a sealing effect. The process of the rubber sleeve 101 expanding under pressure is also existing technology and will not be described in detail here. When encountering water, it can achieve intelligent control sealing of the wellhead, which is safer and more reliable.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, 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 process, method, article, or apparatus.

[0047] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A water-contaminated sealing control device for wellhead closure, comprising a rubber sleeve (101), a central tube (102), and slips (103) disposed on a packer body (1), characterized in that, The front end of the packer body (1) is detachably connected to a detection module via an installation mechanism. The detection module includes a fixed tube (14), and a mounting cover (11) is fixedly connected to the bottom of the fixed tube (14). A rotating disk (12) is rotatably connected inside the mounting cover (11) via a rotating mechanism. Multiple sampling slots (13) are provided on the top of the rotating disk (12). The sampling slots (13) are provided through the bottom of the rotating disk (12). An oil inlet assembly is provided on the mounting cover (11), and a detection assembly for detecting water in crude oil is provided at the bottom of the mounting cover (11).

2. The water-contaminated sealing control device for wellhead sealing according to claim 1, characterized in that: The detection component includes a mounting tube (201) connected to the bottom of the mounting cover (11), and a moisture content sensor (202) is fixedly inserted inside the mounting tube (201).

3. The water-contaminated sealing control device for wellhead sealing according to claim 2, characterized in that: A protective pipe (7) connects the installation pipe (201) and the fixing pipe (14).

4. The water-contaminated sealing control device for wellhead sealing according to claim 1, characterized in that: The oil inlet assembly includes an oil inlet pipe (301) connected to the bottom of the mounting cover (11), and an oil outlet pipe (302) connected to the top of the mounting cover (11).

5. A water-contaminated sealing control device for wellhead sealing according to claim 1, characterized in that: The rotating mechanism includes a first motor (401) fixedly connected inside the fixed tube (14), the output end of the first motor (401) is fixedly connected to a drive shaft (402), and the lower end of the drive shaft (402) passes through the mounting cover (11) and is fixed to the top of the rotating disk (12).

6. The water-contaminated sealing control device for wellhead sealing according to claim 1, characterized in that: The lifting and rotation of the central tube (102) are driven by a drive mechanism, which includes a mounting bracket (901). A cylinder (902) is fixedly connected to the top of the mounting bracket (901). A first disc (903) is fixedly connected to the telescopic end of the cylinder (902). Two symmetrically arranged connecting rods (904) are fixedly connected to the bottom of the first disc (903). A lifting plate (905) is fixedly connected to the lower end of the connecting rod (904). A rotating tube (906) is connected to the bottom of the lifting plate (905) through a rotating assembly. The lower end of the rotating tube (906) is detachably connected to the upper end of the central tube (102).

7. A water-contaminated sealing control device for wellhead sealing according to claim 6, characterized in that: The rotating assembly includes a gear ring (1001) fixedly sleeved on the side wall of the rotating tube (906), and a U-shaped frame (1002) fixedly connected to the top of the lifting plate (905). A second motor (1003) is fixedly connected to the top of the U-shaped frame (1002), and a gear (1004) is fixedly connected to the output end of the second motor (1003). The gear (1004) meshes with the gear ring (1001).

8. A water-contaminated sealing control device for wellhead sealing according to claim 6, characterized in that: The top of the rotating tube (906) is rotatably connected to a second disc (801). The second disc (801) is fixed to the top of the lifting plate (905) by a bracket (802), and a wiring hole (803) is provided on the top of the second disc (801).

9. A water-contaminated sealing control device for wellhead sealing according to claim 1, characterized in that: The installation mechanism includes a flange (501) fixedly sleeved on the side wall of the fixed pipe (14), with multiple bolts (502) passing through the top of the flange (501), and the bolts (502) being detachably connected to the bottom of the packer body (1).

10. A water-contaminated sealing control device for wellhead sealing according to claim 1, characterized in that: The side wall of the fixed tube (14) is fitted with an electric heating ring (6).

Images