High temperature drilling fluid recovery heat exchange device

Abstract

The utility model discloses a high temperature drilling fluid recycling heat exchange device, including the top open exchange jar, the top open cover of exchange jar is equipped with the upper cover body, the centre of upper cover body is equipped with the middle through -hole, and the inside of exchange jar is inserted with the liquid inlet pipe through the middle through -hole, and the bottom of liquid inlet pipe is provided with the liquid inlet tank, and the inner wall circumference of exchange jar is evenly provided with a plurality of communication cross -pipes that extend and converge to liquid inlet pipe, and the lower part of all communication cross -pipes is communicated with the liquid inlet tank, and the heat exchange tank is provided on communication cross -pipe, and the upper part of communication cross -pipe is communicated with heat exchange tank, and the outside of exchange jar is provided with heat exchange ring pipe, and the outside of all heat exchange tank top is communicated with heat exchange ring pipe, and the liquid outlet is opened on heat exchange ring pipe, and the liquid outlet is connected the liquid outlet end of liquid outlet pipe, and the tank wall of exchange jar is provided with liquid delivery port and liquid passage, and the utilization of drilling fluid is greatly improved, and the technical problem that drilling fluid cannot be used in time and heat is wasted caused by prior art is effectively solved.

Description

Technical Field

[0001] This utility model belongs to the field of drilling fluid heat recovery technology, specifically, it relates to a high-temperature drilling fluid recovery heat exchange device. Background Technology

[0002] Drilling fluid is a general term for various circulating fluids used in the drilling process; it is also known as drilling mud. During drilling, drilling fluid effectively cools and lubricates the drill bit, balances bottom pressure, and prevents blowouts and kicks. In addition, drilling fluid can transmit power and perform coring.

[0003] Because a large amount of waste residue is mixed into the drilling fluid during the drilling process, and the high cost of drilling fluid necessitates its reuse, drilling fluid recovery is particularly important. Currently, filtration is the primary method for drilling fluid recovery. However, the filtered drilling fluid needs to cool for a period of time before it can be used. This not only fails to meet the immediate demands of drilling fluid but also wastes heat when the high-temperature drilling fluid is allowed to cool. Therefore, a high-temperature drilling fluid recovery heat exchanger that is simple in structure, easy to operate, and capable of recovering heat from high-temperature drilling fluid to promptly meet its needs is required. Utility Model Content

[0004] The purpose of this invention is to provide a high-temperature drilling fluid recovery heat exchange device that is simple in structure, easy to operate, and capable of recovering heat from high-temperature drilling fluid to meet the needs of drilling fluid in a timely manner.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A high-temperature drilling fluid recovery heat exchange device includes an open-top exchange tank with an upper cover covering the top. A central through-hole is located in the center of the upper cover. An inlet pipe is inserted into the exchange tank through the central through-hole. An inlet tank is located at the bottom of the inlet pipe. Several connecting horizontal pipes extending towards the inlet pipe and converging are evenly arranged along the inner circumference of the exchange tank. The lower parts of all connecting horizontal pipes are connected to the inlet tank. A heat exchange box is installed on each connecting horizontal pipe, and the upper part of the connecting horizontal pipe is connected to the heat exchange box. A heat exchange ring pipe is installed on the outside of the exchange tank, and all heat exchange boxes are connected to the heat exchange ring pipe. An outlet is located on the heat exchange ring pipe and connected to the outlet end of the outlet pipe. A delivery port and a flow port are located on the tank wall of the exchange tank. The delivery port is located above the heat exchange ring pipe, and the flow port is located below the connecting horizontal pipes. The delivery port is connected to the delivery end of the delivery pipe, and the flow port is connected to the flow end of the flow pipe.

[0007] The heat exchange box includes a first vertical plate and a second vertical plate arranged opposite to each other. A sealing top plate is provided on the top of the first vertical plate and the second vertical plate. A sealing plate is provided at the end of the first vertical plate and the second vertical plate away from the inner wall of the heat exchange tank. The other end of the first vertical plate and the second vertical plate is connected to the inner wall of the heat exchange tank. The lower end of the first vertical plate and the second vertical plate is connected to a connecting horizontal pipe. The connecting horizontal pipe is provided with several upper connecting holes. The connecting horizontal pipe is connected to the heat exchange box through the upper connecting holes. Several lower connecting holes are provided at the bottom of the connecting horizontal pipe. The connecting horizontal pipe is connected to the liquid inlet tank through the lower connecting holes.

[0008] Several anti-expansion support rods are installed on the first and second vertical plates. The anti-expansion support rods pass between the first and second vertical plates and both ends are located outside the heat exchange box.

[0009] The bottom of the liquid inlet tank is open and sealed to the bottom plate of the exchange tank. The bottom plate of the exchange tank is connected to the first slag discharge pipe, which communicates with the inside of the liquid inlet tank. The first slag discharge pipe is equipped with a first slag discharge valve.

[0010] The bottom plate of the exchange tank is connected to a second slag discharge pipe located outside the liquid inlet tank, and a second slag discharge valve is installed on the second slag discharge pipe.

[0011] The liquid inlet tank is equipped with a liquid-blocking assembly, which includes a first liquid-blocking plate and a second liquid-blocking plate. The first liquid-blocking plate is set diagonally upward from left to right, and the second liquid-blocking plate is set diagonally downward from left to right. The right end of the first liquid-blocking plate is connected to the left end of the second liquid-blocking plate to form a herringbone structure. A first vertical rod is set on the first liquid-blocking plate, and a second vertical rod is set on the second liquid-blocking plate. The top end of the first vertical rod is connected to the first liquid-blocking plate, and the bottom end of the first vertical rod is connected to the bottom plate of the exchange tank. The top end of the second vertical rod is connected to the second liquid-blocking plate, and the bottom end of the second vertical rod is connected to the bottom plate of the exchange tank.

[0012] A connecting support rod is installed between the sealing vertical plate and the liquid inlet pipe.

[0013] A sealing ring is installed between the outer circle of the inlet pipe and the wall of the middle through hole, and a sealing gasket is installed between the bottom surface of the upper cover and the annular top surface of the exchange tank.

[0014] The upper cover has a vent hole, which is connected to a safety valve.

[0015] The heat exchange tank is covered with an insulation layer.

[0016] This application introduces coolant into the inlet pipe. After entering the inlet tank, the coolant flows through the lower connecting hole into the horizontal connecting pipe, and then through the upper connecting hole into the heat exchange tank. It further enters the heat exchange ring pipe and finally flows out through the outlet pipe, forming a heat exchange cycle to exchange heat with the high-temperature drilling fluid sent into the exchange tank through the delivery pipe. This achieves the purpose of timely cooling and heat recovery of the filtered high-temperature drilling fluid, greatly improving the thermal energy utilization rate of the high-temperature drilling fluid. It effectively solves the technical problem in the prior art that the filtered drilling fluid needs to be cooled for a period of time before it can be used, resulting in the drilling fluid not being used in time and heat being wasted. Attached Figure Description

[0017] Figure 1 This is a first-view sectional view of the present invention.

[0018] Figure 2 This is a cross-sectional view of the present invention from a second perspective. Detailed Implementation

[0019] like Figure 1-2 As shown, a high-temperature drilling fluid recovery heat exchange device includes an open-top exchange tank 1. An upper cover 2 is provided over the open top of the exchange tank 1. A central through-hole is formed in the center of the upper cover 2. An inlet pipe 3 is inserted into the exchange tank 1 through the central through-hole. An inlet tank 4 is located at the bottom of the inlet pipe 3. Several connecting horizontal pipes 5 are evenly arranged along the circumference of the inner wall of the exchange tank 1, extending towards and converging on the inlet pipe 3. The lower parts of all the connecting horizontal pipes 5 are connected to the inlet tank 4. A heat exchange box 6 is installed on each of the connecting horizontal pipes 5. The upper part of the connecting horizontal pipe 5 is connected to the heat exchange box 6. A heat exchange ring pipe 7 is provided on the outside of the heat exchange tank 1. The top outer side of all heat exchange boxes 6 is connected to the heat exchange ring pipe 7. An outlet is provided on the heat exchange ring pipe 7. The outlet is connected to the outlet end of the outlet pipe 8. A liquid delivery port and a liquid passage port are provided on the tank wall of the heat exchange tank 1. The liquid delivery port is located above the heat exchange ring pipe 7. The liquid passage port is located below the connecting horizontal pipe 5. The liquid delivery port is connected to the liquid delivery end of the liquid delivery pipe 9. The liquid passage port is connected to the liquid passage end of the liquid passage pipe 10.

[0020] The heat exchange box 6 includes a first vertical plate 11 and a second vertical plate 12 arranged opposite to each other. The top of the first vertical plate 11 and the second vertical plate 12 is provided with a sealing top plate. The end of the first vertical plate 11 and the second vertical plate 12 away from the inner wall of the exchange tank 1 is provided with a sealing vertical plate 13. The other end of the first vertical plate 11 and the second vertical plate 12 is connected to the inner wall of the exchange tank 1. The heat exchange box 6 is connected to the heat exchange ring pipe 7 through corresponding through holes provided on the inner wall of the exchange tank 1. The lower ends of the first vertical plate 11 and the second vertical plate 12 are connected to the connecting horizontal pipe 5. The connecting horizontal pipe 5 is provided with a plurality of upper connecting holes 14. The connecting horizontal pipe 5 is connected to the heat exchange box 6 through the upper connecting holes 14. The bottom of the connecting horizontal pipe 5 is provided with a plurality of lower connecting holes 15. The connecting horizontal pipe 5 is connected to the liquid inlet tank 4 through the lower connecting holes 15.

[0021] Several anti-expansion support rods 16 are installed on the first vertical plate 11 and the second vertical plate 12. The anti-expansion support rods 16 pass through the space between the first vertical plate 11 and the second vertical plate 12, and both ends are located outside the heat exchange box 6. When the coolant in the heat exchange box 6 is heated, it can easily cause the first vertical plate 11 and the second vertical plate 12 to expand. Setting up the corresponding anti-expansion support rods 16 can enhance the connection between the first vertical plate 11 and the second vertical plate 12, effectively preventing the expansion of the first vertical plate 11 and the second vertical plate 12. In addition, the two ends of the anti-expansion support rods 16 are located outside the heat exchange box 6 (the two ends of the anti-expansion support rods 16 extend out of the heat exchange box 6), which can increase the heat exchange area and improve the heat exchange efficiency.

[0022] The bottom of the inlet tank 4 is open and sealed to the bottom plate of the exchange tank 1. The bottom plate of the exchange tank 1 is connected to a first slag discharge pipe 17 that communicates with the inside of the inlet tank 4. A first slag discharge valve 18 is installed on the first slag discharge pipe 17. The coolant used is pure water that is not prone to scaling at high temperatures. Some impurities in the pure water will settle at the bottom of the inlet tank 4. During routine maintenance, the first slag discharge valve 18 can be opened to discharge the settled impurities.

[0023] The bottom plate of the exchange tank 1 is connected to a second slag discharge pipe 19 (multiple pipes can be installed) located outside the inlet tank 4. The second slag discharge pipe 19 is equipped with a second slag discharge valve 20. After filtration, the drilling fluid will still contain some slag. By opening the second slag discharge valve 20, the slag that has settled at the bottom of the inlet tank 4 can be discharged.

[0024] The inlet tank 4 is equipped with a liquid-blocking assembly, which includes a first liquid-blocking plate 21 and a second liquid-blocking plate 22. The first liquid-blocking plate 21 is arranged diagonally upward from left to right, and the second liquid-blocking plate 22 is arranged diagonally downward from left to right. The right end of the first liquid-blocking plate 21 is connected to the left end of the second liquid-blocking plate 22 to form a V-shaped structure. A first vertical rod 23 is provided on the first liquid-blocking plate 21, and a second vertical rod 24 is provided on the second liquid-blocking plate 22. The top end of the first vertical rod 23 is connected to the first liquid-blocking plate 21, and the bottom end of the first vertical rod 23 is connected to the bottom plate of the exchange tank 1. The top end of the second vertical rod 24 is connected to the second liquid-blocking plate 22, and the bottom end of the second vertical rod 24 is connected to the bottom plate of the exchange tank 1. The first liquid-blocking plate 21 and the second liquid-blocking plate 22 reduce the disturbance of the purified water discharged downward from the inlet pipe 3 on the impurities that have settled to the bottom of the inlet tank 4.

[0025] A connecting support rod 25 is provided between the sealing vertical plate 13 and the liquid inlet pipe 3 to ensure the reliability of the installation of the liquid inlet pipe 3.

[0026] A sealing ring 26 is provided between the outer circle of the inlet pipe 3 and the wall of the middle through hole, and a sealing gasket 27 is provided between the bottom surface of the upper cover 2 and the annular top surface of the exchange tank 1.

[0027] The upper cover 2 has a vent hole connected to a safety valve 28. When the pressure inside the exchange tank 1 reaches the set pressure value of the safety valve 28, the safety valve 28 automatically opens to release air and / or drain liquid, preventing the exchange tank 1 from rupturing due to excessive temperature or pressure. The safety valve 27 is existing technology and is commercially available; its specific structure will not be described in detail.

[0028] The exterior of the heat exchange tank 1 is covered with an insulation layer 29 (to reduce heat loss). Several support legs 30 can also be installed at the bottom of the heat exchange tank 1 to support the entire device.

[0029] In practical use, the coolant is continuously introduced into the inlet tank 4 through the inlet pipe 3 (generally, pure water is sufficient). The coolant enters each connecting horizontal pipe 5 through the lower connecting hole 15, and then enters each heat exchange box 6 through the upper connecting hole 14 on the connecting horizontal pipe 5, and then enters the heat exchange ring pipe 7. Finally, it flows out of the exchange tank 1 through the outlet pipe 8 to form a heat exchange cycle. The high-temperature drilling fluid after filtering mud and sand is introduced into the exchange tank 1 through the delivery pipe 9. The high-temperature drilling fluid flows from top to bottom outside the heat exchange box 6. After heat exchange with the coolant in the heat exchange box 6, the high-temperature drilling fluid flows out of the exchange tank 1 through the liquid passage pipe 10, completing the heat recovery of the high-temperature drilling fluid. This greatly improves the thermal energy utilization rate of the drilling fluid and effectively solves the technical problem in the prior art that the filtered drilling fluid needs to be cooled for a period of time before it can be used, resulting in the drilling fluid not being used in time and heat being wasted.

[0030] The above embodiments are only used to illustrate and not limit the technical solutions of this utility model. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the utility model without departing from the spirit and scope of the utility model. Any modifications or partial substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A high-temperature drilling fluid recovery heat exchange device, characterized in that: The system includes an open-top heat exchange tank with an upper cover. A central through-hole is located on the upper cover, through which an inlet pipe is inserted. An inlet tank is located at the bottom of the inlet pipe. Several horizontal connecting pipes, extending towards and converging from the inlet pipe, are evenly arranged along the inner circumference of the tank's inner wall. The lower parts of all horizontal connecting pipes are connected to the inlet tank. A heat exchange box is mounted on each horizontal connecting pipe, and the upper part of the horizontal connecting pipe is connected to the heat exchange box. A heat exchange ring pipe is located on the outer side of the tank, and all heat exchange boxes are connected to the heat exchange ring pipe. An outlet is located on the heat exchange ring pipe and connected to the outlet end of an outlet pipe. A delivery port and a flow port are located on the tank wall. The delivery port is located above the heat exchange ring pipe, and the flow port is located below the horizontal connecting pipes. The delivery port is connected to the delivery end of the delivery pipe, and the flow port is connected to the flow end of the flow pipe.

2. The high-temperature drilling fluid recovery heat exchange device according to claim 1, characterized in that: The heat exchange box includes a first vertical plate and a second vertical plate arranged opposite to each other. A sealing top plate is provided on the top of the first vertical plate and the second vertical plate. A sealing plate is provided at the end of the first vertical plate and the second vertical plate away from the inner wall of the heat exchange tank. The other end of the first vertical plate and the second vertical plate is connected to the inner wall of the heat exchange tank. The lower end of the first vertical plate and the second vertical plate is connected to a connecting horizontal pipe. The connecting horizontal pipe is provided with several upper connecting holes. The connecting horizontal pipe is connected to the heat exchange box through the upper connecting holes. Several lower connecting holes are provided at the bottom of the connecting horizontal pipe. The connecting horizontal pipe is connected to the liquid inlet tank through the lower connecting holes.

3. The high-temperature drilling fluid recovery heat exchange device according to claim 2, characterized in that: Several anti-expansion support rods are installed on the first and second vertical plates. The anti-expansion support rods pass between the first and second vertical plates and both ends are located outside the heat exchange box.

4. The high-temperature drilling fluid recovery heat exchange device according to claim 3, characterized in that: The bottom of the liquid inlet tank is open and sealed to the bottom plate of the exchange tank. The bottom plate of the exchange tank is connected to the first slag discharge pipe, which communicates with the inside of the liquid inlet tank. The first slag discharge pipe is equipped with a first slag discharge valve.

5. The high-temperature drilling fluid recovery heat exchange device according to claim 4, characterized in that: The bottom plate of the exchange tank is connected to a second slag discharge pipe located outside the liquid inlet tank, and a second slag discharge valve is installed on the second slag discharge pipe.

6. The high-temperature drilling fluid recovery heat exchange device according to claim 5, characterized in that: The liquid inlet tank is equipped with a liquid-blocking assembly, which includes a first liquid-blocking plate and a second liquid-blocking plate. The first liquid-blocking plate is set diagonally upward from left to right, and the second liquid-blocking plate is set diagonally downward from left to right. The right end of the first liquid-blocking plate is connected to the left end of the second liquid-blocking plate to form a herringbone structure. A first vertical rod is set on the first liquid-blocking plate, and a second vertical rod is set on the second liquid-blocking plate. The top end of the first vertical rod is connected to the first liquid-blocking plate, and the bottom end of the first vertical rod is connected to the bottom plate of the exchange tank. The top end of the second vertical rod is connected to the second liquid-blocking plate, and the bottom end of the second vertical rod is connected to the bottom plate of the exchange tank.

7. The high-temperature drilling fluid recovery heat exchange device according to claim 6, characterized in that: A connecting support rod is installed between the sealing vertical plate and the liquid inlet pipe.

8. The high-temperature drilling fluid recovery heat exchange device according to claim 7, characterized in that: A sealing ring is installed between the outer circle of the inlet pipe and the wall of the middle through hole, and a sealing gasket is installed between the bottom surface of the upper cover and the annular top surface of the exchange tank.

9. A high-temperature drilling fluid recovery heat exchange device according to claim 8, characterized in that: The upper cover has a vent hole, which is connected to a safety valve.

10. A high-temperature drilling fluid recovery heat exchange device according to claim 9, characterized in that: The heat exchange tank is covered with an insulation layer.

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