Drilling fluid slag recovery treatment and heat energy utilization integrated device

Abstract

The utility model discloses a drilling fluid slag recovery treatment and heat energy utilization integrated device which comprises a treatment tank with an upper opening and a lower opening, the bottom of the treatment tank is of a conical barrel structure with a thick upper portion and a thin lower portion, a bottom end necking opening of the treatment tank is connected with a precipitation pipe, the bottom end of the precipitation pipe is connected with a spiral conveyor, and a sealing cover is arranged at the top end of the treatment tank. A liquid feeding opening is formed in the side wall of the treatment tank and is connected with a liquid feeding pipe; a first cooling ring pipe and a second cooling ring pipe are symmetrically arranged on the outer side of the treatment tank up and down, a plurality of heat exchange boxes are evenly arranged in the treatment tank along the circumference of the inner wall, the tops of the sides, close to the inner wall of the treatment tank, of the heat exchange boxes communicate with the first cooling ring pipe, and the bottoms of the sides, close to the inner wall of the treatment tank, of the heat exchange boxes communicate with the second cooling ring pipe. According to the drilling fluid residue recycling device, recycling of drilling fluid residues and utilization of heat energy can be achieved, and the problems that existing filtering equipment can only filter drilling fluid, so that heat energy is wasted, and the heat energy cannot be used in time are solved.

Description

Technical Field

[0001] This utility model belongs to the field of drilling fluid recovery technology, specifically, it relates to an integrated device for drilling fluid slag recovery and heat energy utilization. Background Technology

[0002] Oil drilling engineering is a systematic project that utilizes drilling equipment to drill through multiple formations along a designed trajectory from the surface to reach the predetermined target layer (oil and gas layer or potential oil and gas layer), forming a stable channel (i.e., an oil and gas well) for the extraction or injection of the required fluids (water, gas, steam). During and after drilling, it involves coring, logging, well logging, and testing to obtain various information needed for exploration, development, and drilling. A large amount of drilling fluid is required during drilling. Drilling fluid is a general term for all circulating fluids used in the drilling process; it is also called drilling mud. During drilling, drilling fluid effectively cools and lubricates the drill bit, balances bottom layer pressure, and prevents blowouts and kicks. In addition, drilling fluid also transmits power and facilitates core sampling.

[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 crucial. Currently, filtration is the primary method for drilling fluid recovery. However, existing drilling fluid filtration equipment is cumbersome and complex to operate. Furthermore, the filtration effect of existing equipment is unsatisfactory, often requiring numerous steps without yielding usable drilling fluid. In addition, the filtered drilling fluid requires a cooling period before reuse, leading to delays in meeting drilling fluid usage requirements and wasting heat. Therefore, a simple, easy-to-operate, integrated device for drilling fluid residue recovery and heat energy utilization is needed. Utility Model Content

[0004] The purpose of this invention is to provide an integrated device for drilling fluid slag recovery and heat energy utilization that is simple in structure, easy to operate, and can achieve drilling fluid filtration and heat recovery.

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

[0006] An integrated device for the recovery, treatment and thermal energy utilization of drilling fluid cuttings includes a treatment tank with open upper and lower ends. The bottom of the treatment tank is a conical structure with a wider top and a narrower bottom. A sedimentation pipe is connected to the lower end of the treatment tank. A screw conveyor is connected to the bottom of the sedimentation pipe. A sealing cap is provided at the top of the treatment tank. A liquid delivery port is provided on the side wall of the treatment tank. The liquid delivery port is connected to a liquid delivery pipe.

[0007] The outer side of the treatment tank is symmetrically equipped with a first cooling ring pipe and a second cooling ring pipe. Several heat exchange boxes are evenly arranged along the inner circumference of the inner wall of the treatment tank. The top of the heat exchange box near the inner wall of the treatment tank is connected to the first cooling ring pipe, and the bottom of the heat exchange box near the inner wall of the treatment tank is connected to the second cooling ring pipe. The first cooling ring pipe has a liquid inlet, and the second cooling ring pipe has a liquid outlet. The liquid inlet is connected to a liquid inlet pipe, and the liquid outlet is connected to a liquid outlet pipe.

[0008] A filter tube is installed horizontally inside the treatment tank. The filter tube is located below the heat exchange box. The left end of the filter tube is the filter port and is located inside the treatment tank, while the right end of the filter tube is the drilling fluid outlet and is located outside the treatment tank.

[0009] A filter cage covering the left port is provided at the left end of the filter tube.

[0010] The filter cage is equipped with a first baffle, a second baffle, and several vertical support rods. The first baffle is set diagonally upward from left to right, and the second baffle is set diagonally downward from left to right. The right end of the first baffle and the left end of the second baffle are connected to form a herringbone structure. The top of the vertical support rod is set at the connection between the first baffle and the second baffle, and the bottom of the vertical support rod is set on the filter cage.

[0011] Several reinforcing support rods are installed between the vertical support rod and the first and second baffles.

[0012] Several support braces are arranged horizontally along the circumference of the filter tube. The left end of the support brace is set on the filter tube, and the right end of the support brace is set on the inner wall of the treatment tank.

[0013] The filter tube is equipped with a support rod, with the top end of the support rod on the filter tube and the bottom end on the inner wall of the conical structure at the bottom of the treatment tank.

[0014] A sealing ring is installed between the outer circle of the filter tube and the through hole on the wall of the treatment tank, and a sealing gasket is installed between the bottom surface of the sealing cover and the annular top surface of the treatment tank.

[0015] The heat exchange box includes a first vertical plate and a second vertical plate arranged opposite to each other. One end of the first vertical plate and the second vertical plate is sealed to the inner wall of the processing tank. The other end of the first vertical plate and the second vertical plate is provided with a connecting vertical plate. The top of the first vertical plate and the second vertical plate is provided with a sealing top plate. The bottom of the first vertical plate and the second vertical plate is provided with a sealing bottom plate. Several anti-expansion support rods are installed on the first vertical plate and the second vertical plate. The anti-expansion support rods pass between the first vertical plate and the second vertical plate and both ends are located outside the heat exchange box.

[0016] The sealing cap has a vent hole, which is connected to a safety valve.

[0017] The processing tank is covered with an insulation layer.

[0018] The processing tank of this application is equipped with a conical structure at the bottom, which is thicker at the top and thinner at the bottom, and a sedimentation pipe is connected to the lower end to settle drilling fluid cuttings. At the same time, this application is equipped with several heat exchange boxes inside the processing tank. By introducing heat exchange fluid into the heat exchange boxes, heat is recovered from the drilling fluid. After heat recovery, the drilling fluid is discharged through a filter pipe after the cuttings have settled, realizing the recovery of drilling fluid cuttings and the utilization of heat energy. This effectively solves the technical problem that existing filtration equipment can only filter drilling fluid, resulting in heat energy waste and inability to use it in a timely manner. Attached Figure Description

[0019] Figure 1 This is a first-view cross-sectional schematic diagram of the present invention.

[0020] Figure 2 yes Figure 1 Enlarged view of section A.

[0021] Figure 3 yes Figure 1 Enlarged view of section B in the middle.

[0022] Figure 4 This is a cross-sectional view of the present invention from a second perspective. Detailed Implementation

[0023] like Figure 1-4 As shown, an integrated device for the recovery, treatment, and thermal energy utilization of drilling fluid cuttings includes a treatment tank 1 with open upper and lower ends. The lower part of the treatment tank 1 is cylindrical, and the bottom of the treatment tank 1 is a conical structure that is wider at the top and narrower at the bottom. A sedimentation pipe 2 is connected to the lower end of the treatment tank 1, and a screw conveyor 3 is connected to the bottom outlet of the sedimentation pipe 2. A sealing cap 4 is provided at the top of the treatment tank 1, and a liquid delivery port is provided on the side wall of the treatment tank 1, which is connected to a liquid delivery pipe 5. The conical structure that is wider at the top and narrower at the bottom is conducive to the sedimentation of drilling fluid cuttings, and the bottom of the sedimentation pipe 2 is a constricted structure that corresponds to the feed port of the screw conveyor 3, which can more effectively facilitate the sedimentation of drilling fluid cuttings.

[0024] The outer side of the treatment tank 1 is symmetrically equipped with a first cooling ring pipe 6 and a second cooling ring pipe 7. Several heat exchange boxes 8 are evenly arranged along the inner circumference of the inner wall of the treatment tank 1. The top of the heat exchange box 8 near the inner wall of the treatment tank 1 is connected to the first cooling ring pipe 6, and the bottom of the heat exchange box 8 near the inner wall of the treatment tank 1 is connected to the second cooling ring pipe 7. The first cooling ring pipe 6 has a liquid inlet, and the second cooling ring pipe 7 has a liquid outlet. The liquid inlet is connected to the liquid inlet pipe 9, and the liquid outlet is connected to the liquid outlet pipe 10. The corresponding coolant is continuously introduced into the first cooling ring pipe 6 through the liquid inlet pipe 9. The coolant enters each heat exchange box 8 and is continuously discharged from the treatment tank 1 through the liquid outlet on the second cooling ring pipe 7 and the liquid outlet pipe 10, forming a cooling cycle to exchange heat with the drilling fluid introduced into the treatment tank 1 and recover heat energy.

[0025] A filter pipe 11 is horizontally arranged inside the treatment tank 1. The liquid delivery port is located above the heat exchange box 8, and the filter pipe 11 is located below the heat exchange box 8. The left end of the filter pipe 11 is the filter port and is located inside the treatment tank 1, while the right end of the filter pipe 11 is the drilling fluid outlet and is located outside the treatment tank 1.

[0026] A filter cage 12 is provided at the left end of the filter tube 11 to cover the left port. The filter cage 12 covers the left port of the filter tube 11, and fine debris in the drilling fluid after sedimentation can also be filtered, further improving the filtration effect.

[0027] A baffle assembly is provided on the filter cage 12. The baffle assembly includes a first baffle 13, a second baffle 14, and several vertical support rods 15. The first baffle 13 is arranged diagonally upward from left to right, and the second baffle 14 is arranged diagonally downward from left to right. The right end of the first baffle 13 and the left end of the second baffle 14 are connected to form a herringbone structure. The top end of the vertical support rod 15 is located at the connection between the first baffle 13 and the second baffle 14, and the bottom end of the vertical support rod 15 is located on the filter cage 12. The baffle assembly on the filter cage 12, and the herringbone structure formed by the first baffle 13 and the second baffle 14, ensures that the drilling fluid entering the treatment tank 1 undergoes sedimentation of cuttings first. If the baffle assembly is not provided, large pieces of cuttings will be blocked by the filter cage 12 when the drilling fluid passes through it, which can easily cause blockage of the filter cage 12. Therefore, the baffle assembly can effectively prevent large pieces of cuttings from clogging the filter cage 12.

[0028] Several reinforcing support rods 16 are provided between the vertical support rod 15 and the first baffle 13 and the second baffle 14.

[0029] Several supporting inclined rods 17 are arranged horizontally along the circumference of the filter tube 11. The left end of the supporting inclined rod 17 is set on the filter tube 11, and the right end of the supporting inclined rod 17 is set on the inner wall of the treatment tank 1.

[0030] A support rod 18 is provided on the filter tube 11. The top end of the support rod 18 is located on the filter tube 11, and the bottom end of the support rod 18 is located on the inner wall of the conical structure at the bottom of the treatment tank 1.

[0031] A sealing ring 19 is provided between the outer circle of the filter tube 11 and the through hole on the wall of the treatment tank 1, and a sealing gasket 20 is provided between the bottom surface of the sealing cover 4 and the annular top surface of the treatment tank 1.

[0032] The heat exchange box 8 includes a first vertical plate 21 and a second vertical plate 22 arranged opposite to each other. One end of the first vertical plate 21 and the second vertical plate 22 is sealed to the inner wall of the processing tank 1. The other end of the first vertical plate 21 and the second vertical plate 22 is provided with a connecting vertical plate 23. A sealing top plate 24 is provided at the top of the first vertical plate 21 and the second vertical plate 22. A sealing bottom plate 25 is provided at the bottom of the first vertical plate 21 and the second vertical plate 22. A plurality of anti-expansion support rods 26 are installed on the first vertical plate 21 and the second vertical plate 22. The anti-expansion support rods 26 pass through the first vertical plate 21 and the second vertical plate 22. Between the two vertical plates 22 and with both ends located outside the heat exchange box 8, the first vertical plate 21 and the second vertical plate 22 are prone to expansion when the coolant inside the heat exchange box 8 is heated. Setting up corresponding anti-expansion support rods 26 can enhance the connection between the first vertical plate 21 and the second vertical plate 22, effectively preventing the expansion of the first vertical plate 21 and the second vertical plate 22. In addition, the two ends of the anti-expansion support rods 26 are located outside the heat exchange box 8 (the two ends of the anti-expansion support rods 26 extend out of the heat exchange box 8), which can increase the heat exchange area and improve the heat exchange efficiency.

[0033] A vent is provided on the sealing cover 4, and a safety valve 27 is connected to the vent. When the internal pressure of the treatment tank 1 reaches the set pressure value of the safety valve 27, the safety valve 27 automatically opens to release air and / or drain liquid, preventing the treatment tank 1 from rupturing due to excessive temperature or pressure.

[0034] The exterior of the treatment tank 1 is covered with an insulation layer 28 (to reduce heat loss), and several support legs 29 can also be installed at the bottom of the treatment tank 1 to support the entire device.

[0035] In practical use, coolant (generally pure water is sufficient) is continuously introduced into the first cooling ring pipe 6 through the inlet pipe 9. The coolant enters each heat exchange box 8 through the first cooling ring pipe 6 and flows out of the treatment tank 1 through the outlet on the second cooling ring pipe 7 and the outlet pipe 10 to form a cooling cycle. At the same time, drilling fluid is introduced into the treatment tank 1 through the delivery pipe 5. After entering the treatment tank 1, the drilling fluid first exchanges heat with the coolant in the heat exchange box 8. The slag in the drilling fluid settles in the conical structure and sedimentation pipe 2 at the bottom of the treatment tank 1. The drilling fluid is continuously introduced and passes through the filter cage. After filtration, the drilling fluid flows out of the treatment tank 1 through the filter pipe 11 (a corresponding recovery tank can also be set at the outlet of the filter pipe 11 to recover the filtered and heat-exchanged drilling fluid for reuse). When the slag accumulates in the sedimentation pipe 2, it can be sent out by the screw conveyor 3 (unavoidably, some of the recovered drilling fluid will flow out with the slag, but this will not affect the overall operation. The discharged slag can be further separated into solid and liquid, and the liquid can still be reused as drilling fluid). By continuously feeding drilling fluid into the treatment tank 1, continuous drilling fluid filtration and heat exchange can be achieved until all drilling fluid is recovered.

[0036] The bottom of the treatment tank 1 in this application is designed as a conical structure with a wider top and a narrower bottom, and a sedimentation pipe 2 is connected to the lower end for sedimentation of drilling fluid debris. At the same time, this application provides several heat exchange boxes 8 inside the treatment tank 1. By introducing heat exchange fluid into the heat exchange boxes 8, heat is recovered from the drilling fluid. After heat recovery, the drilling fluid is discharged through the filter pipe 11 after the debris has settled, realizing the recovery of drilling fluid debris and the utilization of heat energy. This effectively solves the technical problem that existing filtration equipment can only filter drilling fluid, resulting in heat energy waste and inability to be used in a timely manner.

[0037] It should be noted that the screw conveyor 3, safety valve 27, etc. are all existing technologies and can be purchased on the market. Their specific structures will not be described in detail.

[0038] 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. An integrated device for drilling fluid cuttings recovery, treatment, and thermal energy utilization, characterized in that: The treatment tank includes an open-top and open-bottom tank. The bottom of the treatment tank is a conical structure that is wider at the top and narrower at the bottom. A sedimentation pipe is connected to the lower end of the treatment tank. A screw conveyor is connected to the bottom of the sedimentation pipe. A sealing cap is installed at the top of the treatment tank. A liquid delivery port is installed on the side wall of the treatment tank. The liquid delivery port is connected to a liquid delivery pipe. The outer side of the treatment tank is symmetrically equipped with a first cooling ring pipe and a second cooling ring pipe. Several heat exchange boxes are evenly arranged along the inner circumference of the inner wall of the treatment tank. The top of the heat exchange box near the inner wall of the treatment tank is connected to the first cooling ring pipe, and the bottom of the heat exchange box near the inner wall of the treatment tank is connected to the second cooling ring pipe. The first cooling ring pipe has a liquid inlet, and the second cooling ring pipe has a liquid outlet. The liquid inlet is connected to a liquid inlet pipe, and the liquid outlet is connected to a liquid outlet pipe. A filter tube is installed horizontally inside the treatment tank. The filter tube is located below the heat exchange box. The left end of the filter tube is the filter port and is located inside the treatment tank, while the right end of the filter tube is the drilling fluid outlet and is located outside the treatment tank.

2. The integrated device for drilling fluid cuttings recovery, treatment, and thermal energy utilization according to claim 1, characterized in that: A filter cage covering the left port is provided at the left end of the filter tube.

3. The integrated device for drilling fluid cuttings recovery, treatment, and thermal energy utilization according to claim 2, characterized in that: The filter cage is equipped with a first baffle, a second baffle, and several vertical support rods. The first baffle is set diagonally upward from left to right, and the second baffle is set diagonally downward from left to right. The right end of the first baffle and the left end of the second baffle are connected to form a herringbone structure. The top of the vertical support rod is set at the connection between the first baffle and the second baffle, and the bottom of the vertical support rod is set on the filter cage.

4. The integrated device for drilling fluid cuttings recovery, treatment, and thermal energy utilization according to claim 3, characterized in that: Several reinforcing support rods are installed between the vertical support rod and the first and second baffles.

5. The integrated device for drilling fluid cuttings recovery, treatment, and thermal energy utilization according to claim 4, characterized in that: Several support braces are arranged horizontally along the circumference of the filter tube. The left end of the support brace is set on the filter tube, and the right end of the support brace is set on the inner wall of the treatment tank.

6. The integrated device for drilling fluid cuttings recovery, treatment, and thermal energy utilization according to claim 5, characterized in that: The filter tube is equipped with a support rod, with the top end of the support rod on the filter tube and the bottom end on the inner wall of the conical structure at the bottom of the treatment tank.

7. The integrated device for drilling fluid cuttings recovery, treatment, and thermal energy utilization according to claim 6, characterized in that: A sealing ring is installed between the outer circle of the filter tube and the through hole on the wall of the treatment tank, and a sealing gasket is installed between the bottom surface of the sealing cover and the annular top surface of the treatment tank.

8. The integrated device for drilling fluid cuttings recovery, treatment, and thermal energy utilization according to claim 7, characterized in that: The heat exchange box includes a first vertical plate and a second vertical plate arranged opposite to each other. One end of the first vertical plate and the second vertical plate is sealed to the inner wall of the processing tank. The other end of the first vertical plate and the second vertical plate is provided with a connecting vertical plate. The top of the first vertical plate and the second vertical plate is provided with a sealing top plate. The bottom of the first vertical plate and the second vertical plate is provided with a sealing bottom plate. Several anti-expansion support rods are installed on the first vertical plate and the second vertical plate. The anti-expansion support rods pass between the first vertical plate and the second vertical plate and both ends are located outside the heat exchange box.

9. The integrated device for drilling fluid cuttings recovery, treatment, and thermal energy utilization according to claim 8, characterized in that: The sealing cap has a vent hole, which is connected to a safety valve.

10. The integrated device for drilling fluid cuttings recovery, treatment, and thermal energy utilization according to claim 9, characterized in that: The processing tank is covered with an insulation layer.

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