A modular drilling fluid cooling device

Abstract

The present invention discloses a modular drilling fluid cooling device, including a cooling skid, a water tower skid I, a water tower skid II, a water tank skid and a quick-connect pipeline. The four skids are all frame-type designs of the same size, and container corner pieces are welded on the four corners of the upper and lower end faces for lifting and bolting. The sand pump sucks in the high-temperature drilling fluid through the pre-filter, and is discharged after being cooled by the two-stage plate heat exchanger for drilling operations; the water pump group supplies cooling water from the two-stage plate heat exchanger to exchange heat with the high-temperature drilling fluid, and then enters 8 cooling water towers through the confluent manifold, and then flows back to the water tank through the quick-connect pipeline, forming a cooling water circulation for the entire device. The drilling fluid cooling device of the present invention can meet the cooling needs of large-displacement high-temperature drilling fluid, effectively improve the quality of drilling operations, and at the same time has the advantages of unified structure, simple maintenance, convenient transportation, and convenient and reliable on-site installation, positioning and connection.

Description

Technical Field

[0001] The invention belongs to the technical field of oilfield drilling equipment, and in particular relates to a modular drilling fluid cooling device. Background Art

[0002] In recent years, with the increase in energy demand and the development of oil drilling technology, deep wells, ultra-deep wells, high-temperature and high-pressure wells, shale gas horizontal wells and natural gas hydrate wells have become important aspects of the development of the drilling industry. During the drilling process, the formation temperature will increase with the increase in depth and horizontal length, and the bottom hole temperature can be as high as 200℃-260℃; at the same time, the increase in formation temperature will cause the temperature of the circulating drilling fluid to increase, and the circulating temperature can be as high as 180℃-200℃. This seriously affects the performance of the drilling fluid and the normal service life of downhole tools, thereby greatly reducing the efficiency and safety and reliability of drilling operations. Therefore, it is very necessary to cool the drilling fluid in time during the drilling process to make it reach a suitable temperature.

[0003] The existing equipment currently has poor cooling effect and high maintenance cost. In addition, each skid has different structures and numerous components, resulting in many transport units, overweight and over-limit, large footprint, and difficult on-site connection. Summary of the invention

[0004] The object of the present invention is to provide a modular drilling fluid cooling device, which can meet the cooling demand of a large displacement of high-temperature drilling fluid, thereby effectively improving the quality of drilling operations.

[0005] The technical solution adopted by the present invention is: a modular drilling fluid cooling device, including a cooling skid, a water tank skid, a water tower skid I, a water tower skid II and a quick-connect pipeline; the four skids are all designed as frame structures, with the same outline dimensions, and the four corners of the upper and lower end surfaces are welded with container corner pieces for lifting and bolting; the cooling skid and the water tank skid are positioned and placed in parallel and fixed by a conical positioning block and a pin shaft;

[0006] The four container corner fittings on the upper end face of the cooling skid are respectively bolted to the four container corner fittings on the lower end face of the water tower skid I through a turn lock, and the four container corner fittings on the upper end face of the water tank skid are also respectively bolted to the four container corner fittings on the lower end face of the water tower skid II through a turn lock; the four skids are stacked and fixed in pairs, the cooling skid and the water tank skid are connected by a quick-connect pipeline, and the cooling skid is connected to the water tower skid I and the water tower skid II respectively through the quick-connect pipeline; the connection methods of the quick-connect pipeline include flange connection, flexible clamp and flexible joint, and the quick-connect pipeline is fixed in the water tank during transportation and lifting.

[0007] The present invention is also characterized in that:

[0008] The electric control box, sand pump, water supply pump, filter, water pump group, pipeline assembly, stage I plate heat exchanger and stage II plate heat exchanger installed in the cooling skid are symmetrically arranged on the skid body and connected in sequence. A water accumulation pan is provided on the upper part of the cooling skid, and the water accumulation pan is located directly below the cooling water tower in the water tower skid I.

[0009] Water tower skid I and water tower skid II each have four cooling water towers.

[0010] The cooling water tower is a square countercurrent combination. A certain height is reserved on the water tower skid base to ensure the air inlet space of the cooling water tower. The cold source water of the cooling water tower is tap water.

[0011] The water tank in the water tank skid is located directly below the cooling water tower of the water tower skid II. The water tank is used to receive the cooling water after cooling down in the cooling water tower for circulation in the entire cooling device. A confluence manifold is fixed on the outer wall of the water tank, which diverts the high-temperature water after heat exchange back to each cooling water tower.

[0012] The sand pump is equipped with a pre-filter, the output end of the pre-filter is connected to the hot inlet end of the first-stage plate heat exchanger, the hot outlet end of the first-stage plate heat exchanger is connected to the hot inlet end of the second-stage plate heat exchanger, and the hot outlet end of the second-stage plate heat exchanger is the outlet of the cooled drilling fluid; the input ends of the two water pumps of the water pump group are connected to the water tank, and the output ends are respectively connected to the cold inlet ends of the first and second-stage plate heat exchangers, and the cold outlet ends of the first and second-stage plate heat exchangers are connected to the junction manifold, the junction manifold and the water inlet of the cooling water tower, as well as the water accumulation tray and the water tank are connected through their own quick-connect pipelines.

[0013] A through hole in the horizontal direction is arranged in the middle of the conical positioning block, and a pin passes through the through hole to fix the cooling skid and the water tank skid.

[0014] The beneficial effect of the present invention is that by reasonably arranging the double water pump group, the two-stage plate heat exchanger in series, 8 cooling water towers and the converging manifold and other components, the whole device has a larger processing capacity and a higher cooling efficiency.

[0015] The small-volume modular skid design reduces the transportation unit and floor space while not exceeding the weight or limit, so that the entire device has the advantages of unified structure, simple maintenance, convenient transportation, and convenient and reliable on-site installation, positioning and connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the modular drilling fluid cooling device of the present invention (side view);

[0017] Figure 2 is a schematic diagram of a modular drilling fluid cooling device of the present invention;

[0018] Figure 3 It is a schematic diagram of the overall structure of the modular drilling fluid cooling device of the present invention (front view);

[0019] Figure 4 It is a schematic diagram of the planar layout of the cooling skid and the water tank skid of the present invention;

[0020] Figure 5 It is a schematic diagram of the quick-connect pipeline of the present invention;

[0021] Figure 6 This is a schematic diagram of the installation position of the corner piece of the skid body of the present invention:

[0022] Figure 7 It is a schematic diagram of the skid body of the present invention being transported by a vehicle using a chassis rotating lock;

[0023] Figure 8 It is a schematic diagram of the bolting operation of the skid body and the chassis vehicle of the present invention;

[0024] In the figure, 1. cooling skid, 2. water tank skid, 3. water tower skid I, 4. water tower skid II, 5. quick-connect pipeline, 6. angle fitting, 7. turn lock, 8. conical positioning block, 9. pin shaft, 101. electric control box, 102. sand pump, 103. water supply pump, 104. filter, 105. water pump group, 106. pipeline assembly, 107. primary plate heat exchanger, 108. secondary plate heat exchanger, 109. water accumulation tray, 201. water tank, 202. confluence manifold, 301. cooling water tower, 501. flange connection, 502. flexible clamp, 503. flexible joint. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present invention.

[0026] like Figure 1 As shown, the present invention provides a modular drilling fluid cooling device, including a cooling skid 1, a water tank skid 2, a water tower skid I 3, a water tower skid II 4 and a quick-connect pipeline 5. The four skids are all designed as frame structures with the same outline dimensions. The four corners of the upper and lower end surfaces are welded with container corner pieces 6 for hoisting and bolting, and meet the same loading and transportation standard requirements; the cooling skid 1 and the water tank skid 2 are positioned in parallel and fixed by a conical positioning block 8 and a pin 9;

[0027] The four container corner fittings on the upper end face of the cooling skid 1 are respectively bolted to the corresponding four container corner fittings on the lower end face of the water tower skid Ⅰ3 through a turn lock 7, and the four container corner fittings on the upper end face of the water tank skid 2 are also respectively bolted to the corresponding four container corner fittings on the lower end face of the water tower skid Ⅱ4 through a turn lock 7; the four skid bodies are stacked and fixed in pairs, the cooling skid 1 and the water tank skid 2 are connected by a quick-connect pipeline 5, and the cooling skid 1 is connected to the water tower skid Ⅰ3 and the water tower skid Ⅱ4 respectively through the quick-connect pipeline; the connection methods of the quick-connect pipeline 5 include flange connection 501, flexible clamp 502 and flexible joint 503, and the quick-connect pipeline 5 is fixed in the water tank during transportation and lifting.

[0028] like Figure 3 , Figure 4 , Figure 5 As shown, the four corners of the corresponding surfaces of the cooling skid 1 and the water tank skid 2 are equipped with conical positioning blocks 8, and the two skids are fixed with pins 9 after being positioned and placed in parallel. The four corner pieces 6 on the upper end surface of the cooling skid 1 are respectively bolted with the four corner pieces 6 on the lower end surface of the water tower skid Ⅰ3 through a rotating lock 7, and the four corner pieces 6 on the upper end surface of the water tank skid 2 are also respectively bolted with the four corner pieces 6 on the lower end surface of the water tower skid Ⅱ4 through a rotating lock 7; the four skids are stacked and fixed in pairs and connected through quick-connect pipelines 5, and the connection methods of the quick-connect pipelines 5 include flange connection 501, flexible clamp 502 and flexible joint 503.

[0029] The cooling skid 1 includes an electric control box 101, a sand pump 102, a water supply pump 103, a filter 104, a water pump group 105, a pipeline assembly 106, a primary plate heat exchanger 107 and a secondary plate heat exchanger 108, which are symmetrically arranged on the skid body and connected in sequence. The water accumulation tray 109 on the upper part of the cooling skid 1 is located directly below the cooling water tower 301 of the water tower skid Ⅰ3.

[0030] like Figure 2 , Figure 3 , Figure 4 As shown, the working principle of the drilling fluid cooling device of the present invention is: the sand pump 102 sucks high-temperature drilling fluid through the pre-filter 104, and the high-temperature drilling fluid is discharged after being cooled by the first and second-stage plate heat exchangers 107 and 108 connected in series for drilling operation; the two water pump groups 105 supply the cold water in the water tank 201 to the first and second-stage plate heat exchangers 107 and 108 respectively. After the cold water exchanges heat with the high-temperature drilling fluid, it enters the 8 cooling water towers 301 on the water tower skid Ⅰ3 and the water tower skid Ⅱ4 respectively through the confluence manifold 202 on the outer wall of the water tank 201. The water entering the water tower skid Ⅱ4 directly flows back to the water tank 201 directly below. The water in the water tower skid Ⅰ3 first flows back to the water accumulation tray 109, and then flows back to the water tank 201 through the quick-connect pipeline 5. The cooling water of the entire device is circulated and used, and the water loss is avoided by the supply of the water supply pump 103.

[0031] like Figure 7, Figure 8 As shown, the four skids of the modular cooling device of the present invention are each an independent transport unit and meet the same loading and transportation standard requirements. When transported by vehicle, the upper lock buckle is rotated by turning the lock handle to be tightly hooked with the lock hook to achieve locking.

[0032] Example:

[0033] The present invention realizes easy assembly by rationally setting up a skid body with consistent outer contour dimensions and a frame-type structure, while satisfying the circulation of a large amount of coolant. The components such as a double water pump group, a two-stage plate heat exchanger in series, 8 cooling water towers and a converging manifold enable the entire device to have a larger processing capacity and higher cooling efficiency.

[0034] The small-volume modular skid design reduces the transportation unit and floor space while not exceeding the weight or limit, so that the entire device has the advantages of unified structure, simple maintenance, convenient transportation, and convenient and reliable on-site installation, positioning and connection.

Claims

1. A modular drilling fluid cooling device, characterized in that: It comprises a cooling skid (1), a water tank skid (2), a water tower skid I (3), a water tower skid II (4) and a quick-connect pipeline (5); the four skids are all designed as frame-type structures, have the same outline dimensions, and are welded with container corner pieces (6) at the four corners of the upper and lower end faces for lifting and bolting; the cooling skid (1) and the water tank skid (2) are positioned and placed in parallel and fixed by means of a conical positioning block (8) and a pin shaft (9); The four container corner fittings on the upper end face of the cooling skid (1) are respectively bolted to the four container corner fittings (6) on the lower end face of the water tower skid I (3) via a rotating lock (7); the four container corner fittings on the upper end face of the water tank skid (2) are also respectively bolted to the four container corner fittings on the lower end face of the water tower skid II (4) via a rotating lock (7); the four skid bodies are stacked and fixed in pairs; the cooling skid (1) and the water tank skid (2) are connected via a quick-connect pipeline (5); the cooling skid (1) is respectively connected to the water tower skid I (3) and the water tower skid II (4) via the quick-connect pipeline; the quick-connect pipeline (5) is fixed in the water tank skid (2) during transportation and hoisting; The electric control box (101), sand pump (102), water supply pump (103), pre-filter (104), water pump group (105), pipeline assembly (106), primary plate heat exchanger (107) and secondary plate heat exchanger (108) arranged in the cooling skid (1) are symmetrically arranged on the skid body and are connected in sequence. A water accumulation tray (109) is arranged on the upper part of the cooling skid (1), and the water accumulation tray (109) is located directly below the cooling water tower (301) in the water tower skid I (3); The water tower skid I (3) and the water tower skid II (4) are both provided with at least four cooling water towers (301); The cooling water tower (301) is in a square countercurrent combination form, and a reserved height of the water tower skid base is provided to ensure air intake space for the cooling water tower (301). The cold source water of the cooling water tower (301) is tap water; The water tank (201) in the water tank skid (2) is located directly below the cooling water tower (301) of the water tower skid II (4), and the water tank (201) is used to receive cooling water after cooling in the cooling water tower (301) for circulation by the entire cooling device; a confluence manifold (202) is fixed to the outer wall of the water tank (201), and the confluence manifold (202) diverts the high-temperature water after heat exchange back to each cooling water tower (301); The sand pump (102) is equipped with a pre-filter (104); the output end of the pre-filter (104) is connected to the hot inlet end of the primary plate heat exchanger (107); the hot outlet end of the primary plate heat exchanger (107) is connected to the hot inlet end of the secondary plate heat exchanger (108); the hot outlet end of the secondary plate heat exchanger (108) is the outlet of the cooled drilling fluid; the input ends of the two water pumps of the water pump group (105) are connected to the water tank (201); the output ends are respectively connected to the cold inlet ends of the primary and secondary plate heat exchangers; the cold outlet ends of the primary and secondary plate heat exchangers are connected to the confluence manifold (202); the confluence manifold (202) is connected to the water inlet of the cooling water tower (301), and the water accumulation tray (109) is connected to the water tank (201) through respective quick-connect pipelines (5).

2. A modular drilling fluid cooling device according to claim 1, characterized in that: A through hole in the horizontal direction is provided in the middle of the conical positioning block (8), and the pin shaft (9) passes through the through hole to fix the cooling skid (1) and the water tank skid (2).

3. A modular drilling fluid cooling device according to claim 1, characterized in that: The connection modes of the quick-connect pipeline (5) include flange connection (501), flexible clamp (502) and flexible joint (503).

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