Storage tank for oil testing and well repairing

Abstract

The utility model discloses a reserve tank for oil testing and well repairing, and relates to the technical field of well drilling corollary equipment. The tank body and the sand pump are assembled on the base, well killing fluid is stored in the tank body, an inlet pipeline and an outlet pipeline of the sand pump are both connected into the tank body, a sand cleaning door is arranged on the side wall of the bottom end of the tank body, a manhole is formed in the top end face of the tank body, a water retaining ring is arranged around the manhole, an inner crawling ladder is arranged in the manhole, and the inner crawling ladder is connected with the sand cleaning door. And a cover plate covers the manhole. The sand cleaning door is arranged on the side wall of the bottom end of the tank body, when sand needs to be cleaned, the sand can be cleaned by opening the sand cleaning door, and inconvenience caused by sand cleaning from the manhole is avoided; the inner crawling ladder is arranged in the manhole, so that workers can conveniently enter and exit from the tank body through the manhole; the water retaining ring is arranged on the periphery of the manhole to prevent rainwater from entering the manhole from the periphery of the manhole on the top end face of the tank body, the cover plate covers the manhole to prevent the rainwater from directly falling into the manhole, and the rainwater is prevented from polluting well killing fluid in the tank body.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling supporting equipment, and more specifically to a storage tank for oil testing and well repairing. Background Art

[0002] The reserve tank for oil testing and well repair is used to store well killing fluid for well repair. The liquid pumped into the wellbore to balance the formation pressure in order to prevent blowout during well repair and well killing operations is collectively called well killing fluid. When repairing and killing oil wells and gas wells, the density of the liquid pumped into the well to prevent blowout accidents needs to be selected according to the reservoir pressure and depth. If the liquid column pressure is too large, it will cause the well killing fluid to be lost and polluted; if it is too small, the blowout cannot be controlled. Generally, the static liquid column pressure should be slightly greater than the reservoir pressure. In order to prevent and reduce the damage of the well killing fluid to the oil layer, additives such as anti-swelling agents and surfactants are sometimes added to it.

[0003] In the prior art, a patent with publication number CN207684208U discloses a liquid chemical material storage tank, which relates to the technical field of liquid transportation devices, including a tank body arranged in a skid-mounted frame, and the tank body is divided into a number of independent isolation chambers by isolation plates; each isolation chamber has an inlet branch and an outlet branch equipped with an on-off valve, and the branches respectively merge into the inlet main pipeline and the outlet main pipeline equipped with an on-off valve, and are connected to the two ends of the sand pump; this liquid chemical material storage tank adopts an operating skid-mounted design, and the internal partitions are independent of each other and can be interconnected through pipelines and valve groups.

[0004] The storage tank disclosed in the above patent has the following defects:

[0005] 1. When it is necessary to clean the sand deposited in the tank, it is necessary to enter through the manhole and perform manual sand cleaning, which is extremely inconvenient.

[0006] 2. Although there is a maintenance manhole, there is no corresponding ladder, which makes it very inconvenient for the staff to enter and exit the tank. At the same time, there is no corresponding cover plate in the maintenance manhole, and rainwater can easily enter the tank and contaminate the well-killing fluid. Utility Model Content

[0007] In order to overcome the defects existing in the above-mentioned prior art, the purpose of the utility model is to provide a reserve tank for oil testing and well repairing, so as to solve the problems existing in the above-mentioned prior art such as inconvenience in sand cleaning, inconvenience in entering and exiting the tank, and rainwater contamination of the well-killing fluid.

[0008] In order to achieve the above objectives, the technical solution adopted by the utility model is:

[0009] A storage tank for oil testing and well repairing, comprising:

[0010] Base;

[0011] A tank body and a sand pump are assembled on the base, the tank body stores well-killing fluid, the inlet pipeline and the outlet pipeline of the sand pump are connected to the tank body, a sand cleaning door is arranged on the side wall of the bottom end of the tank body, a manhole is arranged on the top surface, a water retaining ring is arranged around the manhole, an inner ladder is arranged in the manhole, and a cover plate is arranged on the manhole cover;

[0012] A plurality of respirators mounted on the top surface of the tank body, and a float type liquid level gauge mounted in the tank body for detecting the liquid level of the well-killing fluid in the tank body;

[0013] A top frame is mounted on the top surface of the tank body, and a stirrer is installed on the top frame. The stirring end of the stirrer extends downward into the well-killing fluid in the tank body.

[0014] Preferably, the base includes a base frame made of I-beams and channel steels welded together, a hanging pipe assembled on the base frame, and a stainless steel plate laid on the base frame.

[0015] Preferably, the tank body comprises a bottom plate, a wall plate surrounding the bottom plate, and a top plate covering the top of the wall plate, and the wall plate is a corrugated steel plate, and the corrugation is a straight triangular corrugation.

[0016] Preferably, the sand pump comprises a pump body, a first inlet pipe, a second inlet pipe, a first outlet pipe and a second outlet pipe;

[0017] The inlet end of the pump body is connected to the first inlet pipe and the second inlet pipe respectively, and the outlet end is connected to the first outlet pipe and the second outlet pipe respectively, the first inlet pipe is connected to the bottom end of the tank body, the first outlet pipe is connected to the top end of the tank body, the second inlet pipe and the second outlet pipe extend out of the tank body, and valves are arranged on the first inlet pipe, the second inlet pipe, the first outlet pipe and the second outlet pipe.

[0018] Preferably, the float type liquid level gauge comprises a float, a wire rope, a pulley, a plumb bob and a plumb bob box;

[0019] The float is located on the well-killing fluid surface in the tank body, the two ends of the wire rope are respectively connected to the float and the plumb bob, the wire rope passes through the pulley, the pulley is installed on the top of the tank body, the plumb bob is located in the plumb bob box, and the plumb bob box is installed on the side wall of the tank body.

[0020] Preferably, a vertical scale for displaying the height of the float is also provided on the side wall of the tank body.

[0021] Preferably, the agitator includes a motor, a reducer, a stirring shaft and a stirring impeller, the output end of the motor is connected to the input end of the reducer, the output end of the reducer is connected to the top of the stirring shaft, the stirring shaft extends downward into the well-pressing fluid in the tank body, and the stirring impeller is installed at the bottom of the stirring shaft.

[0022] Preferably, the stirring impeller comprises an upper impeller and a lower impeller, and the diameter of the upper impeller is greater than the diameter of the lower impeller.

[0023] Preferably, a railing is installed on the top frame, and the railing is located around the top surface of the tank body. An external ladder is also provided at one end of the tank body.

[0024] Preferably, an electric control cabinet is provided on the side wall of the tank body, a controller is provided in the electric control cabinet, and the controller is electrically connected to the sand pump and the agitator respectively.

[0025] Beneficial effects of the utility model:

[0026] The utility model provides a storage tank for oil testing and well repairing. A sand cleaning door is arranged on the side wall of the bottom end of the tank body. When sand cleaning is needed, the sand cleaning door can be opened to carry out sand cleaning, thereby avoiding the inconvenience caused by sand cleaning from a manhole. An inner ladder is arranged in the manhole, thereby facilitating the staff to enter and exit the tank body from the manhole. A water retaining ring is arranged around the manhole to prevent rainwater from entering the manhole from around the manhole on the top surface of the tank body. A cover plate is arranged on the manhole cover to prevent rainwater from directly falling into the manhole, thereby avoiding rainwater from contaminating the well-killing fluid in the tank body.

[0027] The utility model provides a storage tank for oil testing and well repairing. The top surface of the tank body is provided with a plurality of respirators to control the opening and closing of gas passages inside and outside the tank body and maintain the pressure balance of the tank body. The float type liquid level gauge is convenient for observing the liquid level state in the tank. The agitator is convenient for agitating the well-killing fluid in the tank body to make the well-killing fluid mixed evenly. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a front view of a storage tank for oil testing and well repairing of the utility model;

[0029] Figure 2 This is a right side view of the storage tank for oil testing and well repairing of the utility model;

[0030] Figure 3 This is a left view of the storage tank for oil testing and well repairing of the utility model;

[0031] Figure 4 It is a top view of the storage tank for oil testing and well repairing of the utility model;

[0032] Figure 5 It is a top view of the base of the utility model (removing the stainless steel plate);

[0033] Reference numerals:

[0034] 1. Base; 11. Base frame; 12. Hoisting pipe; 13. Stainless steel plate; 2. Tank body; 21. Sand cleaning door; 22. Manhole; 23. Internal ladder; 24. Cover plate; 3. Sand pump; 31. Pump body; 32. First inlet pipe; 33. Second inlet pipe; 34. First outlet pipe; 35. Second outlet pipe; 4. Respirator; 5. Float-type liquid level gauge; 51. Float; 52. Wire rope; 53. Pulley; 54. Plumb bob; 55. Plumb bob box; 6. Top frame; 7. Agitator; 71. Motor; 72. Reducer; 73. Agitator shaft; 74. Agitator impeller; 8. Railing; 9. Ladder outside the tank; 10. Electric control cabinet. DETAILED DESCRIPTION

[0035] The concept, specific structure and technical effects of the present invention will be clearly and completely described below in combination with the embodiments and drawings to fully understand the purpose, features and effects of the present invention.

[0036] Example 1

[0037] A storage tank for oil testing and well repair, such as Figure 1-5 As shown, including:

[0038] Base 1;

[0039] A tank body 2 and a sand pump 3 are assembled on a base 1. Well killing fluid is stored in the tank body 2. The inlet and outlet pipelines of the sand pump 3 are connected to the tank body 2. A sand cleaning door 21 is provided on the side wall of the bottom end of the tank body 2. A manhole 22 is provided on the top surface. A water retaining ring is provided around the manhole 22. An inner ladder 23 is provided in the manhole 22. A cover plate 24 is provided on the upper cover of the manhole 22.

[0040] A plurality of respirators 4 mounted on the top surface of the tank body 2, and a float type liquid level meter 5 mounted inside the tank body 2 for detecting the liquid level of the well-killing fluid in the tank body 2;

[0041] A top frame 6 is assembled on the top surface of the tank body 2 , and a stirrer 7 is installed on the top frame 6 . The stirring end of the stirrer 7 extends downward into the well-killing fluid in the tank body 2 .

[0042] In this embodiment, the base 1 is used to support the tank body 2; the tank body 2 is used to store the well-killing fluid; and the sand pump 3 is used to transport related materials. Among them, a sand cleaning door 21 is provided on the side wall of the bottom end of the tank body 2. When sand cleaning is needed, the sand cleaning door 21 can be opened to clean the sand; an internal ladder 23 is provided in the manhole 22, which is convenient for the staff to enter and exit the tank body 2 from the manhole 22; a water retaining ring is provided around the manhole 22 to prevent rainwater from entering the manhole 22 from around the manhole 22 on the top surface of the tank body 2, and a cover plate 24 is provided on the manhole 22 to prevent rainwater from falling directly into the manhole 22, thereby avoiding rainwater from contaminating the well-killing fluid in the tank body 2.

[0043] The respirator 4 is used to control the opening and closing of the gas passages inside and outside the tank body 2 to maintain the pressure balance of the tank body 2; the float type liquid level gauge 5 is used to observe the liquid level status in the tank; the top frame 6 is used to install the agitator 7; the agitator 7 is used to stir the well-killing fluid in the tank body 2 to make the well-killing fluid mixed evenly.

[0044] Example 2

[0045] This embodiment is further described on the basis of embodiment 1. Figure 1 and 5 As shown, the base 1 includes a base frame 11 made of I-beams and channel steels welded together, a hanging pipe 12 assembled on the base frame 11 , and a stainless steel plate 13 laid on the base frame 11 .

[0046] The tank body 2 comprises a bottom plate, a wall plate surrounding the bottom plate, and a top plate covering the top of the wall plate. The wall plate is a corrugated steel plate, and the corrugation is a straight triangular corrugation.

[0047] Example 3

[0048] This embodiment is further described on the basis of embodiment 2. Figure 1 and 2 As shown, the sand pump 3 includes a pump body 31, a first inlet pipe 32, a second inlet pipe 33, a first outlet pipe 34 and a second outlet pipe 35;

[0049] The inlet end of the pump body 31 is connected to the first inlet pipe 32 and the second inlet pipe 33 respectively, and the outlet end is connected to the first outlet pipe 34 and the second outlet pipe 35 respectively. The first inlet pipe 32 is connected to the bottom end of the tank body 2, the first outlet pipe 34 is connected to the top end of the tank body 2, the second inlet pipe 33 and the second outlet pipe 35 extend out of the tank body 2, and valves are provided on the first inlet pipe 32, the second inlet pipe 33, the first outlet pipe 34 and the second outlet pipe 35.

[0050] In this embodiment, by providing the above-mentioned inlet pipe, outlet pipe and valve, the pump body 31 can transport different fluids and perform different working conditions.

[0051] For example, when the first inlet pipe 32 and the first outlet pipe 34 form a passage, the well-killing fluid at the bottom of the tank body 2 can be transported to the top of the tank body 2 through the pump body 31 to fully mix the well-killing fluid; when the first inlet pipe 32 and the second outlet pipe 35 form a passage, the well-killing fluid in the tank body 2 can be transported outward through the pump body 31; when the second inlet pipe 33 and the first outlet pipe 34 form a passage, the external fluid can be transported into the tank body 2 through the pump body 31.

[0052] Example 4

[0053] This embodiment is further described on the basis of embodiment 3. Figure 1 and2 As shown, the float type liquid level gauge 5 includes a float 51, a wire rope 52, a pulley 53, a plumb bob 54 and a plumb bob box 55;

[0054] The float 51 is located on the level of the well-killing fluid in the tank 2, the two ends of the wire rope 52 are respectively connected to the float 51 and the plumb bob 54, the wire rope 52 passes through the pulley 53, the pulley 53 is installed on the top of the tank 2, the plumb bob 54 is located in the plumb bob box 55, and the plumb bob box 55 is installed on the side wall of the tank 2. A vertical scale for displaying the height of the float 51 is also provided on the side wall of the tank 2.

[0055] In this embodiment, a plumb bob-float type liquid level gauge is provided in the tank body, and the float is limited in the tank body by a steel wire rope + plumb bob to prevent the float from drifting in a large range. In addition, in order to facilitate observation of the scale corresponding to the float 51, a vertical transparent window can be provided on the side wall of the tank body 2, so as to facilitate observation of the scale corresponding to the float 51 and obtain the well-killing fluid level in the tank body 2.

[0056] Example 5

[0057] This embodiment is further described on the basis of embodiment 4. Figure 4 As shown, the agitator 7 includes a motor 71, a reducer 72, a stirring shaft 73 and a stirring impeller 74. The output end of the motor 71 is connected to the input end of the reducer 72, and the output end of the reducer 72 is connected to the top of the stirring shaft 73. The stirring shaft 73 extends downward into the well-killing fluid in the tank body 2, and the stirring impeller 74 is installed at the lower part of the stirring shaft 73.

[0058] In this embodiment, the motor 71 rotates at a high speed, and is decelerated by the speed reducer 72, and then drives the stirring shaft 73 and the stirring impeller 74 to rotate, so as to stir the well-killing fluid in the tank body 2, so that the well-killing fluid is mixed evenly. The stirring impeller 74 includes an upper impeller and a lower impeller, and the diameter of the upper impeller is larger than the diameter of the lower impeller. By setting the upper and lower impellers with different inner diameters, the well-killing fluid is mixed more evenly.

[0059] In this embodiment, the main technical parameters are as follows:

[0060] Tank capacity: 47.5m 3 ,Effective volume: 43m 3 ;

[0061] Overall dimensions: 9000*2800*2455 (mm);

[0062] Tank size: 7960*2700*2200 (mm);

[0063] Weight: about 8400 (kg);

[0064] 18.5KW agitator technical parameters:

[0065] (1) Structural type: worm gear;

[0066] (2) Motor power: 18.5kw;

[0067] (3) Motor speed: 1460 rpm;

[0068] (4) Agitator speed: 73 rpm;

[0069] (5) Impeller: The diameter of the large impeller is 960mm, the diameter of the small impeller is 500mm, and the distance between the small impeller and the bottom of the tank is 300mm;

[0070] (6) Installation type: horizontal.

[0071] Example 6

[0072] This embodiment is further described on the basis of embodiment 5. Figure 1-3 As shown, a railing 8 is installed on the top frame 6, and the railing 8 is located around the top surface of the tank body 2. An external tank ladder 9 is also provided at one end of the tank body 2.

[0073] like Figure 1 As shown, an electric control cabinet 10 is arranged on the side wall of the tank body 2, and a controller is arranged in the electric control cabinet 10. The controller is electrically connected to the sand pump 3 and the agitator 7 respectively to control their operation.

[0074] In this embodiment, the tank volume is ≥ 40m 3 To ensure the strength of the tank structure, the bottom frame, tank body and tank corners of the tank need to be strengthened to ensure the full density is 2.5g / cm 3 No deformation after liquid.

[0075] The steel material used for the tank body and accessories is industrial austenitic stainless steel, among which the tank base, ladder and railing are made of 1Cr17Mn6Ni5N (201), and the tank wall panels, bottom plates, seamless pipes, explosion-proof control box body, agitator stirring rod and impeller and base are made of 0Cr18Ni9 (304). The installation parts must have a quality certificate.

[0076] Base: The main frame is made of 20# I-beam, and the other sub-beams are welded with 14# channel steel. A δ8mm thick stainless steel plate made of 304 is laid on it, and a φ108×6mm seamless pipe is used for the hoisting position to penetrate the base for welding. The base frame is fully welded.

[0077] Tank body: The wall panel is made of 6mm corrugated steel plate, the corrugation is a straight triangular corrugation, the corrugation width is 170mm, the depth is 85mm, and the spacing between the two corrugations of the tank wall shall not be greater than 700mm; 100*100*5mm rectangular tubes are used to make reinforcing tie bars in the tank body, and 2 groups are welded on each long side of the tank body, with a spacing of about 3000mm to ensure that the tank body does not deform during use.

[0078] Top frame: The top frame beam is made of rectangular tube 100*100*5mm, and the reinforcement ribs are welded at the corners of the top frame with a spacing of 500mm. The agitator position uses rectangular tube 100*100*5mm as the crossbeam, and the rest of the tank top frame is reinforced with angle steel 50*4, and the top is paved with 5mm thick stainless steel patterned plate.

[0079] A 15kw sand pump is placed on the platform at the front of the tank. The water inlet pipeline of the sand pump is connected vertically with a stainless steel pipe, and the end is sealed with a mask plate to facilitate cleaning the inlet pipeline and connecting external pipelines. The sand pump outlet pipeline enters the reserve tank from the tank surface. A 4-inch pull-rod quick connector is installed on the inlet and outlet pipelines of the sand pump for connection with other equipment. A sand cleaning door is reserved at the rear end of the tank.

[0080] Railings: Railings must be installed around the surface of the storage tank, and two Φ5mm stainless steel chains are used for enclosure at the ladder. The railings of the storage tank are all fixed railings, made of 50*30mm rectangular tubes, and the railing box needs to be welded with skirting. Notches are reserved at the wire rope hanging point to prevent the wire rope from being decompressed and deformed.

[0081] Two 18.5KW horizontal agitators are installed on the tank surface, and the impeller stirring rod is made of 304 stainless steel.

[0082] Two manholes are opened on the tank surface, located at both ends of the tank surface. The size of the manhole is 1000*800mm. The water retaining ring is welded with 40*40mm angle steel around it, and a cover plate is made. There is a ladder at the manhole to facilitate entering and exiting the tank. Four 12″ respirators are installed on the tank surface, distributed at the four corners of the tank surface. The end face of the tank body is equipped with a plumb bob-float type liquid level gauge. The float is limited by a wire rope in the tank to prevent the float from drifting over a large range.

[0083] The ladder is an integral staircase made of stainless steel pipes to increase the contact area between the feet and the steel pipes and reduce the possibility of people sliding outward when going up and down the ladder. The handrail on the tank top cannot exceed the height of the agitator plane.

[0084] The implementation methods of the present invention are described in detail above, but the present invention is not limited to the described embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention, and these equivalents or substitutions are all included in the scope defined by the claims of the present invention.

Claims

1. A storage tank for oil testing and well repair, characterized in that: include: Base (1); A tank body (2) and a sand pump (3) are assembled on the base (1), the tank body (2) stores well-killing fluid, the inlet pipeline and the outlet pipeline of the sand pump (3) are both connected to the tank body (2), a sand cleaning door (21) is provided on the side wall of the bottom end of the tank body (2), a manhole (22) is provided on the top surface, a water retaining ring is provided around the manhole (22), an inner ladder (23) is provided in the manhole (22), and a cover plate (24) is provided on the top cover of the manhole (22); A plurality of respirators (4) mounted on the top surface of the tank body (2), and a float type liquid level meter (5) mounted in the tank body (2) for detecting the liquid level of the well-killing fluid in the tank body (2); A top frame (6) is mounted on the top surface of the tank body (2), and a stirrer (7) is mounted on the top frame (6). The stirring end of the stirrer (7) extends downward into the well-killing fluid in the tank body (2).

2. The storage tank for oil testing and well repairing as claimed in claim 1, characterized in that: The base (1) comprises a base frame (11) made of I-beams and channel steels welded together, a hanging pipe (12) mounted on the base frame (11), and a stainless steel plate (13) laid on the base frame (11).

3. The storage tank for oil testing and well repairing as claimed in claim 1, characterized in that: The tank body (2) comprises a bottom plate, a wall plate surrounding the bottom plate, and a top plate covering the top of the wall plate, wherein the wall plate is a corrugated steel plate, and the corrugation is a straight triangular corrugation.

4. The storage tank for oil testing and well repairing as claimed in claim 1, characterized in that: The sand pump (3) comprises a pump body (31), a first inlet pipe (32), a second inlet pipe (33), a first outlet pipe (34) and a second outlet pipe (35); The inlet end of the pump body (31) is respectively connected to the first inlet pipe (32) and the second inlet pipe (33), and the outlet end is respectively connected to the first outlet pipe (34) and the second outlet pipe (35); the first inlet pipe (32) is connected to the bottom end of the tank body (2), the first outlet pipe (34) is connected to the top end of the tank body (2), the second inlet pipe (33) and the second outlet pipe (35) extend out of the tank body (2), and valves are provided on the first inlet pipe (32), the second inlet pipe (33), the first outlet pipe (34) and the second outlet pipe (35).

5. The storage tank for oil testing and well repairing as claimed in claim 1, characterized in that: The float type liquid level gauge (5) comprises a float (51), a steel wire rope (52), a pulley (53), a plumb bob (54) and a plumb bob box (55); The float (51) is located on the liquid level of the well-killing fluid in the tank body (2). The two ends of the steel wire rope (52) are respectively connected to the float (51) and the plumb bob (54). The steel wire rope (52) passes through the pulley (53). The pulley (53) is installed on the top of the tank body (2). The plumb bob (54) is located in the plumb bob box (55). The plumb bob box (55) is installed on the side wall of the tank body (2).

6. The storage tank for oil testing and well repairing as claimed in claim 5, characterized in that: A vertical scale for displaying the height of the float (51) is also provided on the side wall of the tank body (2).

7. The storage tank for oil testing and well repairing as claimed in claim 1, characterized in that: The stirrer (7) comprises a motor (71), a reducer (72), a stirring shaft (73) and a stirring impeller (74); the output end of the motor (71) is connected to the input end of the reducer (72); the output end of the reducer (72) is connected to the top end of the stirring shaft (73); the stirring shaft (73) extends downward into the well-killing fluid in the tank body (2); and the stirring impeller (74) is mounted at the bottom of the stirring shaft (73).

8. The storage tank for oil testing and well repairing as claimed in claim 7, characterized in that: The stirring impeller (74) comprises an upper impeller and a lower impeller, and the diameter of the upper impeller is greater than the diameter of the lower impeller.

9. The storage tank for oil testing and well repairing as claimed in claim 1, characterized in that: A railing (8) is installed on the top frame (6), and the railing (8) is located around the top surface of the tank body (2). An external ladder (9) is also provided at one end of the tank body (2).

10. The storage tank for oil testing and well repairing as claimed in claim 1, characterized in that: An electric control cabinet (10) is arranged on the side wall of the tank body (2), and a controller is arranged in the electric control cabinet (10). The controller is electrically connected to the sand pump (3) and the stirrer (7) respectively.

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