Automatic dredging and cleaning device for oil and gas wellhead

Abstract

The invention relates to the technical field of oil and gas well mouth dredging, in particular to an oil and gas well mouth automatic dredging and cleaning device which comprises an oil and gas production well and a connecting pipe, the lower end of the oil and gas production well is fixedly connected with the connecting pipe, an anti-blocking mechanism is arranged in the connecting pipe, and a flow guide mechanism is arranged on the inner side of the connecting pipe; and the anti-blocking mechanism comprises a supporting frame, a servo motor, a first screw rod, a movable ring, a first connecting piece, a first filtering plate, a second filtering plate and a convex block, and a connecting assembly is arranged at the bottom of the first screw rod. By means of the anti-blocking mechanism, a servo motor is started to rotate, a movable ring pushes a first connecting piece to drive a first filter plate to move downwards to be attached to a second filter plate, at the moment, a protruding block at the lower end of the first filter plate is inserted into a filter hole of the second filter plate, the interior of the filter hole is kept clean and not blocked, operation is easy and convenient, and practicability is high. The trouble that the whole connecting pipe is detached for clearing the blockage problem is avoided, and the influence of impurities on normal use of the oil and gas wellhead is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas wellhead dredging, in particular to an automatic dredging and cleaning device for an oil and gas wellhead. Background Art

[0002] The sources of oil and gas production in oil and gas fields in countries around the world are single wells or cluster well groups. Underground oil (gas) reaches the ground through oil (gas) trees, and is then sent to downstream production units after pre-separation and gathering stations.

[0003] When transporting fluids, pipes are prone to blockage. It is very troublesome to clear the pipes after blockage, which seriously affects the maintenance and production operations of wellhead equipment. The pipes need to be disassembled as a whole. For the increasing number of unattended oil and gas production wells in major oil and gas fields, wellhead blockage is a major safety hazard.

[0004] The existing wellhead is blocked, which generally requires staff to clean it regularly. Due to the harsh working environment, it is inconvenient for staff to operate and the frequency of cleaning is relatively high, which invisibly increases the work intensity of the staff. In addition, the smell is very unpleasant during cleaning, which affects the physical and mental health of the staff. For this reason, we propose an automatic dredging and cleaning device for oil and gas wellheads to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide an automatic dredging and cleaning device for an oil and gas wellhead to solve the problem in the above-mentioned background technology that blockage seriously affects the maintenance and production operation of the wellhead device, requires the overall disassembly of the pipeline, increases the workload of the staff, and poses a safety hazard.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an automatic dredging and cleaning device for oil and gas wellheads, comprising an oil and gas production well and a connecting pipe, wherein the lower end of the oil and gas production well is fixedly connected with the connecting pipe, an anti-blocking mechanism is arranged in the connecting pipe, and a flow guide mechanism is arranged inside the connecting pipe;

[0007] The anti-clogging mechanism includes a support frame, a servo motor, a first screw, a movable ring, a first connecting piece, a first filter plate, a second filter plate and a protrusion. The support frame is arranged on the inner side of the connecting tube, and the servo motor is arranged in the support frame. The lower end of the servo motor is arranged with a first screw, the outer side of the first screw is arranged with a movable ring, the lower end of the movable ring is arranged with a first connecting piece, the lower end of the first connecting piece is arranged with a first filter plate, the inner side of the connecting tube is arranged with a second filter plate, and a protrusion is arranged on the side opposite to the first filter plate and the second filter plate, and a connecting component is arranged at the bottom of the first screw.

[0008] Preferably, the guide mechanism includes a second connecting member, a connecting bearing, a connecting rod and guide vanes. A second connecting member is provided on the lower side of the second filter plate. A connecting bearing is fixedly connected to the inner side of the bottom of the second connecting member. A connecting rod is fixedly connected to the inner side of the connecting bearing. The connecting rod is rotatably connected to the second connecting member through the connecting bearing. Three groups of guide vanes are fixedly connected to the outer surface of the connecting rod in an annular manner with equal intervals.

[0009] Preferably, the servo motor is fixedly installed in the support frame, the upper end of the first screw is fixedly connected to the servo motor, the inner side of the movable ring is provided with a thread compatible with the first screw, the upper end of the first connecting piece is rotatably connected with the movable ring, the lower end of the first connecting piece is fixedly connected to the first filter plate, the outer side of the second filter plate is fixedly connected to the inner wall of the connecting pipe, the surfaces of the first filter plate and the second filter plates on opposite sides are annularly equidistantly fixed with protrusions, the first filter plate and the second filter plate are provided with filter holes, the positions of the filter holes are staggered, the protrusions on the surface of the second filter plate are consistent with the positions of the filter holes opened in the first filter plate, and the protrusions on the surface of the first filter plate are consistent with the positions of the filter holes opened in the second filter plate.

[0010] Preferably, the connecting assembly includes a second screw, a movable block, a clamping block, a baffle and a limit plate, the lower end of the first screw is fixedly connected to the second screw, the outer side of the second screw is threadedly connected to the movable block, the lower end of the movable block is annularly and equidistantly fixedly connected to the clamping block, the upper surface of the inner ring of the connecting bearing is equidistantly fixedly connected to the baffle, and the bottom of the second screw is fixedly connected to the limit plate.

[0011] Preferably, a cleaning assembly is provided at the bottom of the second filter plate, and the cleaning assembly includes a connecting ring and a scraper. The bottom of the first screw passes through the outside of the second filter plate and is fixedly connected to the connecting ring. The outer surface of the connecting ring is fixedly connected to the scraper. The cross-section of the scraper is a right-angled trapezoid, and the scraper fits the lower surface of the second filter plate.

[0012] Preferably, a stabilizing component is provided on the outer side of the first filter plate, and the stabilizing component includes a slider and a slide groove. Four groups of sliders are fixedly connected to the outer surface of the first filter plate at equal intervals. A slide groove is provided on the inner wall of the connecting tube located on the upper side of the second filter plate, and the diameter of the slider is adapted to the slide groove.

[0013] Preferably, a liquid flow sensor is fixedly mounted on the inner wall of the connecting pipe located on the upper side of the first filter plate, and the liquid flow sensor is electrically connected to the servo motor.

[0014] Preferably, the movable block is in a concave shape, the diameter of the limiting plate is matched with the inner diameter of the movable block, the clamping block and the blocking piece are in a triangular shape, and the diameters of the clamping block and the blocking piece are consistent.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention provides an anti-clogging mechanism. When the filter ports of the first filter plate and the second filter plate are blocked particularly seriously, the servo motor is started to rotate so that the movable ring pushes the first connecting member to drive the first filter plate to move downward and fit with the second filter plate. At this time, the protrusion at the lower end of the first filter plate is inserted into the filter hole of the second filter plate to keep the filter hole clean and unblocked. The operation is simple and convenient, avoiding the trouble of disassembling the entire connecting pipe to clean the blockage problem, and reducing the influence of impurities on the normal use of the oil and gas wellhead.

[0017] 2. The present invention provides a flow guide mechanism, and when oil and gas flow, the guide vane is rotatably connected to the second connecting member through the connecting bearing, pushing the guide vane to rotate, so that a pressure difference is formed at both ends. The pressure difference drives the liquid in the pipeline to flow, so that impurities in the liquid are discharged, thereby achieving the purpose of unblocking the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic front view of the structure of the present invention;

[0020] Figure 2 It is a structural schematic diagram of the anti-blocking mechanism of the present invention;

[0021] Figure 3 It is a structural schematic diagram of the cleaning component of the present invention;

[0022] Figure 4 It is a structural schematic diagram of the flow guiding mechanism of the present invention;

[0023] Figure 5 For the present invention Figure 3 A is a partial enlarged schematic diagram;

[0024] Figure 6 For the present invention Figure 4 A partial enlarged schematic diagram of B in the figure.

[0025] In the figure: 1. oil and gas production well; 2. connecting pipe; 3. anti-clogging mechanism; 301. support frame; 302. servo motor; 303. first screw; 304. movable ring; 305. first connecting piece; 306. first filter plate; 307. second filter plate; 308. bump; 4. flow guide mechanism; 41. second connecting piece; 42. connecting bearing; 43. connecting rod; 44. guide vane; 5. cleaning assembly; 51. connecting ring; 52. scraper; 6. connecting assembly; 61. second screw; 62. movable block; 63. block; 64. baffle; 65. limit plate; 7. stabilizing assembly; 71. slider; 72. slideway; 8. liquid flow sensor. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figure 1-6 , an embodiment provided by the present invention: an automatic dredging and cleaning device for oil and gas wellheads, comprising an oil and gas production well 1 and a connecting pipe 2, the lower end of the oil and gas production well 1 is fixedly connected to the connecting pipe 2, an anti-blocking mechanism 3 is arranged in the connecting pipe 2, and a flow guide mechanism 4 is arranged inside the connecting pipe 2;

[0028] The anti-clogging mechanism 3 includes a support frame 301, a servo motor 302, a first screw 303, a movable ring 304, a first connecting piece 305, a first filter plate 306, a second filter plate 307 and a protrusion 308. The support frame 301 is arranged on the inner side of the connecting tube 2, the servo motor 302 is arranged in the support frame 301, the first screw 303 is arranged at the lower end of the servo motor 302, the movable ring 304 is arranged on the outer side of the first screw 303, the first connecting piece 305 is arranged at the lower end of the movable ring 304, the first filter plate 306 is arranged at the lower end of the first connecting piece 305, the second filter plate 307 is arranged on the inner side of the connecting tube 2, the protrusion 308 is arranged on the side opposite to the first filter plate 306 and the second filter plate 307, and the connection component 6 is arranged at the bottom of the first screw 303;

[0029] The device solves the problem that the wellhead device maintenance and production operation are seriously affected by the blockage by setting the anti-blockage mechanism 3, the pipeline needs to be disassembled as a whole, the work intensity of the staff is increased, and the wellhead blockage poses a safety hazard.

[0030] Furthermore, the flow guide mechanism 4 includes a second connecting member 41, a connecting bearing 42, a connecting rod 43 and a guide vane 44. The second connecting member 41 is provided on the lower side of the second filter plate 307. The connecting bearing 42 is fixedly connected to the inner side of the bottom of the second connecting member 41. The connecting rod 43 is fixedly connected to the inner side of the connecting bearing 42. The connecting rod 43 is rotatably connected to the second connecting member 41 through the connecting bearing 42. The outer surface of the connecting rod 43 is annularly and equidistantly fixedly connected with three groups of guide vanes 44. Figure 4 As shown, the structure is used to drive the guide vane 44 through the flow of liquid to drive the connecting rod 43, which rotates under the action of the rotational connection between the connecting bearing 42 and the second connecting member 41, thereby guiding the liquid and accelerating the flow of the liquid, allowing impurities in the liquid to pass quickly.

[0031] Furthermore, the servo motor 302 is fixedly installed in the support frame 301, the upper end of the first screw 303 is fixedly connected to the servo motor 302, the inner side of the movable ring 304 is provided with a thread compatible with the first screw 303, the upper end of the first connecting member 305 is rotatably connected to the movable ring 304, the lower end of the first connecting member 305 is fixedly connected to the first filter plate 306, the outer side of the second filter plate 307 is fixedly connected to the inner wall of the connecting pipe 2, the surfaces of the first filter plate 306 and the second filter plate 307 on the opposite sides are annularly equidistantly fixed with protrusions 308, the first filter plate 306 and the second filter plate 307 are provided with filter holes, the positions of the filter holes are staggered, the protrusions 308 on the surface of the second filter plate 307 are consistent with the positions of the filter holes provided in the first filter plate 306, and the protrusions 308 on the surface of the first filter plate 306 are consistent with the positions of the filter holes provided in the second filter plate 307. Figure 2 As shown, the structure is used to drive the first screw 303 to rotate through the servo motor 302, so that the movable ring 304 drives the first connecting member 305 and the first filter plate 306 to move downward, so that the first filter plate 306 and the second filter plate 307 are fitted together. When fitting together, the protrusions 308 on the surface of the second filter plate 307 are inserted into the filter holes of the first filter plate 306, and the protrusions 308 on the surface of the first filter plate 306 are inserted into the filter holes of the second filter plate 307, so as to clean the filter holes and avoid impurities from accumulating in the filter holes, causing the filter holes to be blocked, affecting the flow rate of the liquid, and thus affecting the production efficiency.

[0032] Furthermore, the connection assembly 6 includes a second screw 61, a movable block 62, a clamping block 63, a baffle 64 and a limit plate 65. The lower end of the first screw 303 is fixedly connected to the second screw 61, the outer side of the second screw 61 is threadedly connected to the movable block 62, the lower end of the movable block 62 is annularly fixedly connected to the clamping block 63 at equal intervals, the upper surface of the inner ring of the connecting bearing 42 is fixedly connected to the baffle 64 at equal intervals, and the bottom of the second screw 61 is fixedly connected to the limit plate 65. Figure 6As shown, the structure is used to drive the second screw rod 61 to rotate through the first screw rod 303, so that the movable block 62 outside the second screw rod 61 moves downward. When the movable block 62 moves downward, the block 63 at the lower end abuts against the baffle 64 at the top of the connecting bearing 42, driving the connecting rod 43 and the guide vane 44 to rotate, thereby accelerating the rotation speed of the connecting rod 43 and the guide vane 44 and achieving the purpose of unblocking the pipeline.

[0033] Furthermore, a cleaning assembly 5 is provided at the bottom of the second filter plate 307. The cleaning assembly 5 includes a connecting ring 51 and a scraper 52. The bottom of the first screw 303 passes through the outside of the second filter plate 307 and is fixedly connected to the connecting ring 51. The lower end of the connecting ring 51 is provided with a second connecting member 41. The outer surface of the connecting ring 51 is fixedly connected to the scraper 52. The cross section of the scraper 52 is a right-angle trapezoid. The scraper 52 fits the lower surface of the second filter plate 307. Figure 3 As shown, the structure is used to drive the connecting ring 51 and the scraper 52 to rotate through the first screw 303, so as to scrape off the impurities attached to the lower surface of the second filter plate 307, thereby improving the cleaning effect.

[0034] Furthermore, a stabilizing assembly 7 is provided on the outer side of the first filter plate 306, and the stabilizing assembly 7 includes a slider 71 and a slide groove 72. Four sets of sliders 71 are fixedly connected to the outer surface of the first filter plate 306 at equal intervals. The inner wall of the connecting pipe 2 is located on the upper side of the second filter plate 307 and is provided with a slide groove 72. The diameter of the slider 71 is adapted to the slide groove 72. Figure 5 As shown, the structure is used to move the first filter plate 306 downward along the slide groove 72 with the help of the slider 71, so that the first filter plate 306 drops vertically, avoiding the position of the first filter plate 306 from being offset, and improving the stability of the device.

[0035] Furthermore, a liquid flow sensor 8 is fixedly mounted on the inner wall of the connecting pipe 2 located on the upper side of the first filter plate 306, and the liquid flow sensor 8 is electrically connected to the servo motor 302. Figure 2 As shown, the structure is used to electrically connect to the servo motor 302 through the liquid flow sensor 8. When the liquid flow sensor 8 detects that the liquid flow rate is lower than the average flow rate, a signal is sent to the servo motor 302 and the staff is reminded. The servo motor 302 operates after receiving the signal to improve the dredging effect of the device.

[0036] Furthermore, the movable block 62 is concave in shape, the diameter of the limiting plate 65 is adapted to the inner diameter of the movable block 62, the clamping block 63 and the baffle 64 are triangular in shape, and the diameters of the clamping block 63 and the baffle 64 are consistent. Figure 6As shown, the structure is used to form a triangle through the block 63 and the baffle 64. When the movable block 62 descends, the contact point between the block 63 and the baffle 64 is small, so that the block 63 at the bottom can push the baffle 64 to rotate along the direction of the baffle 64 to avoid interference.

[0037] Working principle: When used, Figure 1 As shown, when the liquid flow sensor 8 detects that the liquid flow rate is lower than the average flow rate, a signal is sent to the servo motor 302 to remind the staff, and the servo motor 302 operates after receiving the signal, such as Figure 2 and Figure 5 As shown, the servo motor 302 drives the first screw 303 to rotate, so that the movable ring 304 drives the first connecting member 305 and the first filter plate 306 to move downward, and the first filter plate 306 moves downward along the slide groove 72 with the help of the slider 71, so that the first filter plate 306 drops vertically to avoid the position of the first filter plate 306 from being offset, so that the first filter plate 306 and the second filter plate 307 are fitted together. When fitting together, the protrusions 308 on the surface of the second filter plate 307 are inserted into the filter holes of the first filter plate 306, and the protrusions 308 on the surface of the first filter plate 306 are inserted into the filter holes of the second filter plate 307, so that the filter holes are cleaned to avoid impurities accumulating at the filter holes and causing blockage of the filter holes, as shown in FIG. Figure 3 As shown, the first screw 303 rotates while driving the connecting ring 51 and the scraper 52 to rotate, and the impurities attached to the lower surface of the second filter plate 307 are scraped off to improve the cleaning effect. Figure 6 As shown, the first screw rod 303 drives the second screw rod 61 to rotate, so that the movable block 62 outside the second screw rod 61 moves downward. When the movable block 62 moves downward, the block 63 at the lower end abuts against the baffle 64 at the top of the connecting bearing 42, driving the connecting rod 43 and the guide vane 44 to rotate, thereby accelerating the rotation speed of the connecting rod 43 and the guide vane 44 to achieve the purpose of unblocking the pipeline. The above is the entire working principle of the present invention.

[0038] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. An automatic dredging and cleaning device for oil and gas wellheads, comprising an oil and gas production well (1) and a connecting pipe (2), characterized in that: The lower end of the oil and gas production well (1) is fixedly connected to a connecting pipe (2), an anti-blocking mechanism (3) is arranged inside the connecting pipe (2), and a flow guiding mechanism (4) is arranged inside the connecting pipe (2); The anti-blocking mechanism (3) comprises a support frame (301), a servo motor (302), a first screw (303), a movable ring (304), a first connecting piece (305), a first filter plate (306), a second filter plate (307) and a protrusion (308); the support frame (301) is arranged on the inner side of the connecting pipe (2); the servo motor (302) is arranged in the support frame (301); the first screw (303) is arranged at the lower end of the servo motor (302); A movable ring (304) is arranged on the outer side of the first screw rod (303), a first connecting member (305) is arranged at the lower end of the movable ring (304), a first filter plate (306) is arranged at the lower end of the first connecting member (305), a second filter plate (307) is arranged on the inner side of the connecting tube (2), a protrusion (308) is arranged on the opposite side of the first filter plate (306) and the second filter plate (307), and a connecting component (6) is arranged at the bottom of the first screw rod (303).

2. The automatic dredging and cleaning device for oil and gas wellheads according to claim 1 is characterized by: The flow guide mechanism (4) comprises a second connecting member (41), a connecting bearing (42), a connecting rod (43) and guide vanes (44); the second connecting member (41) is arranged on the lower side of the second filter plate (307); the inner side of the bottom of the second connecting member (41) is fixedly connected to the connecting bearing (42); the inner side of the connecting bearing (42) is fixedly connected to the connecting rod (43); the connecting rod (43) is rotatably connected to the second connecting member (41) via the connecting bearing (42); and the outer surface of the connecting rod (43) is annularly and equidistantly fixedly connected with three groups of guide vanes (44).

3. The automatic dredging and cleaning device for oil and gas wellheads according to claim 1 is characterized by: The servo motor (302) is fixedly installed in the support frame (301); the upper end of the first screw rod (303) is fixedly connected to the servo motor (302); the inner side of the movable ring (304) is provided with a thread matched with the first screw rod (303); the upper end of the first connecting member (305) is rotatably connected to the movable ring (304); the lower end of the first connecting member (305) is fixedly connected to the first filter plate (306); the outer side of the second filter plate (307) is fixedly connected to the inner wall of the connecting pipe (2); The surfaces of the first filter plate (306) and the second filter plate (307) on opposite sides are fixedly connected with protrusions (308) in an annular manner and at equal intervals. The first filter plate (306) and the second filter plate (307) are provided with filter holes, and the positions of the filter holes are staggered. The protrusions (308) on the surface of the second filter plate (307) are consistent with the positions of the filter holes provided in the first filter plate (306), and the protrusions (308) on the surface of the first filter plate (306) are consistent with the positions of the filter holes provided in the second filter plate (307).

4. The automatic dredging and cleaning device for oil and gas wellheads according to claim 2 is characterized by: The connection assembly (6) comprises a second screw rod (61), a movable block (62), a clamping block (63), a baffle (64) and a limit plate (65); the lower end of the first screw rod (303) is fixedly connected to the second screw rod (61); the outer side of the second screw rod (61) is threadedly connected to the movable block (62); the lower end of the movable block (62) is annularly and equidistantly fixedly connected to the clamping block (63); the upper surface of the inner ring of the connecting bearing (42) is fixedly connected to the baffle (64) at an equidistant distance; and the bottom of the second screw rod (61) is fixedly connected to the limit plate (65).

5. The automatic dredging and cleaning device for oil and gas wellheads according to claim 1 is characterized by: A cleaning assembly (5) is provided at the bottom of the second filter plate (307), and the cleaning assembly (5) comprises a connecting ring (51) and a scraper (52); the bottom of the first screw rod (303) passes through the outside of the second filter plate (307) and is fixedly connected to the connecting ring (51); the outer surface of the connecting ring (51) is fixedly connected to the scraper (52); the cross section of the scraper (52) is a right-angled trapezoid, and the scraper (52) fits the lower surface of the second filter plate (307).

6. The automatic dredging and cleaning device for oil and gas wellheads according to claim 1 is characterized by: A stabilizing component (7) is arranged on the outer side of the first filter plate (306), and the stabilizing component (7) comprises a slider (71) and a slide groove (72). Four groups of sliders (71) are fixedly connected at equal intervals to the outer surface of the first filter plate (306). A slide groove (72) is provided on the inner wall of the connecting pipe (2) located on the upper side of the second filter plate (307), and the diameter of the slider (71) is adapted to the slide groove (72).

7. The automatic dredging and cleaning device for oil and gas wellheads according to claim 1 is characterized by: A liquid flow sensor (8) is fixedly mounted on the inner wall of the connecting pipe (2) located on the upper side of the first filter plate (306), and the liquid flow sensor (8) is electrically connected to the servo motor (302).

8. The automatic dredging and cleaning device for oil and gas wellheads according to claim 4 is characterized by: The movable block (62) is in a concave shape, the diameter of the limiting plate (65) is adapted to the inner diameter of the movable block (62), the clamping block (63) and the blocking piece (64) are in a triangular shape, and the diameters of the clamping block (63) and the blocking piece (64) are consistent.

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