A double anti-stuck and anti-collision bushing type oil pump

Abstract

The invention discloses a double anti-stuck and anti-collision bushing type oil pump, comprising an oil pumping pipe, a righting collar and a three-stage filter; the oil pumping pipe is arranged in a casing, the upper end of the righting collar is connected to the oil pumping pipe, the lower end of the righting collar is connected to the righting anti-collision body, four righting bodies are arranged in the righting anti-collision body, the righting anti-collision body is connected to an outer sedimentation pipe, the outer sedimentation pipe is connected to a righting drainage sedimentation ring, the righting drainage sedimentation ring is connected to an oil pump barrel, the oil pump barrel is connected to a ball seat and a double-thread joint through an outer thread, the outer thread is connected to a ball seat and a double-thread joint through an outer thread and an outer sedimentation pipe, the ball seat and the double-thread joint are connected to an oil pump base through an inner thread, and the oil pump base is connected to a three-stage filter through a buffer pipe. The oil pump adopts two methods of upper anti-stuck and lower anti-stuck and is provided with anti-collision protection technology. At the same time, the anti-stuck and anti-collision cone provided can also right the oil pump plunger to the center of the oil pump barrel, thereby preventing the oil pump from wearing eccentrically.

Description

Technical Field

[0001] The invention belongs to the technical field of oil production equipment, and in particular relates to a double anti-stuck and anti-collision bushing type oil pump. Background Art

[0002] During the production process of oil wells, pump jams often occur. Pump jams refer to the piston being stuck in the pump barrel and unable to make reciprocating motion, or the piston being unable to enter the pump barrel. The main reasons can be divided into two situations: one is iron filings stuck in the pump. During the well repair operation, the workers use pipe clamps or hydraulic pliers to twist the oil rod or oil pipe. Because high torque is required to rotate the thread, it is very easy to drop iron filings. Once the iron filings fall into the oil pipe, they can only enter the pump barrel. The joint of the pump barrel is funnel-shaped, so the iron filings will naturally fall into the annular groove on the piston of the pump barrel; the second is sediment stuck in the pump. There are many types of sediments. The first is the impurities mainly composed of ferric oxide after the oxidation of the casing wall falling to the bottom of the well. The second is the metal powder produced by the long-term eccentric wear of the oil rod and oil pipe, as well as the mud and sand at the bottom of the well. Various sediments enter the pump barrel together with the oil and are continuously lifted to the ground. Especially when the well is shut down, such as power outage, motor failure, bare rod breakage, broken rod and intermittent production wells, during the well shutdown process, the sediment and iron filings that originally rose with the oil lose the power to rise, and their specific gravity is greater than the oil, so they will naturally sink into the pump barrel and block the pump barrel, causing the pump to get stuck. At present, in order to promote cost reduction and efficiency improvement, various oil fields are vigorously promoting intermittent oil production, and the probability of oil wells getting stuck is relatively high when the well is shut down.

[0003] When lifting and unblocking a stuck pump, if it cannot be unblocked within the specified lifting tonnage, the oil rod needs to be reversed. The oil rod reverse operation is one of the most dangerous underground operations and has major safety hazards. If the tonnage is increased to unblock, the oil pipe may fall into the well and cause an oil well accident. In addition, the pump cannot be drained after it is stuck, which will cause serious environmental pollution and waste of resources. At the same time, many oil pump plungers are damaged due to the broken bare rod or the rod column falling to the bottom of the pump barrel instantly after the rod is broken, which requires pump inspection operations.

[0004] At present, those skilled in the art have adopted the upper anti-stuck technology to solve the above technical problems. However, it only designs the upper anti-stuck technology separately, and does not set the anti-stuck technology of the suction system, nor does it have the anti-collision function, and it cannot be used for oil wells with stuck bottom seals. Because in order to prevent impurities in the oil pipe from entering the pump barrel and causing the pump to get stuck, it only designs the piston cap, but the piston cap is made of general materials, so that the piston cap itself and the oil rod produce impurities due to friction, which causes the pump to get stuck. At the same time, the suction system is not equipped with a filtering protection device, so the suction system has no anti-stuck function, and sand from the bottom layer or impurities can enter the pump barrel and cause the pump to get stuck. At the same time, it does not have a pull rod, which does not play an anti-collision role. That is, it cannot achieve the upper and lower dual anti-stuck or anti-collision functions. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a double anti-stuck and anti-collision bushing type oil pump, which achieves the double anti-stuck or anti-collision effect.

[0006] The present invention is achieved through the following technical solutions:

[0007] A double anti-stuck and anti-collision bushing type oil pump, comprising an oil pumping pipe, a righting coupling and a three-stage filter; the oil pumping pipe is arranged in a casing, the upper end of the righting coupling is connected to the oil pumping pipe through a thread, the lower end of the righting coupling is connected to a righting and anti-collision body through an external thread, four righting bodies are arranged in the righting and anti-collision body, the righting and anti-collision body is connected to an external sedimentation pipe through an internal thread, the external sedimentation pipe is connected to a righting and drainage sedimentation ring through an internal thread, the righting and drainage sedimentation ring is connected to an oil pump barrel through an internal thread, the oil pump barrel is connected to a ball seat and a double-thread joint through an external thread, the ball seat and the double-thread joint are connected to the external sedimentation pipe through an external thread, the ball seat and the double-thread joint are connected to an oil pump base through an internal thread, and the oil pump base is connected to the three-stage filter through a buffer pipe.

[0008] The lower end of the three-stage filter is connected with a sand settling pipe, and a wire plug is arranged below the sand settling pipe.

[0009] The righting section hoop is provided with a cone to prevent hanging or jamming when the pump is started.

[0010] The oil pump barrel is provided with an oil pump plunger, which is connected to a pull rod through an inner thread. The pull rod passes through an anti-stuck and anti-collision cone. A pull rod coupling is installed at the top of the pull rod, and a sucker rod is connected to the pull rod coupling.

[0011] Four straightening bodies are arranged inside the straightening and anti-collision body, and the four straightening bodies are distributed in the four directions of southeast, northwest, northeast and southwest. An anti-stuck and anti-collision cone is arranged on the upper part of the straightening body to drain the oil pipe sediment into the external sedimentation pipe. A circular hole with a diameter of 20 mm is opened in the center of the anti-stuck and anti-collision cone, and the pull rod passes through the circular hole of the anti-stuck and anti-collision cone.

[0012] The pull rod length + plunger length should be smaller than the pump barrel length + straightening body length.

[0013] The straightening, drainage and sedimentation ring is used to straighten the pump barrel of the oil well pump so that it corresponds to the straightening body, and is provided with an annular opening to guide the sediment in the pipe to the external sedimentation pipe.

[0014] The ball seat and the double-wire joint are provided with drainage holes.

[0015] The outer sedimentation tube is made of J55 steel.

[0016] The buffer tube and the inner filter tube of the three-stage filter are integrally formed, wherein a hole is opened in the tube wall at the lower end of the buffer tube to form the inner filter tube of the three-stage filter.

[0017] Compared with the prior art, the present invention has the following beneficial technical effects:

[0018] The double anti-stuck and anti-collision bushing type oil well pump provided by the present invention adopts two methods of upper anti-stuck and lower anti-stuck and is provided with anti-collision protection technology. At the same time, the anti-stuck and anti-collision cone provided can also straighten the oil well pump plunger to the center of the oil well pump barrel, thereby preventing the eccentric wear of the oil well pump. Moreover, an external sedimentation tube made of J55 steel is provided outside the oil well pump barrel, which can precipitate impurities and protect the oil well pump barrel, and plays the role of a bushing. It can be used to seal the upper and lower oil wells and can also be used to seal the lower and upper oil wells. It can be said that this pump can be used in any oil well. At present, in order to promote cost reduction and efficiency improvement, various oil fields vigorously promote intermittent oil production, and the probability of oil wells getting stuck when the wells are shut down is relatively high. Therefore, this patented product will play a greater role in the future.

[0019] The double anti-stuck and anti-collision bushing type oil pump provided by the present invention is provided with an anti-stuck and anti-collision cone, which guides the iron filings and sediments produced in the oil pump pipe to the annular space between the pump barrel of the oil pump and the outer sedimentation pipe, thereby ensuring the normal operation of the oil pump and effectively collecting the iron filings and sediments to avoid pump failure. At the same time, the anti-stuck and anti-collision cone straightens the oil pump plunger to the center of the oil pump barrel, thereby playing an anti-eccentric wear effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic structural diagram of a double anti-stuck and anti-collision bushing type oil well pump provided by the present invention;

[0021] Figure 2 A schematic diagram of the explosion structure of the double anti-stuck and anti-collision bushing type oil pump provided by the present invention.

[0022] Among them, 1 is the oil pump pipe, 2 is the pull rod coupling, 3 is the pull rod, 4 is the righting coupling, 4-1 is the anti-hanging and guiding milling, 5 is the anti-stuck and anti-collision cone, 6 is the righting and anti-collision body, 6-1 is the righting body, 7 is the righting and drainage sedimentation ring, 8 is the oil pump plunger, 9 is the oil pump barrel, 10 is the external sedimentation pipe, 11 is the ball seat and double-thread joint, 12 is the oil pump base, 13 is the buffer pipe, 14 is the three-stage filter, 15 is the sand settling pipe, 16 is the thread plug, and 17 is the oil pump rod. DETAILED DESCRIPTION

[0023] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. 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.

[0024] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] The present invention is further described in detail below through specific implementation examples in conjunction with the accompanying drawings.

[0027] See also Figure 1 to Figure 2 A double anti-stuck and anti-collision bushing type oil pump comprises an oil pumping pipe 1, a straightening collar 4, a three-stage filter 14 and a sand settling pipe 15; the oil pumping pipe 1 is arranged in a casing, the upper end of the straightening collar 4 is connected to the oil pumping pipe 1 through a thread, the lower end of the straightening collar 4 is connected to a straightening and anti-collision body 6 through an external thread, four straightening bodies 6-1 are arranged in the straightening and anti-collision body 6, the straightening and anti-collision body 6 is connected to an external sedimentation pipe 10 through an inner thread, and the outer sedimentation pipe 10 is connected to a straightening drainage sedimentation ring through an inner thread 7 is connected, the straightening drainage sedimentation ring 7 is connected to the oil pump barrel 9 through an inner thread, the oil pump barrel 9 is connected to the ball seat and the double thread joint 11 through an outer thread, the ball seat and the double thread joint 11 are connected to the outer sedimentation tube 10 through an outer thread, the ball seat and the double thread joint 11 are connected to the oil pump base 12 through an inner thread, the oil pump base 12 is connected to the three-stage filter 14 through a buffer tube 13, the lower end of the three-stage filter 14 is connected to a sand settling pipe 15, and a thread plug 16 is arranged below the sand settling pipe 15. The oil pump plunger 8 is arranged in the oil pump barrel 9, the oil pump plunger 8 is connected to the pull rod 3 through an inner thread, the pull rod 3 runs through the anti-stuck and anti-collision cone 5, the top of the pull rod 3 is installed with a pull rod coupling 2, and the pull rod coupling 2 is connected to the oil pump rod 17. Wherein, drainage holes are provided on the ball seat and the double-wire joint 11; and a conical anti-hanging guide milling 4-1 is provided on the righting section hoop 4 to prevent hanging or jamming when starting the pump.

[0028] Four straightening bodies are arranged inside the straightening and anti-collision body 6, and the four straightening bodies are distributed in the four directions of southeast, northwest, northeast and southwest. An anti-stuck and anti-collision cone 5 is arranged on the upper part of the straightening body to drain the oil pipe sediment into the external sedimentation pipe. A circular hole with a diameter of 20 mm is opened in the center of the anti-stuck and anti-collision cone 5, and the pull rod 3 passes through the circular hole of the anti-stuck and anti-collision cone 5.

[0029] Specifically, the tie rod length + plunger length should be less than the pump barrel length + straightening body length. The straightening drainage settling ring 7 is used to straighten the pump barrel of the oil well pump to correspond to the straightening body, and an annular opening is provided to guide the sediment in the pipe to the outer settling pipe.

[0030] It should be noted that the buffer tube 13 and the inner filter tube of the three-stage filter 14 are integrally formed, wherein the lower end of the buffer tube 13 is provided with a hole in the tube wall to form the inner filter tube of the three-stage filter 14. Alternatively, a three-stage filter 14 is installed below the buffer tube 13 to prevent impurities from entering the pump barrel and causing the pump to get stuck.

[0031] Specifically, the double anti-stuck and anti-collision bushing type oil pump provided by the present invention comprises an oil pumping pipe 1, a straightening collar 4, a three-stage filter 14 and a sand settling pipe 15; the oil pumping pipe 1 arranged in the casing is connected to the straightening collar 4 by a thread, the lower end of the straightening collar 4 is connected to the straightening anti-collision body 6 by an external thread, four straightening bodies are arranged inside the straightening anti-collision body 6, and an inner thread is provided to connect with the outer sedimentation pipe 10, the outer sedimentation pipe 10 is connected with the straightening drainage sedimentation ring 7 by an inner thread, the straightening drainage sedimentation ring 7 is connected with the pump barrel 9 of the oil pump by an inner thread, and the oil pumping pipe 1 is connected with the straightening collar 4 by an inner thread. The oil pump barrel 9 is connected to the ball seat and the double-wire joint 11, the ball seat and the double-wire joint 11 are connected to the external sedimentation tube 10 through the external thread, the ball seat and the double-wire joint 11 are connected to the oil pump base 12 through the internal thread, the oil pump base 12 is connected to the buffer tube 13 through the internal thread, the buffer tube 13 is connected to the tertiary filter 14 through the external thread, the tertiary filter 14 is connected to the sand settling tube 15 coupling through the external thread, the oil pump plunger 8 is connected to the pull rod 3 through the internal thread, the pull rod 3 passes through the anti-stuck and anti-collision cone 5, and the pull rod coupling 2 is connected to the sucker rod 17.

[0032] Among them, four straightening bodies 6-1 are arranged inside the straightening and anti-collision body 6, and the four straightening bodies are distributed in the four directions of southeast, northwest, and northeast. An anti-stuck and anti-collision cone 5 is arranged on the upper part of the straightening body, and a circular hole with a diameter of 20 mm is opened in the center of the anti-stuck and anti-collision cone 5, and the pull rod 3 passes through the circular hole of the anti-stuck and anti-collision cone 5.

[0033] Furthermore, the pull rod coupling is used to connect with the sucker rod. When the rod breaks, the pull rod coupling falls onto the anti-stuck and anti-collision cone and is stuck in four straightening bodies arranged in the straightening and anti-collision body and cannot go down, thereby playing an anti-collision role.

[0034] Furthermore, the anti-stuck and anti-collision cone is used to drain the sediment in the oil pipe to the external sedimentation pipe, and its cone shape makes it easy to drain the sediment. After the rod breaks, the anti-stuck and anti-collision cone falls into the straightening and anti-collision body and gets stuck and cannot go down. At the same time, the pull rod and the oil pump plunger are straightened to the center, which plays a role in preventing eccentric wear of the oil pump. Furthermore, the anti-stuck and anti-collision cone can perform mechanical wax scraping on the oil pipe when the oil rod is lifted during the pump inspection process.

[0035] Among them, the four straightening bodies arranged in the straightening and anti-collision body are located in four diagonal directions, which is convenient for smoothly introducing the oil pump plunger into the pump barrel.

[0036] The external sedimentation tube is not only used to precipitate the impurities isolated by the anti-stuck and anti-collision cones, but also can protect the oil pump barrel from being damaged during pulling, and can also be used as a bushing pump.

[0037] Pumping pipe, used to transport liquid to the wellhead.

[0038] The straightening coupling is used to straighten the pumping pipe and corresponds to the straightening and anti-collision body. It is set in a cone shape to prevent hanging or jamming when starting the pump.

[0039] The straightening and anti-collision body has 4 straightening bodies inside to straighten the plunger to correspond with the pump barrel, so that the plunger can enter the pump barrel smoothly and prevent the oil pump from eccentric wear. At the same time, when the sucker rod breaks, the tie rod coupling falls into the anti-stuck and anti-collision cone and is stuck by the straightening body and cannot fall to the pump base, thereby protecting the plunger from damage.

[0040] The straightening, drainage and sedimentation ring is used to straighten the pump barrel so that it corresponds to the straightening body. It is provided with an annular opening to guide the sediment in the pipe into the external sedimentation pipe.

[0041] The ball seat and double-thread joint are connected to the external sedimentation tube to facilitate the removal of debris when inspecting the pump later.

[0042] Three-stage filter: A three-stage filter device is used to prevent impurities from entering the pump barrel and causing the pump to get stuck.

[0043] The sand settling tube is used to settle the debris precipitated by the tertiary filtration.

[0044] It should be noted that the external sedimentation tube is made of J55 steel.

[0045] The double anti-stuck and anti-collision bushing type oil pump provided by the present invention is provided with an anti-stuck and anti-collision cone, which guides the iron filings and sediments produced in the oil pump pipe to the annular space between the pump barrel of the oil pump and the outer sedimentation pipe, thereby ensuring the normal operation of the oil pump and effectively collecting the iron filings and sediments to avoid pump failure. At the same time, the anti-stuck and anti-collision cone straightens the oil pump plunger to the center of the oil pump barrel, thereby playing an anti-eccentric wear effect.

[0046] At the same time, by setting the tie rod length + the oil pump plunger length to be smaller than the pump barrel length + the straightening body length, this prevents the rod column from breaking and falling to the bottom of the pump barrel instantly, causing damage to the plunger and leading to pump inspection operations, increasing well repair costs and reducing oil well recovery rates.

[0047] Furthermore, the suction system adopts three-stage filtration to effectively prevent sand and other sediments from the bottom layer from entering the pump barrel and causing the pump to get stuck.

[0048] Furthermore, an external sedimentation tube made of J55 steel is arranged outside the pump barrel of the oil pump, which can precipitate impurities and protect the pump barrel of the oil pump. The oil pump will not be damaged due to collision during the pulling process, and it plays the role of a bushing. It can be used to seal the oil wells under production, and can also be used to seal the oil wells under production. It can be said that this pump can be used in any oil well and there will be no need for pump inspection due to pump jam.

[0049] Furthermore, when the oil well is scheduled for pump inspection, only the internal oil well pump barrel and plunger need to be replaced, and the inspection cost is low.

[0050] Furthermore, the tail pipe is replaced by the buffer pipe, thereby saving the cost of the tail pipe.

[0051] The double anti-stuck and anti-collision bushing type oil well pump provided by the present invention adopts two methods of upper anti-stuck and lower anti-stuck and is provided with anti-collision protection technology. At the same time, the anti-stuck and anti-collision cone provided can also straighten the oil well pump plunger to the center of the oil well pump barrel, thereby preventing the eccentric wear of the oil well pump. Moreover, an external sedimentation tube made of J55 steel is provided outside the oil well pump barrel, which can precipitate impurities and protect the oil well pump barrel, and plays the role of a bushing. It can be used to seal the upper and lower oil wells and can also be used to seal the lower and upper oil wells. It can be said that this pump can be used in any oil well. At present, in order to promote cost reduction and efficiency improvement, various oil fields vigorously promote intermittent oil production, and the probability of oil wells getting stuck when the wells are shut down is relatively high. Therefore, this patented product will play a greater role in the future.

[0052] The double anti-stuck and anti-collision bushing type oil well pump provided by the present invention is provided with upper and lower anti-stuck protection technology and has an added anti-collision function. An external sedimentation tube made of J55 steel is also provided outside the pump barrel of the oil well pump, which can not only precipitate impurities but also protect the oil well pump barrel and play the role of a bushing. It can be used to seal the upper well and produce the lower well, or to seal the lower well and produce the upper well. It can be said that this pump can be used in any oil well. If this oil well pump is installed, there will be no pump inspection operation due to pump jam. When the oil well is planned to inspect the pump, it is only necessary to replace the pump barrel and the plunger, and the pump inspection cost is low. The external protection device can also match the whole barrel pump currently used.

[0053] The double anti-stuck and anti-collision bushing type oil pump provided by the present invention solves the problem of oil pump sticking, has a more reliable anti-stuck effect, can play a double anti-stuck and anti-collision protection role at the top and bottom, and has three-level filtering and anti-collision functions. When the planned pump inspection time comes, the oil pump barrel and plunger can be directly replaced without purchasing the entire pump, which is a low replacement cost.

[0054] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A double anti-stuck and anti-collision bushing type oil pump, characterized in that: The invention comprises an oil pumping pipe (1), a righting collar (4) and a three-stage filter (14); the oil pumping pipe (1) is arranged in a casing, the upper end of the righting collar (4) is connected to the oil pumping pipe (1) through a thread, the lower end of the righting collar (4) is connected to a righting anti-collision body (6) through an external thread, four righting bodies (6-1) are arranged in the righting anti-collision body (6), the righting anti-collision body (6) is connected to an external sedimentation pipe (10) through an internal thread, the external sedimentation pipe (10) is connected to a righting drainage sedimentation ring (7) through an internal thread, and the righting drainage sedimentation ring (7) is connected to a pump barrel (9) of an oil pump through an internal thread. The pump barrel (9) of the oil well pump is connected to the ball seat and the double thread joint (11) through an external thread, the ball seat and the double thread joint (11) are connected to the external sedimentation pipe (10) through an external thread, the ball seat and the double thread joint (11) are connected to the oil well pump base (12) through an internal thread, and the oil well pump base (12) is connected to the three-stage filter (14) through a buffer pipe (13); the lower end of the three-stage filter (14) is connected to a sand settling pipe (15), and a thread plug (16) is arranged below the sand settling pipe (15); the righting hoop (4) is provided with a conical anti-hanging guide milling (4- 1); the straightening and anti-collision body (6) is provided with four straightening bodies inside, and the four straightening bodies are distributed in the four directions of southeast, northwest, northeast and southwest. The upper part of the straightening body is provided with an anti-stuck and anti-collision cone (5) for draining the oil pipe sediment into the external sedimentation pipe. The center of the anti-stuck and anti-collision cone (5) is provided with a circular hole with a diameter of 20 mm, and the pull rod (3) passes through the circular hole of the anti-stuck and anti-collision cone (5); the length of the pull rod + the length of the plunger should be less than the length of the pump barrel + the length of the straightening body; the ball seat and the double-wire joint (11) are provided with drainage holes; the pump barrel (9) of the oil pump is provided with an oil pump plunger (8), and the oil pump The pump plunger (8) is connected to the tie rod (3) through an internal thread, the tie rod (3) passes through the anti-stuck and anti-collision cone (5), a tie rod coupling (2) is installed on the top of the tie rod (3), and a sucker rod (17) is connected to the tie rod coupling (2); the buffer tube (13) and the inner filter tube of the three-stage filter (14) are integrally formed, wherein a hole is opened in the tube wall at the lower end of the buffer tube (13) to form the inner filter tube of the three-stage filter (14); the straightening and drainage sedimentation ring (7) is used to straighten the pump barrel of the oil pump to correspond to the straightening body, and an annular opening is provided to guide the sediment in the tube to the outer sedimentation tube.

2. The double anti-stuck and anti-collision bushing type oil pump according to claim 1, characterized in that: The outer sedimentation tube is made of J55 steel.

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