Anti-wear extra-long oil pump

Abstract

The present invention provides an anti-wear extra-long oil pump, which relates to the technical field of oil extraction equipment, including a plunger device and a pump barrel device; the plunger device is used for moving in the oil extraction channel of the pump barrel device; wherein the pump barrel device includes a pump barrel and an oil pipe; there are at least two pump barrels, and any two pump barrels are connected by an oil pipe. The movement between the plunger and the pump barrel will cause wear, but no wear will be generated between the oil pipe and the plunger device, and since the length of the plunger device is greater than the length of the pump barrel, during use, the plunger device is in contact with the pump barrel for a longer whole-way wear, while the pump barrel is in contact with the plunger device for a shorter intermittent wear, and after use, the wear cycle of the plunger device and the pump barrel can be more evenly met, and the service life of the two is equivalent, and the sealing surface is extended by using the plunger device, so that the service life of the oil pump is longer, and the technical problems of wasting pump barrels and poor economics of the oil pump in the prior art are alleviated.

Description

Technical Field

[0001] The invention relates to the technical field of oil production equipment, in particular to an anti-wear extra-long oil pump. Background Art

[0002] In the process of extracting oil from the strata, mechanical equipment is used to lift the crude oil in the well to the ground. The oil pump is the main oil extraction equipment. The oil pump is a special form of reciprocating pump. The power is transmitted from the ground to the well through the sucker rod, so that the plunger of the oil pump reciprocates up and down, and the crude oil in the oil well is lifted to the ground along the oil pipe. As the depth of oil well extraction increases, the stroke of the oil pump becomes longer and longer. It needs to be explained that the plunger of the oil pump moves up and down in the pump barrel once, which is a stroke. In order to achieve an ultra-long stroke, a long pump barrel needs to be used.

[0003] In order to achieve a long stroke, the oil pump in the prior art needs to be connected with more than 5 pump barrels greater than or equal to 10 meters, and the length of the plunger sealing surface is greater than or equal to 1.5 meters. During use, due to the short length of the plunger, the plunger is in contact with the pump barrel throughout the entire process and wears, while the longer pump barrel is in intermittent contact with the plunger. The pump barrel of the oil pump generally adopts a chrome-plated pump barrel, which has the characteristics of high hardness and wear resistance, while the plunger of the oil pump generally adopts a spray-welded plunger, which has low hardness and is not wear-resistant compared to the pump barrel plunger; it can be seen that the pump barrel is the most valuable part of all the accessories of the oil pump, while the plunger is of lower value.

[0004] However, during the entire process of plunger wear, the plunger may be damaged prematurely due to wear. At this time, the pump barrel can continue to be used, but the damage to the plunger will cause the entire oil pump to be scrapped. Therefore, the oil pump of the prior art wastes the pump barrel, resulting in incomplete use of the oil pump and high cost. Summary of the invention

[0005] The purpose of the present invention is to provide an anti-wear extra-long oil pump to alleviate the technical problems existing in the prior art, such as waste of pump barrels, incomplete use of the oil pump and high cost.

[0006] The present invention provides an anti-wear extra-long oil pump, comprising: a plunger device and a pump barrel device;

[0007] The plunger device is located in the oil extraction channel of the pump barrel device, and the plunger device is used to move along the oil extraction channel of the pump barrel device;

[0008] The pump barrel device includes a pump barrel and an oil pipe; there are at least two pump barrels, any two pump barrels are connected by the oil pipe, and the plunger device and the pump barrel are sealed; the length of any pump barrel is smaller than the length of the plunger device, the length of the oil pipe is smaller than the length of the plunger device, and the inner diameter of the oil pipe is larger than the outer diameter of the plunger device, so that when the plunger device moves to the oil pipe position, there is a gap between the plunger device and the oil pipe.

[0009] In a preferred embodiment of the present invention, the plunger device includes a plunger joint, a first section plunger and a second section plunger; the first section plunger and the second section plunger are connected by the plunger joint, and the plunger joint is used to enable relative deflection between the first section plunger and the second section plunger.

[0010] In a preferred embodiment of the present invention, the length of the first section of the plunger is greater than the length of the second section of the plunger, and the second section of the plunger is located at one end of the pump barrel device close to the bottom of the oil well.

[0011] In a preferred embodiment of the present invention, a through hole is provided at one end of the second plunger, the plunger joint is inserted into the through hole, and a stepped groove is provided on the side wall of the second plunger close to the through hole, one end of the plunger joint is engaged with the stepped groove, and the plunger joint can be deflected in the horizontal direction relative to the stepped groove;

[0012] One end of the plunger joint extending out of the second plunger is threadedly connected to the first plunger.

[0013] In a preferred embodiment of the present invention, the stepped groove of the second plunger is in an arc shape.

[0014] In a preferred embodiment of the present invention, the plunger device further comprises a first control valve and a second control valve;

[0015] The first control valve is located between the plunger joint and the first plunger section, and the first control valve is connected to the first plunger section;

[0016] Two second control valves are provided, one of which is connected to one end of the first section plunger away from the plunger joint, and the other of which is connected to one end of the second section plunger away from the plunger joint.

[0017] Optionally, at least one of the first control valve and the second control valve at the end of the first section plunger away from the plunger joint is retained.

[0018] In a preferred embodiment of the present invention, the length of the pump barrel is smaller than the length of the oil pipe, and the total length of the oil pipe and the adjacent pump barrel is greater than the length of the plunger device.

[0019] In a preferred embodiment of the present invention, a first joint is provided at one end of the oil pipe away from the bottom of the oil well, one end of the pump barrel is inserted into the first joint, and the pump barrel is connected to the first joint by threads;

[0020] The other end of the oil pipe is provided with a threaded section, and the other end of the pump barrel is provided with a second joint. The oil pipe is inserted into the adjacent pump barrel through the threaded section and is threadedly connected with the second joint of the pump barrel.

[0021] In a preferred embodiment of the present invention, one end of the pump barrel inserted into the first joint is tapered.

[0022] In a preferred embodiment of the present invention, it further comprises a fixed valve device;

[0023] The fixed valve device is connected to the pump barrel device located at the bottom of the oil well.

[0024] The invention provides an anti-wear extra-long oil pump, comprising: a plunger device and a pump barrel device; the plunger device is located in the oil pumping channel of the pump barrel device, and the plunger device is used to move along the oil pumping channel of the pump barrel device, so as to utilize the movement of the plunger device to lift the crude oil in the oil well along the oil pipe to the ground; wherein the pump barrel device comprises a pump barrel and an oil pipe; there are at least two pump barrels, and any two pump barrels are connected by an oil pipe, and the plunger device and the pump barrel are sealed; the length of any pump barrel is smaller than the length of the plunger device, the length of the oil pipe is smaller than the length of the plunger device, and the inner diameter of the oil pipe is larger than the outer diameter of the plunger device, so that when the plunger device moves to the oil pipe position, there is a gap between the plunger device and the oil pipe; the plunger device and the pump barrel move through a sealed fit, that is, the movement between the plunger and the pump barrel will produce Wear occurs, but since there is no wear between the oil pipe and the plunger device, and since the length of the plunger device is greater than the length of the pump barrel, and the length of the oil pipe is less than the length of the plunger device, during use, the plunger device can be in contact and wear with the pump barrel for a longer entire process, while the pump barrel can be in contact and wear with the plunger device for a shorter intermittent period due to the indirect setting of the oil pipe. Actual use has proved that the oil pump provided by the present invention can meet the requirements of a more even wear cycle of the plunger device and the pump barrel, and the service life of the two is equivalent. By utilizing the plunger device to extend the sealing surface, the service life of the oil pump is extended, thereby alleviating the technical problems of wasting pump barrels, incomplete use of oil pumps, and high costs in the prior art; since multiple pump barrels can be used, oil production with any stroke can be achieved, thereby achieving ultra-long stroke oil production. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A schematic structural diagram of the initial state of the motion of the wear-resistant extra-long oil well pump provided by an embodiment of the present invention;

[0027] Figure 2 A schematic structural diagram of a first intermediate state of movement of an anti-wear extra-long oil well pump provided by an embodiment of the present invention;

[0028] Figure 3 A schematic structural diagram of a second intermediate state of the anti-wear extra-long oil well pump provided by an embodiment of the present invention;

[0029] Figure 4 A schematic structural diagram of a pump barrel device of an anti-wear extra-long oil well pump provided in an embodiment of the present invention;

[0030] Figure 5 A schematic structural diagram of a split state of a pump barrel device of a wear-resistant extra-long oil well pump provided by an embodiment of the present invention;

[0031] Figure 6 A schematic structural diagram of a plunger device of an anti-wear extra-long oil well pump provided by an embodiment of the present invention;

[0032] Figure 7 A partially enlarged structural schematic diagram of a plunger device of an anti-wear extra-long oil well pump provided by an embodiment of the present invention;

[0033] Figure 8 A schematic structural diagram of a fixed valve device for an anti-wear extra-long oil well pump provided in an embodiment of the present invention.

[0034] Icons: 100-pump barrel device; 101-pump barrel; 102-oil pipe; 103-connector; 200-plunger device; 201-plunger joint; 202-first section plunger; 203-second section plunger; 204-first control valve; 205-second control valve; 206-step groove; 300-fixed valve device. DETAILED DESCRIPTION

[0035] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than 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.

[0036] It should be noted that Figure 1 A schematic structural diagram of the initial state of the motion of the wear-resistant extra-long oil well pump provided by an embodiment of the present invention; Figure 2 A schematic structural diagram of a first intermediate state of movement of an anti-wear extra-long oil well pump provided by an embodiment of the present invention; Figure 3 A schematic diagram of the structure of the second intermediate state of the anti-wear extra-long oil well pump provided by an embodiment of the present invention; wherein: Figure 1 The initial state provided indicates that the plunger device 200 has just completely entered the pump barrel device 100, wherein the plunger device 200 can be in contact with and fit with the pump barrel 101 of the pump barrel device 100 close to the oil well head; Figure 2 The first intermediate state provided is a state in which the plunger device 200 moves along the oil extraction channel of the pump barrel device 100, wherein the end of the plunger device 200 moving toward the bottom of the oil well enters the position of the second pump barrel 101, and at this time, the plunger device 200 enters the position of the first oil pipe 102 at the end close to the oil port; Figure 3 The second intermediate state provided is that the end of the plunger device 200 moving close to the bottom of the oil well enters the position of the second oil pipe 102, and at this time the end of the plunger device 200 close to the oil port enters the position of the second pump barrel 101; in this embodiment, the number of pump barrels 101 and the number of oil pipes 102 can be specifically selected according to different oil well depths.

[0037] like Figure 1-Figure 8 As shown, the present embodiment provides an anti-wear extra-long oil pump, comprising: a plunger device 200 and a pump barrel device 100; the plunger device 200 is located in the oil extraction channel of the pump barrel device 100, and the plunger device 200 is used to move along the oil extraction channel of the pump barrel device 100; the pump barrel device 100 comprises a pump barrel 101 and an oil pipe 102; there are at least two pump barrels 101, and any two pump barrels 101 are connected by the oil pipe 102, and the plunger device 200 and the pump barrel 101 are sealed together; the length of any one pump barrel 101 is less than the length of the plunger device 200, the length of the oil pipe 102 is less than the length of the plunger device 200, and the inner diameter of the oil pipe 102 is greater than the outer diameter of the plunger device 200, so that when the plunger device 200 moves to the position of the oil pipe 102, there is a gap between the plunger device 200 and the oil pipe 102.

[0038] It should be noted that, since the overall structure of the oil pump is cylindrical, the structures of the pump barrel device 100, the oil extraction channel of the pump barrel device 100 and the plunger device 200 are all cylindrical, which will not be described in detail here; in this embodiment, the plunger channel is used as a reciprocating motion path along the oil extraction channel of the pump barrel device 100, and the inner wall of the oil extraction channel of the pump barrel device 100 is tightly fitted with the outer wall of the plunger device 200, thereby ensuring that the plunger device 200 can perform sealed reciprocating motion along the extension direction of the oil extraction channel of the pump barrel device 100; wherein, the pump barrel device 100 is lowered into the oil well along the oil pipe 102, and after the plunger device 200 is connected to the sucker rod, it is lowered along the pump barrel device 100 to the specific position of the oil well to carry out oil production.

[0039] In this embodiment, according to the depth of different oil wells, pump barrel devices 100 of different total lengths are set. In order to meet the length requirement of the pump barrel device 100, multiple pump barrels 101 can be connected with multiple oil pipes 102 in sequence, wherein the pump barrels 101 and the oil pipes 102 are arranged at intervals, that is, any two adjacent pump barrels 101 are connected by an oil pipe 102, wherein an oil pipe 102 is used between two adjacent pump barrels 101 for anti-wear buffering, and the length of the plunger device 200 is respectively greater than that of the pump barrel 1 01 and the length of the oil pipe 102, so that the plunger device 200 can be in contact and wear with the pump barrel 101 over a longer entire distance, while the pump barrel 101 can be in contact and wear with the plunger device 200 over a shorter distance due to the reduced length and the buffering of the oil pipe 102; compared with the contact and wear between the plunger device 200 and the pump barrel 101 throughout the entire distance in the prior art, the service life of the plunger device 200 can be increased, and the service life of the plunger device 200 is made equivalent to that of the pump barrel 101, thereby improving the overall utilization rate of the oil pump.

[0040] The present embodiment provides an anti-wear extra-long oil pump, comprising: a plunger device 200 and a pump barrel device 100; the plunger device 200 is located in the oil pumping channel of the pump barrel device 100, and the plunger device 200 is used to move along the oil pumping channel of the pump barrel device 100, so as to utilize the movement of the plunger device 200 to lift the crude oil in the oil well along the oil pipe 102 to the ground; wherein the pump barrel device 100 comprises a pump barrel 101 and an oil pipe 102; the number of pump barrels 101 is at least two, and any two pump barrels 101 are The plunger device 200 and the pump barrel 101 are connected by the oil pipe 102, and the plunger device 200 and the pump barrel 101 are sealed; the length of any pump barrel 101 is smaller than the length of the plunger device 200, the length of the oil pipe 102 is smaller than the length of the plunger device 200, and the inner diameter of the oil pipe 102 is larger than the outer diameter of the plunger device 200, so that when the plunger device 200 moves to the position of the oil pipe 102, there is a gap between the plunger device 200 and the oil pipe 102; the plunger device 200 and the pump barrel 101 are sealed. Movement, that is, movement between the plunger and the pump barrel 101 will produce wear, but since there is no wear between the oil pipe 102 and the plunger device 200, and since the length of the plunger device 200 is greater than the length of the pump barrel 101, and the length of the oil pipe 102 is less than the length of the plunger device 200, during use, the plunger device 200 can be in contact and wear with the pump barrel 101 for a longer period of time, while the pump barrel 101 can be in contact and wear with the plunger device 200 for a shorter period of time due to the indirect setting of the oil pipe 102. It has been proved through actual use that the oil pump provided in this embodiment can meet the requirements of more even wear cycles of the plunger device 200 and the pump barrel 101, and the service life of the two is equivalent. By utilizing the plunger device 200, the sealing surface is extended, so that the service life of the oil pump is longer, and the technical problems of wasting the pump barrel 101, incomplete use of the oil pump, and high cost in the prior art are alleviated; since multiple pump barrels 101 can be used, oil production with any stroke can be achieved, thereby achieving ultra-long stroke oil production.

[0041] On the basis of the above embodiments, further, in a preferred embodiment of the present invention, the plunger device 200 includes a plunger joint 201, a first section plunger 202 and a second section plunger 203; the first section plunger 202 and the second section plunger 203 are connected by the plunger joint 201, and the plunger joint 201 is used to enable relative deflection between the first section plunger 202 and the second section plunger 203.

[0042] Among them, the first section of the plunger 202 and the second section of the plunger 203 are movably connected through the plunger joint 201. The plunger joint 201 serves as a connecting structure between the first section of the plunger 202 and the second section of the plunger 203. The plunger joint 201 has the function of automatically adjusting the rotation. The plunger joint 201 has a movable connection structure inside. The plunger joint 201 uses the movable connection structure to have an inclined movement mode in the horizontal direction. In other words, the plunger joint 201 can make the first section of the plunger 202 and the second section of the plunger 203 deflect in the vertical direction.

[0043] In this embodiment, since the two adjacent pump barrels 101 are connected by the oil pipe 102, and the inner diameters of the oil pipe 102 and the pump barrel 101 are different, during the installation process of the pump barrel 101 and the oil pipe 102, when the pumping channel formed inside the pump barrel 101 and the oil pipe 102 has a deviation angle at the connection, and when the first section plunger 202 and the second section plunger 203 move to the oil pipe 102, there is a clearance fit between the first section plunger 202 or the second section plunger 203 and the oil pipe 102, so there will be a slight angular deviation during the movement. In order to avoid the first section plunger 20 2 or the second section plunger 203 will interfere when it moves to the connection, and the plunger joint 201 can make the first section plunger 202 and the second section plunger 203 deflect and fit along the deviation angle, that is, the second section plunger 203 will tilt along the deviation angle, and at this time the first section plunger 202 still moves along the vertical direction. When the first section plunger 202 moves to this point, the first section plunger 202 will also deflect and fit along the deviation angle. At this time, the second section plunger 203 is located at the inner wall of the oil pumping channel, and the second section plunger 203 moves vertically again.

[0044] In a preferred embodiment of the present invention, the length of the first section of the plunger 202 is greater than the length of the second section of the plunger 203, and the second section of the plunger 203 is located at one end of the pump barrel device 100 close to the bottom of the oil well.

[0045] In this embodiment, the first section plunger 202 adopts a long plunger, and the second section plunger 203 adopts a short plunger, and the second section plunger 202 serves as the end entering the oil well, and the first section plunger 202 serves as the end close to the oil well mouth, wherein the end of the first section plunger 202 away from the second section plunger 203 is provided with a sucker rod thread, and the first section plunger 202 is connected to the sucker rod through the sucker rod thread.

[0046] In a preferred embodiment of the present invention, the length of the pump barrel 101 is smaller than the length of the oil pipe 102 , and the total length of the oil pipe 102 and the adjacent pump barrel 101 is greater than the length of the plunger device 200 .

[0047] Among them, the first section of the plunger 202 serves as a long plunger, and the length of the first section of the plunger 202 is greater than or equal to the length of the oil pipe 102. Since the first section of the plunger 202 and the second section of the plunger 203 serve as the plunger device 200 to reciprocate along the oil extraction channel of the pump barrel device 100, and there is a gap fit between the oil pipe 102 and the plunger device 200, in order to ensure the sealing continuity during the oil extraction process, when the first section of the plunger 202 or the second section of the plunger 203 is separated from the previous pump barrel 101, it is necessary to ensure that the second section of the plunger 203 or the first section of the plunger 202 can be in sealing contact with the next pump barrel 101, so as to ensure that the oil driven by the plunger device 200 will always be in a sealed state.

[0048] In this embodiment, the pump barrel device 100 is connected in sequence through multiple groups, and each group of pump barrel devices 100 includes a pump barrel 101 and an oil pipe 102, wherein the first section plunger 202 serves as a long plunger and cooperates with the pump barrel 101 of the first group of pump barrel devices 100 for sealing, and the sealing section is the length of the short pump barrel 101, and the part of the first section plunger 202 that exceeds the pump barrel 101 and the second section plunger 203 are not sealed in the oil pipe 102; when the plunger device 200 moves to the point where the second section plunger 203 is about to enter the second group of pump barrel devices 100, the excess part of the first section plunger 202 is in the pump barrel 101 of the first group of pump barrel devices 100, and cooperates with the pump barrel 101 for sealing; synchronously, the second section plunger 203 is sealed and connected to the pump barrel 101 of the second group of pump barrel devices 100.

[0049] In a preferred embodiment of the present invention, a through hole is provided at one end of the second section plunger 203, the plunger joint 201 is inserted in the through hole, and a stepped groove 206 is provided on the side wall of the second section plunger 203 close to the through hole, one end of the plunger joint 201 is clamped with the stepped groove 206, and the plunger joint 201 can be deflected in the horizontal direction relative to the stepped groove 206; the plunger joint 201 extends out of one end of the second section plunger 203 and is threadedly connected to the first section plunger 202.

[0050] In this embodiment, the plunger joint 201 is in a T-shaped structure, wherein the plunger joint 201 clamps the T-shaped end in the stepped groove 206 of the second plunger 203, and the outer diameter of the T-shaped end of the plunger joint 201 is smaller than the inner diameter of the stepped groove 206, and the outer diameter of the through hole where the plunger joint 201 extends out of the second plunger 203 is also smaller than the inner diameter of the through hole. Therefore, when the plunger joint 201 abuts against the stepped groove 206 in the vertical direction, the plunger joint 201 has a deflection and tilting movement space in the horizontal direction; since the plunger joint 201 moves along with the first plunger 203, the plunger joint 201 can move horizontally. 2 and the second section of the plunger 203 move along the oil extraction channel of the pump barrel device 100. Therefore, when the first section of the plunger 202 is interfered by the inner wall of the oil extraction channel, the deflection force it receives is transmitted to the plunger joint 201. The plunger joint 201 is tilted and deflected relative to the through hole and the stepped groove 206 of the second section of the plunger 203 according to the direction of the deflection force. Then, the plunger joint 201 can adjust the relative deflection between the first section of the plunger 202 and the second section of the plunger 203 in the vertical direction, so that the first section of the plunger 202 and the second section of the plunger 203 are set at an angle.

[0051] In order to make the plunger joint 201 smoother when tilting and deflecting, and to avoid collision and interference between the plunger joint 201 and the side wall of the step groove 206 of the second section plunger 203, in a preferred embodiment of the present invention, the step groove 206 of the second section plunger 203 is arc-shaped; the arc-shaped step groove 206 is in contact with the plunger joint 201, which can make the oblique deflection of the plunger joint 201 more convenient.

[0052] It should be noted that the stepped groove 206 is set at a right angle, and the arc shape of the stepped groove 206 is located at a direct inner corner position. The arc shape can make the movement of the plunger joint 201 smoother, but when the plunger joint 201 tilts and deflects beyond the arc-shaped part, the inner wall of the stepped groove 206 will interfere with the plunger joint 201, thereby ensuring that the plunger joint 201 is always located in the stepped groove 206.

[0053] In a preferred embodiment of the present invention, the plunger device 200 also includes a first control valve 204 and a second control valve 205; the first control valve 204 is located between the plunger joint 201 and the first section plunger 202, and the first control valve 204 is connected to the first section plunger 202; two second control valves 205 are provided, one second control valve 205 is connected to one end of the first section plunger 202 away from the plunger joint 201, and the other second control valve 205 is connected to one end of the second section plunger 203 away from the plunger joint 201.

[0054] Optionally, the first control valve 204 and the second control valve 205 belong to the valve pair of the plunger device 200. Since the valve pair belongs to the existing structure of the oil pump, it will not be described in detail here.

[0055] In a preferred embodiment of the present invention, a first joint 103 is provided at one end of the oil pipe 102 away from the bottom of the oil well, one end of the pump barrel 101 is inserted into the first joint 103, and the pump barrel 101 is threadedly connected to the first joint 103; a threaded section is provided at the other end of the oil pipe 102, and a second joint is provided at the other end of the pump barrel 101, the oil pipe 102 is inserted into the adjacent pump barrel 101 through the threaded section, and is threadedly connected to the second joint of the pump barrel 101.

[0056] In the present embodiment, since the pump barrel 101 and the oil pipe 102 are placed vertically in the oil well, in order to ensure the sealing of the overall connection, in order to ensure the honey-tightness of the connection between the pump barrel 101 and the oil pipe 102, an external oil pipe thread is provided at one end of the pump barrel 101, and an internal oil pipe thread is provided in the first joint 103 of the oil pipe 102, so that the adjacent pump barrels 101 and oil pipes 102 are fixedly connected by the oil pipe threads; further, a second joint is provided at the other end of the pump barrel 101, the second joint is fixedly connected to the pump barrel 101, and the adjacent oil pipe 102 is inserted into the second joint, and an internal oil pipe thread is provided in the second joint, and an external oil pipe thread is provided at one end of the oil pipe 102 close to the second joint, so that the adjacent pump barrels 101 and oil pipes 102 are fixedly connected by the oil pipe threads.

[0057] In order to ensure that the pump barrel 101 can be inserted into the inner wall of the first joint 103, in a preferred embodiment of the present invention, one end of the pump barrel 101 inserted into the first joint 103 is tapered.

[0058] In a preferred embodiment of the present invention, a fixed valve device 300 is further included; the fixed valve device 300 is connected to the pump barrel device 100 located at the bottom of the oil well.

[0059] In this embodiment, since the oil pipe 102 is at one end pointing vertically downward, the fixed valve device 300 needs to be fixedly connected to the oil pipe 102 located at the bottom of the oil well. The fixed valve device 300 is provided with an internal oil pipe thread at one end away from the bottom of the oil well, and the oil pipe 102 located at the bottom of the oil well is fixedly connected to the fixed valve device 300 through the oil pipe thread via the external oil pipe thread.

[0060] Specifically, the plunger device 200 is placed in the oil extraction channel of the pump barrel device 100 through the sucker rod. At this time, the first section plunger 202 cooperates with the pump barrel 101 of the first group of pump barrel devices 100 to seal, and the sealing section is the length of the pump barrel 101, while the lower part of the first section plunger 202 and the second section plunger 203 are not sealed in the oil pipe 102 of the first group of pump barrel devices 100; when the plunger device 200 moves downward until the second section plunger 203 is about to enter the second group of pump barrel devices 100, the upper part of the first section plunger 202 is in the short pump barrel 101 of the first group of pump barrel devices 100, and is in contact with the pump barrel 101. 101 cooperates and seals; the plunger device 200 continues to descend, and the second plunger 203 enters the pump barrel 101 of the second pump barrel device 100 to form a cooperative seal, and the upper part of the first plunger 202 is still in the pump barrel 101 of the first pump barrel device 100, and cooperates and seals with the pump barrel 101. Although the two pump barrels 101 are not coaxial, the plunger joint 201 can automatically adjust the deviation of the first plunger 202 and the second plunger 203 at this time, so that the first plunger 202 and the second plunger 203 cooperate with the pump barrel 101 in the two pump barrels 101 respectively, and can move flexibly. The plunger device 200 continues to descend, and when the first plunger 202 completely enters the oil pipe 102 of the first pump barrel device 100, the second plunger 203 completely enters the pump barrel 101 of the second pump barrel device 100 to form a cooperative seal, and the sealing section is the length of the second plunger 203. The plunger device 200 continues to descend, and the first-section plunger 202 enters the pump barrel 101 of the second group of pump barrel devices 100. The plunger joint 201 can automatically adjust the deviation of the first-section plunger 202 and the second-section plunger 203, so that the first-section plunger 202 and the second-section plunger 203 are both in the pump barrel 101 and cooperate with the pump barrel 101; similarly, the plunger device 200 passes through the second group and the following pump barrel devices 100 in turn; in addition, since the upward movement of the plunger device 200 is similar to the downward step, it will not be repeated here.

[0061] The wear-resistant extra-long oil pump provided in this embodiment has the advantages of convenient operation, easy processing, flexible movement, long service life, low manufacturing cost and high cost performance; wherein, the pump barrel device 100 is formed by connecting several groups of pump barrels 101 and oil pipes 102 through oil pipe threads, which is more convenient to use at the oil production site. The pump barrel 101 provided in this embodiment is the same as the standard pump barrel 101, does not require a special blank pipe, and does not require repeated straightening and special processing during the production process, so it is easier to process; the first section plunger 202 and the second section plunger 203 are movably connected by the plunger joint 201, so that the plunger device 200 can pass through the pump barrel device 100 smoothly and without obstruction, so the passability is good, and the movement is flexible and without obstruction; through the length coordination of the pump barrel 101 and the first section plunger 202, the wear cycle between the first section plunger 202 and the pump barrel 101 is more matched, so that the life of the two is equivalent, and the sealing surface of the first section plunger 202 is extended, and the service life is longer, achieving the technical effect of low manufacturing cost and longer service life.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wear-resistant extra-long oil well pump, characterized in that: include: Plunger assembly and pump barrel assembly; The plunger device is located in the oil extraction channel of the pump barrel device, and the plunger device is used to move along the oil extraction channel of the pump barrel device; The pump barrel device comprises a pump barrel and an oil pipe; there are at least two pump barrels, any two pump barrels are connected by the oil pipe, and the plunger device and the pump barrel are sealed; the length of any pump barrel is smaller than the length of the plunger device, the length of the oil pipe is smaller than the length of the plunger device, and the inner diameter of the oil pipe is larger than the outer diameter of the plunger device, so that when the plunger device moves to the oil pipe position, there is a gap between the plunger device and the oil pipe; The plunger device comprises a plunger joint, a first plunger section and a second plunger section; the first plunger section and the second plunger section are connected via the plunger joint, and the plunger joint is used to enable the first plunger section and the second plunger section to deflect relative to each other; The length of the first plunger section is greater than that of the second plunger section, and the second plunger section is located at one end of the pump barrel device close to the bottom of the oil well; A through hole is provided at one end of the second plunger, the plunger joint is inserted in the through hole, and a stepped groove is provided on the side wall of the second plunger close to the through hole, one end of the plunger joint is engaged with the stepped groove, and the plunger joint can deflect in the horizontal direction relative to the stepped groove; One end of the plunger joint extending out of the second plunger section is threadedly connected to the first plunger section; The plunger device also includes a first control valve and a second control valve; The first control valve is located between the plunger joint and the first plunger section, and the first control valve is connected to the first plunger section; Two second control valves are provided, one of which is connected to one end of the first section plunger away from the plunger joint, and the other of which is connected to one end of the second section plunger away from the plunger joint.

2. The wear-resistant extra-long oil well pump according to claim 1, characterized in that: The stepped groove of the second plunger is in an arc shape.

3. The wear-resistant extra-long oil well pump according to claim 1, characterized in that: The length of the pump barrel is shorter than the length of the oil pipe, and the total length of the oil pipe and the adjacent pump barrel is longer than the length of the plunger device.

4. The wear-resistant extra-long oil well pump according to claim 3, characterized in that: A first joint is provided at one end of the oil pipe away from the bottom of the oil well, one end of the pump barrel is inserted into the first joint, and the pump barrel is connected to the first joint by threads; The other end of the oil pipe is provided with a threaded section, and the other end of the pump barrel is provided with a second joint. The oil pipe is inserted into the adjacent pump barrel through the threaded section and is threadedly connected with the second joint of the pump barrel.

5. The wear-resistant extra-long oil well pump according to claim 4, characterized in that: One end of the pump barrel inserted into the first joint is tapered.

6. The wear-resistant extra-long oil well pump according to any one of claims 1 to 5, characterized in that: Also included is a fixed valve device; The fixed valve device is connected to the pump barrel device located at the bottom of the oil well.

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