CN104481458A - A kind of protection device of multifunctional machine rod pump - Google Patents

Abstract

The invention provides a multifunctional machine-rod pump protection device which comprises a cylindrical worm-gear shaft main body (4), a primary worm input shaft (3) and a secondary worm shaft (6), wherein the secondary worm shaft (6) comprises a worm section and a worm wheel (10), a worm on the primary worm input shaft (3) is connected with the worm wheel (10) on the secondary worm shaft (6) through the worm wheel and the worm, the worm section on the secondary worm shaft (6) is connected with the worm wheel on the worm-gear shaft main body (4) through the worm wheel and the worm, and the multifunctional machine-rod pump protection device further comprises a protector shell (7). The multifunctional machine rod pump protection device can enable the worm wheel shaft body and the friction body to drive the square clamp to rotate in the process of up-and-down operation of the polish rod, so that the polish rod, the sucker rod and the oil well pump plunger are driven to rotate at a constant speed, eccentric wear is avoided, the pump detection period is prolonged, and the service life of the oil pumping unit is prolonged.

Description

A kind of protection device of multifunctional machine rod pump

technical field

The invention relates to the technical field of oil production engineering equipment, in particular to a multifunctional machine rod pump protection device.

Background technique

At present, oil production in major domestic oil fields is mostly realized by the rod pumping system based on "three pumping" equipment (pumping unit, sucker rod and pump). In actual work, due to various complex reasons in the pumping system of the rod pump, the eccentric wear of the sucker rod, the eccentric wear of the friction pair formed by the plunger and the pump barrel of the oil well pump, the breakage of the fixed valve of the oil well pump and the oil pumping The phenomenon of rod coupling breaking off is becoming more and more serious. During the reciprocating movement of the donkey head of the pumping unit, the peak loads at the upper and lower dead points cause excessive power consumption of the motor of the pumping unit.

Therefore need to develop a kind of multifunctional machine rod pump protection device that improves sucker rod, oil well pump working condition, prolongs operation cycle and saves energy and reduces consumption.

Contents of the invention

In order to solve the problem of eccentric wear of the sucker rod, the eccentric wear of the friction pair formed by the plunger of the oil well pump and the pump barrel. The invention provides a multifunctional machine rod pump protection device, which can make the main body of the worm gear shaft and the friction body drive the square clamp to rotate during the process of the polished rod running up and down, thereby driving the polished rod and the sucker rod 1. The plunger of the oil well pump rotates at a constant speed to avoid eccentric wear and extend the pump inspection cycle, thereby prolonging the service life of the oil well pumping unit.

The technical solution adopted by the present invention to solve the technical problem is: a multi-functional machine rod pump protection device, including a cylindrical worm shaft main body, a primary worm input shaft and a secondary worm shaft, and the secondary worm shaft contains a worm segment and worm gear, the worm on the primary worm input shaft and the worm gear on the secondary worm shaft are connected by a worm gear, and the worm segment on the secondary worm shaft is connected by a worm gear to the worm gear on the main body of the worm shaft. Functional stick pump protectors also contain protector housings that hold the main body of the worm gear shaft, the primary worm input shaft and the secondary worm shaft.

The main body of the worm shaft is arranged vertically, the axis of the main body of the worm shaft is perpendicular to the axis of the secondary worm shaft, the axis of the secondary worm shaft is perpendicular to the axis of the input shaft of the primary worm, and the protector housing is sleeved between the main body of the worm shaft and Outside the secondary worm shaft, the primary worm input shaft is set in the mounting hole at the lower part of the protector housing. Both ends of the primary worm input shaft are located outside the protector shell. The through hole corresponding to the inner through hole of the main body.

The outer diameter of the upper part of the worm gear shaft main body matches the inner cavity surface of the protector housing, and a bearing bearing is arranged between the lower part of the worm gear shaft main body and the bottom of the protector housing.

The reduction ratio between the worm on the primary worm input shaft and the worm gear on the secondary worm shaft is 13 to 35, and the reduction ratio between the worm section on the secondary worm shaft and the worm gear on the main body of the worm shaft is 1 :C～1:D.

One end of the primary worm input shaft is provided with a drive unit for driving the primary worm input shaft to rotate.

The drive unit is a flexible metal chain, and one end of the flexible metal chain is fixedly connected to one end of the input shaft of the primary worm.

The other end of the first-stage worm input shaft is provided with an anti-reverse flywheel for keeping the first-stage worm input shaft to rotate in one direction.

A cylindrical friction body is arranged above the main body of the worm gear shaft. The axis of the friction body coincides with the axis of the main body of the worm gear shaft. The inner diameter of the friction body is equal to the inner diameter of the main body of the worm gear shaft. It rotates on the same axis as the main body of the worm gear shaft.

An energy storage unit capable of absorbing axial vibration of the friction body is arranged between the worm gear shaft main body and the friction body.

The energy storage unit is at least one disk spring arranged in sequence along the axial direction of the friction body.

An oil pumping unit, comprising a donkey head and a frame, a polished rod is hung under the donkey head, and the pumping unit also includes the above-mentioned multifunctional rod pump protection device, which is sleeved on the polished rod Outside, the polished rod passes through the main body of the worm gear shaft, and the protector housing is fixedly connected with the donkey head through a connecting piece. A square clip is fixed outside the polished rod, and the square clip is in contact with the upper end of the worm gear shaft main body. When the worm gear shaft main body rotates, the worm gear shaft main body The main body of the square clip, the polished rod and the worm gear shaft can be rotated around the same axis.

An oil pumping unit, comprising a donkey head and a frame, a polished rod is hung under the donkey head, and the pumping unit also includes the above-mentioned multifunctional rod pump protection device, which is sleeved on the polished rod Outside, the polished rod passes through the friction body and the main body of the worm gear shaft. The protector shell is fixedly connected with the donkey head through the connecting piece. A square clip is fixed outside the polished rod. The square clip contacts the upper end of the friction body. When the friction body rotates, the friction body The square clip, the polished rod and the friction body can be rotated around the same axis.

The beneficial effects of the present invention are: the multi-function rod pump protection device can make the main body of the worm gear shaft and the friction body drive the square clip to rotate during the up and down movement of the polished rod, thereby driving the polished rod, the sucker rod, and the plunger of the pump to rotate at a constant speed , to avoid eccentric wear and prolong the pump inspection period, thereby prolonging the service life of the pumping unit.

Description of drawings

The multifunctional rod pump protection device of the present invention will be further described in detail below in conjunction with the accompanying drawings.

Fig. 1 is a structural schematic diagram of a multifunctional machine rod pump protection device.

Fig. 2 is a schematic view of the working state of the multi-function rod pump protection device.

Among them: 1. Flexible galvanized steel chain, 2. Flexible quick connector, 3. Primary worm input shaft, 4. Main body of worm gear shaft, 5. Bearing bearing, 6. Secondary worm shaft, 7. Protector shell, 8. Friction body, 9. Energy storage unit, 10. Worm wheel, 11. Thrust bearing, 12. Anti-reverse flywheel;

21. Steel pendant, 22. Square clamp, 23. Donkey head, 24. Polished rod, 25. Steel wire rope.

Detailed ways

The multi-function rod pump protection device of the present invention will be further described in detail below in conjunction with the accompanying drawings. A multi-functional mechanical pump protection device, including a cylindrical worm shaft main body 4, a primary worm input shaft 3 and a secondary worm shaft 6, the secondary worm shaft 6 contains a worm segment and a worm wheel 10, and the primary worm input shaft The worm on the shaft 3 and the worm gear 10 on the secondary worm shaft 6 are connected by a worm gear, and the worm section on the secondary worm shaft 6 is connected by a worm gear to the worm gear on the worm shaft main body 4. The pump protection device also includes a protector housing 7 for carrying the worm gear shaft main body 4 , the primary worm input shaft 3 and the secondary worm shaft 6 , as shown in FIG. 1 .

After the primary worm input shaft 3 rotates around its axis, the secondary worm shaft 6 will drive the worm gear shaft main body 4 to also rotate around its axis. In this embodiment, as shown in Figure 1, the worm shaft main body 4 is arranged vertically, the axis of the worm shaft main body 4 is perpendicular to the axis of the secondary worm shaft 6, and the axis of the secondary worm shaft 6 is parallel to the input of the primary worm shaft. The axis of the shaft 3 is vertical, the protector housing 7 is sleeved outside the worm gear shaft main body 4 and the secondary worm shaft 6, the primary worm input shaft 3 is located in the long mounting hole at the bottom of the protector housing 7, and the primary worm Both ends of the input shaft 3 are arranged outside the protector housing 7 so as to be connected with other parts, and the bottom of the protector housing 7 is provided with a through hole corresponding to the inner through hole of the worm gear shaft main body 4, and the through hole can be It is used for passing through the polished rod 4.

The outer diameter of the upper part of the worm gear shaft main body 4 matches the inner cavity surface of the protector housing 7, and a bearing bearing 5 is arranged between the lower part of the worm gear shaft main body 4 and the bottom of the protector housing 7, that is, the worm gear shaft main body 4 is located on the load bearing 5, the load bearing 5 is located on the inner bottom plane of the protector housing 7, the load bearing 5 bears the weight of the entire polished rod system, and the inner diameter of the worm gear shaft main body 4 is larger than the diameter of the polished rod.

The reduction ratio between the worm on the primary worm input shaft 3 and the worm wheel 10 on the secondary worm shaft 6 is 13-35, preferably 28 in this embodiment. The reduction ratio between the worm section on the secondary worm shaft 6 and the worm wheel on the worm shaft main body 4 is 1:C˜1:D, preferably 2:5 in this embodiment.

One end of the primary worm input shaft 3 is provided with a drive unit for driving the primary worm input shaft 3 to rotate. In this embodiment, as shown in FIG. 1 , the drive unit is a flexible metal chain 1 , such as a flexible galvanized steel chain, and one end of the flexible metal chain 1 is fixedly connected to one end of the primary worm input shaft 3 . When in use, the other end of the flexible metal chain 1 is hooked to a certain position of the pumping unit frame, and can be arranged above or below the multifunctional rod pump protection device as required, and the other end is connected to the primary worm input shaft 3 The right side is connected by flexible quick connector 2. The structural characteristic of the flexible metal chain 1 is that it can be twisted in a 360-degree direction, and this characteristic enables the other end of the flexible metal chain 1 to be hung on any position of the pumping unit frame without any stagnation. This drive unit can also choose other existing devices that can make the first-stage worm input shaft 3 rotate, but the advantage of using the flexible metal chain 1 as the drive unit is that no additional power is required, and the up and down movement of the donkey head 23 and the polished rod 24 will pass through the flexible metal chain 1. The chain 1 pulls the primary worm input shaft 3 to rotate, thereby providing power to the primary worm input shaft 3 .

The other end of the primary worm input shaft 3 is provided with an anti-reverse flywheel 12 for maintaining the primary worm input shaft 3 in one-way rotation, as shown in FIG. 1 . The anti-reverse flywheel 12 forms a rigid connection with the left side of the first-stage worm input shaft 3 through a key. The working principle of the anti-reverse flywheel is the principle of a reverse bearing. One-way rotation can transmit power, and reverse rotation keeps the clutch state. The application of the anti-reverse flywheel can prevent the reverse rotation of the primary worm input shaft during the upstroke of the pumping unit. Or the anti-reverse flywheel 12 is a common flywheel, and the anti-reverse flywheel 12 is connected with the other end of the primary worm input shaft 3 through a one-way bearing.

During use, due to the drag of the flexible metal chain 1's own weight, the input shaft 3 of the larger worm screw will be driven to reverse idling. This idling will affect the effective rotation angle under the drive state of the input shaft. Setting the anti-reverse flywheel 12 can avoid the phenomenon of "slip" and improve the overall transmission efficiency of the device.

As shown in Figure 1, a cylindrical friction body 8 is arranged above the worm gear shaft main body 4, and the friction body 8 is seated on the worm gear shaft main body 4, the axis of the friction body 8 coincides with the axis of the worm gear shaft main body 4, and the friction body 8 The inner diameter of 8 is equal to the inner diameter of the worm gear shaft main body 4, and the lower end of the friction body 8 is inserted into the upper end of the worm gear shaft main body 4. When the worm gear shaft main body 4 rotates, the worm gear shaft main body 4 can make the friction body 8 It rotates on the same axis as the worm gear shaft main body 4 .

An energy storage unit 9 capable of absorbing axial vibration of the friction body 8 is provided between the worm gear shaft main body 4 and the friction body 8 . The energy storage unit 9 is at least one disc spring arranged in sequence along the axial direction of the friction body 8 . As shown in Figure 1, in this embodiment, the number of the disc springs is 2 pieces, the upper bearing surface of one disc spring is in contact with the friction body 8, and the lower bearing surface of the other disc spring is in contact with the worm gear shaft. The upper planes of the main body 4 are in contact. When in use, the weight of the downhole pole and liquid column carried by the square clip 22 causes the disc spring to deform to a certain extent, which can ensure that the weight is not suddenly loaded on the rope hanger, thereby reducing the impact and vibration on the pumping unit. In addition, the energy storage unit 9 can also choose a ring-shaped rubber pad, and those skilled in the art can select the parameters of the rubber pad according to needs to suit the use.

A pumping unit, the pumping unit includes a donkey head 23 and a frame, and a polished rod 24 is hung below the donkey head 23, and the pumping unit also includes the above-mentioned multifunctional machine rod pump protection device, as shown in Figure 2 As shown, the multifunctional machine rod pump protection device is sleeved outside the polished rod 24, the polished rod 24 passes through the friction body 8 and the worm shaft main body 4, the protector housing 7 is fixedly connected with the donkey head 23 through the connecting piece, and the polished rod 24 is fixed with The square clip 22, the square clip 22 is in contact with the upper end of the friction body 8, that is, the square clip 22 is seated on the friction body 8, when the friction body 8 is driven and rotated by the worm gear shaft main body 4, the friction body 8 can rely on gravity to generate The friction force makes the square clamp 22, the polished rod 24 and the friction body 8 rotate around the same axis. If there is no friction body 8, the square clip 22 can also be seated on the worm shaft main body 4. At this time, when the worm shaft main body 4 rotates, the worm shaft main body 4 can also rely on the friction force produced by gravity to make the square clip 22, the polished rod 24 and the worm gear shaft main body 4 rotate around the same axis. In this embodiment, the connecting piece is a steel wire rope 25 .

The working principle of the multi-functional machine rod pump protection device is to drive the first-stage worm input shaft 3 to rotate at a fixed angle through the drive unit, and then through the first-stage worm input shaft 1, the second-stage worm shaft 6 and the worm shaft main body 4 to amplify the speed in turn , the friction body 8 drives the suspension rope part of the pumping unit—the square clip 22 to rotate, thereby driving the polished rod 24, the sucker rod, and the plunger of the oil pump to rotate at a constant speed; in addition, the efficient energy storage unit 9 of the device can maximize The underground shock absorption of the rod string system reduces the peak load of the reciprocating upper and lower dead points of the donkey head 23 of the pumping unit, thereby reducing the probability of the rod string system breaking off and achieving the purpose of saving energy and reducing consumption.

The working process of the multifunctional machine rod pump protection device is as follows: as shown in Figure 2, the multifunctional machine rod pump protection device is sleeved outside the polished rod 24 below the donkey head 23 of the pumping unit, one end of the flexible metal chain 1 It is connected to the right side of the primary worm input shaft 3 through a flexible quick connector 2, and the other end of the flexible metal chain 1 is hooked to a certain position on the frame of the pumping unit. In this embodiment, the other end of the flexible metal chain 1 Located above the multi-function stick pump protector sleeve. In addition, the upper plane of the steel pendant 21 is in contact with the grooves at both ends of the protector housing 7 of the multifunctional machine rod pump protection device. The steel pendant 21 and the steel wire rope 25 are connected together by filling lead, and the steel wire rope 12 and the donkey head 23 articulated as one. The square clamp 22 is connected with the polished rod 24 through plastic deformation, and the square clamp 22 is in contact with the friction body 8 .

When the donkey head 23 of the pumping unit reaches the bottom dead point downward, the flexible metal chain 1 is gradually straightened and forced to drive the primary worm input shaft 3 to rotate a fixed angle. When the donkey head 23 of the pumping unit reaches the top dead point, the flexible metal chain 1 gradually returns to the flexible state. At this time, the primary worm input shaft 3 is not forced by the flexible metal chain 1, so there is no rotational movement. During the rotation of the first-stage worm input shaft 3 at a fixed angle, the rotational speed is amplified through the first-stage worm input shaft 1, the second-stage worm shaft 6, and the worm shaft main body 4 in sequence, and the friction body 8 drives the rope suspension part of the pumping unit— - The square clip 22 rotates, thereby driving the polished rod 24, the sucker rod, and the plunger of the oil well pump to rotate at a constant speed, avoiding eccentric wear and prolonging the pump inspection cycle.

The donkey head 23 drives the multifunctional machine lever pump protection device to move up and down synchronously by the steel pendant 21 at the bottom of the wire rope 25 during the up and down stroke. Since the plastic deformation force generated between the square clip 22 and the polished rod 24 bears the weight of the downhole rod string and the liquid column, the multifunctional machine rod pump protection device bears the weight of the downhole rod string and the liquid column through the square clip 22 . The friction force between the friction body 8 and the square clip 22 is the value obtained by multiplying the weight of the downhole rod string and liquid column by the friction coefficient, which is far greater than the torque formed by the forced external force of the flexible connection unit after the rotational speed is amplified, so the friction body 8 and Sliding can not take place between the square clips 22. The polished rod 24 and the carrying rod hang above the friction body 8 of the multifunctional machine rod pump protection device. Since the polished rod 24 and the carrying rod have fewer contact points with the downhole pipe wall, the rotational frictional resistance torque is much smaller than the rotational speed. The resulting torque after amplification. Due to the function of the bearing bearing 5 in the multifunctional rod pump protection device, the torque formed after the rotation speed is amplified can easily rotate the polished rod 24 to achieve the purpose of preventing partial wear.

The multifunctional rod pump protection device can maximize the shock absorption of the rod system, reduce the peak load of the top and bottom dead points of the donkey head reciprocating movement of the pumping unit, reduce the probability of the rod system breaking off and achieve the purpose of saving energy and reducing consumption.

The multifunctional rod pump protection device can also drive the downhole rod string to rotate in one direction, generate a tightening moment, and reduce the probability of the rod string system breaking off.

The above is only a specific embodiment of the present invention, and cannot limit the scope of the invention, so the replacement of its equivalent components, or the equivalent changes and modifications made according to the patent protection scope of the present invention, should still fall within the scope of this patent. category. In addition, the technical features and technical features, technical features and technical solutions, and technical solutions and technical solutions in the present invention can be used in free combination.

Claims (10)

1. a Multi Role Aircraft bar pump protector, it is characterized in that, described Multi Role Aircraft bar pump protector comprises columnar worm-wheel shaft main body (4), one-level worm input shaft (3) and second-stage worm axle (6), second-stage worm axle (6) is upper containing worm screw section and worm gear (10), worm screw on one-level worm input shaft (3) with the worm gear (10) on second-stage worm axle (6) for worm and gear connects, described worm screw section on second-stage worm axle (6) and the worm gear in worm-wheel shaft main body (4) are that worm and gear connects, described Multi Role Aircraft bar pump protector also contains for carrying worm-wheel shaft main body (4), the protector housing (7) of one-level worm input shaft (3) and second-stage worm axle (6).

2. Multi Role Aircraft bar pump protector according to claim 1, it is characterized in that: worm-wheel shaft main body (4) is vertically arranged, the axis of worm-wheel shaft main body (4) and the axes normal of second-stage worm axle (6), the axis of second-stage worm axle (6) and the axes normal of one-level worm input shaft (3), protector housing (7) is set in worm-wheel shaft main body (4) and second-stage worm axle (6) outward, one-level worm input shaft (3) is located in the installing hole of protector housing (7) bottom, the two ends of one-level worm input shaft (3) are all located at protector housing (7) outward, the bottom of protector housing (7) is provided with the through hole corresponding with the inner via hole of worm-wheel shaft main body (4).

3. Multi Role Aircraft bar pump protector according to claim 2; it is characterized in that: the external diameter on the top of worm-wheel shaft main body (4) and the surface of internal cavity of protector housing (7) match, and are provided with loading bearing (5) between the bottom of worm-wheel shaft main body (4) and the bottom of protector housing (7).

4. Multi Role Aircraft bar pump protector according to claim 1; it is characterized in that: the speed reducing ratio between the worm gear (10) on the worm screw on one-level worm input shaft (3) and second-stage worm axle (6) is 13 ~ 35, and the described worm screw section on second-stage worm axle (6) and the speed reducing ratio between the worm gear in worm-wheel shaft main body (4) are 15 ~ 30.

5. Multi Role Aircraft bar pump protector according to claim 1, is characterized in that: one end of one-level worm input shaft (3) is provided with the driver element for driving one-level worm input shaft (3) to rotate.

6. Multi Role Aircraft bar pump protector according to claim 5; it is characterized in that: described driver element is flexible metal chain (1), one end of this flexible metal chain (1) is fixedly connected with one end of one-level worm input shaft (3).

7. Multi Role Aircraft bar pump protector according to claim 5, is characterized in that: the other end of one-level worm input shaft (3) is provided with the anti-reverse flywheel (12) for making one-level worm input shaft (3) keep single direction rotation.

8. Multi Role Aircraft bar pump protector according to claim 2; it is characterized in that: worm-wheel shaft main body (4) top is provided with columnar friction piece (8); the axis of friction piece (8) and the dead in line of worm-wheel shaft main body (4); the internal diameter of friction piece (8) equals the internal diameter of worm-wheel shaft main body (4); when worm-wheel shaft main body (4) rotates, worm-wheel shaft main body (4) can make friction piece (8) and worm-wheel shaft main body (4) with same axis for axle rotates.

9. Multi Role Aircraft bar pump protector according to claim 8, is characterized in that: the energy-storage units (9) being provided with the axial vibration that can absorb friction piece (8) between worm-wheel shaft main body (4) and friction piece (8).

10. Multi Role Aircraft bar pump protector according to claim 9, is characterized in that: energy-storage units (9) is at least one disk spring axially set gradually along friction piece (8).