CN218862568U - Anti-falling device for oil-submersible electric pump oil production well - Google Patents

Abstract

The utility model relates to an oil well anti-falling device of an electric submersible pump, which comprises a mandrel extending up and down, a receiving basket used for receiving hard falling objects and an auger used for receiving flexible falling objects, wherein the auger comprises a shaft sleeve and an auger blade fixed outside the shaft sleeve, and the auger is sleeved on the mandrel through the rotation of the shaft sleeve and can slide on the mandrel along the up-and-down direction; the utility model can absorb the flexible falling objects firmly through the free rotation of the auger, thereby absorbing the flexible falling objects such as cable clips, small flat sheath, sealing adhesive tape and the like generated in all production and maintenance processes on the auger blade; and the hard falling objects such as the small bolts, the mechanical clamping teeth and the like can be temporarily received by the receiving basket, and when the unit is lifted out of the shaft in the electric pump operation construction, the soft and hard falling objects absorbed by the device are taken out of the shaft, so that the underground accident caused by the accumulation of the small underground falling objects in the electric submersible pump operation construction is avoided.

Description

Anti-falling device for oil-submersible electric pump oil production well

Technical Field

The utility model relates to an oil production's downhole tool, concretely relates to oily charge pump of diving prevents junk device.

Background

In the process of development of high-permeability and ultra-high-permeability oil reservoirs, the extract of an electric submersible pump is one of important mechanical extraction modes, and in the production and operation construction processes of an oil well with the electric submersible pump, flexible drops such as cable binding clamps, cable sheaths, sealing adhesive tapes and the like can be generated, and hard drops such as connecting bolts of an electric pump unit, lead sealing gaskets of an oil injection valve of a motor, rust in the annular space of an oil sleeve, clamping teeth of a hydraulic clamp and the like can be generated, so that underground accidents are caused. Along with the increase of the production time of the electric submersible pump and the increase of the operation and construction times, the junk is accumulated in a shaft, particularly when underground tools such as a bridge plug, a sand surface, a packer and the like are arranged in an inlet cylinder, the junk is accumulated on the upper end surface of the underground tool and generally reaches 2-6m, the salvaging difficulty is increased due to the complexity of the junk, the construction period is prolonged, and the implementation of yield increasing measures such as sand washing, layer changing, profile control, water plugging and the like of an oil well is greatly influenced.

In order to reduce the falling objects of the oil-submersible electric pump oil production well, one method is that when the tubular column and the electric pump unit are lifted down, an operator pads a well mouth sealing rubber sheet at the well mouth, which can prevent the tubular column and the electric pump unit from being lifted down, the falling objects generated above the well mouth, but in the production process of the oil-submersible electric pump, and the rust scale and the cable binding clip, the small flat sheath, the cable sheath, the thread buckle sealing rubber belt of the oil pipe unit, and other soft falling objects and hard falling objects in the annular space hung down when the tubular column is lifted down, cannot play a preventive role, and still easily cause the well falling accidents. In addition, there is also a submersible electric pump hanging basket connected below a submersible electric pump unit and capable of receiving junk in the prior art, and the submersible electric pump hanging basket is disclosed in patent document with the publication number of CN208502990U, and includes a basket body and a central pipe, wherein the basket body is provided with a liquid flow hole, the upper part of the central pipe is connected with a coupling, the lower part of the central pipe penetrates through the bottom of the basket body and is welded with the basket body at the penetrating position, and the submersible electric pump hanging basket is connected with a reducer union below a motor of the submersible electric pump through the coupling. When the electric submersible pump hanging basket in the prior art is used, hard sundries such as falling objects, oil sludge sand and the like can be received in an annular space between the basket body and the central pipe, but soft falling objects such as cable binding clips, small flat protective skins and cable armor can flow through the basket body along with liquid, so that effective collection cannot be carried out.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an oily charge pump oil recovery well of diving prevents junk device to solve prior art and can not carry out the technical problem of effective collection to soft junk and rigid junk simultaneously.

The utility model discloses an oily charge pump oil recovery well of diving prevents junk device, including the dabber that extends from top to bottom and the receiving basket that is used for receiving hard junk, be equipped with the import that supplies junk and liquid to get into on the receiving basket, be used for filtering the export that gets into the liquid in the receiving basket, the dabber upper end is connected with the top connection that is used for connecting oily charge pump of diving, still include the auger that is used for receiving flexible junk, the auger includes the axle sleeve and fixes the auger blade outside the axle sleeve, the auger rotates the suit through the axle sleeve and can slide along the upper and lower direction on the dabber at the spindle; the receiving basket comprises an outer barrel, and a connecting sleeve and a bottom plate which are fixed at the upper end and the lower end of the outer barrel, wherein an upper mounting hole and a lower mounting hole which are used for penetrating the mandrel are respectively arranged on the connecting sleeve and the bottom plate, and the receiving basket is sleeved on the mandrel through the upper mounting hole and the lower mounting hole and is positioned below the auger.

The utility model provides an oily charge pump oil recovery well of diving prevents junk device, has installed the auger that can rotate freely and slide from top to bottom in the top of receiving the basket at the dabber for when flexible junk passes through the auger blade, through the free rotation of auger, firmly absorb flexible junk, thus the utility model discloses can adsorb flexible junk such as cable clip, little flat skin and sealing tape that all production and maintenance processes produced on the auger blade; and the hard falling objects such as the small bolts, the mechanical clamping teeth and the like can be temporarily received by the receiving basket, and when the unit is lifted out of the shaft in the electric pump operation construction, the soft and hard falling objects absorbed by the device are taken out of the shaft, so that the underground accident caused by the accumulation of the small underground falling objects in the electric submersible pump operation construction is avoided.

Furthermore, a ball head is arranged at the upper end of the mandrel, the upper joint is a pipe body, a ball seat used for stopping and suspending the ball head of the mandrel is arranged at the lower end of the upper joint, a through hole is formed in the center of the ball seat, the diameter of the through hole is larger than that of the mandrel but smaller than that of the ball head, so that the rod body of the mandrel can pass through the through hole of the ball seat, the mandrel is suspended on the ball seat of the upper joint through the ball head, and the ball head can rotate on the ball seat. The ball head of the mandrel is suspended and connected on the upper joint through the ball seat, so that the mandrel can freely swing within the range of any angle, the vibration of the electric submersible pump during operation is counteracted, and the operation state of the electric submersible pump is not influenced.

Furthermore, the lower end of the rod body of the mandrel is provided with a connector, the connector is provided with an external thread for installing a locking nut, and the locking nut is used for upwards blocking the receiving basket so as to prevent the receiving basket from falling off.

Furthermore, the connecting head is also provided with a split pin hole for inserting a split pin, and the split pin is used for preventing the locking nut from falling off in a reverse buckling manner.

Furthermore, the outlet on the receiving basket comprises a liquid leakage hole formed in the outer barrel and a sieve hole formed in the bottom plate.

Further, the receiving basket is rotationally engaged with the mandrel. Because the receiving basket is swing joint also, make the utility model discloses an each part is when receiving flexible and hard junk, but the automatic adjustment direction reduces the influence to unit running state.

Furthermore, the connecting sleeve comprises a supporting ring fixed at the upper end of the inner wall of the outer barrel and a supporting shaft sleeve arranged in the center of the inner part of the supporting ring and used for being sleeved on the mandrel, the through hole in the supporting shaft sleeve forms the upper mounting hole, the supporting shaft sleeve is fixedly connected with the supporting ring through a supporting rod, one end of the supporting rod is fixedly connected with the supporting ring, and the other end of the supporting rod is fixedly connected with the supporting shaft sleeve.

Furthermore, the support rods are arranged between the support shaft sleeve and the support ring in a radial mode, and gaps between the adjacent support rods form inlets in the receiving basket.

Further, the auger comprises a first auger and a second auger which are distributed from top to bottom, and an isolation shaft sleeve sleeved on the central shaft is arranged between the first auger and the second auger. The two augers are isolated by arranging the isolation shaft sleeve, so that the augers do not interfere with each other when moving freely.

Furthermore, first hank dragon includes first axle sleeve and fixes the first hank dragon blade in first axle sleeve outside, and first hank dragon blade is top-down clockwise rotation, the second auger includes the second axle sleeve and fixes the second auger blade in second axle sleeve outside, and second auger blade is top-down anticlockwise rotation. By arranging the two packing augers which are arranged in a positive and negative opposite mode, the absorption probability of the flexible falling objects can be increased, and the axial load of the device is balanced.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment 1 of the oil-submersible electric pump oil production well anti-falling device of the present invention;

FIG. 2 is a schematic view of the upper joint of FIG. 1;

FIG. 3 is a schematic view of the mandrel of FIG. 1;

FIG. 4 is a schematic view of the receiving basket of FIG. 1;

FIG. 5 is a left side view of FIG. 4;

FIG. 6 is a right side view of FIG. 4;

in the figure:

1. an upper joint; 101. a roof guard plate; 102. a connector body; 200. a mandrel; 201. a ball head; 202. a connector; 203. a split pin hole; 300. a first auger; 301. a first auger shaft sleeve; 302. a first auger blade; 400. an isolation sleeve; 500. a second auger; 501. a second auger shaft sleeve; 502. a second auger blade; 600. a receiving basket; 601. a support sleeve; 602. a support bar; 603. a support ring; 604. an outer cylinder; 605. a base plate; 606. screening holes; 607. a central bore; 608. a weep hole; 700. and a cotter pin.

Detailed Description

The utility model discloses an embodiment 1 of oily charge pump producing well of diving prevents junk device, as shown in fig. 1-6, oily charge pump of diving prevents junk device (hereinafter for short prevent junk device) connects the lower part at oily charge pump bottom oily motor of diving when using. The falling object prevention device comprises a mandrel 200 extending up and down, the upper end of the mandrel 200 is connected with an upper connector 1 used for connecting the submersible motor, and the auger and the receiving basket 600 are rotatably sleeved on the mandrel 200 from top to bottom.

The structure of the mandrel 200 is as shown in fig. 3, the upper end of the mandrel 200 is provided with a ball head 201, the lower end of the rod body of the mandrel 200 is provided with a connector 202, the connector 202 is provided with an external thread for installing a locking nut and an open pin hole 203 for inserting a split pin 700, the locking nut is used for stopping the receiving basket 600 upwards to prevent the receiving basket 600 from falling off, and the split pin 700 is used for preventing the locking nut from falling off in an inverted manner.

The upper end of the mandrel 200 is connected with an upper joint 1, the upper joint 1 is a pipe body, the upper end of the upper joint is an internal thread used for being connected with a double male screw thread, the upper joint 1 can be connected to a female screw thread at the lower end of a motor of the submersible electric pump through a double male screw thread short section, a top-preventing plate 101 is arranged inside the upper joint 1, the top-preventing plate 101 is a circular plate and used for blocking a ball head 201 at the upper end of the mandrel 200 and preventing the ball head 201 from upwards ejecting out of the upper joint 1, a reducing section located below the top-preventing plate 101 is arranged in the upper joint 1 and used for assembling the ball head 201 of the mandrel 200, a ball seat used for blocking and suspending the ball head 201 of the mandrel 200 is arranged at the lower end of the upper joint 1, a through hole is formed in the center of the ball seat, the diameter of the through hole is larger than that of the mandrel 200 but smaller than that of the ball head 201, so that a rod body of the mandrel 200 can pass through the through hole of the ball seat, but the ball head 201 cannot pass through hole, and when the mandrel 200 is used, the ball head 201 of the mandrel 200 is hung on the ball seat. Because the mandrel 200 is suspended on the ball seat of the upper joint 1 through the ball head 201, and the ball head 201 can rotate on the ball seat, the mandrel 200 can freely swing within the range of any angle, so as to counteract the vibration of the electric submersible pump during operation, and the running state of the electric submersible pump is not influenced.

The packing auger which is sleeved on the mandrel 200 in a rotating mode comprises a first packing auger 300 and a second packing auger 500 which are distributed up and down, the first packing auger 300 and the second packing auger 500 are similar in structure, but the rotating directions of blades are opposite. The first auger 300 comprises a first shaft sleeve and a first auger blade 302 fixed outside the first shaft sleeve, the first auger 300 is a forward-rotating auger, namely the first auger blade 302 rotates clockwise from top to bottom, the second auger 500 comprises a second shaft sleeve and a second auger blade 502 fixed outside the second shaft sleeve, and the second auger 500 is a reverse-rotating auger, namely the second auger blade 502 rotates anticlockwise from top to bottom. The first packing auger 300 and the second packing auger 500 are sleeved on the mandrel 200 through respective shaft sleeves, so that when the flexible falling objects pass through the blades of the packing augers, the flexible falling objects are firmly absorbed through the free rotation of the packing augers; the first auger 300 and the second auger 500 are opposite in rotation direction, so that the absorption probability of flexible falling objects can be increased, and the axial load of the device can be balanced.

An isolation shaft sleeve sleeved on the mandrel 200 is arranged between the first auger 300 and the second auger 500, and the isolation shaft sleeve is used for isolating the first auger 300 from the second auger 500. The isolating shaft sleeve is made of bakelite, and has low friction resistance and high wear resistance. The shaft sleeves of the first auger 300 and the second auger 500 can freely slide on the mandrel 200, and particularly freely slide and rotate in the upper space and the lower space of the isolation shaft sleeve on the mandrel 200, so that flexible falling objects can be received in all directions.

The receiving basket 600 is constructed as shown in fig. 4-6, and the receiving basket 600 is used to receive hard debris and filter the liquid entering the receiving basket 600. The receiving basket 600 comprises a hollow cylindrical outer cylinder 604, and a connecting sleeve and a bottom plate 605 which are fixed at the upper end and the lower end of the outer cylinder 604, wherein an upper mounting hole and a lower mounting hole for penetrating the mandrel 200 are respectively arranged on the connecting sleeve and the bottom plate 605, an inlet for the falling objects and liquid to enter is arranged at the upper end of the outer cylinder 604, a liquid leakage hole 608 and a sieve hole 606 are respectively arranged on the outer cylinder 604 and the bottom plate 605, and the liquid leakage hole 608 and the sieve hole 606 are both used for filtering the liquid entering the receiving basket 600. The receiving basket 600 is rotatably matched with the mandrel 200 through the upper mounting hole and the lower mounting hole, so that the receiving basket 600 freely rotates on the mandrel 200 and receives hard small fallen objects.

The connecting sleeve comprises a supporting ring 603 fixed at the upper end of the inner wall of the outer cylinder 604 and a supporting shaft sleeve 601 arranged in the center of the supporting ring 603 and used for being sleeved on the mandrel 200, a through hole in the supporting shaft sleeve 601 forms the upper mounting hole, the supporting shaft sleeve 601 is fixedly connected with the supporting ring 603 through a supporting rod 602, the supporting rods 602 are multiple and radially distributed between the supporting shaft sleeve 601 and the supporting ring 603, one end of each supporting rod 602 is fixedly connected with the supporting ring 603, the other end of each supporting rod is fixedly connected with the supporting shaft sleeve 601, and a gap between every two adjacent supporting rods 602 forms an inlet on the connecting sleeve. The upper end of the supporting shaft sleeve 601 extends out of the upper end of the outer cylinder 604, and the supporting shaft sleeve 601 is used for isolating the second packing auger 500 from the receiving basket 600.

The utility model discloses an embodiment 1 of oily charge pump oil recovery well of diving prevents junk device when using, figure 1 is shown, and the bulb 201 of dabber 200 upper end hangs on the ball seat of top connection 1, and first auger 300, isolation axle sleeve, second auger 500, receive basket 600 cover are on the body of rod of dabber 200, spin lock nut on the connector 202 of dabber 200 lower extreme, wear split pin 700, accomplish the installation. When the anti-falling device is installed, the upper joint 1 is connected to a female screw thread at the lower end of the motor of the electric submersible pump through a short section with double male screw threads.

When the device works, the first auger 300 and the second auger 500 of the anti-falling device are mainly used for receiving flexible falling objects, and the device can absorb the flexible falling objects such as cable sheaths, small flat sheaths, cable binding clamps, screw thread sealing adhesive tapes and the like which fall when an electric submersible pump is used for production and operation and a tubular column is pulled down. The receiving basket 600 is mainly used for receiving hard small drops, can receive the hard drops of some small drops when the submersible electric pump is in production operation and the tubular column and the unit are tripped out, and can be taken out of a shaft when the tubular column is tripped out along with operation; because the mandrel 200 is movably connected with the first auger 300, the second auger 500, the receiving basket 600 and other parts, the direction can be automatically adjusted when all parts of the device receive flexible and rigid falling objects, and the influence on the running state of the unit is reduced; the flexible falling objects such as cable clips, small flat sheath, sealing adhesive tape and the like generated in all production and maintenance processes can be adsorbed on the auger blade; while hard falling objects, such as small bolts, mechanical latches, etc., may be temporarily received by the receiving basket 600. When the unit is lifted out of the shaft in the electric pump operation construction, the flexible and rigid falling objects absorbed by the device are taken out of the shaft, so that the underground accident caused by accumulation of small underground falling objects in the electric submersible pump operation construction is avoided. After the pipe column is pulled out and the electric submersible pump is pulled out, the first packing auger 300, the second packing auger 500 and the receiving basket 600 in the anti-falling device are cleaned, and the anti-falling device can be used repeatedly.

The utility model discloses oily charge pump oil recovery well of diving prevents falling object device's embodiment 2: in example 1, the auger comprises a first auger and a second auger, and in example 2, only one auger is provided.

The utility model discloses oily charge pump oil recovery well of diving prevents embodiment 3 of thing device: in example 1, the receiving basket is movably sleeved on the mandrel, and in example 3, the receiving basket is fixedly sleeved on the mandrel.

Claims (10)

1. The anti-falling device for the oil production well of the electric submersible pump comprises a mandrel (200) extending up and down and a receiving basket (600) used for receiving hard falling objects, wherein the receiving basket (600) is provided with an inlet for the falling objects and liquid to enter and an outlet for filtering the liquid entering the receiving basket (600), the upper end of the mandrel (200) is connected with an upper connector (1) used for connecting the electric submersible pump, and the anti-falling device is characterized by further comprising a packing auger used for receiving the flexible falling objects, the packing auger comprises a shaft sleeve and packing auger blades fixed outside the shaft sleeve, and the packing auger is sleeved on the mandrel (200) through the rotation of the shaft sleeve and can slide on the mandrel (200) along the up-down direction; the receiving basket (600) comprises an outer barrel (604), and a connecting sleeve and a bottom plate (605) which are fixed at the upper end and the lower end of the outer barrel (604), wherein an upper mounting hole and a lower mounting hole which are used for penetrating the mandrel (200) are respectively arranged on the connecting sleeve and the bottom plate (605), and the receiving basket (600) is sleeved on the mandrel (200) through the upper mounting hole and the lower mounting hole and is positioned below the packing auger.

2. The oil-submersible electric pump oil production well falling object prevention device according to claim 1, characterized in that a ball head (201) is arranged at the upper end of the mandrel (200), the upper joint (1) is a pipe body, a ball seat for stopping and suspending the ball head (201) of the mandrel (200) is arranged at the lower end of the upper joint (1), a through hole is formed in the center of the ball seat, the diameter of the through hole is larger than that of the mandrel (200) but smaller than that of the ball head (201), so that a rod body of the mandrel (200) can pass through the through hole of the ball seat, the mandrel (200) is suspended on the ball seat of the upper joint (1) through the ball head (201), and the ball head (201) can rotate on the ball seat.

3. The anti-falling device for the oil production well with the electric submersible pump as claimed in claim 1, wherein the lower end of the rod body of the mandrel (200) is provided with the connector (202), the connector (202) is provided with an external thread for installing a locking nut, and the locking nut is used for stopping the receiving basket (600) upwards so as to prevent the receiving basket (600) from falling off.

4. The electric submersible pump oil recovery well anti-falling device according to claim 3, characterized in that the connector (202) is further provided with a cotter pin hole (203) for inserting a cotter pin (700), and the cotter pin (700) is used for preventing the locking nut from being reversed and falling off.

5. The electrical submersible pump production well anti-falling device according to claim 1, wherein the outlet of the receiving basket (600) comprises a liquid leakage hole (608) formed in the outer cylinder (604) and a sieve hole (606) formed in the bottom plate (605).

6. The electrical submersible pump production well anti-drop apparatus of claim 1, wherein the receiving basket (600) is rotationally engaged with the mandrel (200).

7. The electric submersible pump oil recovery well anti-falling device according to claim 6, wherein the connecting sleeve comprises a support ring (603) fixed at the upper end of the inner wall of the outer cylinder (604), and a support shaft sleeve (601) arranged in the center of the inner part of the support ring (603) and used for being sleeved on the mandrel (200), the through hole in the support shaft sleeve (601) forms the upper mounting hole, the support shaft sleeve (601) and the support ring (603) are fixedly connected through a support rod (602), one end of the support rod (602) is fixedly connected with the support ring (603), and the other end of the support rod is fixedly connected with the support shaft sleeve (601).

8. The electrical submersible pump production well anti-falling device according to claim 7, characterized in that the support rods (602) are provided in plurality and radially distributed between the support sleeve (601) and the support ring (603), and the gaps between adjacent support rods (602) form the inlet of the receiving basket (600).

9. The electric submersible pump oil recovery well anti-falling device according to any one of claims 1 to 8, wherein the packing auger comprises a first packing auger (300) and a second packing auger (500) which are distributed up and down, and an isolation shaft sleeve sleeved on the mandrel (200) is arranged between the first packing auger (300) and the second packing auger (500).

10. The oil-submersible electric pump oil production well anti-falling device according to claim 9, wherein the first auger (300) comprises a first shaft sleeve and a first auger blade (302) fixed outside the first shaft sleeve, the first auger blade (302) rotates clockwise from top to bottom, the second auger (500) comprises a second shaft sleeve and a second auger blade (502) fixed outside the second shaft sleeve, and the second auger blade (502) rotates counterclockwise from top to bottom.

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