CN211230813U - Screw pump lifting pipe column - Google Patents

Abstract

The utility model relates to a screw pump lifts tubular column, including sucker rod, driving screw, urceolus, screw pump and drive driving screw pivoted screw drive, wherein: the screw driving device comprises a central tube, the central tube is rotatably arranged in the outer tube, the driving screw is arranged in the central tube along the vertical direction, a limiting pin can be pivoted on the inner wall of the central tube in an upward unidirectional overturning manner, and the end part of the limiting pin is slidably arranged in a thread groove on the outer wall of the driving screw; the top of the driving screw is connected with the bottom of the sucker rod, the bottom of the central tube is connected with the rotor of the screw pump, the bottom of the outer tube is connected with the stator of the screw pump, and the central tube is provided with a liquid inlet hole communicated with the inner cavity of the screw pump. The utility model provides an use the screw pump easily to cause the cracked technical problem of sucker rod in the deep well.

Description

Screw pump lifting pipe column

Technical Field

The utility model relates to an oil reservoir exploitation field especially relates to a screw pump lifts tubular column.

Background

In the oil deposit exploitation process, the screw pump has certain sand blocking prevention capacity compared with a plunger oil well pump, and also has the advantages of capability of pumping liquid with certain viscosity, stable pumping and the like. In the process of lifting the underground liquid, the screw pump drives a screw pump rotor to rotate through the rotation of the sucker rod above the screw pump, so that the underground liquid is lifted. However, when the screw pump is driven to a depth of more than 1500 m, the rod breakage is very likely to happen due to the large torque borne by the sucker rod, and the motor and the matched downhole cable are needed to be driven to work under the well to drive the screw pump.

Aiming at the problem that the sucker rod is easy to break when a screw pump is used in a deep well in the related art, an effective solution is not provided at present.

Therefore, the inventor provides the screw pump lifting pipe column by virtue of experience and practice of related industries for many years so as to overcome the defects in the prior art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a screw pump lifts tubular column need not to go into equipment such as downhole motor and cable down, drives the sucker rod through the ground beam-pumping unit and is reciprocating motion from top to bottom, can drive the rotor of screw pump and rotate, has overcome because the too big cracked problem of sucker rod that easily leads to of sucker rod running torque, improves the degree of depth and application scope under the screw pump, guarantees to lift the normal of work, stably going on to liquid in the pit.

The purpose of the utility model can be realized by adopting the following technical scheme:

the utility model provides a screw pump lifts tubular column, screw pump lifts the tubular column and includes sucker rod, driving screw, urceolus, screw pump and drive driving screw pivoted screw drive arrangement, wherein:

the screw driving device comprises a central tube, the central tube is rotatably arranged in the outer tube, the driving screw is arranged in the central tube along the vertical direction, a limiting pin can be pivoted on the inner wall of the central tube in an upward unidirectional overturning manner, and the end part of the limiting pin is slidably arranged in a thread groove on the outer wall of the driving screw;

the top end of the driving screw rod is connected with the bottom end of the sucker rod, the bottom end of the central tube is connected with a rotor of the screw pump, the bottom end of the outer tube is connected with a stator of the screw pump, and the central tube is provided with a liquid inlet hole communicated with an inner cavity of the screw pump.

In a preferred embodiment of the present invention, the outer cylinder and the central tube are all disposed along a vertical direction, a gap is left between the outer wall of the central tube and the inner wall of the outer cylinder, and the top outer wall and the bottom outer wall of the central tube correspond to the top inner wall and the bottom inner wall of the outer cylinder and are connected in a rotatable manner.

In a preferred embodiment of the present invention, the top inner wall of the outer tube and the top outer wall of the central tube are provided with a first bearing therebetween, the top outer wall of the central tube is followed the circumferential direction of the central tube is provided with an annular positioning boss, and the bottom of the positioning boss and the top of the inner ring of the first bearing are abutted against each other to be connected.

In a preferred embodiment of the present invention, a second bearing is disposed between the bottom inner wall of the outer cylinder and the bottom outer wall of the central tube.

In a preferred embodiment of the present invention, the bottom end of the central tube is connected to the top end of the rotor of the screw pump through a planetary gear.

The utility model discloses an in a preferred embodiment, fixed pivot and the stopper of being provided with on the inner wall of center tube, the one end of spacer pin can the pivoted cover be established in the pivot, the other end of spacer pin stretch into extremely in the thread groove on the driving screw outer wall and with the inner wall of thread groove supports to lean on the connection, the stopper is located the below of pivot, and the bottom of spacer pin with the top of stopper is supported and is leaned on the connection.

The utility model discloses an in a preferred embodiment, the bottom at the center tube is seted up in the feed liquor hole, the inside cavity of screw pump be for forming in the rotor of screw pump with infusion cavity between the stator of screw pump, infusion cavity passes through the feed liquor hole with the inside intercommunication of center tube.

In a preferred embodiment of the present invention, the oil pipe anchor, the sand prevention pipe and the sand settling pipe are sequentially connected to the lower portion of the stator of the screw pump, and the bottom end of the sand settling pipe is provided with a plug.

The utility model discloses an in a preferred embodiment, the sucker rod is located the oil pipe, the sucker rod with oil pipe all sets up along vertical direction, oil pipe's bottom with the top of urceolus is connected.

In a preferred embodiment of the present invention, the sucker rod is provided with a plurality of centralizers at intervals from top to bottom.

In a preferred embodiment of the present invention, the pumping rod is connected with a weight rod.

From top to bottom, the utility model discloses screw pump lifts the characteristics and the advantage of tubular column are: the pumping rod is connected with the top end of a driving screw rod, a rotor of a screw pump is connected with the bottom end of a central tube, the driving screw rod is arranged in the central tube, a limiting pin capable of being turned upwards in a one-way mode is arranged on the inner wall of the central tube, the end portion of the limiting pin is located in a thread groove on the outer wall of the driving screw rod, when the pumping rod drives the driving screw rod to move downwards in the central tube, the limiting pin can slide along the thread groove on the outer wall of the driving screw rod, the central tube and the rotor of the screw pump connected with the central tube are driven to rotate through the limiting pin, the screw pump can be driven to normally work through the downward movement; when the sucker rod drives the driving screw to move upwards in the central tube, the limiting pin is abutted against the inner wall of the thread groove to turn upwards, the limiting pin cannot obstruct the driving screw to move upwards, the limiting pin and the central tube do not rotate in the process, and the rotor of the screw pump cannot be driven to rotate.

Drawings

The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:

FIG. 1: does the structure schematic diagram of the screw pump lifting pipe column of the utility model.

FIG. 2: which is a partial enlargement of the position a in fig. 1.

FIG. 3: which is a partial enlarged view of the position B in fig. 1.

FIG. 4: do the utility model discloses the structure schematic diagram of sucker rod in screw pump lifting string.

Reference numerals in the prior art:

1. an oil pipe; 2. An outer cylinder;

3. a stator; 4. Tubing anchor;

5. a sand control pipe; 6. A sand setting pipe;

7. plugging with a thread; 8. A drive screw;

9. a screw drive device; 901. A central tube;

9011. positioning the boss; 9012. A liquid inlet hole;

902. a first bearing; 903. A second bearing;

904. a spacing pin; 905. A rotating shaft;

906. a limiting block; 10. A rotor;

11. a sucker rod; 12. A centralizer;

13. and a weight bar.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings.

As shown in fig. 1, the utility model provides a screw pump lifts tubular column, this screw pump lifts tubular column includes sucker rod 11, driving screw 8, urceolus 2, screw pump and screw drive device 9, and screw drive device 9 is used for driving screw 8 and rotates, wherein: the screw driving device 9 comprises a central tube 901 and a limit pin 904 capable of being turned upwards in a one-way manner, the outer tube 2 and the central tube 901 are both cylindrical structures arranged along the vertical direction, the central tube 901 is rotatably arranged in the outer tube 2, the driving screw 8 is arranged in the central tube 901 along the vertical direction, the limit pin 904 is pivoted on the inner wall of the central tube 901 in a one-way manner capable of being turned upwards, and the end part of the limit pin 904 is slidably arranged in a thread groove on the outer wall of the driving screw 8; the top end of the driving screw 8 is fixedly connected with the bottom end of the sucker rod 11 through a screw thread, the bottom end of the central tube 901 is connected with the top end of a rotor 10 of the screw pump, the bottom end of the outer tube 2 is connected with the top end of a stator 3 of the screw pump, and a liquid inlet hole communicated with an inner cavity of the screw pump is formed in the central tube.

The utility model discloses in, with the bottom of sucker rod 11 and the top fixed connection of drive screw 8, the top of the rotor 10 of screw pump and the bottom fixed connection of center tube 901, and set up drive screw 8 in center tube 901, be provided with the spacer pin 904 that can upwards one-way upset on the inner wall of center tube 901, because the tip of spacer pin 904 is located the thread groove on the drive screw 8 outer wall, when sucker rod 11 drives drive screw 8 and descends in center tube 901, spacer pin 904 can slide along the thread groove on the drive screw 8 outer wall, thereby drive center tube 901 and the rotor 10 of the screw pump that is connected with center tube 901 through spacer pin 904 and rotate, make and can drive the normal work of screw pump through descending of sucker rod 11, accomplish the lifting to liquid in the well; when the sucker rod 11 drives the driving screw 8 to move upwards in the central tube 901, the limit pin 904 is abutted by the inner wall of the thread groove to turn upwards, therefore, the limit pin 904 cannot obstruct the upward movement of the driving screw 8, the limit pin 904 and the central tube 901 do not rotate in the process, and the rotor 10 of the screw pump cannot be driven to rotate, the whole lifting process of liquid can be completed by driving the sucker rod 11 to do vertical reciprocating movement through a ground pumping unit, and other equipment such as a downhole motor, a downhole cable and the like is not needed to be put in, the structure is simple, the operation and control are simple and convenient, the construction cost is saved, the problem that the sucker rod 11 is easy to break due to overlarge rotating torque of the sucker rod 11 is solved, the downward depth and the application range of the screw pump are effectively improved, and the normal and stable operation.

In an optional embodiment of the present invention, as shown in fig. 1, the central tube 901 is disposed along the axial direction of the outer tube 2, and a gap is left between the outer wall of the central tube 901 and the inner wall of the outer tube 2, the top outer wall of the central tube 901 and the top inner wall of the outer tube 2 can be rotatably connected, the bottom outer wall of the central tube 901 and the bottom inner wall of the outer tube 2 can be rotatably connected, and by disposing two rotation connection positions at the top and the bottom of the central tube 901, the stability of the central tube 901 during rotation in the outer tube 2 is improved.

Specifically, as shown in fig. 1 to 3, a first bearing 902 is arranged between the top inner wall of the outer cylinder 2 and the top outer wall of the center tube 901, an annular positioning boss 9011 is arranged on the top outer wall of the center tube 901 along the circumferential direction of the center tube 901, and the bottom of the positioning boss 9011 is connected with the top of the inner ring of the first bearing 902 in an abutting manner; a second bearing 903 is provided between the bottom inner wall of the outer cylinder 2 and the bottom outer wall of the center tube 901. Through the setting of first bearing 902 and second bearing 903, improve the stability of center tube 901 when urceolus 2 internal rotation, guarantee that center tube 901 rotates smoothly.

The utility model discloses an optional embodiment, as in fig. 1, as shown in fig. 2, fixed pivot 905 and the stopper 906 of being provided with on the inner wall of center tube 901, the both ends of pivot 905 are fixed respectively on the inner wall of center tube 901, the spacer pin 904 sets up along the horizontal direction, the one end of spacer pin 904 can the pivoted cover establish in pivot 905, the other end of spacer pin 904 stretches into the thread groove to on the 8 outer walls of drive screw, and the tip of spacer pin 904 and the inner wall of thread groove support to lean on and be connected, stopper 906 is located the below of pivot 905, and the bottom of spacer pin 904 and the top of stopper 906 support to lean on and be connected, stop the rotation direction of spacer pin 904 through stopper 906, make the spacer pin 904 only can upwards overturn.

In an optional embodiment of the present invention, as shown in fig. 1 and fig. 3, the number of the liquid inlet holes 9012 is plural, the top end of the rotor 10 of the screw pump is connected to the middle position of the bottom end of the central tube 901, and each liquid inlet hole 9012 is opened at the bottom end of the central tube 901 and is located outside the connection position with the rotor 10 of the screw pump. The inner cavity of the screw pump is a liquid feeding cavity formed between the rotor 10 of the screw pump and the stator 3 of the screw pump, and the liquid feeding cavity is communicated with the inside of the central pipe 901 through a liquid inlet hole 9012. When lifting the liquid in the well, the liquid sucked into the infusion chamber enters the central tube 901 through the liquid inlet hole 9012, enters the oil pipe 1 through the central tube 901, and is lifted to the ground through the oil pipe 1.

In this embodiment, the central tube 901 is connected to the rotor 10 of the screw pump through a planetary gear, a gear ring is fixedly connected to the middle position of the bottom end of the central tube 901, the top end of the rotor 10 of the screw pump is fixedly connected to the middle of the sun gear, the planetary gear is arranged between the sun gear and the gear ring and respectively meshed with the sun gear and the gear ring, and the rotation of the central tube 901 is transmitted to the rotor 10 of the screw pump through the planetary gear, so as to drive the rotor 10 of the screw pump to rotate.

In an optional embodiment of the present invention, as shown in fig. 4, an oil pipe anchor 4, a sand prevention pipe 5 and a sand setting pipe 6 are connected in sequence below the stator 3 of the screw pump, and a bottom end of the sand setting pipe 6 is provided with a plug 7. The problem that the stator 3 of the screw pump is disengaged from the sand prevention pipe 5 in the working process of the screw pump can be effectively solved by arranging the oil pipe anchor 4.

Specifically, the bottom end of a stator 3 of the screw pump is fixedly connected with the top end of an oil pipe anchor 4 through a screw thread, the bottom end of the oil pipe anchor 4 is fixedly connected with the top end of a sand prevention pipe 5 through a screw thread, the bottom end of the sand prevention pipe 5 is fixedly connected with the top end of a sand setting pipe 6 through a screw thread, and the bottom end of the sand setting pipe 6 is fixedly connected with a screw plug 7 through a screw thread.

In an optional embodiment of the present invention, as shown in fig. 1, the sucker rod 11 is located in the oil pipe 1, the sucker rod 11 and the oil pipe 1 are both disposed along the vertical direction, and the bottom end of the oil pipe 1 is fixedly connected to the top end of the outer cylinder 2 through a screw thread.

In an optional embodiment of the present invention, as shown in fig. 4, a plurality of centralizers 12 are continuously and intermittently disposed on the pumping rod 11 from top to bottom, and a weighting rod 13 is connected to the pumping rod 11. Through centralizer 12 and the setting of weight rod 13, avoid sucker rod 11 to take place crooked when down, prevent sucker rod 11 excessive wearing and tearing, ensure the utility model discloses a screw pump lifts tubular column can be long-term, stable work, prolongs the cycle of overhauing, maintaining.

Further, the number of the centralizers 12 is at least ten.

The utility model discloses screw pump lifts the theory of operation of tubular column does: the bottom end of the sucker rod 11 is fixedly connected with a driving screw rod 8, the sucker rod 11 is put into the well, and the driving screw rod 8 is arranged in the central pipe 901, so that the installation of the lifting pipe column is completed. The pumping unit on the ground drives the pumping rod 11 to do reciprocating motion upwards and downwards, when the pumping rod 11 drives the driving screw 8 to move downwards in the central pipe 901, the limiting pin 904 slides along a thread groove on the outer wall of the driving screw 8, so that the central pipe 901 and the rotor 10 of the screw pump connected with the central pipe 901 are driven to rotate through the limiting pin 904, the screw pump can be driven to normally work through the downward movement of the pumping rod 11, liquid in the well enters a liquid conveying cavity between the rotor 10 of the screw pump and a stator 3 of the screw pump through the sand prevention pipe 5, enters the central pipe 901 through the liquid inlet hole 9012, finally enters the oil pipe 1 through the central pipe 901 and is lifted to the ground, and the lifting of the liquid in the well is completed; when the sucker rod 11 drives the driving screw 8 to move upwards in the central tube 901, the limit pin 904 is supported by the inner wall of the thread groove to turn upwards, the limit pin 904 cannot obstruct the upward movement of the driving screw 8, and the limit pin 904 and the central tube 901 do not rotate in the process and cannot drive the rotor 10 of the screw pump to rotate.

The utility model discloses screw pump lifts tubular column's characteristics and advantage are:

the screw pump lifting pipe column drives the sucker rod 11 to do up-and-down reciprocating motion through the ground pumping unit in the working process, the rotor 10 of the screw pump can be driven to rotate, other devices such as a downhole motor and a downhole cable do not need to be lowered, the structure is simple, the operation and the control are simple and convenient, the construction cost is saved, the problem that the sucker rod 11 is easy to break due to the fact that the sucker rod 11 rotates with overlarge torque is solved, the lowering depth and the application range of the screw pump are effectively improved, and normal and stable operation of lifting downhole liquid is guaranteed.

Two, this screw pump lifts among the tubular column sucker rod 11 from top to bottom and is provided with a plurality of centralizer 12, in addition, still is connected with the weight bar 13 on sucker rod 11, through centralizer 12 and weight bar 13's setting, avoids sucker rod 11 to take place crooked when down, prevents sucker rod 11 excessive wear, ensures the utility model discloses a screw pump lifts the tubular column can be long-term, steady operation, prolongs the cycle of overhauing, maintaining.

The above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention. Any person skilled in the art should also realize that such equivalent changes and modifications can be made without departing from the spirit and principles of the present invention.

Claims (11)

1. The utility model provides a screw pump lifts tubular column, its characterized in that, screw pump lifts tubular column includes sucker rod (11), driving screw (8), urceolus (2), screw pump and drives driving screw (8) pivoted screw drive arrangement (9), wherein:

the screw driving device (9) comprises a central tube (901), the central tube (901) is rotatably arranged in the outer tube (2), the driving screw (8) is arranged in the central tube (901) along the vertical direction, a limiting pin (904) can be pivoted on the inner wall of the central tube (901) in an upward unidirectional overturning manner, and the end part of the limiting pin (904) is slidably arranged in a thread groove on the outer wall of the driving screw (8);

the top end of the driving screw rod (8) is connected with the bottom end of the sucker rod (11), the bottom end of the central tube (901) is connected with a rotor (10) of the screw pump, the bottom end of the outer tube (2) is connected with a stator (3) of the screw pump, and a liquid inlet hole (9012) communicated with an inner cavity of the screw pump is formed in the central tube (901).

2. Screw pump lifting column according to claim 1, characterized in that the outer barrel (2) and the central tube (901) are arranged in a vertical direction, a gap is left between the outer wall of the central tube (901) and the inner wall of the outer barrel (2), and the top outer wall and the bottom outer wall of the central tube (901) are correspondingly connected with the top inner wall and the bottom inner wall of the outer barrel (2) in a rotatable manner.

3. The screw pump lifting column according to claim 2, wherein a first bearing (902) is arranged between the top inner wall of the outer cylinder (2) and the top outer wall of the central pipe (901), an annular positioning boss (9011) is arranged on the top outer wall of the central pipe (901) along the circumferential direction of the central pipe (901), and the bottom of the positioning boss (9011) is connected with the top of an inner ring of the first bearing (902) in an abutting mode.

4. Progressive cavity pump lifting column according to claim 2 or 3, characterized in that a second bearing (903) is arranged between the bottom inner wall of the outer cylinder (2) and the bottom outer wall of the central tube (901).

5. Screw pump lifting string according to claim 1, characterised in that the bottom end of the central tube (901) is connected to the top end of the rotor (10) of the screw pump by means of a planetary gear.

6. The screw pump lifting pipe column according to claim 1, wherein a rotating shaft (905) and a limiting block (906) are fixedly arranged on the inner wall of the central pipe (901), one end of the limiting pin (904) is rotatably sleeved on the rotating shaft (905), the other end of the limiting pin (904) extends into a threaded groove in the outer wall of the driving screw (8) and is connected with the inner wall of the threaded groove in an abutting mode, the limiting block (906) is located below the rotating shaft (905), and the bottom of the limiting pin (904) is connected with the top of the limiting block (906) in an abutting mode.

7. Screw pump lifting column according to claim 1, characterized in that the inlet hole (9012) opens at the bottom end of a central tube (901), the internal chamber of the screw pump being an infusion chamber formed between the rotor (10) of the screw pump and the stator (3) of the screw pump, the infusion chamber communicating with the inside of the central tube (901) through the inlet hole (9012).

8. Screw pump lifting column according to claim 1, characterized in that a tubing anchor (4), a sand control pipe (5) and a sand setting pipe (6) are connected in sequence below the stator (3) of the screw pump, and a plug (7) is arranged at the bottom end of the sand setting pipe (6).

9. Screw pump lifting column according to claim 1, characterized in that the sucker rod (11) is located in the oil pipe (1), the sucker rod (11) and the oil pipe (1) are both arranged in the vertical direction, and the bottom end of the oil pipe (1) is connected with the top end of the outer cylinder (2).

10. Screw pump lifting column according to claim 9, characterized in that the sucker rod (11) is provided with a plurality of centralizers (12) arranged in series and at intervals from top to bottom.

11. Progressive cavity pump lifting column according to claim 9, characterized in that a weighting rod (13) is connected to the sucker rod (11).

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