CN212672035U

CN212672035U - Sand control pump arranged in middle of pipe column

Info

Publication number: CN212672035U
Application number: CN202020528553.5U
Authority: CN
Inventors: 马威; 商建营; 康伟伟; 康萍; 钱侃; 于光亮; 代立可; 毛巍巍; 栾睿智; 单海燕; 张颖; 贺梦琦
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2020-04-10
Filing date: 2020-04-10
Publication date: 2021-03-09
Anticipated expiration: 2030-04-10

Abstract

The utility model provides a arrange sand control pump at tubular column middle part in, include: an outer tube; the pump barrel is coaxially sleeved in the outer pipe at intervals, and a sand setting space is formed between the pump barrel and the outer pipe; the long plunger assembly comprises a piston body, a liquid inlet joint and a connecting rod, wherein the piston body is hermetically penetrated in the pump cylinder in a penetrating way, and can slide relative to the pump cylinder; and the bottom valve assembly is connected with the lower end of the pump barrel, and the lower end of the connecting rod penetrates through the bottom valve assembly and is arranged on the outer side of the bottom valve assembly. The beneficial effects of the utility model are that, through connecting rod and lower part sucker rod with the down-hole instrument of transmitting the beam-pumping unit reciprocating motion to needs power, can realize transmitting the purpose of the downhole instrument of lower extreme with power.

Description

Sand control pump arranged in middle of pipe column

Technical Field

The utility model relates to an oil-well pump field, concretely relates to arrange sand control pump at tubular column middle part in.

Background

The deep well is generally lifted by adopting a relay lifting mode, namely, a lifting pump is arranged at the lowest end and the middle part of a lifting pipe column, and deep fluid is lifted to the ground by adopting a two-stage lifting mode. The existing sand control pump can not be arranged in the middle of the pipe column generally, and particularly when an oil well pump at the lower end of the pipe column needs the oil pumping unit to provide power, the existing sand control pump can not be arranged in the middle of the pipe column completely and transmits the power to the lifting pump at the lowest end.

SUMMERY OF THE UTILITY MODEL

The utility model provides a arrange sand control pump at tubular column middle part in, reach the purpose that can transmit power to the downhole tool of lower extreme.

The utility model provides a technical scheme that its technical problem adopted is: a sand control pump placed in the middle of a pipe string, comprising: an outer tube; the pump barrel is coaxially sleeved in the outer pipe at intervals, and a sand setting space is formed between the pump barrel and the outer pipe; the long plunger assembly comprises a piston body, a liquid inlet joint and a connecting rod, wherein the piston body is hermetically penetrated in the pump cylinder in a penetrating way, and can slide relative to the pump cylinder; and the bottom valve assembly is connected with the lower end of the pump barrel, and the lower end of the connecting rod penetrates through the bottom valve assembly and is arranged on the outer side of the bottom valve assembly.

Further, the lower extreme of outer tube is provided with the lower clutch, and the upper end of bottom valve assembly is connected with the lower extreme of pump barrel, and the lower extreme outside of bottom valve assembly and the upper end inner wall butt of lower clutch.

Further, the base valve assembly includes: the upper end of the bottom valve seat is connected with the lower end of the pump barrel, and a conical valve hole is formed in the bottom valve seat in the axial direction; the conical traveling valve is sleeved and fixed on the periphery of the connecting rod and can move along with the connecting rod, and the conical traveling valve can be seated at the conical valve hole.

Further, the length of the long plunger assembly is larger than that of the pump barrel, and the upper end of the piston body is always arranged on the outer side of the upper end of the pump barrel.

Furthermore, the upper end and the lower end of the piston body are both provided with sand blocking rings, and the sand blocking rings are fixedly sleeved on the periphery of the piston body and can be sealed with the inner wall of the pump barrel.

Further, still include on the piston body and scrape the sand ring, set up and keep off between sand ring and the liquid inlet joint at piston body lower extreme department.

Furthermore, the outer pipe is connected with the pump barrel through a cross centralizer.

Further, the cross-shaped centering device is a plurality of and is arranged at the sand setting space at intervals.

Further, the upper end of the outer pipe is connected with an upper joint, and the inner wall of the lower end of the upper joint is provided with a guide inclined plane with the inner diameter gradually reduced.

Furthermore, a sand setting hole is formed in the guide inclined plane, the lower end of the sand setting hole is communicated with the sand setting space, and the axis of the sand setting hole is parallel to the axis of the outer pipe.

The beneficial effects of the utility model are that, connect its lower extreme continuation connection in the instrument in the pit after the connecting rod of plunger lower extreme passes the bottom valve assembly, through connecting rod and lower part sucker rod with the downward transmission of beam-pumping unit reciprocating motion to the lower part oil-well pump or the instrument that needs power, can realize transmitting the purpose of the instrument in the pit of lower extreme with power.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is an enlarged view of portion B of FIG. 1;

FIG. 4 is an enlarged view of portion C of FIG. 1;

fig. 5 is an enlarged view of a portion D in fig. 1.

Reference numbers in the figures: 1. an upper joint; 11. a guide ramp; 12. a sand setting hole; 2. an outer tube; 3. a pump barrel; 4. a cross centralizer; 5. a sand setting space; 6. a lower joint; 7. a base valve assembly; 71. a conical traveling valve; 8. a long plunger assembly; 81. a piston body, 82 and a sand blocking ring; 83. scraping a sand ring; 84. a liquid inlet joint; 85. a liquid inlet hole; 86. a connecting rod.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 1 to 5, the embodiment of the present invention provides a sand control pump disposed in the middle of a pipe string, which comprises an outer pipe 2, a pump barrel 3, a bottom valve assembly 7 and a long plunger assembly 8. The pump barrel 3 is coaxially sleeved in the outer pipe 2 at intervals, and a sand setting space 5 is formed between the pump barrel 3 and the outer pipe 2. The long plunger assembly 8 comprises a piston body 81, a liquid inlet joint 84 and a connecting rod 86, the piston body 81 is arranged in the pump cylinder 3 in a sealing penetrating mode, the piston body 81 can slide relative to the pump cylinder 3, the liquid inlet joint 84 is connected with the lower end of the piston body 81, a liquid inlet hole 85 is formed in the side face of the liquid inlet joint 84, the upper end of the connecting rod 86 is connected with the liquid inlet joint 84, the lower end of the connecting rod 86 is used for being connected with a downstream downhole tool, and the connecting rod 86 can move along with the piston body 81. The bottom valve assembly 7 is connected with the lower end of the pump barrel 3, and the lower end of the connecting rod 86 penetrates through the bottom valve assembly 7 and is arranged on the outer side of the bottom valve assembly 7.

The connecting rod 86 connected to the lower end of the plunger penetrates through the bottom valve assembly 7, and then the lower end of the plunger is continuously connected to a downhole tool (such as a lower sucker rod), and the reciprocating motion of the pumping unit is transmitted downwards to a lower oil well pump or a lower tool needing power through the connecting rod 86 and the lower sucker rod, so that the purpose of transmitting the power to the downhole tool at the lower end can be achieved.

The embodiment of the utility model provides an in, the lower extreme of outer tube 2 is provided with lower clutch 6, and the upper end of bottom valve assembly 7 is connected with the lower extreme of pump barrel 3, the outside upper end inner wall butt with lower clutch 6 of lower extreme of bottom valve assembly 7. Namely, the upper end of the lower joint 6 is of a brush thread structure, and the inner and outer peripheries of the upper end of the lower joint are provided with corresponding threads.

As shown in fig. 1, the base valve assembly 7 includes a base valve seat and a conical traveling valve 71. The upper end of the bottom valve seat is connected with the lower end of the pump barrel 3, and the bottom valve seat is provided with a conical valve hole along the axial direction. The conical traveling valve 71 is sleeved and fixed on the periphery of the connecting rod 86 and can move along with the connecting rod 86, the conical traveling valve 71 can be seated at the conical valve hole, and fluid can push the conical traveling valve 71 to move upwards continuously.

In the embodiment of the utility model provides an in, above-mentioned long plunger assembly 8's length is greater than the length of pump barrel 3, and the upper end outside of pump barrel 3 is arranged in all the time to the upper end of piston body 81. In the pumping process, the upper end of the plunger is always exposed out of the pump barrel, so that sand grains can be reduced to fall between the long plunger assembly 8 and the pump barrel 3 in the sand settling process, and the pump blockage is avoided.

Preferably, the upper end and the lower end of the piston body 81 are provided with sand blocking rings 82, and the sand blocking rings 82 are fixedly sleeved on the periphery of the piston body 81 and can be sealed with the inner wall of the pump barrel 3. The piston body 81 further comprises a sand scraping ring 83 which is arranged between the sand blocking ring 82 at the lower end of the piston body 81 and the liquid inlet joint 84. The provision of the sand-blocking ring 82 and the sand-scraping ring 83 prevents fine particles from entering the gap between the piston body 81 and the pump barrel 3 during pumping, which causes seizure, and is a mechanism of seizure prevention of the pump.

As shown in fig. 1, the outer tube 2 is connected to the pump barrel 3 through a cross centralizer 4. The cross-shaped centralizer 4 is a plurality of and is arranged at the sand setting space 5 at intervals. The cross centralizer 4 does not hinder the sand deposition and at the same time avoids occupying too much volume of the sand deposition space 5.

When fluid containing sand in a well passes through the sand control screen pipe at the suction inlet, the thicker sand is blocked by the sand control screen pipe, liquid containing the thinner sand passes through the sand control screen pipe and then goes upwards through a lower tool or an oil well pump and a pump tail pipe, the traveling conical valve component of the sand control pump is jacked open to enter a pump barrel of the sand control pump and enter a plunger through a liquid inlet hole of a liquid inlet joint, the conical traveling valve 71 in the plunger is jacked open to enter an oil pipe of the pump and go upwards continuously, and in the process of going upwards again, part of sand is deposited downwards to enter an annular sand settling space 5 between the pump barrel 3 and an outer pipe 2 due to the gravity differentiation.

It should be noted that, in the embodiment of the present invention, the sand settling space 5 is composed of the annular space between the outer tube 2 and the pump barrel 3, and the sand settling space 5 can be increased by increasing the length of the outer tube 2 as required, so that the pump is applicable to the oil well with large sand output. The method comprises the following specific steps: the upper end of the pump barrel 3 is connected with an oil pipe, the sand setting space is enlarged by lengthening the outer pipe 2, and the number of the outer pipe 2 and the number of oil pipes on the pump can be 1-10.

The upper end of the outer pipe 2 is connected with an upper joint 1, and the inner wall of the lower end of the upper joint 1 is provided with a guide inclined surface 11 with gradually reduced inner diameter. The guide inclined plane 11 is provided with a sand setting hole 12, the lower end of the sand setting hole 12 is communicated with the sand setting space 5, and the axis of the sand setting hole 12 is parallel to the axis of the outer pipe 2.

The guide inclined plane 11 and the sand settling hole 12 can guide the settled sand particles to enter the sand settling space 5 for settling, so that the pump blockage caused by the excessive sand particles flowing to the gap between the piston body 81 and the pump cylinder 3 is avoided.

The embodiment of the utility model provides a theory of operation as follows: when fluid containing sand in a well passes through the sand control screen pipe of the suction inlet, the thicker sand is blocked by the sand control screen pipe, liquid containing the thinner sand passes through the sand control screen pipe and then goes upward through a lower tool or an oil well pump and a pump tail pipe, the top-opened conical traveling valve 71 enters the pump cylinder 3 and enters the piston body 81 through the liquid inlet hole 85 of the liquid inlet joint 84, the traveling valve in the piston body 81 is pushed open to enter the oil pipe of the pump and then goes upward continuously, and in the process of the upward liquid, due to the gravity differentiation, part of the sand is deposited downward and enters the annular sand settling space 5 between the pump cylinder 3 and the outer pipe 2, namely the sand settling process and mechanism of the pump.

In the pumping process, the upper end of the piston body 81 is exposed outside the pump cylinder forever, the piston body 81 and the pump cylinder 3 form clearance seal, the upper part and the lower part of the piston body 81 are provided with sand blocking rings 80, and the lower part of the piston body 81 is provided with a sand scraping ring 83, so that the phenomenon that fine particles enter a clearance between the piston body 81 and the pump cylinder 3 to cause pump blockage in the pumping process can be avoided, which is another anti-blockage mechanism of the pump.

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:

1. the suction inlet sand control screen pipe is separated from the pump barrel body, so that the pump can be installed in the middle of the lifting pipe column.

2. The sand setting space is formed by the annular space of outer tube and pump barrel, can increase the sand setting space through the mode that increases outer tube length as required for the applicable oil well that is big with the sand output of this pump.

3. The sand control pump can continuously transmit the power of the oil pumping unit downwards to an oil well pump or a tool at the lower end.

The above description is only for the specific embodiments of the present invention, and the scope of the present invention can not be limited by the embodiments, so that the replacement of the equivalent components or the equivalent changes and modifications made according to the protection scope of the present invention should still belong to the scope covered by the present patent. In addition, the utility model provides an between technical feature and the technical feature, between technical feature and the technical scheme, all can the independent assortment use between technical scheme and the technical scheme.

Claims

1. The utility model provides a arrange sand control pump in tubular column middle part in which characterized in that includes:

an outer tube (2);

the pump barrel (3) is coaxially sleeved in the outer pipe (2) at intervals, and a sand setting space (5) is formed between the pump barrel (3) and the outer pipe (2);

the long plunger assembly (8) comprises a piston body (81), a liquid inlet joint (84) and a connecting rod (86), wherein the piston body (81) is hermetically arranged in the pump cylinder (3) in a penetrating mode, the piston body (81) can slide relative to the pump cylinder (3), the liquid inlet joint (84) is connected with the lower end of the piston body (81), a liquid inlet hole (85) is formed in the liquid inlet joint (84), the upper end of the connecting rod (86) is connected with the liquid inlet joint (84), the lower end of the connecting rod (86) is used for being connected with a downstream downhole tool, and the connecting rod (86) can move along with the piston body (81);

the bottom valve assembly (7) is connected with the lower end of the pump barrel (3), and the lower end of the connecting rod (86) penetrates through the bottom valve assembly (7) and is arranged on the outer side of the bottom valve assembly (7).

2. The sand control pump placed in the middle of a pipe string as claimed in claim 1, wherein the lower end of the outer pipe (2) is provided with a lower joint (6), the upper end of the bottom valve assembly (7) is connected with the lower end of the pump barrel (3), and the outer part of the lower end of the bottom valve assembly (7) is abutted against the inner wall of the upper end of the lower joint (6).

3. Sand control pump placed in the middle of a pipe string according to claim 2, characterized in that the bottom valve assembly (7) comprises:

the upper end of the bottom valve seat is connected with the lower end of the pump barrel (3), and a conical valve hole is formed in the bottom valve seat along the axial direction;

the conical traveling valve (71) is sleeved and fixed on the periphery of the connecting rod (86) and can move along with the connecting rod (86), and the conical traveling valve (71) can be set at the conical valve hole.

4. The sand control pump placed in the middle of a pipe string as claimed in claim 1, wherein the length of the long plunger assembly (8) is greater than that of the pump barrel (3), and the upper end of the piston body (81) is always placed outside the upper end of the pump barrel (3).

5. The sand control pump placed in the middle of a pipe string as claimed in claim 4, wherein the upper end and the lower end of the piston body (81) are provided with sand blocking rings (82), and the sand blocking rings (82) are fixedly sleeved on the periphery of the piston body (81) and can be sealed with the inner wall of the pump barrel (3).

6. The sand control pump placed in the middle of a pipe string as recited in claim 5, wherein the piston body (81) further comprises a sand scraping ring (83) disposed between the sand blocking ring (82) and the liquid inlet joint (84) at the lower end of the piston body (81).

7. The sand control pump placed in the middle of a pipe string according to claim 1, wherein the outer pipe (2) and the pump barrel (3) are connected by a cross centralizer (4).

8. The sand control pump placed in the middle of a pipe string as claimed in claim 7, wherein the cross centralizer (4) is provided in plurality at intervals at the sand settling space (5).

9. The sand control pump placed in the middle of a pipe string according to claim 1, wherein the upper end of the outer pipe (2) is connected with an upper joint (1), and the inner wall of the lower end of the upper joint (1) is provided with a guide slope (11) having an inner diameter gradually decreasing.

10. The sand control pump placed in the middle of a pipe string according to claim 9, wherein a sand setting hole (12) is provided at the guide slope (11), the lower end of the sand setting hole (12) communicates with the sand setting space (5), and the axis of the sand setting hole (12) is parallel to the axis of the outer pipe (2).