CN211058777U - Expansion cleaning well bottom sieve tube - Google Patents
Expansion cleaning well bottom sieve tube Download PDFInfo
- Publication number
- CN211058777U CN211058777U CN201921908093.2U CN201921908093U CN211058777U CN 211058777 U CN211058777 U CN 211058777U CN 201921908093 U CN201921908093 U CN 201921908093U CN 211058777 U CN211058777 U CN 211058777U
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- expansion body
- filter screen
- ejector rod
- screen
- steel ball
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Abstract
The utility model provides an inflation washing shaft bottom screen pipe. Relates to the field of oil field downhole equipment. A chamfer is formed in a step hole in the central hole of the upper joint, a steel ball is arranged on the chamfer, the lower part of the steel ball is abutted against the upper ejector rod, the lower part of the upper ejector rod is connected with an expansion body, a lower ejector rod is arranged at the lower part of the expansion body, the lower part of the lower ejector rod is fixedly connected with a bottom cap, and the periphery of the bottom cap and the lower part of the upper joint are fixedly connected with a filter screen; the expansion body is a spindle-shaped hollow shell, the edge of the spindle-shaped middle part of the expansion body is in contact connection with the inner wall of the filter screen, and the expansion body is made of stainless steel spring steel; the filter screen is composed of triangular screen bars which are uniformly arranged and welded together along the circumference of the lower part of the upper joint and the circumference of the upper part of the bottom cap. The utility model discloses following beneficial effect has: the filter screen is cleaned by a one-way valve structure consisting of a steel ball and a central hole, a deformable expansion body and the filter screen through a pumping-discharging working process of the oil well pump.
Description
The technical field is as follows:
the utility model belongs to the technical field of the oil field equipment in the pit and specifically relates to inflation washing shaft bottom screen pipe.
Background art:
in order to prevent sand from entering the pump to abrade the oil well pump, the bottom of the oil well pump is generally provided with a sieve tube, the sieve tube is generally of a structure that a perforated steel tube is wrapped with a wire mesh, the sieve tube of the structure is used for passively intercepting and filtering the sand, the time is long, the filter mesh is blocked, the pump efficiency of the oil well pump is reduced, the pressure difference inside and outside the sieve tube is increased seriously, and the oil pumping pressure presses the filter mesh to cause the failure danger of the sieve tube.
The utility model has the following contents:
in order to solve the problems, the utility model provides an inflation washing shaft bottom screen pipe.
The technical scheme of the utility model is that: the expansion cleaning well bottom sieve tube comprises an upper connector, wherein a chamfer is formed in a step hole in a center hole of the upper connector, a steel ball is arranged on the chamfer, the lower part of the steel ball is abutted against an upper ejector rod, the lower part of the upper ejector rod is connected with an expansion body, a lower ejector rod is arranged at the lower part of the expansion body, the lower part of the lower ejector rod is fixedly connected with a bottom cap, and the periphery of the bottom cap and the lower part of the upper connector are fixedly connected;
the expansion body is a spindle-shaped hollow shell, the edge of the spindle-shaped middle part of the expansion body is in contact connection with the inner wall of the filter screen, and the expansion body is made of stainless steel spring steel;
the filter screen is composed of triangular screen bars which are uniformly arranged and welded together along the circumference of the lower part of the upper joint and the circumference of the upper part of the bottom cap.
One surface of the triangle of the triangular screen bar faces the direction of the circle center.
The utility model discloses following beneficial effect has: the utility model discloses a cleaning work to the filter screen is accomplished to the working process of utilizing the pump-out of oil-well pump to spit, when the oil-well pump is pumped, the steel ball floats on, when the oil-well pump is spit oil, steel ball 2 back to the landing and is located in the horn mouth, form the pressure of backward flow simultaneously, the steel ball oppresses the ejector pin, go up the ejector pin and oppress the inflation body, the inflation body warp, the fusiform waist diameter of inflation body grow, the triangle-shaped screen strip that oppresses the filter screen takes place elastic deformation, the bending outward, the gap of filter screen grows, because the triangle-shaped closed angle that the triangle-shaped screen strip is outside, the non-gap between two adjacent triangle-shaped screen strips diminishes from outside to inside gradually, the interception thing is blocked outside the gap, the downward liquid impact that produces when the steel ball falls back, can wash away the interception thing between the bar gap that blocks outwards to open, thereby accomplish the cleaning, the deformation of the filter screen is recovered, and the normal filtering precision is recovered.
Description of the drawings:
fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
fig. 3 is a working diagram of the present invention.
In the figure, 1-upper joint, 2-steel ball, 3-chamfer, 4-upper ejector rod, 5-expansion body, 6-lower ejector rod, 7-filter screen, 8-triangular sieve bar and 9-bottom cap.
The specific implementation mode is as follows:
the present invention will be further explained with reference to the accompanying drawings:
as shown in a figure 1 and figures 2-3, the expansion cleaning well bottom sieve tube comprises an upper connector 1, a chamfer 3 is formed in a step hole in a central hole of the upper connector 1, a steel ball 2 is arranged on the chamfer 3, the lower part of the steel ball 2 is abutted against an upper ejector rod 4, the lower part of the upper ejector rod 4 is connected with an expansion body 5, a lower ejector rod 6 is arranged at the lower part of the expansion body 5, the lower part of the lower ejector rod 6 is fixedly connected with a bottom cap 9, the periphery of the bottom cap 9 and the lower part of the upper connector 1 are fixedly connected with;
the expansion body 5 is a spindle-shaped hollow shell, the edge of the spindle-shaped middle part of the expansion body 5 is connected with the inner wall of the filter screen 7 in a propping manner, and the expansion body 5 is made of stainless steel spring steel;
the filter screen 7 is composed of triangular screen bars 8 which are uniformly arranged and welded together along the circumference of the lower part of the upper joint 1 and the circumference of the upper part of the bottom cap 9.
Triangle-shaped grating 8, a face of its triangle-shaped is arranged towards centre of a circle direction, and a closed angle that is triangle-shaped is outside towards the centre of a circle, two adjacent triangle-shaped gratings form to the narrow gap of centre of a circle direction gradually, at filterable in-process, the debris that are greater than filtering the gap are blocked outside the minimum gap, when this gap opens, is under the effect of rivers, debris are washed out the filter screen.
The utility model discloses a cleaning work to the filter screen is accomplished to the working process of utilizing the pump-out of oil-well pump to spit, when the oil-well pump is pumped, the steel ball floats on, when the oil-well pump is spit oil, steel ball 2 back to the landing and is located in the horn mouth, form the pressure of backward flow simultaneously, the steel ball oppresses the ejector pin, go up the ejector pin and oppress the inflation body, the inflation body warp, the fusiform waist diameter of inflation body grow, the triangle-shaped screen strip that oppresses the filter screen takes place elastic deformation, the bending outward, the gap of filter screen grows, because the triangle-shaped closed angle that the triangle-shaped screen strip is outside, the non-gap between two adjacent triangle-shaped screen strips diminishes from outside to inside gradually, the interception thing is blocked outside the gap, the downward liquid impact that produces when the steel ball falls back, can wash away the interception thing between the bar gap that blocks outwards to open, thereby accomplish the cleaning, the deformation of the filter screen is recovered, and the normal filtering precision is recovered.
Claims (2)
1. An expansion cleaning well screen, comprising an upper joint (1), characterized in that: a chamfer (3) is formed in a step hole in a center hole of the upper joint (1), a steel ball (2) is arranged on the chamfer (3), the lower part of the steel ball (2) is abutted against an upper ejector rod (4), the lower part of the upper ejector rod (4) is connected with an expansion body (5), a lower ejector rod (6) is arranged at the lower part of the expansion body (5), a bottom cap (9) is fixedly connected to the lower part of the lower ejector rod (6), and a filter screen (7) is fixedly connected to the periphery of the bottom cap (9) and the lower part of the upper joint (;
the expansion body (5) is a spindle-shaped hollow shell, the edge of the spindle-shaped middle part of the expansion body (5) is connected with the inner wall of the filter screen (7) in a propping manner, and the expansion body (5) is made of stainless steel spring steel;
the filter screen (7) is composed of triangular screen bars (8) which are uniformly arranged and welded together along the circumference of the lower part of the upper joint (1) and the circumference of the upper part of the bottom cap (9).
2. The expansion cleaned well screen of claim 1, wherein: the triangular screen bars (8) are arranged with one surface of the triangle facing to the direction of the circle center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921908093.2U CN211058777U (en) | 2019-11-07 | 2019-11-07 | Expansion cleaning well bottom sieve tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921908093.2U CN211058777U (en) | 2019-11-07 | 2019-11-07 | Expansion cleaning well bottom sieve tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211058777U true CN211058777U (en) | 2020-07-21 |
Family
ID=71588033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921908093.2U Active CN211058777U (en) | 2019-11-07 | 2019-11-07 | Expansion cleaning well bottom sieve tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211058777U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115369849A (en) * | 2022-09-23 | 2022-11-22 | 天津大学 | Device and method for controlling deformation of underground structure |
-
2019
- 2019-11-07 CN CN201921908093.2U patent/CN211058777U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115369849A (en) * | 2022-09-23 | 2022-11-22 | 天津大学 | Device and method for controlling deformation of underground structure |
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