Oilfield underground tool screen pipe

Abstract

The utility model discloses an oil field underground tool screen pipe which comprises a screen pipe body, one end of the screen pipe body is connected with a connecting box, and the end, away from the screen pipe body, of the connecting box is provided with an oil inlet end. The oil filter is reasonable in structure and novel in design, when the oil filter is used, petroleum in an oil well enters the connecting box through the oil inlet end to be filtered, the petroleum can be filtered through the arranged screen, when the petroleum enters the connecting box and impacts on the screen, the impact force borne by the screen can be buffered through the arranged spring, and therefore the oil filter can be used for filtering the petroleum. The screen is protected, compared with a flat screen, the filtering face of the conical structure is increased, impurities filtered out of the screen can be collected to the two sides of the screen, the impurities collected to the two sides of the screen can enter the impurity box to be temporarily stored, the screen is cleaned, petroleum entering the connecting box impacts on the arc-shaped cover firstly, and the petroleum is filtered out through the arc-shaped cover. Petroleum is shunted, the petroleum is prevented from directly impacting the screen, and the screen is protected.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of screen pipe, in particular to an oilfield downhole tool screen pipe. BACKGROUND

[0002] In the oil field production field, because the oil layer is in the formation is different, in order to prevent silt into the oil well pump, screen pipe is an important protective tool.But the screen pipe in the prior art has the problems of easy clogging, easy damage when oil pressure is too large and difficult to disassemble and overhaul when using.For example, the patent number CN200520020996.9 is a kind of oilfield special stainless steel sand screen pipe.The main problem of the existing sand control pipe is poor sand control effect and short service life, the outer shaft of the screen pipe with slotted spacing is fixed with a rib, and the rib is wound with stainless steel wire.The oilfield special stainless steel sand screen pipe has the characteristics of good sand control performance and long service life.The screen pipe of the utility model has the problems of easy clogging and easy damage when oil pressure is too large. SUMMARY

[0003] In view of the deficiencies of the prior art, an oilfield downhole tool screen pipe is disclosed, which comprises a screen pipe body, a connecting box is connected to one end of the screen pipe body, an oil inlet end is provided at the end of the connecting box away from the screen pipe body;

[0004] A screen is slidably arranged in the connecting box, the screen is of a conical structure, slide rods are installed at the left and right ends of the screen, a sleeve is slidably sleeved in the slide rod, the sleeve is fixed to the connecting box, and the slide rod and the sleeve are connected by a spring.

[0005] The left and right side walls of the connecting box are connected with a sundry box, and the sundry box is communicated with the connecting box.

[0006] Preferably, a connecting column is installed on the screen, and an arc-shaped cover is installed at the end of the connecting column away from the screen.

[0007] Preferably, the connecting column is connected with the arc-shaped cover and the screen by a reinforcing rod at both ends.

[0008] Preferably, baffles are staggered in the sundry box.

[0009] The utility model has the following beneficial effects: the utility model has reasonable structure, novel design, when using, the oil in the oil well enters into the filter in the connecting box through the oil inlet end, the screen cloth can filter the oil, when the oil enters into the connecting box, impacts on the screen cloth, through the spring that sets up, can buffer the impact that screen cloth receives, protects the screen cloth, the screen cloth adopts the conical structure, the filter area of the conical structure is larger than the screen cloth of the flat plate, and the impurities filtered out on the screen cloth can be gathered to the both sides of the screen cloth, the impurities gathered to the both sides of the screen cloth can enter the impurity box and store temporarily, the screen cloth is cleaned, the oil in the connecting box first impacts on the arc cover, and the oil is divided, to avoid the oil directly impacting on the screen cloth, for protecting the screen cloth. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is a schematic front view of the utility model;

[0011] Figure 2 It is Figure 1 a schematic enlarged view.

[0012] In the drawing: 1 - screen pipe body, 2 - connecting box, 3 - oil inlet end, 4 - screen cloth, 5 - slide bar, 6 - sleeve, 7 - spring, 8 - impurity box, 9 - connecting column, 10 - arc cover, 11 - reinforcing rod, 12 - baffle. DETAILED DESCRIPTION

[0013] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0014] Please refer to Figures 1-2 , an oilfield downhole tool screen pipe, which comprises a screen pipe body 1, a filter screen is arranged in the screen pipe body 1, the screen pipe body 1 is connected with a connecting box 2 at one end, and the connecting box 2 is provided with an oil inlet end 3 away from the screen pipe body 1;

[0015] The oil enters the connecting box 2 through the oil inlet end 3 and is filtered, and then enters the screen pipe body 1 for further filtering;

[0016] A screen cloth 4 is slidably arranged in the connecting box 2, the screen cloth 4 has a conical structure, slide bars 5 are arranged at the left and right ends of the screen cloth 4, sleeves 6 are slidably sleeved in the slide bars 5, the sleeves 6 are fixed to the connecting box 2, the slide bars 5 and the sleeves 6 are connected through springs 7, clamping grooves are arranged in the sleeves 6, clamping blocks are slidably arranged in the clamping grooves, the clamping blocks are fixedly connected with the slide bars 5, so that the slide bars 5 are prevented from falling off;

[0017] The screen 4 can filter the oil. When the oil enters the connecting box 2, it impacts on the screen 4. The spring 7 can buffer the impact force on the screen 4 and protect the screen 4. The screen 4 has a conical structure. The conical structure can increase the filtering area compared with the flat screen and can collect the impurities on the screen 4 to the two sides of the screen 4.

[0018] The impurity box 8 is connected to the left and right sidewalls of the connecting box 2. The impurity box 8 has no cover.

[0019] The impurities collected to the two sides of the screen 4 can enter the impurity box 8 for temporary storage and clean the screen 4.

[0020] The connecting column 9 is installed on the screen 4. The arc-shaped cover 10 is installed on the end of the connecting column 9 away from the screen 4.

[0021] The oil entering the connecting box 2 first impacts on the arc-shaped cover 10 to divide the oil and avoid the oil directly impacting on the screen 4 to protect the screen 4.

[0022] The connecting column 9 is connected with the arc-shaped cover 10 and the screen 4 through the reinforcing rods 11 at both ends to reinforce the connection between the connecting column 9 and the arc-shaped cover 10 and the screen 4.

[0023] The baffles 12 are staggered in the impurity box 8 to prevent the impurities entering the impurity box 8 from floating out of the impurity box 8.

[0024] In use, the oil in the oil well enters the connecting box 2 through the oil inlet end 3 for filtration. The screen 4 can filter the oil. When the oil enters the connecting box 2, it impacts on the screen 4. The spring 7 can buffer the impact force on the screen 4 and protect the screen 4. The screen 4 has a conical structure. The conical structure can increase the filtering area compared with the flat screen and can collect the impurities on the screen 4 to the two sides of the screen 4. The impurities collected to the two sides of the screen 4 can enter the impurity box 8 for temporary storage and clean the screen 4. The oil entering the connecting box 2 first impacts on the arc-shaped cover 10 to divide the oil and avoid the oil directly impacting on the screen 4 to protect the screen 4.

[0025] In the description of the present application, it should be noted that unless specifically defined and limited otherwise, the terms'mounting', 'connection', 'linking', 'communication' should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements, or wireless connection, or wired connection. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0026] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An oilfield downhole tool screen, characterized by, It include screen pipe body (1), the screen pipe body (1) one end is connected with the connecting box (2), the connecting box (2) is away from screen pipe body (1) end is provided with the oil inlet end (3); The screen mesh (4) is conical structure, the screen mesh (4) is provided with the slide bar (5) on both ends, the slide bar (5) is slidably connected with the sleeve pipe (6), the sleeve pipe (6) is fixed on the connecting box (2), the slide bar (5) and the sleeve pipe (6) are connected by spring (7); The connecting box (2) left and right side wall is connected with the sundry box (8), the sundry box (8) is communicated with the connecting box (2).

2. An oilfield downhole tool screen as defined in claim 1, wherein, The connecting column (9) is installed on the screen mesh (4), and the arc-shaped cover (10) is installed at the end away from the screen mesh (4).

3. An oilfield downhole tool screen as defined in claim 2, wherein, The connecting column (9) is connected with the arc-shaped cover (10) and the screen mesh (4) through the reinforcing rod (11) respectively.

4. An oilfield downhole tool screen as defined in claim 1, wherein, The sundry box (8) is provided with the baffle (12) alternately.

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