Ash squeezing device for well repair operation of oil field

Abstract

The utility model discloses an oil field workover operation mortar squeezing device which comprises a casing pipe, a supporting seat is arranged at the top of the casing pipe, a fixing cylinder is arranged at the top of the supporting seat, and a mortar squeezing pipe column extending into the casing pipe is arranged at the bottom of the supporting seat. One end of the high-pressure pipe penetrates through the fixed cylinder and extends into the mortar squeezing pipe column; the limiting mechanism comprises a limiting ring and a movable block, the limiting ring is installed on the inner wall of the mortar squeezing pipe column, a groove is formed in the inner side face of the limiting ring, a spring is arranged at the bottom of the groove, one end of the movable block is embedded into the groove and connected with the spring, and the other end of the movable block extends out of the groove and is connected with an abutting block capable of abutting against the high-pressure pipe; a guide rod is arranged on the side surface of the abutting block, and a guide groove is formed in the limiting ring. The utility model has the beneficial effects that through the designed limiting mechanism, the high-pressure pipe arranged in the ash extrusion pipe column can be limited, and the high-pressure pipe is prevented from falling off during use.

Description

Technical Field

[0001] The utility model belongs to the technical field of oilfield well repair, and in particular relates to a ash squeezing device for oilfield well repair operation. Background Art

[0002] Oilfield workover refers to the operation of oil drilling and subsequent oil well maintenance, the purpose of which is to ensure the normal production and operation of the oil well. During the long-term exploitation process, due to various reasons, the oil well may have problems such as wellbore damage, well wall collapse, casing aging, etc. These problems will affect the production capacity and safety of the oil well, so workover operations are required to restore the integrity and function of the wellbore.

[0003] The patent discloses a ash squeezing device for oilfield well repair operations with the publication number CN201209423Y. The patent discloses that the device comprises a wellhead device, an ash squeezing pipe string, an artificial bottom hole and a casing. The ash squeezing pipe string is filled with a displacement fluid, a bridge plug mortar and a pre-fluid. The perforated well section on the casing wall contains a bridge plug agent and mortar in the outer formation. The wellhead device is connected to a ground mortar mixing tank through a high-pressure pipeline. The displacement fluid is composed of clean water and a retarder.

[0004] When the high-pressure pipe is placed inside the ash squeezing pipe column, it is not conducive to limiting the pipe. When in use, there is a problem that the high-pressure pipe falls off from the ash squeezing pipe column. Utility Model Content

[0005] The utility model aims to provide a ash squeezing device for oilfield well repairing operation, which can limit the high-pressure pipe placed in the ash squeezing pipe column.

[0006] To achieve the above purpose, the utility model provides the following technical solutions: an oilfield well repair operation ash squeezing device, comprising

[0007] A casing, wherein a support seat is arranged at the top of the casing, a fixing cylinder is arranged at the top of the support seat, and a ash squeezing column extending into the interior of the casing is arranged at the bottom of the support seat;

[0008] A high-pressure pipe, one end of which passes through the fixed cylinder and extends to the interior of the ash squeezing column;

[0009] The limiting mechanism includes a limiting ring and a movable block. The limiting ring is installed on the inner wall of the ash squeezing pipe column, and the inner side surface of the limiting ring is provided with a groove. A spring is provided at the bottom of the groove. One end of the movable block is embedded in the groove and connected to the spring, and the other end extends out of the groove and is connected to a block that can abut against the high-pressure pipe.

[0010] Preferably, a guide rod is provided on the side surface of the stop block, a guide groove is provided inside the limiting ring, and the guide rod is inserted into the inside of the guide groove.

[0011] Preferably, the guide rod and the movable block are an integrated structure, and the guide rod is a rectangular parallelepiped structure.

[0012] Preferably, the movable block and the stop block are an integrated structure, and the height of the ash squeezing pipe column is smaller than the height of the casing.

[0013] Preferably, the top of the support seat is provided with symmetrically distributed vertical rods, and the tops of the vertical rods are provided with horizontal rods.

[0014] Preferably, a lifting ear is installed on the top of the horizontal rod, and a flange is provided at one end of the high-pressure pipe.

[0015] Preferably, the vertical rod and the horizontal rod are an integrated structure, and the lifting ears and the horizontal rod are welded together.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The designed limiting mechanism can limit the high-pressure pipe placed in the ash squeezing pipe column to prevent the high-pressure pipe from falling off during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 It is a partial cross-sectional structural schematic diagram of the utility model;

[0020] Figure 3 For the utility model Figure 2 Schematic diagram of the enlarged structure of the E region;

[0021] Figure 4 For the utility model Figure 3 Schematic diagram of the enlarged structure of the M region;

[0022] In the figure: 1. casing; 2. support seat; 31. vertical rod; 32. horizontal rod; 33. lifting ear; 4. high-pressure pipe; 41. flange; 5. fixing cylinder; 6. ash squeezing pipe column; 7. limiting ring; 71. groove; 710. spring; 72. guide groove; 8. movable block; 81. stop block; 810. guide rod. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Example 1

[0025] See also Figure 1-Figure 4 , which is the first embodiment of the utility model, and provides an oilfield well repair operation ash squeezing device, comprising

[0026] Casing 1, a support seat 2 is arranged on the top of the casing 1, the support seat 2 can be erected on the casing 1, and a fixing tube 5 is arranged on the top of the support seat 2, realizing the addition of the fixing tube 5, and a ash squeezing column 6 extending to the inside of the casing 1 is arranged at the bottom of the support seat 2, realizing the addition of the ash squeezing column 6, and a gap is left between the ash squeezing column 6 and the casing 1. When the support seat 2 is lifted, it is convenient to add clean water through the gap between the ash squeezing column 6 and the casing 1, so that the oil on the well wall is returned from the ash squeezing column 6;

[0027] A high-pressure pipe 4, one end of which passes through the fixed tube 5 and extends to the interior of the ash squeezing pipe column 6, thereby realizing the additional installation of the high-pressure pipe 4;

[0028] The limiting mechanism includes a limiting ring 7 and a movable block 8. The limiting ring 7 is installed on the inner wall of the ash squeezing column 6, so that the limiting ring 7 is added. The inner side surface of the limiting ring 7 is provided with symmetrically distributed grooves 71, so that the grooves 71 are opened. A spring 710 is provided at the bottom of the groove 71, so that the spring 710 is added. One end of the movable block 8 is embedded in the groove 71 and connected with the spring 710, and the other end extends out of the groove 71 and is connected with a stop block 81 that can abut against the high-pressure pipe 4. The stop block 81 abuts against the high-pressure pipe 4 to limit the high-pressure pipe 4. When the high-pressure pipe 4 is inserted into the ash squeezing column 6 along the fixed tube 5, the support seat 2, and the limiting ring 7, the high-pressure pipe 4 squeezes the two stop blocks 81. After the stop block 81 is squeezed, it drives the movable block 8 to compress the spring 710. After the spring 710 is compressed, it resets, drives the movable block 8 to move, and makes the two stop blocks 81 clamped on the high-pressure pipe 4 to limit the added high-pressure pipe 4.

[0029] In this embodiment, preferably, a guide rod 810 is provided on the side surface of the stop block 81, thereby realizing the addition of the guide rod 810, and a guide groove 72 is opened inside the limiting ring 7, thereby realizing the addition of the guide groove 72. The guide rod 810 is inserted into the guide groove 72, and when the stop block 81 is squeezed and moved, the guide rod 810 is driven to move in the guide groove 72, thereby increasing the smoothness of the movement of the stop block 81.

[0030] In this embodiment, preferably, the guide rod 810 and the movable block 8 are an integrated structure, which helps to increase the strength of the guide rod 810 and the movable block 8, and the guide rod 810 is a rectangular parallelepiped structure.

[0031] In this embodiment, preferably, the movable block 8 and the stop block 81 are an integrated structure, which helps to increase the strength of the movable block 8 and the stop block 81. The height of the ash squeezing column 6 is less than the height of the casing 1, which increases the convenience of use.

[0032] Example 2

[0033] See also Figure 1-Figure 4 , which is the second embodiment of the utility model, is based on the previous embodiment, and the difference is that:

[0034] The top of the support seat 2 is provided with symmetrically distributed vertical rods 31, which realizes the addition of the vertical rods 31, and the top of the vertical rods 31 is provided with horizontal rods 32, and the vertical rods 31 increase the support for the horizontal rods 32; the top of the horizontal rods 32 is installed with lifting ears 33, and the lifting ears 33 increase the convenience of lifting the support seat 2, and one end of the high-pressure pipe 4 is provided with a flange 41, and the high-pressure pipe 4 and the pump truck are more convenient to connect through the flange 41; the vertical rods 31 and the horizontal rods 32 are an integrated structure, so that the strength of the vertical rods 31 and the horizontal rods 32 is better, and the lifting ears 33 and the horizontal rods 32 are welded and connected, so that the lifting ears 33 and the horizontal rods 32 are firmly fixed.

[0035] The working principle and use process of the utility model are as follows: when in use, firstly, the well is cleared to keep the well unobstructed, and then the well is backwashed, clean water is injected into the well from the annular space between the casing 1 and the ash squeezing string 6, so that the oil stains on the well wall are returned from the ash squeezing string 6, and then a certain amount of bridging agent mortar and retarder are added to the mixed cement, and a positive circulation operation is carried out to inject a certain amount of pre-fluid into the ash squeezing string 6, and then the cement bridging agent and retarder prepared in the mortar mixing tank are injected into the formation, and then the ash squeezing string 6 is lifted to a certain position to displace the excess mortar, and the task of cementing and plugging the leaking formation is completed.

[0036] Although the embodiments of the present invention have been shown and described, as detailed above, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An oilfield well repair operation ash squeezing device, characterized in that: include A casing (1), wherein a support seat (2) is arranged at the top of the casing (1), a fixing cylinder (5) is arranged at the top of the support seat (2), and a ash squeezing pipe column (6) extending into the interior of the casing (1) is arranged at the bottom of the support seat (2); A high-pressure pipe (4), one end of which passes through the fixed cylinder (5) and extends to the interior of the ash squeezing pipe column (6); A limiting mechanism, the limiting mechanism comprising a limiting ring (7) and a movable block (8), the limiting ring (7) being mounted on the inner wall of the ash squeezing pipe column (6), and a groove (71) being provided on the inner side surface of the limiting ring (7), a spring (710) being provided at the bottom of the groove (71), one end of the movable block (8) being embedded in the groove (71) and connected to the spring (710), and the other end being extended out of the groove (71) and connected to a stop block (81) capable of abutting against the high-pressure pipe (4).

2. The ash squeezing device for oilfield well repairing operation according to claim 1 is characterized in that: A guide rod (810) is provided on the side surface of the stop block (81), a guide groove (72) is provided inside the limiting ring (7), and the guide rod (810) is inserted into the inside of the guide groove (72).

3. The ash squeezing device for oilfield well repairing operation according to claim 2, characterized in that: The guide rod (810) and the movable block (8) are of an integrated structure, and the guide rod (810) is of a rectangular parallelepiped structure.

4. The ash squeezing device for oilfield well repairing operation according to claim 1, characterized in that: The movable block (8) and the stop block (81) are an integrated structure, and the height of the ash squeezing pipe column (6) is smaller than the height of the casing (1).

5. The ash squeezing device for oilfield well repairing operation according to claim 1, characterized in that: The top of the support seat (2) is provided with symmetrically distributed vertical rods (31), and the top of the vertical rods (31) is provided with horizontal rods (32).

6. The ash squeezing device for oilfield well repairing operation according to claim 5, characterized in that: A lifting ear (33) is installed on the top of the horizontal rod (32), and a flange (41) is provided at one end of the high-pressure pipe (4).

7. The ash squeezing device for oilfield well repairing operation according to claim 6, characterized in that: The vertical rod (31) and the horizontal rod (32) are an integrated structure, and the lifting ear (33) and the horizontal rod (32) are welded together.

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