Perforation well completion device

Abstract

The utility model belongs to the technical field of perforation well completion, and particularly relates to a perforation well completion device. The device comprises an oil pipe, a lifting mechanism, a gas and sand prevention mechanism and a perforation mechanism. The lifting mechanism is connected to the oil pipe and is configured to be capable of pumping fluid in the oil pipe out of the well. The gas and sand prevention mechanism is also connected to the oil pipe and is constructed to enable fluid in the casing pipe to flow into the oil pipe through the gas and sand prevention mechanism. The perforating mechanism is connected to the lower portion of the oil pipe and is configured to be capable of conducting perforating operation in response to the excitation pressure. The gas and sand prevention mechanism is constructed to enable fluid in the casing pipe to flow into the oil pipe so as to generate excitation pressure acting on the perforation mechanism, and gas and sand removal treatment can be conducted on formation fluid flowing through the gas and sand prevention mechanism and entering the oil pipe. According to the device, degassing and / or desanding in the well completion process can be achieved, the fault occurrence rate of the device is reduced, and the maintenance and operation cost of an oil field is saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of perforation completion, and in particular relates to a perforation completion device. Background Art

[0002] Perforating is a common completion method. A perforating gun creates channels between the casing, cement sheath, and formation in a specific oil reservoir section, allowing formation fluids to flow into the wellbore. To facilitate and simplify the process, a perforating string (perforating string + rod pump housing) is typically deployed. During pump-out operations, the rod string is lowered to carry the rod pump barrel.

[0003] However, the above technical solution has several defects as described below: First, for wells where sand and gas are produced in the formation, this type of tubing combination cannot prevent gas and sand, and sand jamming and gas lock are very likely to occur during the production process, which greatly shortens the pump inspection cycle and increases production and operating costs; second, the rod pump is limited by the maximum outer diameter and cannot meet the actual production liquid volume demand.

[0004] Therefore, the existing perforation completion tubing cannot meet the needs of exploration and development, and there is an urgent need to develop new perforation completion equipment to meet the requirements of efficient oil field development, cost reduction and efficiency improvement. Utility Model Content

[0005] In order to solve the technical problems in the prior art that the perforating string is prone to sand sticking, air lock and other failures and cannot meet the actual production fluid volume demand, the utility model provides a perforating completion device.

[0006] The perforation completion device comprises:

[0007] oil pipelines;

[0008] a lifting mechanism connected to the oil pipe and configured to pump the fluid in the oil pipe out of the well;

[0009] an air sand prevention mechanism connected to the oil pipe and configured to allow the fluid in the casing to flow into the oil pipe through the air sand prevention mechanism; and

[0010] a perforating mechanism connected below the oil pipe and configured to perform a perforating operation in response to an excitation pressure, so as to form a channel in the casing, cement sheath and formation that allows formation fluid to flow into the casing;

[0011] The anti-gas and sand mechanism is configured to allow the fluid inside the casing to flow into the oil pipe to generate the excitation pressure acting on the perforating mechanism, and to degas and / or desand the formation fluid flowing through the anti-gas and sand mechanism and into the oil pipe.

[0012] As an extension of the above technical solution, the present invention also provides the following embodiments:

[0013] The lifting mechanism is arranged above the air sand prevention mechanism.

[0014] The air sand prevention mechanism includes a spiral air sand anchor.

[0015] The air sand prevention mechanism includes a high-efficiency air anchor.

[0016] The air sand prevention mechanism includes a corundum sand filter tube.

[0017] The lifting mechanism includes a tube pump.

[0018] The specific model of the tube pump is selected according to the actual production liquid volume.

[0019] The perforating mechanism includes a perforating gun, a gun tail and a detonator.

[0020] The detonator is a time-delay detonator.

[0021] The perforating mechanism includes a safety gun.

[0022] The advantages of the present invention compared to the prior art are:

[0023] By setting up an anti-gas and sand mechanism on the oil pipe, the defects of existing perforating completion equipment that cannot prevent sand and gas are solved, thereby reducing the probability of equipment failure, extending the maintenance cycle, and reducing production and operating costs.

[0024] By replacing conventional rod pumps with tubing pumps, the defect of existing perforating completion strings that rod pumps cannot meet the actual production fluid volume requirements due to the maximum outer diameter limitation of rod pumps is eliminated. By selecting different models of tubing pumps, the actual production fluid volume requirements can be met, thereby expanding the scope of application of perforating completion equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the perforation completion device according to the utility model.

[0026] The drawings in this utility model are schematic diagrams for illustrating structures and principles, and are not necessarily drawn according to actual sizes and proportions.

[0027] The specific meanings of the reference numerals in the figures are as follows:

[0028] 1. Oil pipe; 2. Lifting mechanism; 3. Air and sand prevention mechanism; 4. Perforating mechanism; 41. Perforating gun; 42. Gun tail; 5. Borehole; 6. Casing; 7. Cement ring; 100. Perforating completion device. DETAILED DESCRIPTION

[0029] The embodiments of the present invention will be described in more detail below with reference to the accompanying drawings.

[0030] Figure 1 Schematic diagram of the structure of a perforating completion device 100 according to the present invention. As shown in the figure, the perforating completion device 100 includes an oil pipe 1, a lifting mechanism 2, an air and sand prevention mechanism 3, and a perforating mechanism 4. The lifting mechanism 2 is connected to the oil pipe 1 and is configured to pump the fluid in the oil pipe 1 out of the well. The air and sand prevention mechanism 3 is also connected to the oil pipe 1 and is configured to allow the fluid in the casing 6 to flow into the oil pipe 1 through the air and sand prevention mechanism 3. The perforating mechanism 4 is connected below the oil pipe 1 and is configured to perform a perforating operation in response to an excitation pressure, so as to form a channel 5 in the casing 6, the cement sheath 7, and the formation (located outside the cement sheath 7, not shown) that allows the formation fluid to flow into the casing 6. The anti-gas and sand mechanism 3 is also configured to allow the fluid inside the casing 6 to flow into the oil pipe 1 to generate an excitation pressure acting on the perforating mechanism 4 to excite the perforating mechanism 4 to perform a perforating operation, and is capable of degassing and / or desanding the formation fluid that flows through the anti-gas and sand mechanism 3 and enters the oil pipe 1.

[0031] During the actual operation, the operator lowers the assembled perforating completion device 100 into the casing 6. At the wellhead, the operator uses pressure buildup, pressure waves, and other methods to force the fluid inside the casing 6 into the air and sand prevention mechanism 3, thereby transmitting pressure to the perforating mechanism 4. When the pressure on the perforating mechanism 4 reaches its activation pressure, it is activated and performs a perforating operation, forming a number of channels 5 within the casing 6, cement sheath 7, and formation, connecting the formation with the casing 6. Crude oil, gas, and other fluids in the formation flow through the channels 5 into the casing 6 and, under the influence of formation pressure, into the air and sand prevention mechanism 3 and the oil pipe 1. As the formation fluid flows through the air and sand prevention mechanism 3, it degasses and / or removes sand from the formation. The formation fluid that has entered the oil pipe 1 (most of which is now liquid after degassing and / or desanding) is then pumped out of the well by the activated lifting mechanism 2 to participate in subsequent processing.

[0032] By providing an anti-gas sand mechanism 3 on the oil pipe 1, the defect of the existing perforation completion string that is unable to prevent sand and gas is solved, thereby reducing the probability of equipment failure, extending the maintenance cycle, reducing production and operating costs, and meeting the requirements of efficient oil field development, cost reduction and efficiency improvement.

[0033] like Figure 1 As shown, in some embodiments of the present invention, in order to reduce the energy consumption of the lifting mechanism 2 , the lifting mechanism 2 is arranged above the air sand prevention mechanism 3 .

[0034] In some embodiments of the present invention, the anti-air sand mechanism 3 includes a spiral air sand anchor. It should be noted that the spiral air sand anchor is an existing technology known to those skilled in the art, and its structure and working principle will not be described in detail here.

[0035] In some embodiments of the present invention, the air sand prevention mechanism 3 includes a high-efficiency air anchor. It should be noted that the high-efficiency air anchor is an existing technology known to those skilled in the art, and its structure and working principle will not be described in detail here.

[0036] In some embodiments of the present invention, the air sand prevention mechanism 3 includes a corundum sand filter tube. It should be noted that the corundum sand filter tube is an existing technology known to those skilled in the art, and its structure and working principle will not be described in detail here.

[0037] In some embodiments of the present invention, the lifting mechanism 2 includes a tubing pump. Compared to rod pumps used in conventional completion and perforating strings, tubing pumps do not have the drawback of a limited maximum outer diameter. Thus, a wider range of specifications are available, capable of meeting various actual production fluid volume requirements and expanding the applicable scope of the perforating and completion device 100.

[0038] Preferably, the tubular pump is constructed such that a specific model is selected according to the actual production fluid volume.

[0039] In some embodiments of the present invention, the perforating mechanism 4 includes a perforating gun 41, a gun butt 42 connected to the end of the perforating gun 41, and an initiator (not shown). The initiator is disposed within the perforating gun 41 and is capable of exploding in response to excitation pressure, thereby completing the perforating function of the perforating mechanism 4. It should be noted that the perforating gun 41, gun butt 42, and initiator are prior art known to those skilled in the art, and their structures and operating principles are not described in detail here.

[0040] Preferably, the initiator is a time-delay initiator. It should be noted that the time-delay initiator is a prior art known to those skilled in the art, and its structure and working principle will not be described in detail here.

[0041] In some embodiments of the present invention, in order to improve the safety of the operation, the perforating mechanism 4 includes a safety gun (not shown). It should be noted that the safety gun is a prior art known to those skilled in the art, and its structure and working principle will not be described in detail here.

[0042] The perforating completion device 100 of the present invention, by providing an air and sand prevention mechanism 3 on the oil tubing 1, overcomes the drawback of existing perforating completion strings, which lack sand and air prevention capabilities. This reduces the probability of equipment failure, extends maintenance cycles, and lowers production and operating costs. By replacing conventional rod pumps with tubing pumps, the drawback of existing perforating completion strings, where rod pumps are limited by their maximum outer diameter and cannot meet actual production fluid volume requirements, is eliminated. Actual production fluid volume requirements can be met by selecting different tubing pump models, thereby expanding the applicability of the perforating completion device.

[0043] In this utility model, "fluid" includes "liquid" and "gas".

[0044] It is understood that the present invention is described through certain embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. Furthermore, under the guidance of the present invention, these features and embodiments may be modified and combined to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. A perforation completion device, characterized in that: include: Oil pipe (1); A lifting mechanism (2) connected to the oil pipe (1) and configured to pump the fluid in the oil pipe (1) out of the well; An air sand prevention mechanism (3) is connected to the oil pipe (1) and is configured to allow the fluid in the casing (6) to flow into the oil pipe (1) through the air sand prevention mechanism (3); as well as A perforating mechanism (4) is connected below the oil pipe (1) and is configured to perform a perforating operation in response to an excitation pressure to form a channel (5) in the casing (6), cement sheath (7) and formation, which enables formation fluid to flow into the casing (6). The anti-gas and sand mechanism (3) is configured to allow the fluid inside the casing (6) to flow into the oil pipe (1) to generate the excitation pressure acting on the perforating mechanism (4), and to perform degassing and / or desanding on the formation fluid flowing through the anti-gas and sand mechanism (3) and into the oil pipe (1).

2. The perforation completion device according to claim 1, characterized in that: The lifting mechanism (2) is arranged above the air sand prevention mechanism (3).

3. The perforation completion device according to claim 2, characterized in that: The anti-gas sand mechanism (3) comprises a spiral gas sand anchor.

4. The perforation completion device according to claim 2, characterized in that: The air sand prevention mechanism (3) comprises a high-efficiency air anchor.

5. The perforation completion device according to claim 2, characterized in that: The air sand prevention mechanism (3) comprises a corundum sand filter tube.

6. The perforation completion device according to any one of claims 1 to 5, characterized in that: The lifting mechanism (2) comprises a tube pump.

7. The perforation completion device according to claim 6, characterized in that: The specific model of the tube pump is selected according to the actual production liquid volume.

8. The perforation completion device according to claim 7, characterized in that: The perforating mechanism (4) comprises a perforating gun (41), a gun tail (42) and a detonator.

9. The perforation completion device according to claim 8, characterized in that: The detonator is a time-delay detonator.

10. The perforation completion device according to claim 9, characterized in that: The perforating mechanism (4) comprises a safety gun.

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