Interactively distributed two-way honeycomb ventilation water-blocking and sand-proof short section

Abstract

The present invention relates to an alternatingly distributed bidirectional honeycomb ventilation, water-blocking and sand-proof short section, comprising a sand core and an outer shell; the sand core is axially distributed with a plurality of honeycomb holes opening at both ends respectively, the sand core is capable of ventilation and water-blocking, the sand walls between the honeycomb holes can withstand a specific pressure difference and meet the permeability requirements; the outer shell is a barrel-shaped structure with one end open, and a plurality of air inlet holes are arranged on the bottom plate of the outer shell; the sand core is fixed in the outer shell. The short section of the present invention can be applied to a throttle to replace the current sand-proof net of the throttle, and can be put in and taken out together with the throttle to control the height of the liquid column in the well, effectively extend the production cycle of the gas well, increase and stabilize production, and also achieve the effect of sand prevention; it can also be applied to a natural gas pipeline network to remove moisture from the natural gas, prevent the pipeline network from freezing and clogging, and make the natural gas purer.

Description

Technical Field

[0001] The invention belongs to the technical field of gas well exploitation, and in particular relates to an alternately distributed bidirectional honeycomb ventilation water-blocking and sand-proofing short joint. Background Art

[0002] After a period of production, most oil and gas wells will produce water sooner or later, and the formation water will form a liquid column in the oil pipe. As the formation energy decays, the liquid carrying capacity of the wellbore for gas production becomes worse and worse, and the liquid column formed by the accumulated liquid will become higher and higher. When the liquid column rises to a certain height, the wellbore pressure will be balanced with the bottom hole pressure, and the well will stop production in this state. Therefore, controlling the height of the liquid column becomes one of the effective measures to extend the production cycle of gas wells.

[0003] At present, the main methods for controlling the downhole liquid level are: (1) drainage method, such as gas lift drainage, plunger drainage, foam drainage agent drainage, and water atomization drainage; gas lift drainage and plunger drainage have high construction costs; foam drainage agent drainage is easy to form residues in the well, and water atomization drainage requires sufficient formation energy; (2) water plugging method, which requires plugging the production layer, is costly, and if gas and water are discharged at the same time, it will affect the gas production.

[0004] In view of the above problems, it is necessary to study an interactively distributed bidirectional honeycomb ventilation water-blocking and sand-proof short section that can control the height of the liquid column in the well and effectively increase and stabilize production. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an interactively distributed bidirectional honeycomb ventilation water-blocking and sand-proof short section that can control the height of the liquid column formed in the well and effectively increase and stabilize production.

[0006] The present invention solves the technical problem by adopting the following technical solutions:

[0007] Interactively distributed bidirectional honeycomb ventilation water-blocking and sand-proof short section, including sand core and shell;

[0008] The sand core is axially distributed with a plurality of honeycomb holes opening at both ends respectively. The sand core is ventilated and water-resistant. The sand walls between the honeycomb holes can withstand a specific pressure difference and meet the permeability requirements.

[0009] The shell is a barrel-shaped structure with one end open, and a plurality of air inlet holes are provided on the bottom plate of the shell;

[0010] The sand core is fixed in the shell.

[0011] Furthermore, the honeycomb holes include upper honeycomb holes and lower honeycomb holes with opposite opening directions, and the upper honeycomb holes and the lower honeycomb holes are alternately distributed.

[0012] Furthermore, the air inlet holes correspond to the positions of the lower honeycomb holes on the sand core one by one.

[0013] Furthermore, a plurality of air guide holes are distributed on the side wall of the shell.

[0014] Furthermore, the open end of the shell is provided with a connecting thread.

[0015] The advantages and positive effects of the present invention are:

[0016] (1) The short joint of the present invention can be applied to the choke to replace the sand control net of the current choke. It can be put in and taken out together with the choke to control the height of the liquid column in the well, effectively extend the production cycle of the gas well, increase and stabilize production, and also achieve the effect of sand control;

[0017] (2) The short joint of the present invention can be applied to natural gas pipeline networks to remove moisture from natural gas, prevent freezing of the pipeline network, and make the natural gas purer. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments, but it should be understood that these drawings are designed only for explanation purposes and are not intended to limit the scope of the present invention. In addition, unless otherwise specified, these drawings are intended only to conceptually illustrate the structural configurations described herein and are not necessarily drawn to scale.

[0019] Figure 1 A structural cross-sectional view of a sand core of an alternately distributed bidirectional honeycomb ventilation water-blocking and sand-proof short section provided in an embodiment of the present invention;

[0020] Figure 2 A top view of the structure of a sand core of an alternately distributed bidirectional honeycomb ventilation water-blocking and sand-proof short section provided in an embodiment of the present invention;

[0021] Figure 3 A bottom view of the structure of a sand core of an alternately distributed bidirectional honeycomb ventilation water-blocking and sand-proof short section provided in an embodiment of the present invention;

[0022] Figure 4 A structural cross-sectional view of the outer shell of the interactively distributed bidirectional honeycomb ventilation water-blocking and sand-proofing short section provided in an embodiment of the present invention;

[0023] Figure 5 This is a structural cross-sectional view of the interactively distributed bidirectional honeycomb ventilation water-blocking and sand-control short section provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0024] First, it should be noted that the specific structure, features and advantages of the present invention will be specifically described below by way of example, but all descriptions are only for illustration and should not be understood as limiting the present invention in any way. In addition, any single technical feature described or implied in the embodiments mentioned herein can still be combined or deleted between these technical features (or their equivalents) to obtain more other embodiments of the present invention that may not be directly mentioned herein.

[0025] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0026] like Figure 1-5 As shown, the present invention provides an alternately distributed bidirectional honeycomb ventilation water-blocking and sand-proof short section, comprising a sand core 1 and a shell 2;

[0027] The sand core is axially distributed with a plurality of honeycomb holes opening at both ends respectively, the sand core is ventilated and water-blocking, the sand walls between the honeycomb holes can withstand a specific pressure difference to meet the permeability requirement; the honeycomb holes include an upper honeycomb hole 3 and a lower honeycomb hole 4 with opposite opening directions, the upper honeycomb holes and the lower honeycomb holes are alternately distributed to form an alternatingly distributed bidirectional honeycomb structure; in this embodiment, a plurality of honeycomb holes with opposite opening directions are distributed in the cylindrical sand core body, the honeycomb holes opening upward and the honeycomb holes opening downward are alternately distributed to form a unique filtering channel to increase the filtering area, wherein the sand used for the sand core is an existing special functional sand, the consolidation method of the sand is a proprietary consolidation method, and has the function of ventilation and water blocking; the sand walls between the holes can withstand a sufficient pressure difference to meet the permeability requirement.

[0028] The shell is a barrel-shaped structure with one end open. In the present embodiment, the bottom of the shell is a plane with chamfers, and a plurality of air inlet holes 6 are provided on the bottom plate of the shell; the air inlet holes correspond one to one with the positions of the lower honeycomb holes 4 on the sand core, and a plurality of air guide holes 5 are distributed on the side wall of the shell, which penetrate the side wall of the sand core and are used for air conduction and ventilation; an internal thread 7 is provided at the open end of the shell, which can be connected to the male thread at the bottom of the throttle; it should be noted that the thread provided at the open end of the shell is intended to facilitate connection with other tools.

[0029] When processing the short section, the outer shell is processed first, and then the sand core is poured. The sand core is poured in the outer shell. During the pouring process, a special mold is preset to form alternately distributed bidirectional honeycomb holes. After the pouring is completed, the mold can be withdrawn.

[0030] When this short joint is used in the choke, it replaces the sand control net of the current choke and is put in and taken out together with the choke to control the height of the liquid column in the well, effectively extending the production cycle of the gas well, increasing and stabilizing production, and also achieving the effect of sand control.

[0031] When this short joint is used in the natural gas pipeline network, it can remove moisture from the natural gas, prevent the pipeline network from freezing and blockage, and make the natural gas purer.

[0032] The above embodiments describe the present invention in detail, but the contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the present invention.

Claims

1. Interactively distributed bidirectional honeycomb ventilation water-blocking and sand-proof short section, characterized by: Including sand core and shell; The sand core is axially distributed with a plurality of honeycomb holes opening at both ends respectively. The sand core is ventilated and water-resistant. The sand walls between the honeycomb holes can withstand a specific pressure difference and meet the permeability requirements. The shell is a barrel-shaped structure with one end open, and a plurality of air inlet holes are provided on the bottom plate of the shell; The sand core is fixedly located in the shell; The honeycomb holes include upper honeycomb holes and lower honeycomb holes with opposite opening directions, and the upper honeycomb holes and the lower honeycomb holes are alternately distributed; The air inlet holes correspond to the positions of the lower honeycomb holes on the sand core one by one.

2. The interactively distributed bidirectional honeycomb ventilation water-blocking and sand-control short section according to claim 1 is characterized by: A plurality of air guide holes are distributed on the side wall of the shell.

3. The interactively distributed bidirectional honeycomb ventilation water-blocking and sand-control short section according to claim 1 is characterized by: The open end of the shell is provided with a connecting thread.

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