CN220415331U - Corrosion-resistant anti-scaling sand remover - Google Patents

Abstract

The utility model provides a corrosion-resistant anti-scaling sand remover, which comprises: the sand control pipe is sleeved on the central pipe and partially surrounds the upper joint and the lower joint, a sealed annular cavity is formed between the sand control pipe and the central pipe, a slit for communicating the outside of the sand control pipe wall with the annular cavity is formed in the sand control pipe, the separating blade is arranged on the outer wall of the central pipe, one end, close to the lower joint, of the central pipe is a liquid inlet flower pipe section, and a through hole for communicating the annular cavity with the inside of the central pipe is formed in the liquid inlet flower pipe section; the utility model has the advantages that: the stainless steel material is adopted, so that the problem of corrosion and scaling of the sand remover is solved, and the service life of the sand remover is effectively prolonged; by adopting the three-stage sand removal process technology, stratum sand and slurry can be effectively prevented from entering the oil pump, the abrasion of the oil pump and pump clamping are reduced, and the pump detection period is prolonged.

Description

Corrosion-resistant anti-scaling sand remover

Technical Field

The utility model relates to the technical field of sand removers for oil fields, in particular to a corrosion-resistant anti-scaling sand remover.

Background

The existing underground sand removing tool for the oil well has single sand removing technology and poor sand removing effect; the tool has poor corrosion resistance and scaling resistance, so that the service life of the tool is reduced. The main reason is that the downhole tool is corroded due to corrosive substances such as acid, alkali and the like in the downhole liquid of the oil well, so that the strength of the tool is reduced, and the service life of the tool is influenced; along with the precipitation of calcium and magnesium ions in the underground liquid, scaling of the underground tool is caused, so that the tool is blocked; the sand and mud are produced from the stratum, so that the abrasion and the pump clamping of the oil pump are caused, the normal production of the oil well is influenced, and the well repairing operation is caused.

Disclosure of Invention

In view of the above problems, an object of the present utility model is to provide a corrosion-resistant and anti-scaling sand remover for effectively preventing corrosion and scaling of the sand remover, and remarkably improving the service life of the sand remover, so as to overcome the defects of the prior art.

The utility model provides a corrosion-resistant anti-scaling sand remover, which comprises: the anti-sand device comprises an upper joint, an anti-sand pipe, separating blades, a central pipe, a T-shaped liquid inlet pipe and a lower joint, wherein the central pipe is connected with an oil pump and a tail pipe through the upper joint and the lower joint at two ends, the anti-sand pipe is sleeved on the central pipe and partially surrounds the upper joint and the lower joint, a sealed annular cavity is formed between the anti-sand pipe and the central pipe, a slit which is communicated with the outside of the anti-sand pipe wall and the annular cavity is formed in the anti-sand pipe, the separating blades are arranged on the outer wall of the central pipe and are positioned in the annular cavity so as to be used for carrying out gravity separation on mixed liquid entering an annular space, one end of the central pipe, which is close to the lower joint, is a liquid inlet pipe section, a through hole which is communicated with the annular cavity and the inside of the central pipe is formed in the liquid inlet pipe section, pipe orifices at two ends of the T-shaped liquid inlet pipe are communicated with the annular cavity, and a middle opening of the T-shaped liquid inlet pipe is communicated with the liquid inlet pipe section.

As the preferential of the utility model, the slots are uniformly distributed on the sand control pipe along the axial direction.

Preferably, the shape of the separating blade is a continuous spiral shape, and the separating blade is spirally wound on the outer wall of the central tube along the axial direction of the central tube.

As the preferable materials of the sand prevention pipe, the separation blade, the central pipe and the T-shaped liquid inlet pipe, the sand prevention pipe, the separation blade, the central pipe and the T-shaped liquid inlet pipe are made of stainless steel.

The utility model has the advantages and positive effects that: the components of the sand remover are all made of stainless steel materials, so that the corrosion and scaling of the sand remover can be effectively prevented, and the service life of the sand remover is obviously prolonged. And the sand remover adopts a three-stage sand removal process technology, so that stratum sand and mud are effectively prevented from entering the oil pump, pump abrasion is reduced, pump clamping is carried out, and pump detection period is prolonged.

Drawings

Fig. 1 is a schematic view of the overall structure of the present utility model.

Reference numerals: the sand control pipe comprises an upper joint 1, a sand control pipe 2, separating blades 3, a central pipe 4, a T-shaped liquid inlet pipe 5, a liquid inlet pipe section 6, a lower joint 7, an annular cavity 8 and an axial slit 9.

Detailed Description

In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that such embodiment(s) may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.

Referring to fig. 1, the embodiment provides a corrosion-resistant anti-scaling sand remover, which comprises an upper joint 1, a sand prevention pipe 2, a separation blade 3, a central pipe 4, a T-shaped liquid inlet pipe 5, a liquid inlet pipe section 6, a lower joint 7 and an annular cavity 8, wherein the upper part of the upper joint 1 is connected with an oil pump, the bottom of the lower joint 7 is connected with a tail pipe, the upper part of the lower joint 7 is connected with the liquid inlet pipe section 6 of the central pipe 4, and the lower part of the upper joint 1 is connected with the other end of the central pipe 4. Sand control pipe 2 is sleeved on center pipe 4 and surrounds the lower portion of upper joint 1 and the upper portion of lower joint 7. The annular cavity 8 is formed by sealing and surrounding the inner wall of the sand control pipe 2, the outer wall of the central pipe 4, the side wall of the upper joint 1 and the side wall of the lower joint 7. The wall of the sand control pipe 2 is provided with an axial slot 9, oil well mixed liquid enters an annular cavity 8 between the sand control pipe 2 and the central pipe 4 through the axial slot 9, sand in the mixed liquid is blocked outside the sand control pipe by the axial slot 9, and the first-stage sand removal is achieved; the central tube 4 is provided with a spiral separating blade 3, and the separating blade 3 carries out gravity separation on the mixed liquid entering the annular cavity 8, so that gas, liquid and slurry in the mixed liquid are separated, and the secondary sand removal is achieved; the mixed liquid after gravity separation enters the central tube through the T-shaped liquid inlet tube 5 and the liquid inlet flower tube section 6 at the same time, the T-shaped liquid inlet tube 5 and the liquid inlet flower tube section 6 enable the mixed liquid to change direction and reduce speed, namely the mixed liquid passing through the T-shaped liquid inlet tube 5 impacts the mixed liquid entering from the liquid inlet flower tube section 6, so that fine sand and slurry sink, and three-level sand removal is achieved; the liquid after sand removal flows upwards and enters the oil pump through the central pipe 4, and fine sand and mud sink into the tail pipe due to the large specific gravity. Because sand prevention pipe 2, separation blade 3, center tube 4, T shape feed liquor pipe 5 all adopt stainless steel material, can effectively prevent the desander and corrode, scale deposit, ensure the desander normal use, extension desander life.

The mixed liquid after gravity separation in the implementation simultaneously enters the T-shaped liquid inlet pipe 5 and the liquid inlet pipe section 6, and the purpose of the mixed liquid entering the T-shaped liquid inlet pipe 5 is that the liquid firstly flows downwards when entering the central pipe 4; when the liquid entering the liquid inlet pipe section 6 enters the central pipe 4, the liquid flows upwards under the action of the suction force of the oil pump, and the two liquid in different flow directions have one direction change to reduce the speed, so that the slurry and the liquid are separated by gravity. The liquid flows upwards under the action of the oil pump and enters the oil pump, and the mud sinks into the bottom tail pipe.

Working principle: during oil pumping of an oil well, the mixed liquid of bottom oil, gas and water enters an annular cavity 8 between the sand control pipe 2 and the central pipe 4 through an axial slot 9 of the sand control pipe 2, and sand in the mixed liquid is blocked and isolated outside the sand control pipe 2 by the axial slot 9, so that the first-stage sand removal is achieved; the mixed liquid flows downwards in the axial slots 9, and under the action of the separating blades 3, gravity separation is generated on the liquid, gas and sand, and fine sand and slurry sink to achieve secondary sand removal; the mixed liquid after gravity separation enters the central pipe 4 through the T-shaped liquid inlet pipe 5 and the liquid inlet pipe section 6, the T-shaped liquid inlet pipe 5 changes direction and reduces speed, fine sand and mud sink into the tail pipe due to larger specific gravity, and three-level sand removal is achieved; the fluid flow enters the pump through the central tube 4. By adopting the three-stage sand removal process technology, stratum sand and slurry can be effectively prevented from entering the oil pump, the abrasion of the oil pump and pump clamping are reduced, and the pump detection period is prolonged.

The foregoing is merely illustrative embodiments of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the technical scope of the present utility model, and the utility model should be covered. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims (1)

1. A corrosion-resistant, anti-fouling desander comprising: the anti-sand device comprises an upper joint, an anti-sand pipe, separating blades, a central pipe, a T-shaped liquid inlet pipe and a lower joint, wherein the central pipe is connected with an oil pump and a tail pipe through the upper joint and the lower joint at two ends, the anti-sand pipe is sleeved on the central pipe and partially surrounds the upper joint and the lower joint, a sealed annular cavity is formed between the anti-sand pipe and the central pipe, a slit for communicating the outer part of the anti-sand pipe wall with the annular cavity is formed in the anti-sand pipe, the separating blades are arranged on the outer wall of the central pipe and are positioned in the annular cavity so as to be used for carrying out gravity separation on mixed liquid entering an annular space, one end of the central pipe, which is close to the lower joint, is a liquid inlet pipe section, a through hole for communicating the annular cavity with the inner part of the central pipe is formed in the liquid inlet pipe section, the T-shaped liquid inlet pipe is arranged at the position, two end pipe orifices of the T-shaped liquid inlet pipe are communicated with the annular cavity, and the middle opening of the T-shaped liquid inlet pipe is communicated with the liquid inlet pipe section;

the slots are uniformly distributed on the sand control pipe along the axial direction;

the separating blades are in a continuous spiral shape, and are spirally wound on the outer wall of the central tube along the axial direction of the central tube;

the sand prevention pipe, the separation blade, the central pipe and the T-shaped liquid inlet pipe are made of stainless steel.