CN211737116U

CN211737116U - Natural gas well mouth cyclone sand remover

Info

Publication number: CN211737116U
Application number: CN202020340149.5U
Authority: CN
Inventors: 王显峰; 杨太国; 岳涛; 孙忠成
Original assignee: Daqing High Tech Zone Longdi Petrochemical Technology Co ltd
Current assignee: Daqing High Tech Zone Longdi Petrochemical Technology Co ltd
Priority date: 2020-03-18
Filing date: 2020-03-18
Publication date: 2020-10-23
Anticipated expiration: 2030-03-18

Abstract

The utility model discloses a natural gas well head whirl sand remover comprises quick-open blind plate, separation chamber, sand setting chamber, block valve, and the separation chamber is located sand setting chamber top and passes through the pipe connection with sand setting chamber, and the separation chamber top is fixed with quick-open blind plate, be equipped with block valve on the pipeline of being connected between separation chamber and the sand setting chamber, the separation chamber upper end is equipped with the gas outlet, the middle part is equipped with the air inlet, the lower extreme is equipped with pressure release mouth one, separation chamber inside upper end is fixed with the silk screen demister, and silk screen demister below is fixed with the cyclone cylinder that the whirl component has been connected to the bottom, sand setting chamber upper end is equipped with pressure release mouth two, the lower extreme is equipped with the washing mouth, and its bottom central point puts and is equipped with the sand discharge mouth. The utility model discloses a natural gas well head whirl sand remover separates to thin, silt specially, and design simple structure, small maintenance convenience have reduced the probability that the whirl element freezes stifled and has add quick-open maintenance interface simultaneously, make the change of whirl element and overhaul of equipments more high-efficient, convenient.

Description

Natural gas well mouth cyclone sand remover

Technical Field

The utility model belongs to separator especially relates to a natural gas well head whirl desander.

Background

Along with the fact that some oil and gas fields in China enter the middle and later periods of the production life, oil and gas resources produced by the conventional method are reduced, and therefore production increasing measures such as fracturing and the like have to be adopted, and the liquid content and the sand content of produced gas are increased. In a gas field, because the strength of stratum rocks is reduced, the pore pressure of the stratum is reduced, the production pressure difference is large, and the water content is high, the produced natural gas contains a large amount of sand grains, and the existence of the sand grains causes serious harm to a transportation pipeline and equipment at the rear end of a wellhead, such as accelerated pipeline corrosion, pipeline blockage, damage to metering instruments, instruments and valves and the like. The horizontal spiral element of the existing sand removing device is arranged between a natural gas inlet and a natural gas outlet, the whole sand remover needs to be removed during replacement, the maintenance and the replacement are very difficult, the horizontal rotation sand removing effect is not ideal, the sand at the bottom of a sand settling cavity can not be cleaned in time, the sand removing is incomplete, the follow-up process is greatly influenced, and meanwhile, the potential safety hazard also exists.

Disclosure of Invention

The utility model aims to overcome the not enough of prior art, provide a natural gas well head whirl desander.

The utility model discloses a natural gas well head whirl sand remover comprises quick-open blind plate, separation chamber, sand setting chamber, block valve, and the separation chamber is located sand setting chamber top and passes through the pipe connection with sand setting chamber, and the separation chamber top is fixed with quick-open blind plate, be equipped with block valve on the pipeline of being connected between separation chamber and the sand setting chamber, the separation chamber upper end is equipped with the gas outlet, the middle part is equipped with the air inlet, the lower extreme is equipped with pressure release mouth one, separation chamber inside upper end is fixed with the silk screen demister, and silk screen demister below is fixed with the cyclone cylinder that the whirl component has been connected to the bottom, sand setting chamber upper end is equipped with pressure release mouth two, the lower extreme is equipped with the washing mouth, and its bottom central point puts and is equipped with the sand discharge mouth.

As a further improvement of the utility model, the center position of the top end of the quick-opening blind plate is provided with a handle.

As a further improvement of the utility model, two ear seats which are centrosymmetric are fixed on the outer surface of the separation cavity.

The natural gas wellhead cyclone desander of the utility model separates fine sand and silt sand, has small volume and convenient maintenance, changes horizontal rotation into vertical rotation, increases the effect of gravity sedimentation under the condition of unchanged centrifugal force, improves the separation efficiency of fine sand and silt sand, and reduces the probability of freezing and blocking of cyclone elements; meanwhile, a quick-opening maintenance interface is additionally arranged, so that the replacement of the rotational flow element and the equipment maintenance are more efficient and convenient; the maintenance time is shortened, the maintenance intensity is reduced, the inner walls of the cyclone element and the desanding cavity are coated with wear-resistant ceramic layers, and the service life of the desander is prolonged. The sand setting cavity is provided with a flushing port, and the sand setting cavity can be flushed by clear water, so that sand cleaning is more thorough.

Drawings

Fig. 1 the utility model discloses a natural gas well mouth whirl desander's schematic structure diagram.

Detailed Description

The utility model relates to a natural gas well mouth cyclone sand remover, which comprises a quick-opening blind plate 2, a separation cavity 3, a desilting cavity 9 and a cut-off valve 7, wherein the separation cavity 3 is positioned above the desilting cavity 9 and is connected with the desilting cavity 9 through a pipeline, a cut-off valve 7 is arranged on a pipeline connected between the separation chamber 3 and the sand settling chamber 9, an air outlet 10 is arranged at the upper end of the separation chamber 3, an air inlet 4 is arranged in the middle, a first pressure relief opening 6 is arranged at the lower end, a wire mesh demister 11 is fixed at the upper end in the separation chamber 3, a cyclone cylinder 12 of which the bottom is connected with a cyclone element 13 is fixed below the wire mesh demister 11, during the sand removing operation, the natural gas sand-carrying fluid is injected into the cyclone element 13 tangentially, the flow direction of the sand-carrying fluid is changed from a straight line form to a spiral form forcibly, so that the fluid generates a rotating flow field, under the combined action of centrifugal force and gravity, the sand grains with higher relative density are separated out and enter the sand settling chamber 9. The natural gas separated by the cyclone element 13 is separated again by the wire mesh demister 11, fine sand, silt and residual oil are separated out, and the separated natural gas is discharged out of the separation cavity 3 from the gas outlet 10 at the upper end of the separation cavity 3.

The upper end of the sand settling cavity 9 is provided with a second pressure relief opening 8, the lower end of the sand settling cavity is provided with a cleaning opening 14, and the center of the bottom of the sand settling cavity is provided with a sand discharge opening 15. Separated fine sand, free water and oil enter the sand setting cavity 9 through the shut-off valve 7, the shut-off valve 7 is closed during sand cleaning, the pressure of the sand setting cavity 9 is relieved by opening the second pressure relief opening 8, finally, clear water is filled through the cleaning opening 14 to forcibly flush the sand setting cavity 9, the sand cleaning opening, the cleaning opening 14 and the second pressure relief opening 8 are closed, and the shut-off valve 7 is opened slowly to finish primary sand cleaning; the sand is cleaned once every three to four days, and the gas well with large sand content can be cleaned once a day.

A quick-opening blind plate 2 is fixed at the top end of the separation cavity 3, a handle 1 is arranged at the center of the top end of the quick-opening blind plate 2, and if a cyclone element 13 needs to be replaced, an air inlet 4 and an air outlet 10 of the desander are closed after sand removal, and natural gas is cut off; and opening a first pressure relief opening 6 on the separation cavity 3, opening the quick-opening blind plate 2, and replacing the cyclone element 13. And the desander is restored to the working state after the cyclone element is replaced.

Two ear seats 5 which are centrosymmetric are fixed on the outer surface of the separation cavity 3, so that the equipment can run more safely and stably. The long-time use of whirl desander also can cause the erosion wearing and tearing to self, consequently the utility model discloses all coat wear-resisting ceramic layer to

whirl component

13 and 3 inner walls in desanding chamber in the natural gas well head whirl desander, prolonged the life of desander.

Claims

1. A natural gas wellhead cyclone sand remover comprises a quick-opening blind plate (2), a separation cavity (3), a sand settling cavity (9) and a cut-off valve (7), and is characterized in that the separation cavity (3) is positioned above the sand settling cavity (9) and is connected with the sand settling cavity (9) through a pipeline, the quick-opening blind plate (2) is fixed at the top end of the separation cavity (3), the cut-off valve (7) is arranged on the pipeline connected between the separation cavity (3) and the sand settling cavity (9), an air outlet (10) is arranged at the upper end of the separation cavity (3), an air inlet (4) is arranged in the middle of the separation cavity, a pressure relief opening I (6) is arranged at the lower end of the separation cavity (3), a wire mesh demister (11) is fixed at the upper end inside the separation cavity (3), a cyclone cylinder (12) connected with a cyclone element (13) at the bottom is fixed below the wire mesh demister (11), a pressure relief opening II (8) is arranged at the upper end of the, the center of the bottom of the sand discharging device is provided with a sand discharging port (15).

2. The natural gas wellhead rotational flow desander as claimed in claim 1, characterized in that the handle (1) is arranged at the center of the top end of the quick-opening blind plate (2).

3. The natural gas wellhead rotational flow desander as claimed in claim 1, characterized in that two ear seats (5) which are centrosymmetric are fixed on the outer surface of the separation cavity (3).