CN204200190U - A kind of oil field well head desanding device - Google Patents

Abstract

The utility model discloses a kind of oil field well head desanding device, comprise desanding cylinder, described desanding cylinder comprises desanding cylinder body, is arranged on upper pressing cap and the lower pressing cap at described desanding cylinder body both ends, and described desanding cylinder body is provided with fluid inlet and fluid issuing; Described desanding cylinder also comprises: screen casing, and it is arranged in desanding cylinder body; Wherein, described screen casing comprises base tube, tubulose in not overcurrent of the both ends of described base tube and be provided with on their outer circumference and annular protrusion that cylinder inboard wall is fitted to make, between screen casing and desanding cylinder inner body wall, there is certain interval space, described annular protrusion is inlaid with sealing ring to seal to make to be formed between described screen casing and described desanding cylinder inner body wall, and base tube is positioned at the below of fluid inlet to make to treat that desanding fluid enters screen casing inner chamber.Sand control principle used for reference by desanding device described in the utility model, adopts Screen Sand Control Technique to reach desanding object, the screen casing of different filtering accuracy can be selected in advance to improve desanding effect according to the size of impurity.

Description

Wellhead sand removing device for oil field

Technical Field

The utility model relates to a well head desander is used in oil field, one kind can clear away the particle impurity in oil gas field development and the oil gas transport flow, for example a device of stratum sand, fracturing sand, drill chip and rust dirt is applicable to the cleaing away of impurity in oil field oil, gas and water well fluid handling and the ground transport flow.

Background

Due to poor consolidation of the reservoir of the oil and gas reservoir and failure of gravel packing or sand control measures, sand is produced in the production process of the oil and gas well. Formation sand, frac sand, drill cuttings and scale often cause mechanical wear on surface pipelines, nozzles, control valves, transfer pumps and other equipment, and once the oil and gas well sand deposits in surface equipment (e.g., separators) or partially blocks the pipeline openings, in addition to reducing the handling capacity of the equipment, the equipment life is impacted, operating costs are increased, and even safety accidents may occur. In order to avoid the above situation, it is necessary to filter out the impurities in the oil and gas before oil and gas treatment (such as oil and gas separation) and transportation.

Existing wellhead crude oil desanders use a cyclone separation (centrifugation) principle, such as centrifugal wellhead crude oil desanding (ZL200820221482.3), high-efficiency cyclone desanders for oil field wellheads (ZL201210237264.x) and high-efficiency cyclone desanders for oil field wellheads (ZL201220331959. x). The swirler cylinder body diameter is directly proportional to throughput and inversely proportional to the size of the separated solid particles. For different oil and gas well yields and sizes of solid particles to be separated, the body geometric dimension and the cylinder taper (the angle and the length of the cone part) of each sand remover need to be specially designed to improve the sand removing efficiency, so that the universality is low. In addition, the swirler liners are impacted by crude oil and particulate impurities and need to be replaced, increasing the cost of desanding.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the problem that above will solve, designed a well head sand removal device for oil field, the device adopts screen pipe sand control technique to reach the degritting purpose by reference to the sand control principle, and it can be according to the size pre-selection different filter fineness (filter gap, perhaps mesh number) of solid particle (impurity) the screen pipe improvement degritting effect, and need not change a degritting section of thick bamboo.

The utility model provides a technical scheme does:

a wellhead desanding device for an oil field comprises a desanding cylinder, wherein the desanding cylinder comprises a desanding cylinder body, an upper pressing cap and a lower pressing cap, the upper pressing cap and the lower pressing cap are arranged at two end parts of the desanding cylinder body, and a fluid inlet and a fluid outlet are formed in the desanding cylinder body; the sand removal cylinder further comprises:

the screen pipe is arranged in the sand removing cylinder body; wherein,

the screen pipe comprises a base pipe, two end parts of the base pipe are in an overflowing tubular shape, annular bulges attached to the inner wall of the barrel body are arranged on the periphery of the base pipe, a certain gap space is formed between the screen pipe and the inner wall of the sand removing barrel body, sealing rings are inlaid on the annular bulges to seal the screen pipe and the inner wall of the sand removing barrel body, and the base pipe is located below the fluid inlet to enable fluid to be subjected to sand removal to enter the inner cavity of the screen pipe.

Preferably, the screen further comprises: a filter screen made of stainless steel metal; wherein,

the intermediate position of parent tube is the ring frame that constitutes by the support bar of many parallels to parent tube axis direction, the filter screen parcel is in form the overflow part of screen pipe on ring frame's the periphery.

Preferably, the base pipe is welded with a guide pipe coaxial with the base pipe on an annular bulge close to one end of the fluid inlet, the guide pipe is half-opened along the axis of the base pipe, and the opening is opposite to the fluid inlet.

Preferably, the base pipe is welded at one end near the fluid inlet with a lifting ring capable of lifting the screen pipe.

Preferably, the number of the sand removing cylinders is two, fluid inlets of the two sand removing cylinders are respectively connected to the first shunt cabinet through a first conveying pipeline and a second conveying pipeline, and fluid outlets of the two sand removing cylinders are respectively connected to the second shunt cabinet through a third conveying pipeline and a fourth conveying pipeline; wherein,

the first shunt tube cabinet is further connected to an external fluid conveying pipeline to be subjected to sand removal, and a fifth conveying pipeline is further arranged between the first shunt tube cabinet and the second shunt tube cabinet.

Preferably, the first conveying pipeline and the second conveying pipeline are provided with first valves, the third conveying pipeline and the fourth conveying pipeline are provided with second valves, and the fifth conveying pipeline is provided with a third valve.

Preferably, the lower pressing cap is provided with a sewage discharge outlet and is communicated with an external sewage discharge pipeline, and the sewage discharge pipeline is provided with a fourth valve;

wherein, the base pipe is internally provided with a thread structure in an overflow pipe shape at one end far away from the fluid inlet and is in threaded connection with the lower pressing cap with the sewage outlet.

Preferably, the base pipe is provided with a threaded formation in the form of a non-overflow pipe remote from the fluid inlet and in threaded connection with an external plug member.

Preferably, the wellhead sand removing device for the oil field further comprises:

the support comprises a cross beam and a support leg connected with the cross beam and connected with the base in a sliding manner, wherein a plurality of pin holes are formed in the support leg, and the support leg and the base are fixed through pins; wherein,

the two sand removing cylinders are vertically arranged on the base and are positioned below the cross beam.

Preferably, the wellhead sand removing device for the oil field further comprises:

the pneumatic chain block is arranged on the cross beam of the bracket;

wherein the pneumatic chain block can slide between the two sand removing cylinders along the cross beam.

The oil field well head sand removing device for use reaches the sand removal purpose through set up the screen pipe in a sand removing section of thick bamboo, and at the sand removal in-process, can select screen pipe filter fineness (filtering gap, perhaps mesh number) at any time according to the size of granule (grit) in the fluid, grit in the fluid when cleaing away oil gas well production high-efficiently. Further, the utility model discloses a two wings degritting section of thick bamboo design for when washing, changing a wing screen pipe, through operating valve, the flow conveniently changes to another wing degritting section of thick bamboo, does not hinder man-hour, low in use cost. Therefore, the utility model provides a well head sand removal device for oil field suitability is strong, not only is applicable to various fluids of oil field oil, gas and water and mixture well head processing and oil gas transport flow, can be used to the sand removal of the anti-row of fracturing well, open flow in-process moreover.

Drawings

FIG. 1 is a schematic structural view of a wellhead desanding device for an oil field according to the present invention;

fig. 2 is a schematic structural diagram of the screen pipe of the wellhead desanding device for the oil field.

Detailed Description

The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.

As shown in fig. 1-2, the utility model provides a wellhead desanding device for oil field, which comprises a desanding cylinder, wherein the desanding cylinder comprises a desanding cylinder body 1, an upper pressing cap 2 and a lower pressing cap 3, the upper pressing cap and the lower pressing cap are arranged at two ends of the desanding cylinder body, and the desanding cylinder body is provided with a fluid inlet 101 and a fluid outlet 102; simultaneously the sand removal section of thick bamboo still includes: a screen pipe 4 disposed in the sand removing cylinder body; wherein,

the screen pipe comprises a base pipe 401, two end parts of the base pipe are in an overflowing tubular shape, annular protrusions 402 attached to the inner wall of the cylinder body are arranged on the outer periphery of the base pipe, a certain gap space is formed between the screen pipe and the inner wall of the sand removing cylinder body, sealing rings 403 are inlaid on the annular protrusions to enable the screen pipe and the inner wall of the sand removing cylinder body to form sealing, and the base pipe is located below the fluid inlet to enable fluid to be subjected to sand removing to enter the inner cavity of the screen pipe.

Further, the present invention is preferable that the screen pipe further comprises: a filter screen 404 made of stainless steel metal; the middle position of the base pipe is an annular frame formed by a plurality of support bars 405 parallel to the axial direction of the base pipe, and the filter screen is wrapped on the periphery of the annular frame to form an overflowing part of the sieve pipe. The filter screen can adopt filter screens with different meshes according to different impurity particle types and particle sizes.

As seen from figures 1-2, a flow guide pipe 5 coaxial with the base pipe is welded on the annular bulge at one end of the base pipe close to the fluid inlet, the flow guide pipe is half-opened along the axis of the base pipe, and the opening of the flow guide pipe is opposite to the fluid inlet. Like this, the honeycomb duct of half arc shape can prevent effectively that the fluid from to the impact of section of thick bamboo wall and then having influenced the leakproofness between screen pipe and the sand removal barrel body when getting into the sand removal barrel body, plays the water conservancy diversion effect to the fluid.

As can be seen from FIG. 1, the base pipe of the present invention is located at the upper part of the sand removing cylinder at the end near the fluid inlet, and for the convenience of replacing the screen pipe, it is preferable that the base pipe is welded with a hanging ring 406 (FIG. 2) at the end near the fluid inlet for hanging up the screen pipe.

In the wellhead desanding device for the oil field, the number of the desanding cylinders is two, the fluid inlets of the two desanding cylinders are respectively connected to a first shunt cabinet 20 through a first conveying pipeline 6 and a second conveying pipeline 7, and the fluid outlets are respectively connected to a second shunt cabinet 21 through a third conveying pipeline 8 and a fourth conveying pipeline 9; the first shunt tube cabinet is further connected to an external fluid conveying pipeline 22 to be degritted, and a fifth conveying pipeline 10 is further arranged between the first shunt tube cabinet and the second shunt tube cabinet. The first conveying pipeline and the second conveying pipeline are provided with a first valve 11, the third conveying pipeline and the fourth conveying pipeline are provided with a second valve 12, and the fifth conveying pipeline is provided with a third valve 13.

Here, the fifth transfer line corresponds to a bypass line through which the fluid flows directly into the next process without passing through the sand removal cylinder when the fluid is free of sand or contains little sand. When the fluid contains sand and needs to be filtered, the third valve 13 is required to be closed to close the bypass line and close the conveying line of one wing of the sand removing cylinders, so that the fluid is guided into the other wing of the sand removing cylinders for filtering. And the filtered fluid flows into the second shunt pipe cabinet through the third conveying pipeline or the fourth conveying pipeline and is output to the next process from the second shunt pipe cabinet.

Here, the utility model provides a sand control technology of screen pipe has been adopted to the sand removing device, treat that the fluid of degritting enters into the sand removing section of thick bamboo from the fluid import on one of them wing sand removing section of thick bamboo barrel through first shunt tubes cabinet in, and the open position who passes the honeycomb duct enters into the screen pipe inner chamber, because be equipped with the filter screen on the screen pipe, consequently can stay the screen pipe inner chamber with the particle impurity in the fluid in, and the fluid of filtering impurity just flows into in the annular space of screen pipe and barrel, the rethread fluid outlet can discharge the fluid of filtering impurity to the outside. When sand in the sand removing cylinder of one wing needs to be replaced (whether the sieve tube needs to be replaced is judged according to the pressure difference between the two ends of the sand removing cylinder at the upstream and the downstream), the flow is guided to the sand removing cylinder of the other wing, the sand removing flow is ensured to be uninterrupted, sand can be discharged in time, or the sieve tube is replaced for subsequent use.

The utility model discloses in, can select the cap that pushes down of two kinds of models: the first one is with bottom block and the second one is with outlet. When the sand removing device is used for removing sand from acid fracturing drainage, because the return fluid contains a large amount of fracturing sand, a lower pressing cap with an outlet is preferably used for continuously removing sand, namely, the sand is also discharged while the sieve tube filters the sand. When the flow is used for removing less sand, the lower pressing cap with the bottom plug is preferably used, and the sand is discharged intermittently, namely the lower pressing cap is opened to discharge the sand after the sand filtration of the sieve tube is finished.

From the above, when the lower pressing cap with the sewage discharge outlet is adopted, the lower pressing cap is communicated with an external sewage discharge pipeline 14, and the sewage discharge pipeline is provided with a fourth valve 15; at this time, the base pipe is provided with a thread structure in a non-flow tubular shape (the lower end of the desanding cylinder in fig. 1) at one end far away from the fluid inlet, and the thread structure is in threaded connection with the lower pressing cap with the sewage outlet. That is, the lower pressure cap is connected to both the cylinder and the screen by threads. When the screen pipe needs to be replaced, the press cap needs to be unscrewed and loosened from the screen pipe, and the screen pipe is lifted from the upper part. In a further alternative, the base pipe is provided with a threaded formation in the form of a non-return pipe at the end remote from the fluid inlet, which is in threaded connection with an external plug member (not shown). The sieve tube is not connected with the lower pressing cap, the lower end of the sieve tube is directly plugged by a plug, and then when sand removal is finished or the sieve tube needs to be replaced, the sieve tube is directly lifted to pour out sand impurities in the sieve tube. The pressing cap can be provided with a bottom plug.

As can be seen from figure 1, the utility model provides a well head sand removing device for oil field still includes: a base 16, on which a support which can be extended and retracted in the vertical direction is arranged, the support comprises a beam 17 and a support leg 18 which is connected with the beam and is in sliding connection with the base, the support leg is provided with a plurality of pin holes (not shown) which are fixed with the base through pins; the two sand removing cylinders are vertically arranged on the base and are positioned below the cross beam. Then, a pneumatic chain block 19 is arranged on the cross beam of the bracket, and the pneumatic chain block can slide between the two sand removing cylinders along the cross beam.

The utility model provides a sand removing device is when changing the screen pipe, at first opens the relief valve, within pressure release to the safety range to sand removing barrel internal pressure, opens the last pressure cap of upper end again, changes the screen pipe operation. In the process of screen pipe replacement, the telescopic bracket scheme is designed in consideration of the time allowed by the operation and the labor intensity of field operators, and when in actual use, the telescopic bracket can be lifted by a crane and fixed by pins.

The oil field well head sand removing device for use reaches the sand removal purpose through set up the screen pipe in a sand removing section of thick bamboo, and at the sand removal in-process, can select screen pipe filter fineness (filtering gap, perhaps mesh number) at any time according to the size of granule (grit) in the fluid, grit in the fluid when cleaing away oil gas well production high-efficiently. Further, the utility model discloses a two wings degritting section of thick bamboo design for when washing, changing a wing screen pipe, through operating valve, the flow conveniently changes to another wing degritting section of thick bamboo, does not hinder man-hour, low in use cost. Therefore, the utility model provides a well head sand removal device for oil field suitability is strong, not only is applicable to various fluids of oil field oil, gas and water and mixture well head processing and oil gas transport flow, can be used to the sand removal of the anti-row of fracturing well, open flow in-process moreover.

While the embodiments of the invention have been described above, it is not intended to be limited to the details shown, or described, but rather to cover all modifications, which would come within the scope of the appended claims, and all changes which come within the meaning and range of equivalency of the art are therefore intended to be embraced therein.

Claims (10)

1. A wellhead desanding device for an oil field comprises a desanding cylinder, wherein the desanding cylinder comprises a desanding cylinder body, an upper pressing cap and a lower pressing cap, the upper pressing cap and the lower pressing cap are arranged at two end parts of the desanding cylinder body, and a fluid inlet and a fluid outlet are formed in the desanding cylinder body; its characterized in that, a sand removal section of thick bamboo still includes:

the screen pipe is arranged in the sand removing cylinder body; wherein,

the screen pipe comprises a base pipe, two end parts of the base pipe are in an overflowing tubular shape, annular bulges attached to the inner wall of the barrel body are arranged on the periphery of the base pipe, a certain gap space is formed between the screen pipe and the inner wall of the sand removing barrel body, sealing rings are inlaid on the annular bulges to seal the screen pipe and the inner wall of the sand removing barrel body, and the base pipe is located below the fluid inlet to enable fluid to be subjected to sand removal to enter the inner cavity of the screen pipe.

2. The apparatus of claim 1, wherein the screen further comprises: a filter screen made of stainless steel metal; wherein,

the intermediate position of parent tube is the ring frame that constitutes by the support bar of many parallels to parent tube axis direction, the filter screen parcel is in form the overflow part of screen pipe on ring frame's the periphery.

3. The apparatus of claim 2, wherein the base pipe has a flow guide pipe welded to the annular projection near the fluid inlet, the flow guide pipe being coaxial with the base pipe and being half-open along the axis of the base pipe and facing the fluid inlet.

4. A wellhead sand removal device as claimed in claim 3, wherein said base pipe is further welded at an end adjacent said fluid inlet with a lifting eye for lifting said screen.

5. The apparatus of any of claims 1 to 4, wherein there are two sand removal cylinders, the fluid inlets of the two sand removal cylinders are connected to the first distribution box through a first and a second transfer line, respectively, and the fluid outlets of the two sand removal cylinders are connected to the second distribution box through a third and a fourth transfer line, respectively; wherein,

the first shunt tube cabinet is further connected to an external fluid conveying pipeline to be subjected to sand removal, and a fifth conveying pipeline is further arranged between the first shunt tube cabinet and the second shunt tube cabinet.

6. A wellhead desanding device as claimed in claim 5, wherein the first and second transfer lines are provided with first valves, the third and fourth transfer lines are provided with second valves, and the fifth transfer line is provided with third valves.

7. The wellhead desanding device for the oil field according to claim 1, wherein the lower pressure cap is provided with a sewage discharge outlet and is communicated with an external sewage discharge pipeline, and the sewage discharge pipeline is provided with a fourth valve;

wherein, the base pipe is internally provided with a thread structure in an overflow pipe shape at one end far away from the fluid inlet and is in threaded connection with the lower pressing cap with the sewage outlet.

8. A wellhead sand removal device for oil field applications as claimed in claim 1, wherein said base pipe is threaded within an overflow tubular portion remote from said fluid inlet and is threadably connected to an external plug member.

9. A wellhead desanding apparatus for oil field applications as claimed in claim 2 further comprising:

the support comprises a cross beam and a support leg connected with the cross beam and connected with the base in a sliding manner, wherein a plurality of pin holes are formed in the support leg, and the support leg and the base are fixed through pins; wherein,

the two sand removing cylinders are vertically arranged on the base and are positioned below the cross beam.

10. A wellhead desanding apparatus for oil field applications as claimed in claim 9 further comprising:

the pneumatic chain block is arranged on the cross beam of the bracket;

wherein the pneumatic chain block can slide between the two sand removing cylinders along the cross beam.