CN209483327U - The gas anchor of coal bed gas well - Google Patents
The gas anchor of coal bed gas well Download PDFInfo
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- CN209483327U CN209483327U CN201822009536.6U CN201822009536U CN209483327U CN 209483327 U CN209483327 U CN 209483327U CN 201822009536 U CN201822009536 U CN 201822009536U CN 209483327 U CN209483327 U CN 209483327U
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Abstract
The utility model discloses a kind of gas anchors of coal bed gas well, are related to coal-bed gas exploitation field.The gas anchor includes: top connection, the first oil pipe, the second oil pipe and silk plug.Second oil pipe is arranged in first oil pipe, and the top connection, the first oil pipe and the silk plug are successively detachably connected, which is detachably connected with second oil pipe.Gas anchor provided by the utility model is detachably connected between each component, therefore when needing replacing a component of the gas anchor, the component can directly be replaced, without replacing entire gas anchor, so as to reduce the replacement cost of the gas anchor, and then it is effectively saved the cost of winning of coal bed gas well.
Description
Technical field
The utility model relates to coal-bed gas exploitation field, in particular to a kind of gas anchor of coal bed gas well.
Background technique
Gas anchor is the device that coal bed gas well is arranged in for realizing gas-liquid separation, can be to avoid being arranged in coal bed gas well
Mining pump is influenced by the coal bed gas in coal bed gas well and is unable to operate normally.
In the related technology, gas anchor mainly has a multiple types such as gravity type, spiral and more glass of equal flow type, in these gas anchors
Each component between be welded to connect.
But gas anchor in the related technology, when needing replacing some component, is needed due to being welded to connect between each component
Entire gas anchor is replaced, replacement cost is higher.
Utility model content
The utility model provides a kind of gas anchor of coal bed gas well, can solve the replacement cost of gas anchor in the related technology
Higher problem.The technical solution is as follows:
A kind of gas anchor of coal bed gas well, the gas anchor include: top connection, the first oil pipe, the second oil pipe and silk plug；
Second oil pipe is arranged in first oil pipe, and the outer diameter of second oil pipe is less than first oil pipe
Internal diameter, the length of second oil pipe is less than the length of first oil pipe；
One end of the top connection is detachably connected with one end of first oil pipe and second oil pipe one end respectively,
The other end of the top connection is for connecting mining tubing string；
First oil pipe is provided with multiple through-holes close to one end of the top connection, and the length of first oil pipe is greater than
First threshold；
One end of the other end and the silk plug of first oil pipe is detachably connected.
Optionally, first oil pipe includes: screen casing, tail pipe and box cupling；
The multiple through-hole is provided on the screen casing, and one end of the screen casing and one end of the top connection are detachable
Connection, the other end of the screen casing and one end of the box cupling are detachably connected；
The other end of the box cupling and one end of the tail pipe are detachably connected, the other end of the tail pipe and the silk plug
It is detachably connected.
Optionally, the screen casing is drilling screen casing or wire-wrapped screen.
Optionally, the length of the screen casing is 3 meters to 5 meters, and the length of the tail pipe is 20 meters to 40 meters；
The length of second oil pipe is 15 meters to 30 meters.
Optionally, the outer diameter of the screen casing is 73 millimeters, and internal diameter is 62 millimeters；
The outer diameter of the tail pipe is 73 millimeters, and internal diameter is 62 millimeters.
Optionally, the top connection is hollow tube body, and the inner wall of one end of the top connection is stepped, the rank
Screw thread is provided on the inner wall of scalariform；
One end of first oil pipe is threadedly coupled with the step in the stair-stepping inner wall；
One end of second oil pipe is threadedly coupled with the another step in the stair-stepping inner wall.
Optionally, the outer diameter of second oil pipe is 40 millimeters, and internal diameter is 32 millimeters；
Alternatively, 48 millimeters of the outer diameter of second oil pipe, internal diameter is 40 millimeters.
Optionally, the diameter of each through-hole is 2 millimeters to 8 millimeters.
Optionally, the range of the spacing between the other end of the silk plug and the other end of second oil pipe be 5 meters extremely
20 meters.
Optionally, the silk plug is starting taper silk plug, and the end face of the silk plug other end is spherical surface.
The beneficial effect of technical solution provided by the utility model includes at least:
The utility model embodiment provides a kind of gas anchor of coal bed gas well, which may include top connection, the first oil
Pipe, the second oil pipe and silk plug.Second oil pipe is arranged in first oil pipe, the top connection, the first oil pipe and the silk plug
It is successively detachably connected, which is detachably connected with second oil pipe.Gas anchor provided by the embodiment of the utility model, each group
It is detachably connected between part, therefore when needing replacing a component of the gas anchor, the component can be directly replaced, without more
Entire gas anchor is changed, so as to reduce the replacement cost of the gas anchor, and then is effectively saved the cost of winning of coal bed gas well.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the gas anchor of coal bed gas well provided by the embodiment of the utility model；
Fig. 2 is the structural schematic diagram of the gas anchor of another coal bed gas well provided by the embodiment of the utility model；
Fig. 3 is the structural schematic diagram of the gas anchor of another coal bed gas well provided by the embodiment of the utility model.
Specific embodiment
It is practical new to this below in conjunction with attached drawing to keep the purpose of this utility model, technical solution and advantage clearer
Type embodiment is described in further detail.
In order to reduce influence of the coal bed gas extraction to environment, reduce the drilling well occupied area of coal bed gas well, reduce expropriation of land at
This, while expanding the desorption area of coal bed gas well, form the exploitation well type of horizontal seam gas well.In the horizontal seam gas well
Mining initial stage carries out mining, the straight well to the water horizontal seam gas well usually using the straight well tubular column structure of vertical coal bed gas well
Tubular column structure includes tail pipe, mining pump and mining tubing string, wherein mining tubing string is placed in horizontal segment.At this point, the horizontal seam gas well
Pit shaft in gas-liquid do not separate, bulk gas enters mining tubing string, and is entered in mining pump by mining tubing string, pumps mining
There is the phenomenon that serious gas blowby or even gas lock aneroid, the normal operation of mining pump is influenced, so as to cause the horizontal seam gas well
Flowing bottomhole pressure (FBHP) fluctuates widely, and does not meet the demand that coal bed gas well stablizes mining.
Therefore, gas anchor can be set in the horizontal seam gas well, to realize the gas-liquid separation in pit shaft, avoids the level
Coal bed gas in coal bed gas well enters in mining pump, influences the normal work of mining pump.Current gas anchor mainly has: gravity type,
Spirally, the multiple types such as spiral-flow type, centering type, multistage separating, more glasss of equal flow types and spiral cover type Mobyneb.Wherein,
Gravity type gas anchor, spiral gas anchor and multi-cup uniform flux gas anchor are mainly used for Vertical Well (also referred to as straight well) or gradient is lesser tiltedly
In well, in horizontal seam gas well, it is unable to reach ideal effect.Spiral-flow type gas anchor, centering type gas anchor, multistage separating gas anchor,
Spiral cover type Mobyneb gas anchor can be used in the biggish inclined shaft of gradient and horizontal well, but be mainly used in oil well.If being used for
It in coal bed gas well, is much limited, can not effectively achieve the effect that gas-liquid separation.
Currently, mainly using spiral-flow type gas anchor, spiral cover type Mobyneb gas anchor and centering type gas in horizontal seam gas well
Anchor.Since the production fluid of horizontal seam gas well is mainly water, and contain a large amount of particulate matters (such as coal dust, pressure break in the production fluid
Sand), at the same different mining stage Liquid outputs variation greatly, therefore the variation of the particle concentration in different mining stages also compared with
Greatly, such gas anchor practicability is lower, is unable to satisfy the requirement in different mining stages, thus easily occur blocking, separating effect compared with
The problem of difference.
The utility model embodiment provides a kind of gas anchor of coal bed gas well, can be used for hole angle (also referred to as hole deviation) and is greater than
In the coal bed gas well of 40 ° (degree), namely it can be used in the biggish inclined shaft of gradient or horizontal well.The gas anchor can solve related skill
The lower problem of the practicability of gas anchor in art, and can solve the higher problem of gas anchor replacement cost in the related technology.
As shown in Figure 1, the gas anchor may include: top connection 01, the first oil pipe 02, the second oil pipe 03 and silk plug 04.It should
Second oil pipe 03 is arranged in first oil pipe 02, and the outer diameter of second oil pipe 03 is less than the internal diameter of first oil pipe 02, should
The length of second oil pipe 03 is less than the length of first oil pipe 02.It that is to say, between first oil pipe 02 and second oil pipe 03
It could be formed with annular space, and also have between second oil pipe 03 and the silk plug 04 at regular intervals.Wherein, first oil pipe
02 can be with 03 coaxial line of the second oil pipe.
One end of the top connection 01 is detachably connected with one end of first oil pipe 02 and 03 one end of the second oil pipe respectively,
The other end of the top connection 01 is for connecting mining tubing string (not shown in figure 1).First oil pipe 02 is close to the top connection 01
One end is provided with multiple through-holes 0211, and the length of first oil pipe 02 is greater than first threshold.And the other end of first oil pipe 02
It is detachably connected with one end of the silk plug 04.Exemplary, which may range from 23 meters (m) to 45m.
In conclusion the utility model embodiment provides a kind of gas anchor of coal bed gas well, the gas anchor may include on connect
Head, the first oil pipe, the second oil pipe and silk plug.Second oil pipe be arranged in first oil pipe, the top connection, the first oil pipe with
And the silk plug is successively detachably connected, which is detachably connected with second oil pipe.It is provided by the embodiment of the utility model
Gas anchor is detachably connected between each component, therefore when needing replacing a component of the gas anchor, can directly replace the group
Part so as to reduce the replacement cost of the gas anchor, and then is effectively saved opening for coal bed gas well without replacing entire gas anchor
Adopt cost.
Also, due to being detachably connected between each component of the gas anchor, it is directed to the different minings of same coal seam gas well
It in the stage, according to the particle concentration of the different phase, can determine the first oil pipe 02 of different size, and flexibly replace the gas
The first oil pipe 02 in anchor.Therefore the gas anchor can satisfy the requirement in different mining stages, and practicability is stronger.Wherein, this first
The specification of oil pipe 02 may include the big of the length of first oil pipe 02 and the diameter of the through-hole 0211 on first oil pipe 02
It is small.
In the utility model embodiment, which can be hollow tube body, and one end of the top connection 01
Inner wall is stepped, is provided with screw thread on the stair-stepping inner wall.Correspondingly, the one of first oil pipe 02 and second oil pipe 03
The outer wall at end is provided with screw thread.One end of first oil pipe 02 is threadedly coupled with the step in the stair-stepping inner wall,
One end of second oil pipe 02 is threadedly coupled with the another step in the stair-stepping inner wall.Wherein, with first oil pipe 02
The internal diameter of the step of connection is greater than the internal diameter for the another step connecting with second oil pipe 03.
It that is to say, the inner wall of top connection 01 could be formed with two coaxial but different diameter screw threads, which can
To be connect respectively with first oil pipe 02 and second oil pipe 03.The screw thread being relatively large in diameter in two screw threads can with this
The connection of one oil pipe 02, the lesser screw thread of diameter can be connect with second oil pipe 03.Optionally, each screw thread can be flat for standard
Formula oil pipe thread.
Optionally, the outer diameter of the top connection 01 can be 89 millimeters (mm), and the other end of the top connection 01 is also formed with silk
Button, and the diameter of the screw thread can be equal with the outer diameter of the mining tubing string.Exemplary, the outer diameter of the mining tubing string can be
73mm, correspondingly, the diameter of the screw thread can be 73mm.
Fig. 2 is the structural schematic diagram of another gas anchor provided by the embodiment of the utility model.Referring to fig. 2, first oil pipe
02 may include: screen casing 021, tail pipe 022 and box cupling 023.
Multiple through-holes 0211 are provided on the screen casing 021, and one end of the screen casing 021 and one end of the top connection 01 are removable
Connection is unloaded, the other end of the screen casing 021 and one end of the box cupling 023 are detachably connected.The other end of the box cupling 023 and the tail pipe
022 one end is detachably connected, and the other end of the tail pipe 022 and one end of the silk plug 04 are detachably connected.
Wherein, multiple through-hole 0211 can uniformly arrange along the length direction of the screen casing 021, and can be along the screen casing
021 circumferential uniformly arrangement.Also, the axis of each through-hole 0211 can be vertical with the axis of the screen casing 021.
Exemplary, the outer wall at the both ends of screen casing 021 is provided with screw thread, and the inner wall at the both ends of the box cupling 023 is provided with
The outer wall of screw thread, the both ends of the tail pipe 022 is provided with screw thread, and the inner wall of one end of the silk plug 04 is provided with screw thread.The screen casing 021
One end connect with the threaded one end of the top connection 01, the other end of the screen casing 021 is connect with the threaded one end of the box cupling 023.
The other end of the box cupling 023 is connect with the threaded one end of the tail pipe 022, one end of the other end of the tail pipe 022 and the silk plug 04
It is threadedly coupled.
It should be noted that the screen casing 021 is the first oil by the total length after box cupling 023 is connect with the tail pipe 022
The length of pipe 02.
Optionally, which can be drilling screen casing or wire-wrapped screen.Or, or cutting seam sieve tube.The tail pipe
022 can be plain end oil well pipe.The other assemblies of the screen casing 021 and the tail pipe 022 and the gas anchor are easily in the well of coal bed gas well
It is obtained in, and cost is relatively low for each component, therefore the manufacture efficiency of the gas anchor is higher, and manufacturing cost is lower.
In the utility model embodiment, the length of the screen casing 021 is 3m to 5m, and the length of the tail pipe 022 can be 20m
To 40m.The length of second oil pipe 03 is 15m to 30m.The length of the box cupling 023 can be 0.13m.Wherein, second oil pipe
03 length can be determined according to the tilt angle at the position of the gas anchor to be placed in the coal bed gas well.Also, second oil
The length of pipe 03 can be positively correlated with the size of the tilt angle namely the length of second oil pipe 03 can be with the tilt angle
Increase and increase, when guaranteeing that the gas anchor is placed in the coal bed gas well, the screen casing 021 and tail pipe 022 of the gas anchor with this
The height of annular space (can also become separation chamber) between two oil pipes 03 is larger, can effectively realize gas-liquid separation.Wherein,
Tilt angle at the position of the gas anchor to be placed, the also hole deviation at the position of the gas anchor as to be placed.The annular space
Short transverse is parallel to gravity direction.
Since, without sump hole, gravity type gas anchor in the related technology is placed in the horizontal seam gas well in the coal bed gas well
When, particulate matter (such as fracturing sand, coal dust) blocking easily deposited in pit shaft causes the gravity type gas anchor can not work normally.
Wherein, sump hole refers to the space between the shaft bottom of coal bed gas well and coal seam bottom, settled on the borehole wall of coal bed gas well
Grain object can store in the sump hole.
Gas anchor provided by the embodiment of the utility model can configure different length according to the size of the concentration of particulate matter in pit shaft
The screen casing 021 of degree and the tail pipe 022 of different length, when guaranteeing that the gas anchor is arranged in coal bed gas well of the hole deviation greater than 40 °,
It will not be blocked by the particulate matter in pit shaft.Wherein, the length of the screen casing 021 and the length of the tail pipe 022 can be according to coal seams
The concentration of particulate matter in the pit shaft of gas well determines, and the length of the screen casing 021 and the length of the tail pipe 022 can with this
The concentration of grain object is directly proportional.It that is to say, the concentration of the particulate matter in the pit shaft is higher, the length of the screen casing 021 and the tail pipe 022
Length it is also longer, block the screen casing 021 to prevent particulate matter in the pit shaft from depositing, the gas anchor caused to can not work normally.
Optionally, the length of the screen casing 021 can be 3 meters to 5 meters, and the length of the tail pipe 022 can be 20 meters to 40 meters.
When the concentration of the particulate matter in the pit shaft is smaller, the length of the screen casing 021 can be 3 meters, and the length of the tail pipe 022 can be
20 meters.When the concentration of the particulate matter is larger, the length of the screen casing 021 can be 5 meters, and the length of the tail pipe 022 can be 40
Rice.
In the utility model embodiment, the internal diameter of the box cupling 023 can be equal to the outer diameter and the tail pipe of the screen casing 021
022 outer diameter, to guarantee that the box cupling 023 can link together the screen casing 021 and the tail pipe 022.The screen casing 021 and the tail
The internal diameter of pipe 022 can be equal, and the outer diameter of second oil pipe 03 can be less than the internal diameter and the tail pipe 022 of the screen casing 021
Internal diameter, to guarantee to could be formed with annular space between second oil pipe 03 and the screen casing 021 and the tail pipe 022, with into
Row gas-liquid separation.
In an optional implementation manner, the outer diameter of the screen casing 021 can be equal with the outer diameter of the tail pipe 022.Accordingly
, the internal diameter at the both ends of the box cupling 023 is equal, so as to which the screen casing 021 links together with tail pipe 022.
Exemplary, the outer diameter of the screen casing 021 can be 73mm (such as drilling screen casing), and the outer diameter of the tail pipe 022 can also be with
For 73mm, the internal diameter of the screen casing 021 and the tail pipe 022 can be 62mm.Correspondingly, the internal diameter at the both ends of the box cupling 023 can
With equal, and the outer diameter of the screen casing 021 or the outer diameter of the tail pipe 022 can be equal to, such as the internal diameter of the box cupling 023 can be
73mm。
In another optional implementation, the outer diameter of the screen casing 021 and the outer diameter of the tail pipe 022 can not be waited.Phase
It answers, the internal diameter at the both ends of the box cupling 023 can not wait, to ensure to link together in the screen casing 021 and tail pipe 022.
Exemplary, the outer diameter of the screen casing 021 can be 89mm (such as wire-wrapped screen), and the outer diameter of the tail pipe 022 is 73mm,
And the internal diameter of the screen casing 021 and the tail pipe 022 can be 62mm, then the internal diameter at the both ends of the box cupling 023 differs, with the screen casing
The internal diameter of one end of 021 connection is greater than the internal diameter of the one end connecting with the tail pipe 022, and the internal diameter at both ends is equal to and is correspondingly connected with
Component outer diameter.For example, the internal diameter of one end that the box cupling 023 is connect with the screen casing 021 can be 89mm, it is connect with the tail pipe
The internal diameter of one end can be 73mm.
Optionally, when the internal diameter difference at the both ends of the box cupling 023, the tube body which can be constant for outer diameter,
That is the wall thickness at the both ends of the box cupling 023 is different.Such as the box cupling 023 can be the tube body of 88.9mm, and the wall of one end for outer diameter
Thickness can be less than the wall thickness of the other end.Or the both ends of the box cupling 023 or stepped tube body namely the box cupling 023
Outer diameter is different, but wall thickness can be identical.Such as the wall thickness of box cupling 023 can be 12.5mm, and the outer diameter of one end is greater than the other end
Outer diameter.The utility model embodiment without limitation, need to only guarantee the internal diameter at the both ends of the box cupling 023 to the shape of box cupling 023
It is matched respectively with the outer diameter for the component being correspondingly connected with.
Optionally, gas anchor provided by the embodiment of the utility model can be configured with the second oil pipe 03 of different size.Wherein,
The specification of second oil pipe 03 can refer to the internal diameter and outer diameter of the second oil pipe 03.Exemplary, which can be outer diameter
For 40mm, internal diameter is the tube body of 32mm, or can be outer diameter is 48mm, and internal diameter is the tube body of 40mm.Second oil pipe 03
Specification can be determined according to the size of the discharge rate of the horizontal seam gas well (also referred to as liquid measure).Wherein, discharge rate refers to the coal
Layer gas well Liquid output hourly.The discharge rate can be predefined according to the mining system and hole condition of coal bed gas well.Wherein,
The hole condition of the coal bed gas well refers to the actual conditions of the coal bed gas well.Optionally, the discharge rate threshold value can for 40 cubic metres/it is small
When (m3/h)。
When the discharge rate of the horizontal seam gas well is greater than the discharge rate threshold value, biggish second oil pipe of internal diameter can choose
03.When the discharge rate of the horizontal seam gas well is less than the discharge rate threshold value, lesser second oil pipe 03 of internal diameter can choose.
It is exemplary, when the discharge rate of the coal bed gas well is greater than 40m3When/h, can choose outer diameter is 48mm, internal diameter 40mm
The second oil pipe 03.When the discharge rate of the coal bed gas well is less than 40m3When/h, can choose outer diameter is 40mm, and internal diameter is 32mm's
Second oil pipe 03.
In the utility model embodiment, which can be inclined at hole deviation and be more than in 40 ° of coal bed gas wells, namely should
There is certain angle between the length direction and gravity direction of gas anchor.Optionally, which can be greater than 40 °.The coal bed gas
The mixed liquor that gas and water, particulate matter in the pit shaft of well are formed can be under the action of mining pumps, by coal close on screen casing 021
The through-hole 0211 of the layer bottom of layer enters the inside of screen casing 021.And the particulate matter being relatively large in diameter can be barred from this by screen casing 021
Outside screen casing 021.
Optionally, the size of the diameter of each through-hole 0211 can pump institute's energy according to the mining being arranged in the coal bed gas well
The diameter of the particulate matter of receiving determines, and the diameter of the through-hole 0211 can be less than or equal to what mining pump can bear
The diameter of particulate matter avoids the particulate matter from entering mining to guarantee preferably stop the particulate matter in coal bed gas well
In pump, mining pump is caused to wear, to influence the normal use of mining pump.Optionally, the diameter model of each through-hole 0211
Enclosing can be 2mm to 8mm.
In the utility model embodiment, the shape of the cross section of the through-hole 0211 can be round or polygon (example
Such as rectangle), the utility model embodiment to the shape of the through-hole 0211 without limitation.When the shape of the cross section of the through-hole 0211
When for circle, the diameter of the through-hole 0211 is the circular diameter.When the shape of the cross section of the through-hole 0211 is polygon
When, the diameter of the through-hole 0211 is the external diameter of a circle of the polygon.
Optionally, which can be the fracturing sand in coal bed gas well, coal ash etc..The diameter of the particulate matter can pass through
In the similar well of the coal bed gas well or neighbouring well, the diameter of the particulate matter in coal bed gas well produced is determined.Alternatively, can root
It is determined according to the diameter of the particulate matter in the production fluid of the coal bed gas well.The utility model embodiment does not limit this.
Exemplary, when the diameter for the particulate matter that mining pump can bear is 5mm, then the diameter of the through-hole 0211 can be small
In or equal to 5mm, it is blocked in outside screen casing 021 so as to the particulate matter by diameter greater than 5mm.
In the utility model embodiment, mixed liquor into the screen casing 021 can be along the tail pipe 022 and second oil
The annular space of pipe 03 is flowed to the direction close to the silk plug 04, finally under the swabbing action of mining pump, passes through the second oil pipe
03 is discharged the well head of the coal bed gas well.Wherein, since coal bed gas (also referred to as natural gas) density in the coal bed gas well is far below water,
Therefore it can be moved in the form of bubble to the direction close to top connection 01, and the movement rate of the bubble is greater than the mixed liquor
Flow rate.Therefore, bubble will not flow to one end of the second oil pipe 03 with mixed liquor, but gradually be gathered in screen casing 021
Close to the side on the layer top in coal seam, the screen casing 021 finally is discharged by the through-hole 0211, that is, realizes gas-liquid separation.
And the water and particulate matter in mixed liquor is when flowing to the endface of 03 other end of the second little oil pipe, the biggish particle of density
Object is greater than the viscous force of mixed liquor due to suffered gravity, can be deposited on tail pipe 022 and the silk plug 04 is formed by space (also referred to as
Sand setting room) in.The height in the space can spacing between the silk plug 04 and the other end of second oil pipe 03, and the space
Short transverse be parallel to the length direction of the gas anchor.
Optionally, spacing between the other end of the silk plug 04 and the other end of second oil pipe 03 may range from 5m
To may range from for the spacing between the end face of the other end of the inner face and second oil pipe 03 of 20m namely the silk plug 04
5m to 20m.Wherein, the spacing between the silk plug 04 and second oil pipe 03 can be true according to the concentration of deposit in the mixed liquor
It is fixed, and the spacing is directly proportional to the concentration.That is, the concentration of the deposit is bigger, the spacing is also bigger.
Exemplary, which can be starting taper silk plug, and the side wall of the one end of the starting taper silk plug 04 far from top connection 01 can
Think the conical surface.Also, as shown in figure 3, the end face of 04 other end of starting taper silk plug can be spherical surface, with guarantee can be by the gas anchor
It smoothly transfers into the coal bed gas well, will not block.The utility model embodiment to the end face of the other end of the silk plug 04 not
It limits, only need to guarantee smoothly transfer the gas anchor into coal bed gas well under the action of silk plug 04.
In the utility model embodiment, the length of the screen casing 021 of the gas anchor, the length of tail pipe 022, the second oil pipe 03
The diameter of length and the through-hole 0211 can be and flexible according to the hole condition of the coal bed gas well depending on the hole condition of coal bed gas well
Combination, therefore the using flexible of the gas anchor is higher.In addition, the different production phases of same coal seam gas well are directed to, it can basis
The through-hole 0211 of the size selection different-diameter size of the diameter for the particulate matter that mining pump can bear, and according to the through-hole 0211
Different screen casings 021 is replaced, without replacing entire gas anchor, therefore the practicability of the gas anchor is stronger.
In utility model embodiment, by taking gas anchor shown in Fig. 2 as an example, the installation method of the gas anchor is introduced.It is first
First, the other end of tail pipe 022 is connect with one end of the silk plug 04, and by the one of the other end of the box cupling 023 and the tail pipe 022
End connection.Secondly, one end of the box cupling 023 is connect with the other end of the screen casing 021.It then, will be in the insertion of the second oil pipe 03
It states in the structure connected, then one end of second oil pipe 03 is connect with one end of the top connection 01.Finally, again by top connection
01 one end is connect with one end of the screen casing 021.So far, the installation of entire gas anchor is completed.
In conclusion the utility model embodiment provides a kind of gas anchor of coal bed gas well, the gas anchor may include on connect
Head, the first oil pipe, the second oil pipe and silk plug.Second oil pipe be arranged in first oil pipe, the top connection, the first oil pipe with
And the silk plug is successively detachably connected, which is detachably connected with second oil pipe.It is provided by the embodiment of the utility model
Gas anchor is detachably connected between each component, therefore when needing replacing a component of the gas anchor, can directly replace the group
Part so as to reduce the replacement cost of the gas anchor, and then is effectively saved opening for coal bed gas well without replacing entire gas anchor
Adopt cost.Furthermore.Since the gas anchor is provided with silk plug, the mining tubing string can be blocked to avoid the mixed liquor in the coal bed gas well
Feed pathway avoids down-hole string from breaking down, so as to extend pump detection period.
The foregoing is merely the exemplary embodiments of the utility model, are not intended to limit the utility model, all in this reality
Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the utility model
Within protection scope.
Claims (10)
1. a kind of gas anchor of coal bed gas well, which is characterized in that the gas anchor include: top connection, the first oil pipe, the second oil pipe and
Silk plug；
Second oil pipe is arranged in first oil pipe, and the outer diameter of second oil pipe is less than the interior of first oil pipe
Diameter, the length of second oil pipe are less than the length of first oil pipe；
One end of the top connection is detachably connected with one end of first oil pipe and second oil pipe one end respectively, described
The other end of top connection is for connecting mining tubing string；
First oil pipe is provided with multiple through-holes close to one end of the top connection, and the length of first oil pipe is greater than first
Threshold value；
One end of the other end and the silk plug of first oil pipe is detachably connected.
2. gas anchor according to claim 1, which is characterized in that first oil pipe includes: screen casing, tail pipe and box cupling；
The multiple through-hole is provided on the screen casing, and one end of the screen casing and one end of the top connection detachably connect
It connects, the other end of the screen casing and one end of the box cupling are detachably connected；
The other end of the box cupling and one end of the tail pipe are detachably connected, and the other end of the tail pipe and the silk plug are removable
Unload connection.
3. gas anchor according to claim 2, which is characterized in that the screen casing is drilling screen casing or wire-wrapped screen.
4. gas anchor according to claim 2, which is characterized in that
The length of the screen casing is 3 meters to 5 meters, and the length of the tail pipe is 20 meters to 40 meters；
The length of second oil pipe is 15 meters to 30 meters.
5. gas anchor according to claim 2, which is characterized in that the outer diameter of the screen casing is 73 millimeters, and internal diameter is 62 millimeters；
The outer diameter of the tail pipe is 73 millimeters, and internal diameter is 62 millimeters.
6. gas anchor according to claim 1, which is characterized in that the top connection is hollow tube body, and the top connection
One end inner wall it is stepped, be provided with screw thread on the stair-stepping inner wall；
One end of first oil pipe is threadedly coupled with the step in the stair-stepping inner wall；
One end of second oil pipe is threadedly coupled with the another step in the stair-stepping inner wall.
7. gas anchor according to any one of claims 1 to 6, which is characterized in that
The outer diameter of second oil pipe is 40 millimeters, and internal diameter is 32 millimeters；
Alternatively, 48 millimeters of the outer diameter of second oil pipe, internal diameter is 40 millimeters.
8. gas anchor according to any one of claims 1 to 6, which is characterized in that the diameter of each through-hole is 2 millimeters to 8
Millimeter.
9. gas anchor according to any one of claims 1 to 6, which is characterized in that the other end of the silk plug and second oil
The range of spacing between the other end of pipe is 5 meters to 20 meters.
10. gas anchor according to any one of claims 1 to 6, which is characterized in that the silk plug is starting taper silk plug, and the silk
The end face of the stifled other end is spherical surface.
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| CN201822009536.6U CN209483327U (en) | 2018-11-30 | 2018-11-30 | The gas anchor of coal bed gas well |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110566165A (en) * | 2019-10-30 | 2019-12-13 | 河南理工大学 | Large-curvature horizontal open hole shaft flexible sieve tube running device and running method |
| CN112576233A (en) * | 2020-12-08 | 2021-03-30 | 梅瀚文 | Gas-liquid-solid separation device in shaft and design method thereof |
| CN114151061A (en) * | 2021-12-13 | 2022-03-08 | 东营市福利德石油科技开发有限责任公司 | Coal-bed gas production coal dust prevention device |
-
2018
- 2018-11-30 CN CN201822009536.6U patent/CN209483327U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110566165A (en) * | 2019-10-30 | 2019-12-13 | 河南理工大学 | Large-curvature horizontal open hole shaft flexible sieve tube running device and running method |
| CN112576233A (en) * | 2020-12-08 | 2021-03-30 | 梅瀚文 | Gas-liquid-solid separation device in shaft and design method thereof |
| CN112576233B (en) * | 2020-12-08 | 2022-07-26 | 梅瀚文 | Gas-liquid-solid separation device in shaft and manufacturing method thereof |
| CN114151061A (en) * | 2021-12-13 | 2022-03-08 | 东营市福利德石油科技开发有限责任公司 | Coal-bed gas production coal dust prevention device |
| CN114151061B (en) * | 2021-12-13 | 2023-06-30 | 东营市福利德石油科技开发有限责任公司 | Coal dust prevention device for coal bed gas production |
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