CN115653543A - Oil well sand washing and well washing conversion device, oil well sand washing and well washing system and method - Google Patents
Oil well sand washing and well washing conversion device, oil well sand washing and well washing system and method Download PDFInfo
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- CN115653543A CN115653543A CN202211339946.1A CN202211339946A CN115653543A CN 115653543 A CN115653543 A CN 115653543A CN 202211339946 A CN202211339946 A CN 202211339946A CN 115653543 A CN115653543 A CN 115653543A
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- 238000005406 washing Methods 0.000 title claims abstract description 158
- 239000004576 sand Substances 0.000 title claims abstract description 95
- 239000003129 oil well Substances 0.000 title claims abstract description 84
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000011010 flushing procedure Methods 0.000 claims abstract description 103
- 239000010985 leather Substances 0.000 claims abstract description 49
- 239000012530 fluid Substances 0.000 claims abstract description 44
- 230000007246 mechanism Effects 0.000 claims abstract description 24
- 230000000903 blocking effect Effects 0.000 claims abstract description 21
- 239000000725 suspension Substances 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims description 48
- 239000012535 impurity Substances 0.000 claims description 9
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 238000000605 extraction Methods 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 8
- 238000000926 separation method Methods 0.000 description 7
- 238000011001 backwashing Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
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Abstract
The invention belongs to the technical field of oil extraction, and particularly relates to an oil well sand washing and well washing conversion device, an oil well sand washing and well washing system and an oil well sand washing and well washing method. The sand washing and well washing conversion device for the oil well is organically composed of an upper joint, a bridge type overflow pipe, a regulating sleeve, a central pipe, a pressing cap, a lower joint and a blocking mechanism; on the basis of the oil well sand washing and well washing conversion device, an oil well sand washing and well washing system is organically formed by a ground well washing vehicle, an oil sleeve annular joint, an oil pipe and an ejector. The invention injects the flushing fluid into the shaft through the oil sleeve annulus to the leather cup on the upper part of the oil well sand flushing and well flushing conversion device, the flushing fluid enters the inner channel of the oil well sand flushing and well flushing conversion device to reach the ejector due to the shielding of the leather cup, sand grains at the bottom of the well are flushed to a suspension state, and the backflow fluid returns to the ground through the oil pipe through the reverse circulation channel on the oil well sand flushing and well flushing conversion device. By adopting the technical scheme of the invention, a well head is not required to be inverted into a pipeline, and the purposes of positive flushing and reverse circulation are conveniently, quickly and efficiently realized.
Description
Technical Field
The invention belongs to the technical field of oil extraction, and particularly relates to an oil well sand washing and well washing conversion device, an oil well sand washing and well washing system and an oil well sand washing and well washing method.
Background
In the process of oil well operation, the sand washing and well washing operation is required to be frequently carried out on the oil well.
Normally, the pumping well is mostly operated by a positive flushing and back flushing method. In the process of forward flushing and backwashing, firstly, an oil pipe inlet and sleeve outlet mode is adopted, impurities such as sediment at the bottom of a well are suspended by utilizing the advantage of large forward flushing impact force, and then backwashing, namely the sleeve inlet and oil pipe outlet mode, is adopted, so that the characteristics of large backwashing discharge capacity ratio and strong sand carrying capacity are fully utilized, and the impurities in a shaft are flushed to the ground. However, in the prior art, the operation mode of sand washing and well washing of the oil well is adopted, so that the backwashing impact force is not strong, the forward washing sand carrying capacity is weak, the efficiency of sand washing and well washing of the oil well is low, and the sand washing and well washing operation under the state of no pump stopping cannot be realized.
Disclosure of Invention
The invention provides an oil well sand washing and well washing conversion device, an oil well sand washing and well washing system and an oil well sand washing and well washing method, aiming at the problems that in the operation mode of oil well sand washing and well washing in the prior art, the backwashing impact force is not strong, the forward washing sand carrying capacity is weak, and well washing and sand washing operation under the state of not stopping a pump cannot be realized.
In order to achieve the purpose, the invention adopts the technical scheme that:
a sand washing and well washing conversion device for an oil well comprises an upper joint, a bridge type overflow pipe, an adjusting sleeve, a central pipe, a pressing cap, a lower joint and a blocking mechanism; the bridge-type overflow pipe is provided with a channel for the passing of well-flushing liquid and a channel for the passing of backflow liquid, the periphery of the upper part of the bridge-type overflow pipe is sleeved with an adjusting sleeve, and the top of the bridge-type overflow pipe is flush with the top of the adjusting sleeve; the top of the adjusting sleeve is connected with the upper joint; the side walls of the bridge-type overflow pipe and the adjusting sleeve below the upper joint are correspondingly provided with a well-flushing liquid inlet which is only communicated with the center of the bridge-type overflow pipe, the periphery of the adjusting sleeve below the well-flushing liquid inlet is connected with a blocking mechanism, and the lower end of the blocking mechanism is tightly pressed and connected on the adjusting sleeve through a pressing cap; the lower end of the bridge type overflow pipe is connected with a lower joint.
The blocking mechanism comprises an upper leather cup, a central pipe and a lower leather cup; the upper leather cup is connected to the periphery of the adjusting sleeve below the well washing liquid inlet, the periphery of the adjusting sleeve at the lower part of the upper leather cup is sleeved with the central pipe, and the periphery of the lower part of the central pipe is connected with the lower leather cup; the lower part of the lower leather cup is connected with a pressing cap.
The bridge type overflow pipe is composed of an inner layer of pipe and an outer layer of pipe; the top end of the inner layer tube is closed, and the bottom end is open; the bottom end of the outer layer tube is open, and the top end is provided with a through hole; the center of the inner layer pipe is a central channel through which the flushing fluid passes, and a reverse circulation channel for the reverse flow fluid to pass is formed between the inner layer pipe and the outer layer pipe; the side wall of the upper part of the bridge-type overflow pipe is provided with a well-flushing liquid inlet which is only communicated with the central channel; the top of the bridge-type overflow pipe is provided with a through hole for reverse circulation liquid to pass through.
The outer diameter of the upper part of the bridge type overflow pipe is the same as that of the lower part of the bridge type overflow pipe, and the outer diameter of the middle part of the bridge type overflow pipe is smaller than that of the upper part of the bridge type overflow pipe; and the well-flushing liquid inlet is arranged at the upper part of the bridge-type overflow pipe.
The adjusting sleeve is an integrated structure formed by two sections of hollow pipes with the same inner diameter and different outer diameters; the inner diameter of the adjusting sleeve is matched with the outer diameter of the bridge type overflowing pipe; the outer diameter of the upper section of the adjusting sleeve is larger than that of the lower section; the upper end and the lower end of the adjusting sleeve are both open; the bottom end of the upper leather cup arranged on the side wall of the middle upper part of the upper section of the adjusting sleeve is connected with the joint of the upper section and the lower section.
And the lower part of the upper joint and the upper part of the lower joint are provided with threads which are respectively matched with the bridge type overflow pipe and the adjusting sleeve.
An oil well sand washing and well washing system at least comprises an oil well sand washing and well washing conversion device, a ground well washing vehicle, an oil sleeve annular joint, an oil pipe, an ejector and a ground liquid tank; the ground well-flushing truck is communicated with the shaft annulus through an oil sleeve annulus joint; the ground liquid tank, the oil pipe, the oil well sand washing and well washing conversion device and the ejector are sequentially connected from top to bottom; the oil pipe is communicated with a reverse circulation channel for reverse flow liquid to pass through on a bridge type overflow pipe in the oil well sand washing and well washing conversion device, and the ejector is communicated with a central channel for well washing liquid to pass through on the bridge type overflow pipe in the oil well sand washing and well washing conversion device.
A sand washing and well washing method of an oil well sand washing and well washing system comprises the following steps,
the method comprises the following steps: connecting the oil sleeve annular joint with a ground well-flushing truck, and sequentially connecting a ground liquid tank, an oil pipe, an oil well sand-flushing well-flushing conversion device and an ejector from top to bottom;
step two: sequentially putting the jet device, the oil well sand washing and well washing conversion device and the oil pipe into the shaft, and enabling an upper leather cup and a lower leather cup on a blocking mechanism in the oil well sand washing and well washing conversion device to be in close contact with the shaft;
step three: the ground well-flushing vehicle pumps the well-flushing fluid into the shaft through the oil sleeve annulus by the oil sleeve annulus joint;
step four: the flushing fluid reaches the upper leather cup on the sand washing and well washing conversion device of the oil well, enters the central channel through the flushing fluid inlet and reaches the ejector, the ejector flushes impurities such as sand particles at the bottom of the well to a suspension state, and the flushing fluid returns out of the ground through the reverse circulation channel in the bridge-type flow passing pipe and enters the ground fluid tank through the oil pipe.
Has the advantages that:
(1) The oil well sand washing and well washing conversion device is organically composed of an upper joint, a bridge type overflow pipe, a regulating sleeve, a central pipe, a pressing cap, a lower joint and a blocking mechanism; on the basis of the oil well sand washing and well washing conversion device, an oil well sand washing and well washing system is organically formed by a ground well washing vehicle, an oil sleeve annular joint, an oil pipe and an ejector. The invention injects the flushing fluid into the shaft through the oil sleeve annulus to the leather cup at the upper part of the oil well sand washing conversion device, the flushing fluid enters the internal channel of the oil well sand washing conversion device to reach the ejector due to the shielding of the leather cup, sand grains at the bottom of the well are flushed to a suspension state, and the backflow fluid returns out of the ground through the oil pipe through the reverse circulation channel on the oil well sand washing conversion device.
(2) By adopting the technical scheme of the invention, a wellhead pipeline does not need to be inverted, and the purposes of forward flushing and reverse circulation are conveniently, quickly and efficiently realized.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to clearly understand the technical solutions of the present invention and to implement the technical solutions according to the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required in the embodiments will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of the construction of the oil well sand washing system of the present invention.
Fig. 2 is a schematic structural diagram of the oil well sand washing and well washing conversion device.
Fig. 3 isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A of fig. 2.
Fig. 4 is a cross-sectional view of an adjustment sleeve according to the present invention.
Fig. 5 is a cross-sectional view of a bridge type flow tube of the present invention.
In the figure: 1. an upper joint; 2. a bridge type overflow pipe; 3. an adjusting sleeve; 4. a well flushing fluid inlet; 5. coating a leather cup; 6. a central tube; 7. a leather cup is arranged; 8. pressing the cap; 9. a central channel; 10. a lower joint; 11. a ground well-flushing vehicle; 12. an oil jacket annulus joint; 13. an oil pipe; 14. a sand washing and well washing conversion device for the oil well; 15. an ejector; 16. a reverse circulation channel; 17. a ground liquid tank.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
the oil well sand washing and well washing conversion device shown in the figure 2 comprises an upper joint 1, a bridge type overflow pipe 2, a regulating sleeve 3, a central pipe 6, a press cap 8, a lower joint 10 and a blocking mechanism; the bridge-type overflow pipe 2 is provided with a channel for the passing of flushing liquid and a channel for the passing of backflow liquid, the periphery of the upper part of the bridge-type overflow pipe 2 is sleeved with the adjusting sleeve 3, and the top of the bridge-type overflow pipe 2 is flush with the top of the adjusting sleeve 3; the top of the adjusting sleeve 3 is connected with the upper joint 1; the side walls of the bridge-type overflow pipe 2 and the adjusting sleeve 3 below the upper joint 1 are correspondingly provided with a well-flushing liquid inlet 4 which is only communicated with the center of the bridge-type overflow pipe 2, the periphery of the adjusting sleeve 3 below the well-flushing liquid inlet 4 is connected with a blocking mechanism, and the lower end of the blocking mechanism is tightly pressed and connected on the adjusting sleeve 3 through a pressing cap 8; the lower end of the bridge type overflow pipe 2 is connected with a lower joint 10.
In actual use, the adjusting sleeve 3 is used for adjusting the position of the blocking mechanism.
When the method is applied specifically, firstly, the oil sleeve annular joint 12 is connected with a ground well-flushing truck 11, and a ground liquid tank 17, an oil pipe 13, an oil well sand-flushing well-flushing conversion device 14 and an ejector 15 are sequentially connected from top to bottom; then, the jet device 15, the oil well sand washing conversion device 14 and the oil pipe 13 are put into the shaft in sequence, and the upper leather cup 5 and the lower leather cup 7 on the separation mechanism in the oil well sand washing conversion device 14 are in close contact with the shaft, so that the shaft is separated up and down. When the sand washing and well washing of the oil well are started, a ground well washing vehicle 11 injects well washing liquid into the annular space between a shaft and an oil pipe 13 through an oil sleeve annular joint 12, the well washing liquid reaches a blocking mechanism, due to the blocking of the blocking mechanism, the well washing liquid enters the center of the bridge type overflowing pipe 2 through a well washing liquid inlet 4 and reaches an ejector 15, the ejector 15 washes impurities such as sand grains at the bottom of the well to a suspension state, and the well washing liquid returns to the ground through an anti-circulation channel 16 in the bridge type overflowing pipe 2 through the oil pipe 13 and enters a ground liquid tank 17.
By adopting the technical scheme of the invention, a wellhead reverse pipeline is not needed, the forward flushing and the reverse flushing are conveniently realized, the impact force is strong, and the sand carrying capacity is strong.
The second embodiment:
according to the oil well sand washing well-flushing conversion device shown in fig. 2, the difference from the first embodiment is that: the blocking mechanism comprises an upper leather cup 5, a central pipe 6 and a lower leather cup 7; the upper leather bowl 5 is connected to the periphery of the adjusting sleeve 3 below the flushing fluid inlet 4, the periphery of the adjusting sleeve 3 at the lower part of the upper leather bowl 5 is sleeved with a central pipe 6, and the periphery of the lower part of the central pipe 6 is connected with a lower leather bowl 7; a pressing cap 8 is connected below the lower leather cup 7.
When the actual use, this technical scheme is adopted to separation mechanism, and after going into the pit shaft under oil well sand washing well-flushing conversion equipment, epithelial bowl 5 and lower epithelial bowl 7 and pit shaft inner wall in close contact with separate the upper and lower separation of hindering of pit shaft, are convenient for wash solution and palirrhea liquid and get into the shaft bottom or palirrhea to ground through different passageways. The sand washing and well washing operation of the oil well can be completed quickly and efficiently.
Example three:
according to the oil well sand washing well switching device shown in the figures 2, 3 and 5, the difference from the first embodiment is that: the bridge-type overflow pipe 2 consists of an inner layer of pipe and an outer layer of pipe; the top end of the inner layer tube is closed, and the bottom end is open; the bottom end of the outer layer tube is open, and the top end is provided with a through hole; the center of the inner layer pipe is a central channel 9 through which the flushing liquid passes, and a reverse circulation channel 16 for the reverse flow liquid to pass is formed between the inner layer pipe and the outer layer pipe; the side wall of the upper part of the bridge type overflow pipe 2 is provided with a well-flushing liquid inlet 4 which is only communicated with the central channel 9; the top of the bridge type overflow pipe 2 is provided with a through hole for reverse circulation liquid to pass through.
When in actual use, the bridge type overflow pipe 2 adopts the technical scheme, after a ground well-flushing vehicle 11 injects a well-flushing fluid into a shaft through an oil sleeve annulus by an oil sleeve annulus joint 12, the well-flushing fluid reaches an upper leather cup 5 on an oil well sand-flushing well-flushing conversion device 14; due to the blocking of a leather cup, the flushing fluid enters the central channel 9 through the flushing fluid inlet 4 and reaches the ejector 15, the ejector 15 washes impurities such as sand grains at the bottom of the well to a suspension state, and the flushing fluid returns to the ground through the reverse circulation channel 16 in the bridge type overflow pipe 2 through the oil pipe 13 and enters the ground fluid tank 17; the forward flushing and back flushing are conveniently and uninterruptedly carried out, the impact force is strong, and the sand carrying capacity is strong.
Example four:
according to the oil well sand washing well switching device shown in the figures 2, 3 and 5, the difference from the first embodiment or the third embodiment is that: the outer diameter of the upper part of the bridge type overflow pipe 2 is the same as that of the lower part, and the outer diameter of the middle part is smaller than that of the upper part; and the well-flushing liquid inlet 4 is arranged at the upper part of the bridge type overflow pipe 2.
In practice the flushing fluid inlet 4 is only in communication with the central channel 9 in the bridge flow pipe 2.
By adopting the technical scheme, the invention not only can realize the connection between the sand washing and well washing conversion device and related components, but also can ensure that the sand washing and well washing conversion device of the oil well stably works.
Example five:
according to the oil well sand washing well switching device shown in fig. 2 and 4, the difference from the first embodiment is that: the adjusting sleeve 3 is an integrated structure formed by two sections of hollow pipes with the same inner diameter and different outer diameters; the inner diameter of the adjusting sleeve 3 is matched with the outer diameter of the bridge type overflow pipe 2; the outer diameter of the upper section of the adjusting sleeve 3 is larger than that of the lower section; the upper end and the lower end of the adjusting sleeve 3 are both open; the bottom end of the upper leather bowl 5 arranged on the side wall of the middle upper part of the upper section of the adjusting sleeve 3 is connected with the joint of the upper section and the lower section.
When in actual use, adjusting sleeve 3 adopts this technical scheme, can be convenient, stable connect upper leather cup and lower leather cup in top connection 1 and the separation mechanism to make leather cup and lower leather cup and pit shaft inside wall zonulae occludens, the effect of its separation pit shaft of better realization, thereby guarantee the realization of just dashing, backwash, and have great impact force intensity and stronger sand carrying ability when guaranteeing to wash.
Example six:
according to the oil well sand washing well-flushing conversion device shown in fig. 2, the difference from the first embodiment is that: and the lower part of the upper joint 1 and the upper part of the lower joint 10 are provided with threads which are respectively matched with the bridge type overflow pipe 2 and the adjusting sleeve 3.
In actual use, the upper joint 1 and the lower joint 10 adopt the technical scheme, so that the components can be conveniently connected and detached, and the components can be conveniently replaced.
Example seven:
1-5, further comprising a surface well-flushing truck 11, an oil casing annulus joint 12, an oil pipe 13, an ejector 15 and a surface liquid tank 17; the ground well-flushing truck 11 is communicated with the shaft annulus through an oil casing annulus joint 12; the ground liquid tank 17, the oil pipe 13, the oil well sand washing and well washing conversion device 14 and the ejector 15 are connected from top to bottom in sequence; the oil pipe 13 is communicated with a reverse circulation channel 16 used for reverse flow liquid to pass through on the bridge type overflow pipe 2 in the oil well sand washing and well washing conversion device, and the ejector 15 is communicated with a central channel 9 used for well washing liquid to pass through on the bridge type overflow pipe 2 in the oil well sand washing and well washing conversion device.
In actual use, firstly, the oil sleeve annular joint 12 is connected with a ground well-flushing truck 11, and a ground liquid tank 17, an oil pipe 13, an oil well sand-flushing well-flushing conversion device 14 and an ejector 15 are sequentially connected from top to bottom; then, the ejector 15, the oil well sand washing and well washing conversion device 14 and the oil pipe 13 are put into the shaft in sequence, and the upper leather cup 5 and the lower leather cup 7 on the separation mechanism in the oil well sand washing and well washing conversion device 14 are in close contact with the shaft; then, a ground well flushing truck 11 injects well flushing fluid into a shaft through an oil sleeve annulus by an oil sleeve annulus joint 12; when the flushing fluid reaches the upper leather cup 5 on the oil well sand-washing and well-washing conversion device 14, the flushing fluid enters the central channel 9 through the flushing fluid inlet 4 and reaches the ejector 15, the ejector 15 washes impurities such as sand grains at the well bottom to a suspension state, the flushing fluid returns out of the ground through the reverse circulation channel 16 in the bridge type overflow pipe 2 through the oil pipe 13 and enters the ground fluid tank 17, and the purposes of forward flushing and reverse circulation of sand-washing and well-washing of the oil well are conveniently, quickly and efficiently achieved.
The ejector 15 in this embodiment is a slant tip ejector or a rotary ejector.
Example eight:
a sand washing and well washing method of an oil well sand washing and well washing system comprises the following steps,
the method comprises the following steps: connecting an oil sleeve annular joint 12 with a ground well-flushing truck 11, and sequentially connecting a ground liquid tank 17, an oil pipe 13, an oil well sand-flushing well-flushing conversion device 14 and an ejector 15 from top to bottom;
step two: the jet device 15, the oil well sand washing and well washing conversion device 14 and the oil pipe 13 are put into the shaft in sequence, and the upper leather cup 5 and the lower leather cup 7 on the separation mechanism in the oil well sand washing and well washing conversion device 14 are in close contact with the shaft;
step three: the ground well-flushing vehicle 11 injects the well-flushing fluid into the shaft through the oil sleeve annulus by the oil sleeve annulus joint 12;
step four: the flushing fluid reaches the upper leather cup 5 on the sand washing and well washing conversion device 14 of the oil well, enters the central channel 9 through the flushing fluid inlet 4 and reaches the ejector 15, the ejector 15 washes impurities such as sand grains at the well bottom to a suspension state, and the flushing fluid returns to the ground through the reverse circulation channel 16 in the bridge type overflow pipe 2 through the oil pipe 13 and enters the ground fluid tank 17.
When the device is in actual use, the ground well-flushing vehicle pumps well-flushing fluid into a shaft through an oil sleeve annulus joint 12 and reaches an upper leather cup, and due to the shielding effect of the leather cup, the well-flushing fluid enters a central channel 9 in the sand-flushing well-flushing conversion device of the oil well and reaches an ejector 15, and then impurities such as sand grains at the bottom of the well are flushed to a suspension state. Because the pressure of the cleaning solution passing through the jet device 15 is larger, the mixed solution in a suspension state can only return to the ground through the reverse circulation channel 16 in the oil well sand washing and well washing conversion device and the oil pipe 13, and the purposes of forward flushing and reverse circulation are better realized.
In the case of no conflict, a person skilled in the art may combine the related technical features in the above examples according to actual situations to achieve corresponding technical effects, and details of various combining situations are not described herein.
It should be noted that all directional indicators (such as up, down, left, right, front, and back \8230;) in the embodiments of the present invention are only used to explain the relative positional relationship between the components, the motion situation, etc. in a specific posture (as shown in the attached drawings), and if the specific posture is changed, the directional indicators are changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
Thus, while the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Any simple modification, equivalent change and modification of the above embodiments according to the technical spirit of the present invention still fall within the scope of the technical solution of the present invention.
Claims (8)
1. The utility model provides an oil well sand washing well conversion equipment which characterized in that: comprises an upper joint (1), a bridge type overflowing pipe (2), an adjusting sleeve (3), a central pipe (6), a pressing cap (8), a lower joint (10) and a blocking mechanism; the bridge-type overflow pipe (2) is provided with a channel for the passing of well-flushing liquid and a channel for the passing of reverse flow liquid, the periphery of the upper part of the bridge-type overflow pipe (2) is sleeved with an adjusting sleeve (3), and the top of the bridge-type overflow pipe (2) is flush with the top of the adjusting sleeve (3); the top of the adjusting sleeve (3) is connected with the upper joint (1); the side walls of the bridge-type overflow pipe (2) and the adjusting sleeve (3) below the upper joint (1) are correspondingly provided with a well-flushing liquid inlet (4) which is only communicated with the center of the bridge-type overflow pipe (2), the periphery of the adjusting sleeve (3) below the well-flushing liquid inlet (4) is connected with a blocking mechanism, and the lower end of the blocking mechanism is tightly pressed and connected on the adjusting sleeve (3) through a pressing cap (8); the lower end of the bridge type overflow pipe (2) is connected with a lower joint (10).
2. The well-flushing conversion device of claim 1, wherein: the blocking mechanism comprises an upper leather cup (5), a central pipe (6) and a lower leather cup (7); the upper leather bowl (5) is connected to the periphery of the adjusting sleeve (3) below the flushing fluid inlet (4), the periphery of the adjusting sleeve (3) at the lower part of the upper leather bowl (5) is sleeved with the central pipe (6), and the periphery of the lower part of the central pipe (6) is connected with the lower leather bowl (7); a pressing cap (8) is connected below the lower leather cup (7).
3. The well-flushing conversion device of claim 1, wherein: the bridge type overflow pipe (2) is composed of an inner layer of pipe and an outer layer of pipe; the top end of the inner layer tube is closed, and the bottom end of the inner layer tube is open; the bottom end of the outer layer tube is open, and the top end is provided with a through hole; the center of the inner layer pipe is a central channel (9) through which the flushing fluid passes, and a reverse circulation channel (16) through which the reverse flow fluid passes is formed between the inner layer pipe and the outer layer pipe; the side wall of the upper part of the bridge type overflow pipe (2) is provided with a well-flushing liquid inlet (4) which is only communicated with the central channel (9); the top of the bridge type overflow pipe (2) is provided with a through hole for the reverse circulation liquid to pass through.
4. A well-flushing conversion device as claimed in claim 1 or 3, wherein: the outer diameter of the upper part of the outer diameter of the bridge type overflow pipe (2) is the same as that of the lower part of the outer diameter of the bridge type overflow pipe, and the outer diameter of the middle part of the outer diameter of the bridge type overflow pipe is smaller than that of the upper part of the bridge type overflow pipe; and the well-flushing liquid inlet (4) is arranged at the upper part of the bridge-type overflow pipe (2).
5. The well-flushing conversion device of claim 1, wherein: the adjusting sleeve (3) is an integrated structure formed by two sections of hollow pipes with the same inner diameter and different outer diameters; the inner diameter of the adjusting sleeve (3) is matched with the outer diameter of the bridge type overflow pipe (2); the outer diameter of the upper section of the adjusting sleeve (3) is larger than that of the lower section; the upper end and the lower end of the adjusting sleeve (3) are both open; the bottom end of the upper leather bowl (5) arranged on the side wall of the middle upper part of the upper section of the adjusting sleeve (3) is connected with the joint of the upper section and the lower section.
6. The well-flushing conversion device of claim 1, wherein: and the lower part of the upper joint (1) and the upper part of the lower joint (10) are provided with threads which are respectively matched with the bridge type overflow pipe (2) and the adjusting sleeve (3).
7. The utility model provides an oil well sand washing well system which characterized in that: at least comprising the oil well sand wash and well clean conversion device (14) according to any of the claims 1-6, further comprising a surface well wash truck (11), an oil casing annulus joint (12), an oil pipe (13), an ejector (15) and a surface fluid tank (17); the ground well-flushing vehicle (11) is communicated with the shaft annulus through an oil casing annulus joint (12); the ground liquid tank (17), the oil pipe (13), the oil well sand washing and well washing conversion device (14) and the ejector (15) are sequentially connected from top to bottom; the oil pipe (13) is communicated with a reverse circulation channel (16) for passing through reverse flow liquid on the bridge type overflow pipe (2) in the oil well sand washing and well washing conversion device, and the ejector (15) is communicated with a central channel (9) for passing through well washing liquid on the bridge type overflow pipe (2) in the oil well sand washing and well washing conversion device.
8. The sand washing method of an oil well sand washing system as claimed in claim 7, wherein: comprises the following steps of (a) carrying out,
the method comprises the following steps: connecting an oil sleeve annular joint (12) with a ground well washing vehicle (11), and sequentially connecting a ground liquid tank (17), an oil pipe (13), an oil well sand washing and well washing conversion device (14) and an ejector (15) from top to bottom;
step two: sequentially putting the ejector (15), the oil well sand washing and well washing conversion device (14) and the oil pipe (13) into the shaft, and enabling an upper leather cup (5) and a lower leather cup (7) on a blocking mechanism in the oil well sand washing and well washing conversion device (14) to be in close contact with the shaft;
step three: a ground well flushing vehicle (11) injects well flushing fluid into a shaft through an oil sleeve annulus joint (12);
step four: the flushing fluid reaches an upper leather cup (5) on the sand-washing and well-washing conversion device (14) of the oil well, enters the inside of the central channel (9) through the flushing fluid inlet (4) and reaches the ejector (15), the ejector (15) washes impurities such as sand grains at the bottom of the well to a suspension state, and the flushing fluid returns out of the ground through the oil pipe (13) through the reverse circulation channel (16) in the bridge-type overflow pipe (2) and enters the ground fluid tank (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211339946.1A CN115653543A (en) | 2022-10-27 | 2022-10-27 | Oil well sand washing and well washing conversion device, oil well sand washing and well washing system and method |
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| CN202211339946.1A CN115653543A (en) | 2022-10-27 | 2022-10-27 | Oil well sand washing and well washing conversion device, oil well sand washing and well washing system and method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2512905Y (en) * | 2001-11-29 | 2002-09-25 | 刘宪庆 | Leak-proof well flushing device for oil pumping well |
| US20070062690A1 (en) * | 2005-09-16 | 2007-03-22 | Witcher Harold L | Packer washout assembly |
| RU2405914C1 (en) * | 2009-09-07 | 2010-12-10 | Общество с ограниченной ответственностью Научно-производственная фирма "Пакер" | Method and device for well flushing |
| CN202970550U (en) * | 2012-11-02 | 2013-06-05 | 中国石油化工股份有限公司 | Rotational-flow sand washing and deblocking pipe column for horizontal well |
| CN105464616A (en) * | 2016-01-06 | 2016-04-06 | 冯俊杰 | Well-washing environment-friendly double-cup packer |
| CN111075373A (en) * | 2018-10-22 | 2020-04-28 | 中国石油化工股份有限公司 | Continuous sand washing well-flushing tool and method |
-
2022
- 2022-10-27 CN CN202211339946.1A patent/CN115653543A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2512905Y (en) * | 2001-11-29 | 2002-09-25 | 刘宪庆 | Leak-proof well flushing device for oil pumping well |
| US20070062690A1 (en) * | 2005-09-16 | 2007-03-22 | Witcher Harold L | Packer washout assembly |
| RU2405914C1 (en) * | 2009-09-07 | 2010-12-10 | Общество с ограниченной ответственностью Научно-производственная фирма "Пакер" | Method and device for well flushing |
| CN202970550U (en) * | 2012-11-02 | 2013-06-05 | 中国石油化工股份有限公司 | Rotational-flow sand washing and deblocking pipe column for horizontal well |
| CN105464616A (en) * | 2016-01-06 | 2016-04-06 | 冯俊杰 | Well-washing environment-friendly double-cup packer |
| CN111075373A (en) * | 2018-10-22 | 2020-04-28 | 中国石油化工股份有限公司 | Continuous sand washing well-flushing tool and method |
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