CN215169845U - Nitrogen foam ground reversing continuous sand washing system - Google Patents
Nitrogen foam ground reversing continuous sand washing system Download PDFInfo
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- CN215169845U CN215169845U CN202121176063.4U CN202121176063U CN215169845U CN 215169845 U CN215169845 U CN 215169845U CN 202121176063 U CN202121176063 U CN 202121176063U CN 215169845 U CN215169845 U CN 215169845U
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Abstract
The utility model discloses a nitrogen foam ground reversing continuous sand washing system, which comprises an oil field sand washing unit and a circulating supply unit; the oil field sand washing unit comprises a four-way connecting frame, a high-pressure self-sealing blowout preventer, an oil pipe and a circulating short section; a first one-way valve is installed at an opening at the top of the circulating short section, and a second one-way valve is installed at an opening on the side wall of the circulating short section; the circulating supply unit comprises a circulating sand washing tank, sand washing equipment, reversing equipment and sand removing equipment; the utility model adds the circulation short section on the basis of the conventional sand washing structure, can realize the reversing circulation sand washing of the top and the side part, and still keep the continuous circulation of the sand washing liquid in the well when the sand washing is changed into a single piece, thereby avoiding the problems of sand blocking accidents and low sand washing efficiency caused by the cut-off of the sand washing liquid; the sand removing device can effectively remove formation sand carried by the sand washing liquid, the sand washing liquid can be recycled, the structure is simple, safe and reliable, the sand washing construction efficiency is greatly improved, the operation labor intensity is reduced, and an oil-gas layer is protected from being polluted.
Description
Technical Field
The utility model relates to an oil field development technical field, more specifically the reversing continuous sand washing system on nitrogen gas foam ground that says so relates to.
Background
As the development of the oil field enters the middle and later stages, the sand production of the oil well is serious, the yield of the oil well is directly influenced, and the sand production seriously leads to the scrapping of the oil well. The sand washing is a measure generally adopted by each large oil field aiming at the problem of sand setting in the well, the adopted sand washing media mainly comprise slurry and water, for a low-pressure well, liquid is leaked to the stratum due to the fact that the liquid-liquid column pressure is larger than the stratum pressure, so that the sand washing efficiency is low or sand setting and drilling clamping occur, the stratum pollution can be caused due to the fact that the liquid is not compatible with the stratum, in addition, the sand washing is easy to cause the sand setting and drilling clamping under the condition of low discharge capacity due to the fact that the viscosity of the water is low and the sand carrying capacity is weak; in addition, when a single sand washing pipe column (or a vertical column) is connected with sand washing, the pressure release time of about 20 minutes is needed, and the continuity of the operation is affected.
Therefore, how to provide a sand washing system which can improve the sand washing efficiency and avoid sand blocking sand washing pipe column accidents is a problem that needs to be solved urgently by technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a nitrogen gas foam ground switching-over is sand washing system in succession aims at solving above-mentioned technical problem.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a nitrogen foam ground reversing continuous sand washing system comprises an oil field sand washing unit and a circulating supply unit;
the oil field sand washing unit comprises a four-way connecting frame, a high-pressure self-sealing blowout preventer, an oil pipe and a circulating short section; the four-way connecting frame is arranged at a wellhead; the high-pressure self-sealing blowout preventer is arranged at the top of the four-way connecting frame; the oil pipe penetrates through the four-way connecting frame and the high-pressure self-sealing blowout preventer to enter the well; the circulating short section is connected to the top end of the oil pipe; a first one-way valve is installed at an opening at the top of the circulating short section, a second one-way valve is installed at an opening on the side wall, and an opening at the bottom of the circulating short section is communicated with the oil pipe;
the circulating supply unit comprises a circulating sand washing tank, sand washing equipment, reversing equipment and sand removing equipment; the circulating sand washing tank is filled with nitrogen foam sand washing liquid; the liquid pumping port of the sand washing equipment is communicated with the circulating sand washing tank; the reversing equipment is provided with two liquid inlets and two liquid outlets; the two liquid inlets are respectively communicated with an outlet of the sand washing equipment; the two liquid outlets are respectively communicated with the top opening and the side wall opening of the circulating short section; the inlet of the sand removing equipment is communicated with the side outlet of the four-way connecting frame, and the outlet of the sand removing equipment is communicated with the circulating sand washing tank.
Through the technical scheme, the utility model is additionally provided with the circulating short joint on the basis of the conventional sand washing structure, thereby realizing the reversing circulating sand washing of the top part and the side part, and still keeping the continuous circulation of the sand washing liquid in the well when the sand washing liquid changes single, thereby avoiding the problems of sand blocking accident and low sand washing efficiency caused by the cut-off of the sand washing liquid; the sand removing device can effectively remove formation sand carried by the sand washing liquid, the sand washing liquid can be recycled, the structure is simple, safe and reliable, the sand washing construction efficiency is greatly improved, the operation labor intensity is reduced, and an oil-gas layer is protected from being polluted.
Preferably, in the nitrogen foam ground reversing continuous sand washing system, the liquid outlet is provided with a branched pressure relief opening. Can effectively play the role of pressure relief.
Preferably, in the above-mentioned nitrogen gas foam ground switching-over continuous sand washing system, plug valves are all installed on the liquid inlet, the liquid outlet and the pressure relief opening. The liquid inlet reversing is convenient to control.
Preferably, in the nitrogen foam ground reversing continuous sand washing system, the sand washing equipment is a high-pressure pump. The supply of the nitrogen foam sand washing liquid can be realized.
Preferably, in the nitrogen foam ground reversing continuous sand washing system, the sand removing equipment comprises a sand washing circulating water tank and a vibrating screen. Can meet the requirement of sand removal.
Preferably, in the above-mentioned nitrogen foam ground switching-over continuous sand washing system, the shale shaker includes bumper shock absorber, exciting motor, sieve case angle adjustment mechanism, screen cloth fixed establishment and base. The utility model provides a shale shaker realizes the vibration for traditional conventional structure through excitation motor, for current conventional technology, no longer gives unnecessary details here.
Preferably, in the nitrogen foam ground reversing continuous sand washing system, the length of the circulation nipple is 290mm, and the maximum outer diameter is 108 mm. Can meet the use requirement.
Can know via foretell technical scheme, compare with prior art, the utility model discloses a nitrogen gas foam ground switching-over is sand washing system in succession has following beneficial effect:
1. the utility model discloses to sand washing discontinuity in the conventional sand washing work progress lead to sand card and sand washing construction cycle length scheduling problem, provide high-efficient pollution-free nitrogen gas foam ground switching-over sand washing technique, this technique has realized incessantly pumping sand washing and sand washing liquid recycling through circulation nipple joint, high pressure self-sealing blowout preventer, switching-over equipment, sand removal equipment etc. has effectively solved sand card, sand washing time length, sand washing ground pollution scheduling problem. Greatly improves the sand washing construction efficiency, lightens the labor intensity of operation and protects the oil-gas layer from being polluted.
2. The utility model discloses simple structure, safe and reliable adopt conventional operation mode, guarantee that the normal pump that does not stop is continuous circulation in the pit when workover especially horizontal well sand washing connects down single.
3. The utility model provides high sand washing efficiency more than 20%, avoid sand card sand washing tubular column accident again, reduce the sand washing liquid quantity, prevented wasting of resources and environmental pollution effectively.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a frame diagram of a nitrogen foam ground reversing continuous sand washing system provided by the present invention;
fig. 2 is a sectional view of the circulation nipple provided by the present invention;
fig. 3 is a schematic structural diagram of the reversing device provided by the present invention.
Wherein:
1-oil field sand washing unit;
11-four-way connection frame; 12-high pressure self-sealing well sealer; 13-oil pipe; 14-a cyclic nipple; 141-a first one-way valve; 142-a second one-way valve;
2-a circulation supply unit;
21-circulating sand washing tank; 22-sand washing equipment; 23-a reversing device; 231-a liquid inlet; 232-a liquid outlet;
233-pressure relief port; 234-plug valve; and 24-sand removing equipment.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to the attached drawings 1 to 3, the embodiment of the utility model discloses a nitrogen foam ground reversing continuous sand washing system, which comprises an oil field sand washing unit 1 and a circulating supply unit 2;
the oilfield sand washing unit 1 comprises a four-way connecting frame 11, a high-pressure self-sealing blowout preventer 12, an oil pipe 13 and a circulating nipple 14; the four-way connecting frame 11 is arranged at a wellhead; the high-pressure self-sealing blowout preventer 12 is arranged at the top of the four-way connecting frame 11; the oil pipe 13 passes through the four-way connecting frame 11 and the high-pressure self-sealing blowout preventer 12 and enters the well; the circulation nipple 14 is connected to the top end of the oil pipe 13; a first one-way valve 141 is arranged at the top opening of the circulation nipple 14, a second one-way valve 142 is arranged at the side wall opening, and the bottom opening is communicated with the oil pipe 13;
the circulating supply unit 2 comprises a circulating sand washing tank 21, a sand washing device 22, a reversing device 23 and a sand removing device 24; the circulating sand washing tank 21 is filled with nitrogen foam sand washing liquid; the liquid pumping port of the sand washing equipment 22 is communicated with the circulating sand washing tank 21; the reversing device 23 has two liquid inlets 231 and two liquid outlets 232; the two liquid inlets 231 are respectively communicated with the outlet of the sand washing equipment 22; the two liquid outlets 232 are respectively communicated with the top opening and the side wall opening of the circulation nipple 14; the inlet of the desanding device 24 is communicated with the side outlet of the four-way connecting frame 11, and the outlet of the desanding device 24 is communicated with the circulating sand flushing tank 21.
In order to further optimize the above solution, the liquid outlet 232 has a branched pressure relief opening 233.
In order to further optimize the above technical solution, the liquid inlet 231, the liquid outlet 232 and the pressure relief opening 233 are all provided with a plug valve 234.
In order to further optimize the above technical solution, the sand washing device 22 is a high pressure pump.
In order to further optimize the above technical solution, the sand removing device 24 comprises a sand washing circulation water tank and a vibrating screen.
In order to further optimize the technical scheme, the vibrating screen comprises a shock absorber, an excitation motor, a screen box angle adjusting mechanism, a screen fixing mechanism and a base.
In order to further optimize the technical scheme, the length of the circulating nipple 14 is 290mm, and the maximum outer diameter is 108 mm.
The utility model discloses a theory of operation does:
before sand washing construction, an oil pipe 13 is connected to a sand detecting surface, the oil pipe is lifted up by 1 twenty meters (a horizontal well is lifted to a straight well section) to prepare sand washing, a circulation short section 14 is additionally arranged at the top end of each oil pipe 13 according to the depth of a pipe column needing sand washing, and a well mouth is used as a high-pressure self-sealing blowout preventer 12.
During positive sand flushing operation, sand flushing liquid enters the top end of the circulating nipple 14 through the reversing equipment 23, flushes the first one-way valve and enters the oil pipe 13 to perform positive sand flushing operation; when the oil pipe 13 reaches a preset position and needs to be jointed, the circulating short section 14 is seated on the high-pressure self-sealing blowout preventer 12 by using a lifting clamp, the sand flushing hole on the side wall of the circulating short section 14 is connected, the plug valve 234 of the side sand flushing channel is firmly fixed and opened, and the plug valve 234 of the top inlet is closed. At this time, the second check valve 142 of the side wall fluid channel of the circulation nipple 14 is opened, the sand washing fluid enters the oil pipe 13 for sand washing operation, and the wellhead can be subjected to single joint operation.
After the single joint is connected, sand washing operation is carried out again through the reversing device 23 and the circulating short joint 14 to the bottom of the artificial well, and operation without stopping the device is achieved.
The utility model has the main advantages that:
1. the sand washing operation effect is improved, the production period of an oil well is prolonged, and the yield of crude oil is increased;
2. the pump is not stopped in the sand washing process, so that the sand setting and pipe clamping accidents caused by the replacement of a single pump and the stoppage of the pump are effectively avoided, and the operation of processing sand clamps and overhauling and releasing the clamps is reduced;
3. by adopting the sand washing technology, the construction efficiency is averagely improved by 20 percent, and the method is efficient, economical and environment-friendly.
4. The sand washing process is suitable for sand washing operations of horizontal wells, side drilling wells, low-pressure leakage wells and the like.
5. The sand washing process is suitable for various sand washing media, clear water, salt water, foam liquid, gas mixture water, slurry and the like.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. The nitrogen foam ground reversing continuous sand washing system is characterized by comprising an oil field sand washing unit (1) and a circulating supply unit (2);
the oilfield sand washing unit (1) comprises a four-way connecting frame (11), a high-pressure self-sealing blowout preventer (12), an oil pipe (13) and a circulating short section (14); the four-way connecting frame (11) is arranged at a wellhead; the high-pressure self-sealing blowout preventer (12) is arranged at the top of the four-way connecting frame (11); the oil pipe (13) penetrates through the four-way connecting frame (11) and the high-pressure self-sealing blowout preventer (12) to enter the well; the circulation nipple (14) is connected to the top end of the oil pipe (13); a first one-way valve (141) is installed at an opening at the top of the circulation nipple (14), a second one-way valve (142) is installed at an opening on the side wall, and an opening at the bottom is communicated with the oil pipe (13);
the circulating supply unit (2) comprises a circulating sand washing tank (21), sand washing equipment (22), reversing equipment (23) and sand removing equipment (24); the circulating sand washing tank (21) is filled with nitrogen foam sand washing liquid; the liquid pumping port of the sand washing equipment (22) is communicated with the circulating sand washing tank (21); the reversing device (23) is provided with two liquid inlets (231) and two liquid outlets (232); the two liquid inlets (231) are respectively communicated with an outlet of the sand washing equipment (22); the two liquid outlets (232) are respectively communicated with the top opening and the side wall opening of the circulation short section (14); the inlet of the sand removing equipment (24) is communicated with the side outlet of the four-way connecting frame (11), and the outlet of the sand removing equipment (24) is communicated with the circulating sand flushing tank (21).
2. A nitrogen foam ground reversing continuous sand flushing system according to claim 1, characterized in that said liquid outlet (232) has a branched pressure relief port (233).
3. The nitrogen foam ground reversing continuous sand flushing system according to claim 2, wherein plug valves (234) are mounted on the liquid inlet (231), the liquid outlet (232) and the pressure relief port (233).
4. The nitrogen foam ground reversing continuous sand flushing system according to claim 1, characterized in that the sand flushing device (22) is a high pressure pump.
5. The nitrogen foam ground reversing continuous sand flushing system according to claim 1, characterized in that the sand removing equipment (24) comprises a sand flushing circulating water tank and a vibrating screen.
6. The nitrogen foam ground reversing continuous sand flushing system of claim 5, wherein the vibrating screen comprises a shock absorber, a shock excitation motor, a screen box angle adjusting mechanism, a screen fixing mechanism and a base.
7. The nitrogen foam surface reversing continuous sand flushing system according to claim 1, characterized in that the length of the circulation nipple (14) is 290mm, and the maximum outer diameter is 108 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121176063.4U CN215169845U (en) | 2021-05-28 | 2021-05-28 | Nitrogen foam ground reversing continuous sand washing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121176063.4U CN215169845U (en) | 2021-05-28 | 2021-05-28 | Nitrogen foam ground reversing continuous sand washing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215169845U true CN215169845U (en) | 2021-12-14 |
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ID=79373294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121176063.4U Active CN215169845U (en) | 2021-05-28 | 2021-05-28 | Nitrogen foam ground reversing continuous sand washing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215169845U (en) |
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2021
- 2021-05-28 CN CN202121176063.4U patent/CN215169845U/en active Active
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