CN220726251U - Process pipe column for uniform injection of screen pipe completion horizontal well - Google Patents

Abstract

The utility model discloses a process pipe column for uniformly spraying a screen pipe completion horizontal well, which comprises a sand discharge inner pipe and a jet outer pipe; the sand discharge inner pipe is arranged in the jet outer pipe, the sand discharge inner pipe is connected with the axial front end of the jet outer pipe through a bidirectional liquid flow reverser, and the sand discharge inner pipe is connected with the axial rear end of the jet outer pipe through an inner pipe fixing device and an outer pipe fixing device; and a turbine injection device is arranged on the jet outer tube. The utility model realizes the sectional unblocking of the long horizontal well section and solves the problem of uneven traditional unblocking mode; when the liquid injected from the wellhead passes through the turbine, the continuity is destroyed, and an oscillation effect is generated, so that the plugs on the inner wall of the sand filtering pipe and the near-wellbore zone are removed.

Description

Process pipe column for uniform injection of screen pipe completion horizontal well

Technical Field

The utility model relates to the technical field of oilfield blocking removal, in particular to a process pipe column for uniformly spraying a screen pipe well completion horizontal well.

Background

The thick oil underground crude oil has high viscosity and poor fluidity, resulting in poor exploitation effect. In order to increase the oil drainage area of the heavy oil reservoir, horizontal well exploitation is mostly adopted, and a well completion mode is mostly selected to use a precise micropore sand filtering pipe well completion, so that on one hand, the oil drainage area can be increased, and on the other hand, the sand blocking effect can be achieved.

Because the outer annular channels of the sieve tube and the well wall are filled with slurry in the drilling process, and the heterogeneity of the stratum is added, the forward and reverse circulation well washing adopted in well completion has a bypass phenomenon, so that the effect is not ideal when partial horizontal wells are put into production. There are generally three reasons:

1. the technical level of early cleaning of the sand filtering pipe is limited, so that low liquid amount is caused during production;

2. because of long production time, the mud, thick oil and fine sand are transported to cause the blockage of the near-wellbore zone;

3. the flowback is incomplete due to objective factors such as tools and the like, and the productivity of the oil well cannot be effectively released.

In order to further release the oil well productivity, the blocking removal construction is often carried out in the production process, the conventional blocking removal mode is mainly used for removing the blocking in a general way, the well flushing liquid preferentially enters the high-permeability well section, the effect that the blocking removal is needed is not achieved, the oil layer well section into which the well flushing liquid enters is not needed, and no effect or poor effect is achieved after the measures.

Publication (bulletin) number: CN116025308A discloses a layered blocking removing and sand preventing combined device, which relates to the technical field of oilfield development engineering, and comprises an oil well casing, wherein the oil well casing is internally provided with an oil pipe, the outer surface wall of the oil pipe is provided with a sand blocking removing device, the inside of the oil well casing is provided with a slip type layered packer, the slip type layered packer is positioned below the sand blocking removing device, the outer surface wall of the oil pipe is provided with a jet sand blaster, the jet sand blaster is positioned below the sand blocking removing device, and the inner surface wall of the oil well casing is provided with a hydraulic control sand blocking preventing packer. The device realizes the combined operation device for firstly removing the blockage by jet flow and then filling sand prevention in the stratum by using the first tubular column and the matched tool thereof, and the operation method thereof, is used for completing the combined operation construction of firstly removing the blockage and then sand prevention of the first tubular column, and is more beneficial to improving the sand prevention effect, improving the construction efficiency and saving the cost.

The prior art has a practical use effect which is not as good as that of the utility model.

Publication (bulletin) number: CN107083942B discloses a low-frequency pulse blocking-removing and injection-increasing device, which consists of a wellhead filter and a downhole pulse pipe column; the underground low-frequency pulse pipe column comprises an outer sleeve, an inner protection cylinder, an inner and outer support pipe, a mechanical power drilling tool, a spherical universal shaft, a liquid output channel, a pulse water spraying device, a pressure control valve and a spring; the inner layer protection cylinder is sleeved in the outer layer sleeve; the upper end of the mechanical power drilling tool is fixed at the upper end of the inner layer protection cylinder; the upper end of the spherical universal shaft is assembled and connected with the lower end of the mechanical power drilling tool; the upper end of the liquid output channel is sleeved outside the lower end of the spherical universal shaft; the lower end of the pulse water spraying device is assembled and connected with a pressure control valve, and the upper end of the pulse water spraying device is sleeved outside the lower end of the liquid output channel; a spring is arranged at the outlet of the lower end of the pressure control valve; a water outlet is also arranged at one side of the pulse water spraying device, and the water outlet is transversely connected with the pulse water spraying device and penetrates through the outer sleeve. The utility model has a purely mechanical structure, can be placed underground for a long time to perform continuous and uninterrupted blocking removal on stratum, and has good blocking removal effect.

The prior art has a practical use effect which is not as good as that of the utility model.

Publication (bulletin) number: CN111042767B discloses a horizontal well sectionalized acidizing filling sand control integrated tubular column and a method, the integrated tubular column comprises an outer tubular column and an inner tubular column, the inner tubular column is positioned inside the outer tubular column, the outer tubular column comprises an open hole packer, a sand filtering pipe, a bidirectional nest type sealing device, an outer tubular column connecting pipe, an outer filling device and a plug which are sequentially connected from top to bottom, the inner tubular column comprises a flow blocking packer, an expansion packer, an inner tubular column connecting pipe, an acid spraying packer and an inner filling device which are sequentially connected from top to bottom, and the flow blocking packer, the expansion packer and the acid spraying packer are all set on the inner wall of the sand filtering pipe. The utility model can realize the segmented pickling, circulating filling and extrusion filling sand prevention construction of the long well section of the horizontal well by one pipe column, ensure the good blocking removal effect of the open hole horizontal section, fully exert the productivity of the open hole horizontal well and achieve the optimal sand prevention production effect.

The prior art has a practical use effect which is not as good as that of the utility model.

In summary, the technical scheme of the above disclosed technology, the technical problems to be solved and the beneficial effects are different from those of the present utility model, and the above disclosed technical documents have no technical teaching for more technical features of the present utility model, the technical problems to be solved and the beneficial effects.

Disclosure of Invention

Aiming at the defects existing in the prior art, the utility model aims to provide a turbine injection uniform blocking removal process pipe column for a screen pipe completion horizontal well, which can realize uniform blocking removal of a long-well section sand screen pipe completion horizontal well, effectively remove pollution caused by mud, oil sludge, fine sand and the like outside the sand screen pipe and in a near-wellbore zone, and effectively release the productivity of an oil well.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

a screen pipe well completion horizontal well uniform injection process pipe column comprises a sand discharge inner pipe and a jet outer pipe; the sand discharge inner pipe is arranged in the jet outer pipe, the sand discharge inner pipe is connected with the axial front end of the jet outer pipe through a bidirectional liquid flow reverser, and the sand discharge inner pipe is connected with the axial rear end of the jet outer pipe through an inner pipe fixing device and an outer pipe fixing device; and a turbine injection device is arranged on the jet outer tube.

The jet outer pipe is provided with a packer, and the packer comprises a first packer arranged behind the bidirectional liquid flow reverser and a second packer arranged in front of the inner pipe fixing device and the outer pipe fixing device.

The turbine injection device comprises an injection hole and a turbine arranged in the injection hole;

the jet outer pipe is provided with a jet hole between the first packer and the second packer; and an annulus between the jet outer pipe and the sand discharge inner pipe is a jet cavity.

The axial front end of the bidirectional liquid flow reverser is connected with an oil pipe, and a first channel and a second channel are arranged in the bidirectional liquid flow reverser;

the first channel is in a shape of a fish fork, the oil pipe is communicated with the jet flow cavity, the second channel is in a shape of a T, and the sand discharging inner pipe is communicated with the annular space of the oil jacket outside the pipe column.

The inner and outer tube fixing device is arranged at the axial rear end of the jet flow cavity.

At least two jet holes are arranged;

the jet hole is a conical hole, and the aperture of the jet hole on the inner wall of the jet outer tube is larger than that of the jet hole on the outer wall of the jet tube;

the jet hole gradually increases with the distance from the bidirectional liquid flow reverser, and the inner hole aperture and the outer hole aperture of the conical hole gradually become larger.

The wall of the area where the jet holes are arranged on the jet outer pipe is thickened to enable the cone Kong Bianchang; the jet hole is internally provided with a turbine with the size corresponding to the jet hole.

The first packer and the second packer are expanding packers.

The axial rear end of the sand discharge inner pipe is provided with a rotational flow sand suction device;

the cyclone sand sucking device is provided with a sand sucking port in the bottom edge leaning area, and the sand sucking port is communicated with the inside of the sand discharging inner pipe through a spiral channel in the cyclone sand sucking device.

Compared with the prior art, the utility model has the following beneficial effects:

1. the sectional blocking removal of the long horizontal well section is realized, and the problem of nonuniform traditional blocking removal modes is solved;

2. the jet device on the jet outer tube is designed in a variable size, so that uniform jet is ensured;

3. when the liquid injected from the wellhead passes through the turbine, the continuity is destroyed, and an oscillation effect is generated, so that the plugs on the inner wall of the sand filtering pipe and the near-wellbore zone are removed;

4. the well bore can be thoroughly cleaned by the cyclone sand sucking device.

Drawings

FIG. 1 is a schematic diagram of a well horizontal well screen completion well uniformly injection process string according to the present utility model;

FIG. 2 is a schematic axial cross-sectional view of a bi-directional flow reverser of a process string for uniform injection in a screen well completion horizontal well of the present utility model;

FIG. 3 is a schematic view of a radial cross-sectional configuration of a bi-directional flow reverser of a process string for uniform injection in a screen completion horizontal well of the present utility model;

FIG. 4 is a schematic view of a turbine injection apparatus of a process string for uniform injection in a screen well completion horizontal well according to the present utility model;

FIG. 5 is a table of the plugging removal construction pumping program of the process pipe string for uniform injection of the screen well completion horizontal well;

in the figure: 1. an oil pipe; 2. a bidirectional flow diverter; 21. a first channel; 22 a second channel; 3. a jet outer tube; 4. a first packer; 5. a turbine injection device; 6. a second packer; 7. an inner and outer tube fixing device; 8. a rotational flow sand sucking device; 9. a sand discharge inner pipe; 10. the bridge plug and the well flushing valve of the horizontal well are closely inserted.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1:

referring to fig. 1 to 4, the utility model provides a process pipe column for uniformly spraying a screen well completion horizontal well, which comprises a sand discharge inner pipe 9 and a jet outer pipe 3; the sand discharge inner pipe 9 is arranged in the jet outer pipe 3, and the sand discharge inner pipe 9 is connected with the axial front end of the jet outer pipe 3 through a bidirectional liquid flow reverser; the sand discharge inner pipe 9 is connected with the axial rear end of the jet outer pipe 3 through an inner pipe fixing device, and a packer is arranged on the jet outer pipe 3;

the packer comprises a first packer 4 arranged behind the bidirectional liquid flow reverser 2 and a second packer 6 arranged in front of the inner pipe fixing device 7 and the outer pipe fixing device 7;

the jet outer pipe 3 is provided with a jet hole between the first packer 4 and the second packer 6; the annular space between the jet outer tube 3 and the sand discharge inner tube 9 is a jet cavity;

the axial front end of the bidirectional liquid flow reverser 2 is connected with the oil pipe 1, a first channel 21 and a second channel 22 are arranged in the bidirectional liquid flow reverser 2, the first channel 21 is in a fish-fork shape, the oil pipe 1 is communicated with the jet flow cavity, the second channel 22 is in a T shape, and the sand discharge inner pipe 9 is communicated with an oil jacket annulus outside the pipe column; the first channel 21 is staggered from the second channel 22; (the positional relationship of the connection of the oil pipe 1, the sand discharge inner pipe 9, the jet outer pipe 3 and the bidirectional liquid flow reverser 2 will be apparent to those skilled in the art from the description of this paragraph in connection with the accompanying drawings)

The inner and outer pipe fixing device is arranged at the axial rear end of the jet flow cavity;

the jet holes are conical holes, the aperture of the jet hole on the inner wall of the jet outer tube 3 is larger than that of the jet hole on the outer wall of the jet tube 3, the liquid flow speed is gradually reduced due to the influence of friction resistance and the like, and in order to ensure uniform injection, the aperture of the inner hole and the aperture of the outer hole of the conical holes are gradually increased along with the increase of the distance between the jet holes and the bidirectional liquid flow reverser 2;

the pipe wall of the area provided with the jet hole on the jet outer pipe 3 is thickened to enable the cone Kong Bianchang; the jet hole is internally provided with a turbine with the size corresponding to that of the jet hole, the turbine breaks the continuity of liquid flow into pulse liquid flow, a blocking object can be separated under vibration, the blocking knowing efficiency is improved, and the jet hole and the turbine form a turbine injection device;

the packer is an expansion type packer, is pressed by a wellhead pump truck, so that the expansion diameter of a packer rubber cylinder is increased to realize annular sealing of an oil sleeve, multiple setting can be realized, and the oil sleeve is lifted up to finish deblocking after finishing operation (the expansion type packer is an expansion type packer which is independently controllable and is disclosed in the prior art, such as a publication (announcement) No. CN113250645B, a publication (announcement) No. CN218439311U, a publication (announcement) No. CN116066012A, and a small-diameter expansion type packer, and can be used as the expansion type packer of the utility model).

The sand discharging inner pipe 9 is provided with a rotational flow sand sucking device 8 at the axial rear end, the rotational flow sand sucking device 8 is provided with a sand sucking port in the bottom edge area, the sand sucking port is communicated with the inside of the sand discharging inner pipe 9 through a spiral channel inside the rotational flow sand sucking device 8, when sand is sucked, high-speed water flow in the spiral channel can reduce the pressure near the sand sucking port, and the blocking objects such as oil mud sand generated by blocking removal are ensured to smoothly enter the sand discharging inner pipe 9, enter an oil collar for controlling through the bidirectional liquid flow reversing device 2 and are discharged from a wellhead.

The sand discharge inner pipe 9 is arranged in the jet outer pipe 3 and is used for discharging the blockage such as mud, oil sludge and fine sand generated after blockage removal.

When the pipe column is used, the bridge plug and the horizontal well flushing valve are closely inserted 10 into the bottom of the well in advance, the bridge plug and the horizontal well flushing valve are closely inserted 10 into the matched equipment of the lower flushing valve when the horizontal well is drilled, and the well flushing valve can be connected with the stratum by closely inserting the bottom of the well.

The blocking removing liquid is pumped from the oil pipe 1, enters a jet cavity through the bidirectional liquid flow reverser 2, and is sprayed to the blocking object from the turbine spraying device 5, so that the blocking object is fallen off;

the oil sleeve annulus is pumped, so that the fallen silt enters the pipe column from the seal plug 10, enters the sand discharging inner pipe 9 through the rotational flow sand sucking device 8, reaches the oil sleeve annulus through the bidirectional liquid flow reverser 2, and is pumped out from the wellhead.

The construction process of the pipe column is (taking a dip 5-flat 21 well as an example, other equipment used in the construction process is equipment which can be purchased in the market, and the technical personnel in the field are clear of the equipment):

1. flushing and lifting the original well pipe column: and (3) lifting the production pipe column in the well, and accurately measuring and checking the quantity and quality of the oil pipes and the like. And recording and corresponding processing are performed.

2. Lower sand washing pipe: the bottom of the oil pipe is provided with a pen point sand detection surface, sand is washed to 1410.5m below the artificial bottom, and the large-discharge backwash well of the local hot sewage is used for more than half a week.

3. Pigging and pressure testing: running a logging tool with phi 152mm multiplied by 1200mm to 1410.5m. The pressure of the oil pipe is tested at 25Mpa, the pressure is stabilized for 15min, and the pressure drop is less than 0.5 Mpa.

4. And (5) plugging a bridge plug and a well flushing valve of the horizontal well into the well.

5. A screen pipe completion horizontal well uniform injection process pipe column is put in: a process pipe column for uniformly spraying the well completion horizontal well with a screen pipe is arranged at the bottom 1408m, a wellhead blowout preventer is connected, each section is designed to be 10m, and the plugging is gradually removed upwards from the bottom to the upper section. The pumping procedure is completed in 17 sections, and the tubing is removed after completion, as shown in fig. 5. (this string strictly prohibits back flushing).

6. Recovering waste liquid: the job team prepares the residual cleaning fluid recovery tank car 3 to timely recover the returned residual cleaning fluid.

7. And after the plug removing pipe column is pulled out and plugged in a sealing way, the plug removing pipe column is put into a light oil pipe back flushing well, and the large-displacement back flushing well is carried out until the outlet water quality is consistent with the inlet water quality, and the plug removing construction is completed.

8. And (5) setting a well completion production string according to the requirements, testing and taking out to be qualified, and intersecting the well on site according to the standard.

All parts themselves which are not discussed in the present application and all parts connection modes in the present application belong to the known technology in the technical field. The preparation can be directly applied and is not repeated.

In the present utility model, the term "plurality" means two or more, unless explicitly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or units referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model.

In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (9)

1. A screen pipe well completion horizontal well uniform injection process pipe column comprises a sand discharge inner pipe and a jet outer pipe; the sand discharge inner pipe is arranged in the jet flow outer pipe and is characterized in that;

the sand discharging inner pipe is connected with the axial front end of the jet flow outer pipe through a bidirectional liquid flow reverser, and the sand discharging inner pipe is connected with the axial rear end of the jet flow outer pipe through an inner pipe fixing device;

and a turbine injection device is arranged on the jet outer tube.

2. The horizontal well uniform jet process string for screen well completion according to claim 1, wherein a packer is provided on the jet outer tube, the packer comprising a first packer provided after the bi-directional flow reverser and a second packer provided before the inner and outer tube fixtures.

3. The horizontal well homogeneous injection process string for a screen completion of claim 2, wherein the turbine injection device comprises an injection orifice and a turbine disposed in the injection orifice;

the jet outer pipe is provided with a jet hole between the first packer and the second packer; and an annulus between the jet outer pipe and the sand discharge inner pipe is a jet cavity.

4. A screen well completion horizontal well uniform injection process string according to claim 3 and wherein said bi-directional flow diverter is axially forward connected to tubing, said bi-directional flow diverter having a first passage and a second passage disposed therein;

the first channel is in a shape of a fish fork, the oil pipe is communicated with the jet flow cavity, the second channel is in a shape of a T, and the sand discharging inner pipe is communicated with the annular space of the oil jacket outside the pipe column.

5. A screen well completion horizontal well uniform injection process string according to claim 3 and wherein said inner and outer tube securing means are disposed axially rearward of the jet chamber.

6. A screen well completion horizontal well uniform injection process string according to claim 3 wherein said jet holes are provided in at least two;

the jet hole is a conical hole, and the aperture of the jet hole on the inner wall of the jet outer tube is larger than that of the jet hole on the outer wall of the jet tube;

the jet hole gradually increases with the distance from the bidirectional liquid flow reverser, and the inner hole aperture and the outer hole aperture of the conical hole gradually become larger.

7. The horizontal well uniform injection process tubular column for screen well completion according to claim 6, wherein the wall of the area where the jet holes are arranged on the jet outer tube is thickened to form a cone Kong Bianchang; the jet hole is internally provided with a turbine with the size corresponding to the jet hole.

8. The horizontal well homogeneous injection process string of claim 2, wherein the first and second packers are expanding packers.

9. The well completion horizontal well uniform injection process pipe column according to claim 1, wherein a rotational flow sand sucking device is arranged at the axial rear end of the sand discharge inner pipe;

the cyclone sand sucking device is provided with a sand sucking port in the bottom edge leaning area, and the sand sucking port is communicated with the inside of the sand discharging inner pipe through a spiral channel in the cyclone sand sucking device.