CN217400881U - Oil-water well comprehensive suction and blockage removal device with microelectronic test instrument - Google Patents

Abstract

The utility model relates to an oil-water well synthesizes suction and removes stifled technical field, specifically disclose an oil-water well synthesizes suction and removes stifled device with microelectronics test instrument, including oil pipe, the sleeve pipe, hang the isolator, a suction tube column subassembly that is used for the oil reservoir to remove stifled, test assembly and hanging the screen pipe, oil pipe installs in the sleeve pipe, suction tube column subassembly installs the lower extreme at oil pipe, test assembly connects the lower part at suction tube column subassembly, be equipped with the suspension type packer between oil pipe and the sleeve pipe, the test assembly lower extreme is equipped with hangs the screen pipe, hang the screen pipe and insert in the oil reservoir, the oil layer section that hangs the screen pipe is opened there is the jet orifice, be equipped with a plurality of small sleeves below hanging the isolator, be equipped with the chemical agent that dissolves the oil reservoir in the small sleeve pipe, the difficult problem of suction unblocking of oil-water well middle and later stage has been solved to this device.

Description

Oil-water well comprehensive suction and blockage removal device with microelectronic test instrument

Technical Field

The application relates to the technical field of comprehensive suction and blockage removal of oil-water wells, and particularly discloses a comprehensive suction and blockage removal device with a microelectronic test instrument for the oil-water wells.

Background

In the middle and later stages of development of the oil field, the oil-water well inevitably generates pollution in a near-wellbore area, so that an oil layer is blocked, and normal production of the oil-water well is influenced, therefore, blockage removal and production increasing of the oil well and blockage removal and injection increasing of the water injection well become common measures for normal maintenance of the oil field. In order to match the production requirements of oil fields, a strong suction production and injection increasing and microelectronic stratum testing composite technology is provided, the technology consists of two parts, the strong negative pressure suction production and injection increasing technology is to add a certain amount of oil-soluble blocking remover into a well, and to complete reciprocating strong suction of a certain stroke by utilizing a packer and a special pipe column under the pulling of an operating machine, so that stratum blocking removal is realized, and the purposes of production increasing and injection increasing of an oil-water well are achieved; the microelectronic stratum testing technology is that a microelectronic instrument is carried in a pipe column in the process of performing powerful pumping on an oil well, and multiple parameters such as micro-pressure difference, micro-temperature difference, micro-vibration, pressure recovery and the like are comprehensively tested on the stratum, so that stratum productivity evaluation is completed, the radial flow state of an oil layer is explained, and variation curves such as the micro-pressure difference, the micro-temperature difference, the main force liquid inlet and outlet profile and the like in the whole process are drawn. The combination of the two technologies has great innovative significance, not only has the effect of increasing the production and injection of an oil-water well, but also has very important effect on the development and evaluation of an oil field, and particularly, the test method is unique, and can be applied to the oil pumping process of a single well and the fracturing process in the strong suction production and injection increasing measure;

in view of the above, we propose an oil-water well comprehensive pumping and plugging removal device with a microelectronic test instrument, which is used to solve the problem of difficult pumping and plugging removal in the middle and later stages of the oil-water well.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problem of difficulty in pumping and blockage removal in the middle and later stages of the oil-water well.

In order to achieve the above object, the present invention provides the following basic scheme:

an oil-water well comprehensive suction and blockage removal device with a microelectronic test instrument,

the principle and effect of this basic scheme lie in:

1. compared with the prior art, the whole set of device is formed by combining a powerful suction technology and an underground storage testing technology, the testing technology of the combined application not only has innovativeness, but also has wide application value, and the testing device can be matched in the oil well fracturing process; the testing technology can be compositely applied in the single-well oil fishing process, and other measure wells can be applied in a matching way.

2. Compared with the prior art, the powerful suction system adopts a comprehensive process technology combining chemical agent blockage removal, positive pressure jet flushing of near-well blockage and negative pressure strong suction reverse blockage removal, has obvious effects on oil well production increase and injection increase of a water injection well, and is a production-promoting process measure worthy of wide popularization and application.

3. The testing technology organically combines the storage type underground ultrasonic television engineering well logging, temperature, pressure, rheology and other stratum tests and the temperature difference, pressure difference and oil well recovery pressure well testing tests together, can test depth, temperature difference, pressure difference, main liquid production layer position, casing corrosion condition and casing loss parameters, creates a new field for the oil reservoir dynamic monitoring technology, and promotes new development of the oil field well logging technology.

4. The whole set of technology has better flexibility, and different combination modes can be provided for different well conditions, for example 51/2 cased wells, so that a packer and a suspension pipe are not needed, and a tubing hanger cup is directly adopted to seal the space of a ring sleeve for directly pumping. In addition, some casing change wells can also be sealed by a leather cup type ring sleeve, so that the pumping blockage removal is realized, and the yield and the efficiency are increased.

Furthermore, a closed coupling is used for connecting the upper oil pipe and the suction pipe column, and a sealing solid gasket is designed in the middle of the closed coupling, so that a cavity of the suction pipe column is separated from the upper oil pipe, and the suction effect is enhanced; the upper part of the pumping main body is connected with the oil pipe, the lower part of the pumping main body is connected with the testing assembly, and the length of the pipe column is determined according to the length of the well section; the packer sealing ring is used as an upper sealing of the suction pipe column and prevents liquid in the suction pipe from flowing upwards; the suction main body sealing ring is used as the middle seal of the suction pipe column and prevents liquid in the suction pipe column from flowing upwards; the suction leather cup is used as a primary sealing link of the suction pipe column, and the forced suction effect of the negative pressure cavity is guaranteed.

Furthermore, the test assembly comprises a pressure bearing support cylinder, an upper anti-vibration pad, an anti-vibration ring, a magnetic positioner, a lower anti-vibration pad, a compression plug and a test instrument.

Furthermore, the bearing support cylinder is in threaded connection with the lower portion of the suction pipe column, the upper anti-vibration pad, the testing instrument, the lower anti-vibration pad and the compression pipe plug are sequentially arranged inside the bearing support cylinder from top to bottom, and the testing instrument comprises a storage type underground ultrasonic television, a magnetic positioner, an underground data acquisition memory, a temperature difference sensor, a vibration sensor, a pressure sensor and a pressure difference sensor.

Further, the storage type underground ultrasonic television, the temperature difference sensor, the vibration sensor and the pressure difference sensor are horizontally arranged.

Furthermore, the underground data acquisition memory is integrally arranged in a stainless steel shell, and the machine core and each functional chip of the underground data acquisition memory store various information acquired by the test instrument in an underground computer system.

Furthermore, a plurality of groups of shockproof rings are embedded between the test instrument and the shell of the pressure-bearing support cylinder.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an oil-water well comprehensive suction and blockage removal device with a microelectronic test instrument according to an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a suction pipe column assembly in the oil-water well comprehensive suction and deblocking device with the microelectronic test instrument according to the embodiment of the application;

fig. 3 shows a schematic structural diagram of a test component in the oil-water well comprehensive suction and unplugging device with the microelectronic test instrument according to the embodiment of the present application.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the objects of the present invention, the following detailed description of the embodiments, structures, features and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.

Reference numerals in the drawings of the specification include: the device comprises an oil pipe 1, a casing pipe 2, a suspension isolator 3, a suction pipe column assembly 4, a testing assembly 5, a suspension sieve pipe 6, an oil layer 7, a closed coupling 2-1, a suction main body 2-2, a packer sealing ring 2-3, a suction main body sealing ring 2-4, a suction cup 2-5, a pressure-bearing support cylinder 3-1, an upper anti-vibration pad 3-2, a downhole data acquisition memory 3-3, an anti-vibration ring 3-4, a magnetic positioner 3-5, a storage type downhole ultrasonic television 3-6, a temperature difference sensor 3-7, a vibration sensor 3-8, a pressure difference sensor 3-9, a lower anti-vibration pad 3-10 and a compression plug 3-11.

Examples are shown in fig. 1, 2 and 3:

the utility model provides an oil-water well synthesizes suction and removes stifled device with microelectronics test instrument, includes oil pipe 1, sleeve pipe 2, hangs isolator 3, is used for oil reservoir 7 to remove stifled suction tube column subassembly 4, test component 5 and hangs screen pipe 6, oil pipe 1 installs in sleeve pipe 2, and suction tube column subassembly 4 installs the lower extreme at oil pipe 1, and test component 5 connects in the lower part of suction tube column subassembly 4, is equipped with suspension type packer between oil pipe 1 and the sleeve pipe 2, and test component 5 lower extreme is equipped with hangs screen pipe 6, hangs screen pipe 6 and inserts in the oil reservoir 7, and 7 sections of oil reservoir that hang screen pipe 6 open there is the jet orifice, hang and be equipped with a plurality of small sleeves 2 below the isolator 3, are equipped with the chemical agent that dissolves oil reservoir 7 in the small sleeve 2.

An oil pipe 1: powerful suction is completed under the action of the operation machine, the suction pipe column assembly 4 and the suction pipe column perform reciprocating suction movement, when the pipe column is lowered, liquid dissolved with a blocking remover is quickly sprayed from a jet hole of the small casing 2 into an oil layer 7 under the action of the pressure of the pipe column, and the positive pressure is used for flushing the stratum; when the pipe column is lifted, the negative pressure generated by the powerful suction effect enables the liquid in the oil layer 7 to rapidly flow to the shaft, so that the alternating effect is realized, and the effect of removing the blockage of the oil layer 7 is achieved. Therefore, the sealing structure of each section of the pumping special pipe column must be designed;

the tester is connected with the lower part of the suction pipe column assembly 4, and because the liquid fluctuation is large in the suction process and positive pressure and negative pressure are generated alternately, the tester arranged in the test outer pipe must strictly design a shockproof structure, a suspension sieve pipe 6 is designed below a suspension packer, a suspension sieve pipe 6 is designed below the suspension packer, and a jet hole is formed in the oil layer 7 section of the suspension sieve pipe 6, so that fluid in a shaft can be forced to enter the oil layer 7 in the form of jet flow in the suction process, and the fluid can rapidly enter the shaft when the negative pressure returns and stably flows into the suction pipe column; and an oil layer 7, wherein a single oil layer 7 can be selected or a plurality of oil layers 7 can be selected according to needs during well selection by measures.

As shown in fig. 2, the suction pipe column assembly 4 comprises a closed coupling 2-1, a suction main body 2-2, a packer sealing ring 2-3, a suction main body sealing ring 2-4 and a suction cup 2-5, wherein the closed coupling 2-1 is used for connecting an upper oil pipe 1 and a suction pipe column, and a sealing solid gasket is designed in the middle to separate a suction pipe column cavity from the upper oil pipe 1, so that the suction effect is enhanced; the upper part of the pumping main body 2-2 is connected with the oil pipe 1, the lower part of the pumping main body is connected with the testing component 5, and the length of the pipe column is determined according to the length of the well section; the packer sealing ring 2-3 is used as an upper sealing of the suction pipe column and prevents liquid in the suction pipe from flowing upwards; the suction main body sealing rings 2-4 are used as middle sealing of the suction pipe column and prevent liquid in the suction pipe column from flowing upwards; the suction leather cups 2-5 are used as a primary sealing link of the suction pipe column to ensure the forced suction effect of the negative pressure cavity;

as shown in the test assembly 5 of fig. 3, the test assembly 5 comprises a pressure-bearing support cylinder 3-1, an upper anti-vibration pad 3-2, an anti-vibration ring 3-4, a magnetic positioner 3-5, a lower anti-vibration pad 3-10, a compression plug 3-11 and a test instrument, wherein the pressure-bearing support cylinder 3-1 is used as a general support pipe of the test instrument and is connected with a thread at the lower part of a suction pipe column, and a liquid circulation window is arranged at the position of a sensor at the lower part in order to ensure the collection of the underground integral information; the upper anti-vibration pad 3-2 plays a role in anti-vibration and righting of the test instrument; the data acquisition memory 3-3 in the pit, the heart of the instrument here, seal in the stainless steel outer cover integrally, every functional chip of the inner works stores various information that the test instrument gathers in the computer system in the pit, refer to the ground and replay and process, read and print, draw the curve; a plurality of groups of shockproof rings 3-4 are embedded between the test instrument and the shell for protecting the stable work of the instrument; the magnetic positioner 3-5, this instrument because of supporting the tube type structure, choose the instrument external diameter to be larger, the magnetic material function is stronger, so the magnetic pulse signal change amplitude is larger, facilitate correcting the depth of the test curve; the storage type underground ultrasonic television 3-6 is a latest subject, the technical problem of solving the storage type underground ultrasonic television 3-6 is a new development of the current logging technology, and the real situation of a casing 2 at a section 7 of an oil reservoir can be accurately monitored; detecting the damage condition of the casing 2 together with the magnetic positioning pulse signal; the temperature difference sensors 3-7 are used for testing the temperature change conditions of all points in the whole powerful suction process and the temperature change positions of temperature difference disturbance points, and analyzing the effective layer positions of the main water injection after the blockage removal effect is achieved; the vibration sensors 3-8 have larger impact on the piezoelectric sensor by fluid in the reciprocating pumping process, and the disturbance pulses of the main liquid inlet layer and the main liquid outlet layer are more obvious, so that the main power liquid production layer position of the oil well or the main water absorption layer position of the water injection well can be found out; and the pressure differential pressure sensors 3-9 are used for testing the pressure change condition of each point in the whole process of powerful suction, the pressure difference change condition of forward and reverse strokes and the comparison condition of the formation pressure before and after plugging removal. The well shut-in and logging formation pressure recovery curve after the blockage removal is carried out, the current formation productivity condition is analyzed by observing the radial flow curve of the shaft and the formation, the effective liquid supply radius is obtained, and the effective condition of the oil layer 7 for strong suction blockage removal is known by calculating the skin coefficient of the formation before and after the blockage removal; the lower shockproof pad 3-10 has a certain thickness as the upper shockproof pad 3-2, and has the double functions of strengthening the body and preventing shock; 3-11 of the plug is pressed, the instrument is screwed tightly before going into the well, and a shockproof anti-drop pad is added.

The specific implementation process comprises the following steps:

1. selecting a well selection scheme, carefully selecting a well before measures in order to achieve a yield increase effect, fully knowing the well history, and determining a measure process scheme according to a geological scheme;

2. preparing a corresponding powerful suction pipe column assembly 4, and carefully checking the connecting piece and the sealing piece before descending the well;

3. setting a sampling program for a testing instrument before descending a well, ensuring 10 groups of data per meter, and then carefully assembling a testing pipe column, wherein a main connecting point needs to be provided with a positioning screw;

4. preparing a certain amount of chemical agent into emulsion, and injecting the emulsion into a well bore of the pumping pipe column for later use;

5. according to the requirement of the scheme, after the composite pipe column is lowered to the designated position, the operation machine starts to continuously suck at the frequency of 2 times per minute, and the change condition of the liquid discharge capacity of the oil layer 7 is confirmed according to the change condition of the suction load in the continuous suction process; after the continuous pumping is carried out for 60 minutes, the pumping is stopped for 10 minutes, the pumping is carried out for 60 minutes again to compare the pumping load change condition, the pumping is carried out for three times continuously, the reduction of the jet flow resistance of the lower stroke is confirmed, the composite aggravation of the upper stroke and the lifting is confirmed, and the blockage removal effect is proved;

and after the pumping is finished, if the scheme requires to measure the recovery pressure, stopping the operation, stabilizing the time required by the scheme, extracting the tubular column, taking out the test instrument, performing data processing, printing data, drawing a curve and finishing comprehensive explanation.

Safety assurance in work:

1. carrying out a pressure-resistant (50MPa) ground test on the whole device strictly according to the technical requirements, and strictly calibrating each parameter of a test instrument;

2. the operation construction is stably operated strictly according to the HSE standard of the oil field, so that the clamping of the whole device is accurate and error-free, and underground falling objects are not allowed to be generated, thereby causing major accidents such as operation rework or oil well overhaul and the like;

3. because the composite process measures of chemical blockage removal, spray blockage removal and strong negative pressure blockage removal are adopted, the chemical blockage removal agent must have reliable performance, and the safety of site construction is ensured;

4. safety articles must be equipped for site operation and vehicles, and personnel wear the safety labor insurance articles and listen to unified command to prevent all safety accidents from happening;

and a blowout preventer is added at a construction wellhead to prevent blowout in the strong pumping process.

The device solves the problem of difficult pumping and blockage removal in the middle and later periods of the oil-water well.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention has been disclosed by the preferred embodiment, it is not limited to the present invention, and any person skilled in the art can make modifications or changes equivalent to the equivalent embodiments by utilizing the above disclosed technical contents without departing from the technical scope of the present invention, but all the modifications, changes and changes of the technical spirit of the present invention made to the above embodiments are also within the scope of the technical solution of the present invention.

Claims (8)

1. The utility model provides an oil-water well synthesizes suction and removes stifled device with microelectronics test instrument which characterized in that: including oil pipe, sleeve pipe, suspension isolator, be used for the oil reservoir to separate stifled suction tube column subassembly, test assembly and hang the screen pipe, oil pipe installs in the sleeve pipe, and suction tube column subassembly installs at oil pipe's lower extreme, and test assembly connects in the lower part of suction tube column subassembly, be equipped with the suspension packer between oil pipe and the sleeve pipe, the test assembly lower extreme is equipped with and hangs the screen pipe, hang the screen pipe and insert in the oil reservoir, the oil layer section of hanging the screen pipe is opened there is the jet orifice, be equipped with a plurality of little casings below the suspension isolator, be equipped with the chemical agent that dissolves the oil reservoir in the little casing.

2. The comprehensive pumping and unblocking apparatus for oil and water wells with microelectronic test instrument as claimed in claim 1, wherein the pumping tube assembly includes a sealing collar, a pumping body, a packer sealing ring, a pumping body sealing ring and a pumping cup.

3. The comprehensive pumping and unblocking apparatus for oil-water well with microelectronic test instrument as claimed in claim 2, wherein the closed coupling is used to connect the upper oil pipe and the pumping string, and the middle of the closed coupling is designed with a solid sealing gasket to separate the pumping string cavity from the upper oil pipe, so as to enhance pumping effect; the upper part of the pumping main body is connected with the oil pipe, the lower part of the pumping main body is connected with the testing assembly, and the length of the pipe column is determined according to the length of the well section; the packer sealing ring is used as an upper sealing of the suction pipe column and prevents liquid in the suction pipe from flowing upwards; the suction main body sealing ring is used as the middle seal of the suction pipe column and prevents liquid in the suction pipe column from flowing upwards; the suction leather cup is used as a primary sealing link of the suction pipe column, and the forced suction effect of the negative pressure cavity is guaranteed.

4. The comprehensive pumping and unblocking apparatus for oil-water well with microelectronic test instrument as claimed in claim 1, wherein the test assembly includes bearing support cylinder, upper shock pad, shock ring, magnetic positioner, lower shock pad, pressing plug and test instrument.

5. The comprehensive pumping and unblocking apparatus for oil-water well with microelectronic test instrument as claimed in claim 4, wherein the pressure bearing support cylinder is connected to the lower part of the pumping pipe string via screw thread, and the upper vibration isolating pad, the test instrument, the lower vibration isolating pad and the pressing pipe plug are set inside the pressure bearing support cylinder successively from top to bottom.

6. The comprehensive pumping and unblocking apparatus for oil-water well with microelectronic test instrument as claimed in claim 5, wherein the storage type downhole ultrasonic TV, the temperature difference sensor, the vibration sensor and the pressure difference sensor are horizontally arranged.

7. The comprehensive pumping and unblocking apparatus for oil-water well with microelectronic test instrument as claimed in claim 6, wherein the downhole data acquiring memory is integrated inside stainless steel casing, and the core and the functional chips of the downhole data acquiring memory store the information acquired by the test instrument in the downhole computer system.

8. The comprehensive pumping and unblocking apparatus for oil-water well with microelectronic test instrument as claimed in claim 5, wherein multiple sets of shockproof rings are embedded between the test instrument and the casing of the pressure bearing support cylinder.

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