CN210483714U

CN210483714U - Multichannel annular space leaking stoppage simulation experiment device

Info

Publication number: CN210483714U
Application number: CN201920922250.9U
Authority: CN
Inventors: 张鹏; 续化蕾; 马超
Original assignee: Yangtze University
Current assignee: Yangtze University
Priority date: 2019-06-18
Filing date: 2019-06-18
Publication date: 2020-05-08
Anticipated expiration: 2029-06-18

Abstract

The utility model relates to a drilling fluid high temperature ageing equipment technical field discloses a multichannel annular space leaking stoppage simulation experiment device, include: the device comprises a gas source, a manifold assembly, a middle container and a multi-channel assembly, wherein the middle container comprises a simulation shaft, a simulation drill cylinder and a joint, and two ends of the simulation drill cylinder are rotationally connected in the simulation shaft; the two clampers comprise clamping pipelines, valves and multi-channel components which are sequentially communicated on the clamping pipelines; the multi-channel assembly comprises a plurality of slit pipelines, a slit plate, an output connector and an air source connector, wherein the slit plate, the output connector and the air source connector are sequentially communicated with each slit pipeline. The utility model adopts the two clampers to simulate the loss conditions of different layers of real drilling; the multi-channel component is used for simultaneously measuring at least four groups of leakage stoppage experimental data under the same condition, so that the experimental adjustment uniformity of the data is ensured; the experimental device is reliable in principle and simple to operate, and can simulate the leakage stopping effect of the leakage stopping liquid under the high-pressure annulus and evaluate the leakage stopping effect.

Description

Multichannel annular space leaking stoppage simulation experiment device

Technical Field

The utility model belongs to the technical field of oil and gas exploitation simulation stratum leaking stoppage experimental apparatus and specifically relates to a multichannel annular space leaking stoppage simulation experimental apparatus is related to.

Background

In oil exploration and development, a well is generally set for development, formation gaps in the well can cause drilling fluid to enter the formation gaps to be greatly leaked out, and in severe cases, the drilling fluid can replace gas, so that shaft overflow is induced, well blowout is caused, the safety of drilling equipment and personnel is endangered, and oil resources are also damaged. Therefore, it is important to adopt reasonable leakage-proof measures and leakage-stopping materials by studying and knowing the leakage-proof mechanism and the influencing factors thereof. In practical studies, above-ground plugging simulation experiments are generally performed by simulating the loss in a well. Because fractures with different shapes generally exist in the stratum, such as vertical joints, horizontal joints, oblique joints and other irregular joints, and fractures of different stratum parts in the drilling well also have different shapes, the existing experimental device usually evaluates the plugging effect of the plugging fluid only by the plugging effect of the fractures with a single shape in a single experiment, cannot simultaneously simulate the plugging effect by the coexistence of multiple fractures and different stratum gaps, has a certain difference from the actual condition, and influences the final evaluation result.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problem, the embodiment of the utility model provides a multichannel annular space leaking stoppage simulation experiment device, its technical scheme as follows:

a multi-channel annulus leakage stoppage simulation experiment device comprises an intermediate container and a gas source, wherein the intermediate container comprises a joint and a simulation shaft, one end of the simulation shaft is open, the other end of the simulation shaft is closed, the joint comprises a connecting pipeline, an end cover and a first gas source joint, one end of the connecting pipeline is communicated with the open end of the simulation shaft, the other end of the connecting pipeline is sealed by the end cover, a central through hole of the end cover is communicated with the first gas source joint, and the gas source supplies pressure gas to the simulation shaft through the joint; this multichannel annular space leaking stoppage simulation experiment device still includes:

the clamping devices are fixed on the side wall of the simulated shaft in a vertically staggered mode respectively, each clamping device comprises a clamping pipeline, a valve and a multi-channel assembly, one end of each clamping pipeline is communicated with an opening correspondingly formed in the side wall of the simulated shaft, the other end of each clamping pipeline extends outwards along the flow direction of the leakage-stopping liquid and is sequentially communicated with the valve and the multi-channel assembly.

The embodiment of the utility model provides a technical scheme includes following beneficial effect at least:

the utility model adopts the technical scheme that two clampers are arranged to simulate the gap data of different layers; the multi-channel component can be used for simultaneously measuring at least four groups of leakage stoppage experimental data under the same condition, so that the experimental adjustment uniformity of the data is ensured; the experimental device is reliable in principle and simple to operate, and can simulate the leakage stopping effect of the leakage stopping liquid under the high-pressure annulus and evaluate the leakage stopping effect.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

In the present invention, unless otherwise expressly specified or limited, the term "disposed" is to be understood in a broad sense and can be either a static or a dynamic coupling or a non-removable or a removable coupling; the connection is directly connected into a whole, the connection is a detachable connection, and the fixation is a static connection; the sleeve joint can be a sleeve joint which is sleeved outside a certain part without contacting, a sleeve joint which is sleeved outside the certain part and is in threaded connection with the certain part, or a sleeve joint which is sleeved outside the certain part and is detachable; the threaded connection means the connection by thread engagement and rotation; "rotationally coupled" means coupled by balls, rollers, etc., and one or both of the two coupling members can rotate; the 'flow direction of the leakage stoppage liquid' only refers to the flow direction from inside to outside of the 'simulation pitshaft' provided by the utility model; "communicate" means "fixed" or "connected" together and the internal spaces are in communication; unless otherwise specifically defined, the specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.

Drawings

FIG. 1 is a schematic structural view of a multi-channel annulus plugging simulation experiment device provided by an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a top portion of an intermediate container provided by an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a bottom of an intermediate container provided by an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a three-channel module provided by an embodiment of the present invention;

in the figure:

1 intermediate container, 10 simulated shafts, 100 first couplings, 1000 first rings, 1001 second rings, 101 second couplings, 1010 first discs, 1011 second discs, 11 simulated drill cylinders, 110 annular empty ports, 12 joints, 120 connecting pipelines, 121 end covers, 122 first air source connectors, 13 oil seal lips, 14 Glare rings, 15O-shaped rings, 2 first clamps, 20 first clamping pipelines, 21 first valves, 22 first multi-channel assemblies, 221 first gap pipelines, 3 second clamps, 30 second clamping pipelines, 31 second valves, 32 second multi-channel assemblies, 321 second gap pipelines, 4 stirring devices, 40 stirring blades, 41 rotating shafts, 42 motors, 420 motor output shafts, 5 air sources, 6 gap plates, 60 set screws, 61 output connectors, 62 connector air sources

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings.

Example one

Please refer to fig. 1, which is a multi-channel annulus plugging simulation experiment device according to an embodiment of the present invention, including an intermediate container 1, a first holder 2, a second holder 3 and an air source 5;

the intermediate container 1 comprises a simulated well bore 10 and a joint 12, the simulated well bore 10 is provided with an open end and a closed end, the joint 12 comprises a connecting pipeline 120, an end cover 121 and a gas source joint 122, one end of the connecting pipeline 120 is communicated with one open end of the simulated well bore 10, the other end of the connecting pipeline is sealed by the end cover 121, a central through hole of the end cover 121 is communicated with the first gas source joint 122, the end cover 121 is opened to add leakage blocking liquid into the simulated well bore 10, and after the end cover 121 is covered, pressurized gas can be introduced into the simulated drill cylinder through the first gas source joint 122 on the end cover 121; the gas source 5 is used for providing required pressure for the multi-channel annulus plugging simulation experiment device, is an existing conventional component, and comprises a gas cylinder and a manifold assembly in a QD-2A type high-pressure plugging material experiment instrument;

the first holder 2 is fixed on the side wall of the upper end of the simulated shaft 10 in the vertical direction, and the second holder 3 is fixed on the side wall of the lower end of the simulated shaft 10 in the vertical direction;

the first clamping device 2 comprises a first clamping pipeline 20, a first valve 21 and a first channel assembly 22 which are communicated with an opening at the upper end of the side wall of the simulated shaft 10, one end of the first clamping pipeline 20 is communicated with the opening correspondingly formed in the side wall of the simulated shaft 10, the other end of the first clamping pipeline extends along the flow direction of the plugging fluid, and the first clamping pipeline 21 and the first channel assembly 22 are sequentially communicated;

the first multi-channel assembly 22 comprises at least two first slit pipelines 221, at least two slit plates 6, at least two output connectors 61 and at least two air source connectors 62, one end of each first slit pipeline 221 is combined into a pipeline and is communicated with the corresponding first clamping pipeline 20 of the first multi-channel assembly, and the other end of each first slit pipeline 221 extends outwards along the leakage-stopping liquid flow direction and is sequentially communicated with one slit plate 6, one output connector 61 and one air source connector 62; specifically, the slit plate 6 is detachably connected to the first slit pipe 221, the output connector 61 can collect and measure the leakage liquid passing through the slit plate 6, and the second gas source connector 62 on the first slit pipe 221 is used for reversely discharging the experimental device.

The second clamping device 3 comprises a second clamping pipeline 30 communicated with the lower end opening of the side wall of the simulated shaft 10, a second valve 31 and a second multi-channel assembly 32, and the second valve 31 and the second multi-channel assembly 32 are sequentially fixed along the flow direction of the leakage-stopping liquid and communicated with the second clamping pipeline 30; the structure of the second multi-channel assembly 32 is the same as that of the first multi-channel assembly 22, and therefore, the description thereof is omitted.

The first holder 4 can simulate the leakage condition above the real well, and the second holder 5 can simulate the leakage condition at the bottom of the real well and evaluate the gap leakage stopping effect.

Example two

Please refer to fig. 1, fig. 2, and fig. 3 for a further implementation of the first embodiment.

The middle container 1 further comprises a simulation drill barrel 11 with one open end and the other closed end, the open end of the simulation drill barrel 11 is rotatably connected to the inner wall of the open end of the simulation shaft 10, the closed end of the simulation drill barrel 11 is rotatably connected to the inner wall of the closed end of the simulation shaft 10, an annular space is reserved between the simulation shaft 10 and the simulation drill barrel 11, and the side wall of the closed end of the simulation drill barrel 11 is provided with an annular opening 110.

The multichannel annulus plugging simulation experiment device further comprises a stirring device 4, wherein the stirring device 4 comprises stirring blades 40, a rotating shaft 41 and a motor 42, the stirring blades 40 are uniformly fixed on the rotating shaft 41, the stirring blades 40 are spirally sleeved on the rotating shaft 41, the spiral direction of the stirring blades is opposite to the rotating direction of the rotating shaft 41, and specifically, the stirring blades 40 have flowing guidance for enabling fluid to flow to the closed end of the simulation drill cylinder 11 during operation, so that the simulation plugging fluid flows to an annular opening at the lower part of the simulation drill cylinder 11 in the simulation drill cylinder 11 and then flows to an annulus between the simulation drill cylinder 10 and the simulation drill cylinder 11, and the plugging fluid flows in the annuluses of the simulation drill cylinder 11 and the simulation drill cylinder 10; one end of the rotating shaft 41 is coaxially fixed on the output shaft 420 of the motor 42, the other end of the rotating shaft passes through the center of the closed end of the simulated shaft 10 and the center of the closed end of the simulated drill barrel 11 in sequence and extends into the simulated drill barrel 11, the rotating shaft 41 is rotatably connected with the simulated shaft 10, the rotating shaft 41 is coaxially fixed with the simulated drill barrel 11, and the motor 42 is fixed on the outer wall of the closed end of the simulated shaft 10. The stirring device 4 can drive the simulation drill barrel 11, the stirring blade 40 and the rotating shaft 41 to rotate, and the working state during petroleum drilling can be simulated more truly.

EXAMPLE III

To further implement the second embodiment, please refer to fig. 2 and fig. 3, specifically, the intermediate container 1 further includes a first coupling 100 and a second coupling 101, the first coupling 100 includes a first ring 1000 fixed at the center of the open end of the simulated wellbore 10 and a second ring 1001 capable of rotating relative thereto, the open end of the simulated drill pipe 11 is coaxially fixed on the second ring 1001, the second coupling 101 includes a first disc 1010 fixed at the center of the closed end of the simulated wellbore 10 and a second disc 1011 rotating relative thereto, and the closed end of the simulated drill pipe 11 is coaxially fixed on the second disc 1011. The first ring 1000, the second ring 1001 and the balls or rollers engaged therein constitute an axial contact bearing in the first coupling, and the first disc 1010, the second disc 1011 and the balls or rollers engaged therein constitute an axial contact bearing in the second coupling.

Further, the first coupling 100 and the second coupling 101 are both provided with a dynamic sealing device for rotational movement, the dynamic sealing device can adopt a sealing form combining a contact type oil seal lip 13, a Gla ring 14 and an O-shaped ring seal 15, and one side of the O-shaped seal ring can be additionally provided with a spring to press the O-shaped seal ring against the groove surface of the Gla ring, so that the sealing effect is enhanced, but not limited to the dynamic sealing modes. The rotary dynamic sealing device is arranged to seal the whole middle container, so that unnecessary leakage at the rotary part is ensured during high-pressure leakage stoppage experiments.

Example four

Referring to fig. 4, in a further embodiment of the first embodiment, the slit patterns of the slit plate 7 may be selected from parallel flat slits, wedge-shaped slits, parallel oblique slits, spiral slits, or irregular slits. Specifically, the first multi-channel assembly 22 may be provided with a first slit pipe 221 having three branches, the slit plate 6, the output connector 61 and the air source connector 62 are disposed on the first slit pipe 221 of each branch, the output connector 61 may collect and measure the leakage liquid passing through the slit plate, and the air source connector 62 disposed on the first slit pipe 221 is used for performing the back pressure experiment. The different slit occurrence shapes of each slit plate 6, such as vertical peak, horizontal slit, oblique slit and irregular slit, are used for simulating different types of slits existing in the stratum, the slit plates with different slit structures are installed in the first multi-channel assembly 22, in the figure 4, the situation that three-channel assemblies are arranged on the first multi-channel assembly 22 or the second multi-channel assembly 32 is shown, more channel assemblies can be arranged on the first multi-channel assembly 22, the phenomenon that three or more slits with different occurrence shapes coexist can be realized, and the evaluation of the slit plugging effect of different occurrence shapes can be carried out. Similarly, the second multi-channel assembly 32 can also be provided with three or more channels, so as to realize the evaluation of the fracture plugging effect in different production states.

Referring to fig. 4, further, each of the slit plates 6 is respectively in threaded connection with the connection portion of the first slit pipe 221 and the second slit pipe 321 through a plurality of set screws 60 uniformly arranged along the circumferential direction of the pipes, specifically, threaded holes are formed in the slit plates 6, and threaded grooves are correspondingly formed in both the first slit pipe 221 and the second slit pipe 321. When other types of gap boards except the flush joint gap board are connected, because a plurality of threaded holes and threaded grooves are uniformly arranged along the circumferential direction of the pipeline, the angle of the gap board can be adjusted according to the threaded holes corresponding to the threaded grooves, and simulation experiment data are enriched in different angle gap simulation experiments of the same type of gap board.

In the experiment, after the gap plates with different shapes are installed in the first holder 2 and the second holder 3, the end cover 121 is opened, the leakage blocking liquid is introduced into the simulation drill barrel 11, the end cover 121 is closed, the first valve 21 and the second valve 31 are respectively opened or are simultaneously opened, the gas source valve on the end cover 121 is opened, the pressure is applied to the middle container 1, and the motor 42 is simultaneously started, so that the simulation evaluation of the high-pressure annular leakage blocking effect of the gaps with different shapes and the gaps with different layers can be started.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-channel annulus leakage stoppage simulation experiment device comprises an intermediate container and a gas source, wherein the intermediate container comprises a joint and a simulation shaft, one end of the simulation shaft is open, the other end of the simulation shaft is closed, the joint comprises a connecting pipeline, an end cover and a first gas source joint, one end of the connecting pipeline is communicated with the open end of the simulation shaft, the other end of the connecting pipeline is sealed by the end cover, a central through hole of the end cover is communicated with the first gas source joint, and the gas source supplies pressure gas to the simulation shaft through the joint; its characterized in that, this multichannel annular space leaking stoppage simulation experiment device still includes:

2. The multi-channel annulus leakage stoppage simulation experiment device according to claim 1, wherein each multi-channel assembly comprises at least two gap pipelines, at least two gap plates, at least two output joints and at least two second air source joints, one end of each gap pipeline is converged into one pipeline, the clamping pipelines corresponding to the multi-channel assembly where the gap pipeline is located are communicated, the other end of each gap pipeline is a closed end, each gap pipeline extends outwards along the leakage stoppage liquid flow direction and is sequentially communicated with one gap plate, one output joint and one second air source joint, and each second air source joint is arranged at the closed end of the corresponding gap pipeline.

3. The multi-channel annulus plugging simulation experiment device according to claim 1, wherein the intermediate container further comprises a simulation drill cylinder with one open end and the other closed end, the open end of the simulation drill cylinder is rotatably connected to the inner wall of the open end of the simulation shaft, the closed end of the simulation drill cylinder is rotatably connected to the inner wall of the closed end of the simulation shaft, an annular space is reserved between the simulation shaft and the simulation drill cylinder, and an annular opening is formed in the side wall of the closed end of the simulation drill cylinder.

4. The multi-channel annulus leakage stoppage simulation experiment device according to claim 3, further comprising a stirring device, wherein the stirring device comprises a stirring blade, a rotating shaft and a motor, the stirring blade is spirally sleeved on the rotating shaft, the spiral direction of the stirring blade is opposite to the rotating direction of the rotating shaft, one end of the rotating shaft is coaxially fixed on an output shaft of the motor, the other end of the rotating shaft sequentially penetrates through the center of the closed end of the simulation shaft and the center of the closed end of the simulation drill cylinder and extends into the simulation drill cylinder, the rotating shaft is rotationally connected with the simulation shaft, the rotating shaft is coaxially fixed with the simulation drill cylinder, and the motor is fixed on the outer wall of the closed end of the simulation shaft.

5. The multi-channel annulus plugging simulation experiment device according to claim 4, wherein the simulation drill cylinder is rotationally coupled with the simulation wellbore seal, and the rotating shaft is rotationally coupled with the simulation wellbore seal.

6. The multi-channel annulus plugging simulation experiment device according to claim 2, wherein the fracture occurrence of the fracture plate is selected from parallel flat fractures, wedge-shaped fractures, parallel inclined fractures, spiral fractures or irregular fractures.

7. The multi-channel annulus plugging simulation experiment device according to claim 2, wherein the connection part of each slit plate and the slit pipeline is in threaded connection with a plurality of fastening screws uniformly arranged along the circumferential direction.