CN116427888A

CN116427888A - Device for plugging, injecting and removing plugging of oil-gas field shaft

Info

Publication number: CN116427888A
Application number: CN202310576885.9A
Authority: CN
Inventors: 张永进; 陈威
Original assignee: Shaanxi Wanpulong Oil And Gas Technology Service Co ltd
Current assignee: Shaanxi Wanpulong Oil And Gas Technology Service Co ltd
Priority date: 2023-05-22
Filing date: 2023-05-22
Publication date: 2023-07-14

Abstract

The invention discloses a device for plugging an oil-gas field shaft by filling acidolysis, which comprises a connecting pipe, a second hard pipe, a lifting mechanism and a slip ring, wherein the connecting pipe is connected with the lifting mechanism; a liquid storage tank is fixed in the connecting pipe, the bottom of the liquid storage tank is communicated with a first hard pipe, a second hard pipe is sleeved on the outer side of the first hard pipe in a sliding manner, the lower end of the second hard pipe extends to the outer side of the connecting pipe and is communicated with a spray head, and a spiral groove is formed in the outer wall of the second hard pipe; the lifting mechanism is arranged at the bottom of the liquid storage tank, the output end of the lifting mechanism is connected with a sleeve, the sleeve is sleeved on the outer side of the second hard tube, a sliding block is fixed on the inner wall of the sleeve, and the sliding block is clamped in the spiral groove in a sliding way; the slip ring sleeve is fixed on the outer wall of the second hard tube, the slip ring is slidably clamped in the annular groove, and the annular groove is formed in the inner wall of the lower end of the connecting tube. When the blockage on the inner wall of the shaft is pickled, the horizontal rotary spraying can be realized after the spray head is driven to move upwards or downwards for a certain distance, and compared with the traditional spiral spraying, the device has the advantages of no spraying dead angle and uniform spraying.

Description

Device for plugging, injecting and removing plugging of oil-gas field shaft

Technical Field

The invention relates to the technical field of oil and gas field exploitation, in particular to a device for plugging and acidolysis of a shaft of an oil and gas field.

Background

An oil and gas field refers to the sum of reservoirs, reservoirs within the same area controlled by a single local building unit. If there is only a reservoir within this local architecture, it is called an oilfield; only gas reservoirs, known as gas fields.

In the processes of well drilling, well completion, well logging, perforation, fracturing, oil extraction and well repair, the oil and gas well inevitably causes external fluid to enter the reservoir, and a series of injuries are easily caused to the reservoir. If the external working fluid entering the reservoir contains solid-phase particles which invade the reservoir, the reservoir can be blocked in a large probability range, and the output of an oil and gas well is influenced, so that the blocked well bore needs to be unblocked, and the purpose of increasing the output is achieved.

The existing dredging measures are divided into physical blocking removal and chemical blocking removal, wherein the chemical blocking removal measures are mainly to carry out blocking injection and blocking removal through an acid washing mode, a drill rod (or an oil pipe) is generally adopted in the blocking injection and blocking removal process, an acid solution is sprayed out while moving in a shaft, the track of an acid blocking removal agent sprayed out by the high-pressure rotary spraying tool is a spiral line, the spiral line has the problem of uneven spraying dead angle spraying, and for certain blocking serious positions, the downward spiral spraying process tends to cause insufficient spraying times and spraying areas of the part, so that the blocking removal effect is general.

Disclosure of Invention

The invention aims to provide a device for plugging and injecting acidolysis for a well bore of an oil-gas field, so as to solve the problems of the background technology.

The technical scheme of the invention is as follows: a device for plugging and injecting acidolysis of a well bore of an oil-gas field comprises a connecting pipe, a second hard pipe, a lifting mechanism and a slip ring; the connecting pipe is internally fixed with a liquid storage tank, the bottom of the liquid storage tank is communicated with a first hard pipe, the first hard pipe and the connecting pipe are concentrically arranged, a second hard pipe is slidably sleeved outside the lower part of the first hard pipe, the lower end of the second hard pipe extends to the outside of the connecting pipe and is communicated with a spray head, and a spiral groove is formed in the outer wall of the second hard pipe, which is close to one side of the first hard pipe; the lifting mechanism is arranged at the bottom of the liquid storage tank, the output end of the lifting mechanism is connected with a sleeve for driving the sleeve to lift, the sleeve is sleeved on the outer side of the second hard tube, a sliding block is fixed on the inner wall of the sleeve, and the sliding block is clamped in the spiral groove in a sliding way; the slip ring sleeve is fixed on the outer wall of the second hard tube, the slip ring is slidably clamped in the annular groove, and the annular groove is formed in the inner wall of the lower end of the connecting tube.

Preferably, the lifting mechanism comprises a first hydraulic cylinder and an annular plate; the first hydraulic cylinder is fixed at one side of the bottom of the liquid storage tank and is electrically connected with a controller arranged outside the shaft; the annular plate is sleeved on the outer side of the first hard tube, the top of the annular plate is fixed with the moving end of the first hydraulic cylinder, and the bottom of the annular plate is fixed with the top of the sleeve through the connecting rod.

Preferably, the top of the liquid storage tank is connected with the output end of a high-pressure water pump outside the shaft through a conveying hose, and the input end of the high-pressure water pump is connected with a storage tank for storing pickling solution.

Preferably, the first hard tube is provided with an electromagnetic valve, and the electromagnetic valve is electrically connected with the controller.

Preferably, a sealing ring is arranged at the inner wall of the upper port of the second hard tube, and the sealing ring is in sliding sealing connection with the outer wall of the first hard tube.

Preferably, the second hard tube is provided with a horizontal telescopic component on the side wall of the outer side of the connecting tube, and the output end of the horizontal telescopic component is connected with at least one scraper.

Preferably, the horizontal telescopic assembly comprises a mounting box, a second hydraulic cylinder, a conical block and at least one first sliding rod; the mounting box is sleeved and fixed on the second hard tube; the second hydraulic cylinder is fixed on the inner top surface of the mounting box and is electrically connected with the controller; the conical block is sleeved on the second hard pipe, the conical block is reversely arranged, the top of the conical block is fixed with the moving end of the second hydraulic cylinder, at least one first sliding rod is clamped in the through groove and is in sliding connection with the through groove, the through groove is horizontally formed in the side wall of the mounting box, one end of the first sliding rod, which is positioned in the mounting box, is fixed with a mounting rack, the mounting rack is opposite to the side wall of the conical block, rollers are arranged on the side wall of the conical block and are in contact with the conical block, a plurality of horizontally arranged first springs are connected to the side wall of the mounting rack opposite to the conical block, the other end of each first spring is fixed with the inner wall of the mounting box, and one end of the first sliding rod, which is positioned outside the mounting box, is connected with the scraper.

Preferably, the first slide bar is just to the mounting groove that the level set up has been seted up to the one end of scraper, is provided with pressure sensor on the inner wall of mounting groove, pressure sensor with the controller electricity is connected, and sliding connection has the second slide bar in the mounting groove, and the one end that the second slide bar is located the mounting groove is connected with the inner wall of mounting groove through a plurality of second springs, and the one end that the second slide bar is located the mounting groove is outside with the scraper is fixed.

Compared with the prior art, the invention has the beneficial effects that:

1. when the blockage on the inner wall of the shaft is pickled, the horizontal rotary spraying can be realized after the spray head is driven to move upwards or downwards for a certain distance, compared with the traditional spiral spraying, the device has the advantages of no spraying dead angle and uniform spraying, and can perform multiple rotary spraying in the place where the blockage is serious.

2. The horizontal telescopic component provided by the invention can shrink the scraper during pickling, and extend the scraper after pickling, so that the scraper is used for scraping the plug on the inner wall of the shaft, and the dredging effect is improved.

Drawings

FIG. 1 is a schematic view of a front cross-sectional structure of the present invention;

FIG. 2 is a schematic view of a partial enlarged structure of the portion A in FIG. 1 according to the present invention;

FIG. 3 is a schematic view of the doctor blade of the present invention in an extended configuration;

fig. 4 is a schematic view of a partial enlarged structure at B in fig. 3 according to the present invention.

Detailed Description

The following describes in detail the embodiments of the present invention with reference to fig. 1 to 4. In the description of the invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate describing the invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second" may include one or more such features, either explicitly or implicitly; in the description of the invention, unless otherwise indicated, the meaning of "a plurality" is two or more.

Example 1

As shown in fig. 1 to 4, an embodiment of the present invention provides a device for plugging and injecting acidolysis for a well bore of an oil and gas field, comprising a connecting pipe 1, a second hard pipe 3, a lifting mechanism and a slip ring 5; the connecting pipe 1 internal fixation has liquid reserve tank 2, and the bottom intercommunication of liquid reserve tank 2 has first hard tube 21, and first hard tube 21 sets up with connecting pipe 1 is concentric, its characterized in that still includes: the second hard tube 3 is sleeved on the outer side of the lower part of the first hard tube 21 in a sliding way, the lower end of the second hard tube 3 extends to the outer side of the connecting tube 1 and is communicated with a spray head 31, and a spiral groove 32 is formed in the outer wall of one side, close to the first hard tube 21, of the second hard tube 3; the lifting mechanism is arranged at the bottom of the liquid storage tank 2, the output end of the lifting mechanism is connected with a sleeve 4 for driving the sleeve 4 to lift, the sleeve 4 is sleeved on the outer side of the second hard tube 3, a sliding block 41 is fixed on the inner wall of the sleeve 4, and the sliding block 41 is slidably clamped in the spiral groove 32; the slip ring 5 is sleeved and fixed on the outer wall of the second hard tube 3, the slip ring 5 is slidably clamped in the annular groove 51, and the annular groove 51 is formed in the inner wall of the lower end of the connecting tube 1.

When the pipe is cleaned, the connecting pipe 1 is put into a shaft and moves downwards, when the pipe is moved to a blocking section for pickling, the lifting mechanism is controlled to keep the current position of the connecting pipe 1 still, then pickling liquid stored in the liquid storage tank 2, such as hydrochloric acid, is conveyed into the spray head 31 through the first hard pipe 21 and the second hard pipe 3 and sprayed out, meanwhile, the lifting mechanism is controlled to drive the sleeve 4 to lift reciprocally, the sleeve 4 drives the second hard pipe 3, the slip ring 5 and the spray head 31 to synchronously move downwards in the descending process of the sleeve 4, after the bottom of the slip ring 5 is contacted with the annular groove 51, the second hard pipe 3 cannot move downwards continuously, due to the existence of the spiral groove 32, when the lifting mechanism continues to drive the sleeve 4 to move downwards, the spiral groove 32 is extruded through the slip block 41, so that the second hard pipe 3, the slip ring 5 and the spray head 31 rotate forwards, the pickling solution is enabled to be sprayed through the horizontal circumferential rotation of the spray head 31, so that uniform pickling is carried out on the inner wall of the lower side of a certain section of the current shaft, when the sliding block 41 moves downwards to the lower end of the spiral groove 32, the lifting mechanism drives the sleeve 4 to move upwards, the second hard tube 3, the sliding ring 5 and the spray head 31 are driven to synchronously move upwards through the sliding block 41 in the process of upwards moving the sleeve 4, after the top of the sliding ring 5 is contacted with the annular groove 51, the second hard tube 3 cannot continue to move upwards, due to the existence of the spiral groove 32, when the lifting mechanism continues to drive the sleeve 4 to move upwards, the spiral groove 32 is extruded through the sliding block 41, the second hard tube 3, the sliding ring 5 and the spray head 31 are enabled to reversely rotate, so that the pickling solution is sprayed through the horizontal circumferential rotation of the spray head 31, and uniform pickling is carried out on the inner wall of the upper side of a certain section of the current shaft, by controlling the height of the annular groove 51 to be equal to twice the height of the slip ring 5, the spray head 31 can be controlled to horizontally rotate and acid wash the inner walls of the upper side and the lower side of a section of a shaft when the lifting mechanism drives the lifting process once, the upper side and the lower side of an acid washing area are close together, no acid washing dead angle exists, and when the acid washing of the inner wall of the section of the shaft is finished, the lifting mechanism drives the connecting pipe 1 to move downwards to acid wash the next section.

Example 2

The present embodiment defines the structure of a lifting mechanism on the basis of embodiment 1, specifically, as shown in fig. 1, the lifting mechanism includes a first hydraulic cylinder 61 and an annular plate 62; the first hydraulic cylinder 61 is fixed at one side of the bottom of the liquid storage tank 2, and the first hydraulic cylinder 61 is electrically connected with a controller arranged outside the shaft; the annular plate 62 is sleeved on the outer side of the first hard tube 21, the top of the annular plate 62 is fixed with the moving end of the first hydraulic cylinder 61, and the bottom of the annular plate 62 is fixed with the top of the sleeve 4 through the connecting rod 63.

When the sleeve 4 is required to be driven to lift by the lifting mechanism, the piston rod of the first hydraulic cylinder 61 is controlled by the controller to reciprocate, so that the annular plate 62 is driven to vertically move up and down, and the sleeve 4 is driven to synchronously move by the connecting rod 63 in the moving process of the annular plate 62.

Further, as shown in fig. 1, in order to be able to replenish the pickling solution into the tank 2, the top of the tank 2 is connected to the output end of a high-pressure water pump outside the well bore through a delivery hose 22, and the input end of the high-pressure water pump is connected to a tank for storing the pickling solution.

Further, in order to control the pickling process, the first hard tube 21 is provided with the electromagnetic valve 23, the electromagnetic valve 23 is electrically connected with the controller, the electromagnetic valve 23 is controlled to be opened by the controller during pickling, and the pickling solution in the liquid storage tank 2 is delivered into the spray head 31 through the first hard tube 21 and the second hard tube 3 and sprayed out by the pressure generated by the high-pressure water pump.

Furthermore, in order to prevent the pickling solution from leaking out of the gap between the second hard tube 3 and the first hard tube 21 and simultaneously maintain the seal and prevent the pressure from leaking when the second hard tube 3 is driven to move up and down and rotate by the upgrade assembly, a sealing ring 33 is disposed at the inner wall of the upper port of the second hard tube 3, and the sealing ring 33 is in sliding sealing connection with the outer wall of the first hard tube 21.

Example 3

According to the embodiment, on the basis of the embodiment 1, in order to scrape dirt on a well shaft after pickling, a horizontal telescopic component is arranged on the side wall of the second hard pipe 3, which is positioned outside the connecting pipe 1, at least one scraper 7 is connected to the output end of the horizontal telescopic component, the scraper 7 is contracted and does not contact with the inner wall of the well shaft when the connecting pipe 1 moves downwards to perform pickling through the horizontal telescopic component, and when the connecting pipe 1 is pulled upwards after pickling is finished, the scraper 7 is stretched through the horizontal telescopic component to contact with the inner wall of the well shaft, so that the dirt on the inner wall of the well shaft is scraped.

Further, as shown in fig. 1 to 4, the horizontal telescopic assembly comprises a mounting box 8, a second hydraulic cylinder 81, a conical block 82 and at least one first slide bar 83; the mounting box 8 is sleeved and fixed on the second hard tube 3; the second hydraulic cylinder 81 is fixed on the inner top surface of the mounting box 8, and the second hydraulic cylinder 81 is electrically connected with the controller; the conical block 82 is sleeved on the second hard pipe 3, the conical block 82 is reversely arranged, the top of the conical block 82 is fixed with the moving end of the second hydraulic cylinder 81, at least one first sliding rod 83 is clamped in a through groove 84 and is in sliding connection with the through groove 84, the through groove 84 is horizontally arranged on the side wall of the mounting box 8, one end of the first sliding rod 83 located in the mounting box 8 is fixedly provided with a mounting frame 85, the mounting frame 85 faces the side wall of the conical block 82 and is provided with a roller 86, the roller 86 is in contact with the conical block 82, the side wall of the mounting frame 85 opposite to the conical block 82 is connected with a plurality of horizontally arranged first springs 87, the other end of each first spring 87 is fixed with the inner wall of the mounting box 8, and one end of the first sliding rod 83 located outside the mounting box 8 is connected with the scraper 7.

The telescopic operation of utilizing the horizontal telescopic component to control scraper 7 is, keep the position unchanged after the control second pneumatic cylinder 81 stretches to drive toper piece 82 to move down a certain distance, because toper piece 82 moves down the in-process of moving, its diameter is being reduced, therefore under the elastic force of first spring 87, can make mounting bracket 85 drive gyro wheel 86 and first slide bar 83 move to the inboard direction of install box 8, thereby shrink scraper 7, make it be located the inboard of connecting pipe 1, in the process of going down the well and carrying out the pickling, scraper 7 can not contact with the wall of a well, after the pickling finishes, drive toper piece 82 through controller control second pneumatic cylinder 81 shrink and keep the position unchanged after a certain distance, because toper piece 82 moves up the in-process, its diameter is being increased, consequently, can squeeze gyro wheel 86 through toper piece 82, and drive the outside direction removal to install box 8 through gyro wheel 86, thereby stretch out scraper 7 and the wall of a well contact, and when upwards taking out connecting pipe 1, elevating system also can work, drive the hard tube 3 and carry out the rotation of second hard tube 3, thereby can rotate 3 and carry out the synchronous rotation of the second hard tube 3 because of carrying out the second hard tube is fixed on the second hard tube, thereby, the scale is carried out the second is washed 3.

Further, as shown in fig. 2 and 4, in order to control the extension length of the scraper 7, when the scraper 7 contacts with the inner wall of the shaft, the extension state of the scraper 7 can be immediately stopped to avoid being blocked on the wall of the shaft, so that a mounting groove 91 horizontally arranged at one end of the first sliding rod 83 opposite to the scraper 7 is provided, a pressure sensor 92 is provided on the inner wall of the mounting groove 91, the pressure sensor 92 is electrically connected with the controller, a second sliding rod 93 is slidably connected in the mounting groove 91, one end of the second sliding rod 93 located in the mounting groove 91 is connected with the inner wall of the mounting groove 91 through a plurality of second springs 94, and one end of the second sliding rod 93 located outside the mounting groove 91 is fixed with the scraper 7.

When the controller controls the second hydraulic cylinder 81 to shrink to drive the conical block 82 to move upwards, the conical block 82 is utilized to extrude the extrusion roller 86, and the roller 86 is utilized to drive the installation frame 85 and the first sliding rod 83 to move towards the outer side direction of the installation box 8, as the second sliding rod 93 is slidably arranged in the installation groove 91 formed in the first sliding rod 83 and is connected with the inner wall of the installation groove 91 through the plurality of second springs 94, the second sliding rod 93 and the scraper 7 are pushed to move outwards through the plurality of second springs 94 in the moving process of the first sliding rod 83, the plurality of second springs 94 are extruded and touch the pressure sensor 92 after the scraper 7 contacts with the well wall, so that the pressure sensor 92 detects a pressure value, when the pressure value reaches a preset value, a signal is sent to the controller, and after receiving the signal, a command is sent to the second hydraulic cylinder 81, so that the second hydraulic cylinder 81 stops stretching, the current height is kept unchanged, and the current elongation state of the scraper 7 is kept.

The foregoing disclosure is only illustrative of the preferred embodiments of the present invention, but the embodiments of the present invention are not limited thereto, and any variations within the scope of the present invention will be apparent to those skilled in the art.

Claims

1. The utility model provides a be used as oil gas field pit shaft to block up annotate acidolysis device of blocking up, includes connecting pipe (1), connecting pipe (1) internal fixation has liquid reserve tank (2), and the bottom intercommunication of liquid reserve tank (2) has first hard tube (21), and first hard tube (21) set up with connecting pipe (1) are concentric, its characterized in that still includes:

the second hard pipe (3) is sleeved on the outer side of the lower part of the first hard pipe (21) in a sliding manner, a spray head (31) is communicated with the outer side of the connecting pipe (1) extending from the lower end of the second hard pipe (3), and a spiral groove (32) is formed in the outer wall of one side, close to the first hard pipe (21), of the second hard pipe (3);

the lifting mechanism is arranged at the bottom of the liquid storage tank (2), the output end of the lifting mechanism is connected with a sleeve (4) for driving the sleeve (4) to lift, the sleeve (4) is sleeved on the outer side of the second hard pipe (3), a sliding block (41) is fixed on the inner wall of the sleeve (4), and the sliding block (41) is clamped in the spiral groove (32) in a sliding way;

the sliding ring (5) is sleeved and fixed on the outer wall of the second hard tube (3), the sliding ring (5) is slidably clamped in the annular groove (51), and the annular groove (51) is formed in the inner wall of the lower end of the connecting tube (1).

2. An apparatus for plugging an oil and gas field wellbore in accordance with claim 1 wherein said lifting mechanism comprises:

the first hydraulic cylinder (61) is fixed at one side of the bottom of the liquid storage tank (2), and the first hydraulic cylinder (61) is electrically connected with a controller arranged outside the shaft;

the annular plate (62) is sleeved on the outer side of the first hard tube (21), the top of the annular plate (62) is fixed with the moving end of the first hydraulic cylinder (61), and the bottom of the annular plate (62) is fixed with the top of the sleeve (4) through the connecting rod (63).

3. Device for plugging and de-plugging of oil and gas field wellbores according to claim 2, characterized in that the top of the tank (2) is connected with the output of a high pressure water pump outside the wellbores by means of a delivery hose (22), the input of which is connected with a storage tank for storing pickling solution.

4. A device for plugging and de-plugging of a well bore in an oil and gas field according to claim 3, wherein the first hard tube (21) is provided with a solenoid valve (23), the solenoid valve (23) being electrically connected to the controller.

5. The device for plugging and plug-in removal of oil and gas field wellhole according to claim 4, wherein a sealing ring (33) is arranged at the inner wall of the upper port of the second hard tube (3), and the sealing ring (33) is in sliding sealing connection with the outer wall of the first hard tube (21).

6. Device for plugging and de-plugging of oil and gas field wellbores according to claim 2, characterized in that the side wall of the second hard tube (3) outside the connecting tube (1) is provided with a horizontal telescopic assembly, the output end of which is connected with at least one scraper (7).

7. An apparatus for plugging an oil and gas field wellbore in accordance with claim 6 wherein said horizontal telescoping assembly comprises:

the mounting box (8) is sleeved and fixed on the second hard tube (3);

the second hydraulic cylinder (81) is fixed on the inner top surface of the mounting box (8), and the second hydraulic cylinder (81) is electrically connected with the controller;

the conical block (82) is sleeved on the second hard pipe (3), the conical block (82) is arranged in an inverted mode, the top of the conical block (82) is fixed with the moving end of the second hydraulic cylinder (81),

at least one first slide bar (83), clamping in logical inslot (84) and with logical inslot (84) sliding connection, logical inslot (84) level is offered on the lateral wall of mounting box (8), and one end that first slide bar (83) are located mounting box (8) is fixed with mounting bracket (85), is equipped with gyro wheel (86) on the lateral wall that mounting bracket (85) just is to taper piece (82), gyro wheel (86) with taper piece (82) contact is connected with first spring (87) that a plurality of levels set up on the lateral wall that mounting bracket (85) were facing away from taper piece (82), the other end of every first spring (87) with the inner wall of mounting box (8) is fixed, and one end that first slide bar (83) are located outside mounting box (8) is connected with scraper (7).

8. The device for plugging and plug-in removal of oil and gas field wellhole according to claim 7, wherein a horizontal installation groove (91) is formed at one end of the first sliding rod (83) opposite to the scraper (7), a pressure sensor (92) is arranged on the inner wall of the installation groove (91), the pressure sensor (92) is electrically connected with the controller, a second sliding rod (93) is slidably connected in the installation groove (91), one end of the second sliding rod (93) located in the installation groove (91) is connected with the inner wall of the installation groove (91) through a plurality of second springs (94), and one end of the second sliding rod (93) located outside the installation groove (91) is fixed with the scraper (7).