CN-122014210-A - Device and method for monitoring integrity of produced water reinjection well shaft

CN122014210ACN 122014210 ACN122014210 ACN 122014210ACN-122014210-A

Abstract

The invention relates to the field of wellbore monitoring equipment, in particular to equipment and a method for monitoring the integrity of a produced water reinjection well wellbore, wherein the equipment comprises a monitor, a mounting piece A, a rack, a base, a control assembly and a dust removal assembly; the invention moves the monitor by the control component, moves the monitor gradually downwards along the annular track movement of the inner side and the outer side of the back-injection well shaft of the produced water, can comprehensively monitor the conditions of the inner side and the outer side of the back-injection well shaft of the produced water by using a single monitoring device, saves the early purchase cost of the monitoring device, avoids the monitoring dead angle, is beneficial to finding potential problems in time, can access an external water source by cleaning a spray head at the inner side of a cavity during stay, washes the outer side of the monitor after pressurizing the water source, ensures the accuracy of next monitoring data, and saves the later maintenance cost of the monitoring device.

Inventors

CHEN ZHIYONG
LIU JUN
CHEN WEI
WEI LEI
WANG YONGMING
ZHONG JIBIN
CHEN GANG
AN RAN

Assignees

中国石油天然气股份有限公司

Dates

Publication Date: 20260512
Application Date: 20241108

Claims (7)

1. The produced water reinjection well shaft integrity monitoring equipment comprises a monitor (1) and is characterized by further comprising a mounting part A (2), a frame (3), a base (4), a control assembly and a dedusting assembly, wherein the upper end of the monitor (1) is provided with the frame (3), the middle position of a top beam of the frame (3) is provided with the control assembly for controlling the monitor (1) to move, the control assembly comprises a rotating motor (501), a round control disc (502) is arranged at the lower end of an output shaft of the rotating motor (501), an elongated operating frame (503) is fixedly connected to the inner side of the control disc (502), a servo motor (504) is arranged on the inner side of the operating frame (503) close to one end of the control disc (502), a threaded rod and a threaded sleeve (505) are arranged at the output end of the servo motor (504), the threaded rod and the lower end of the threaded sleeve (505) are connected with a movable frame (506), a telescopic cylinder (507) is arranged on the inner side of the movable frame (506), the control assembly and the monitor (1) is fixedly arranged through the mounting part A (2), the lower side of a left support rod and the right support rod of the frame (3) is fixedly connected with the base (4), the support rod (3), the right support rod is fixedly connected to the inner side of the frame (3), the inner side of the frame (3) is fixedly connected with the end of the monitor (1), one end is provided with a cleaning cavity (601) and a cleaning cavity (601) is arranged on the inner side of the cleaning cavity (601) and a cleaning cavity 601 An air dryer (604) is arranged at the right end of the cleaning cavity (601), and a water storage cavity (605) is arranged at the right end of the lower end of the cleaning cavity.
2. The produced water reinjection well shaft integrity monitoring device according to claim 1, characterized in that the control assembly and the monitor (1) are fixedly installed through a mounting piece B (7).
3. The produced water reinjection well shaft integrity monitoring device is characterized in that a mounting piece B (7) comprises a hanging frame (701), an adjusting sleeve (702), clamping rods (703), a positioning plate (704), positioning grooves (705), limiting holes (706), limiting rods (707) and thrust springs (708), the hanging frame (701) is of a U-shaped structure, the adjusting sleeve (702) is fixedly connected to the left end and the right end of the hanging frame (701), the clamping rods (703) are connected to the inner side of the adjusting sleeve (702) in a threaded mode, the positioning plates (704) are arranged on the inner side of the hanging frame (701), the positioning grooves (705) are formed in the left end and the right end of the positioning plate (704), clamping blocks of the clamping rods (703) are matched with the shapes of the positioning grooves (705), the limiting rods (707) which are symmetrical in the front-back mode are fixedly connected to one side of the clamping blocks of the hanging frame (701), the limiting holes (706) which are symmetrical in the front-back mode are formed in the left side and the right side of the hanging frame (701), the limiting rods (706) are connected to the inner side of the limiting rods (703) in a sliding mode, and the outer side of the clamping rods (703) are provided with the springs (708) which are used for preventing the clamping rods (703) from shifting.
4. The produced water reinjection well shaft integrity monitoring device is characterized in that storage grooves (8) are formed in four corners of the lower end of a base (4), a control cylinder (9) is fixedly connected to the upper end of the storage grooves (8), a ground pin (10) is fixedly connected to the lower end of a piston rod of the control cylinder (9), and the ground pin (10) is located inside the storage grooves (8).
5. The produced water reinjection well shaft integrity monitoring device is characterized in that a long-strip-shaped track groove (11) is formed in the upper end face of a base (4), a sliding rod (12) is fixedly connected to the inner side of the track groove (11), a sliding seat (13) provided with sliding holes matched with the sliding rod (12) is connected to the outer side of the sliding rod (12) in a sliding mode, a locking plate (14) is fixedly connected to the outer side of the sliding rod (12), positioning hole groups (15) distributed in parallel are formed in the upper end of the base (4), and threaded holes of the positioning hole groups (15) are connected with threaded holes of the locking plate (14) in a positioning mode through fixing bolts.
6. The produced water reinjection well shaft integrity monitoring device according to claim 1, characterized in that the dust removal assembly further comprises a guide plate (602) and a drain hole (606), the guide plate (602) for recovering dripping dirty water is arranged at the lower end of the cleaning cavity (601), and the drain hole (606) with a sealing plug is arranged at the right end of the water storage cavity (605).
7. A method of monitoring a production water reinjection well wellbore integrity monitoring apparatus, characterized by comprising a production water reinjection well wellbore integrity monitoring apparatus according to any one of claims 1-6, comprising the steps of: The first step of preparation work, namely installing a monitor (1) on an installation piece A (2) at the lower end of a control assembly, locking the monitor and the installation piece A by using fixing bolts at four corners, transporting a stand (3) to a produced water reinjection well shaft area, correcting the position of the stand (3) so that a top beam of the stand (3) is positioned at the upper end of the produced water reinjection well shaft, arranging left and right support columns of the stand (3) on two sides of the produced water reinjection well shaft, and stably supporting a base (4) in contact with the ground near the produced water reinjection well shaft; The second step starts the monitoring equipment, namely, a worker remotely controls a control assembly to move the position of the monitor (1), firstly, a rotating motor (501) is started to drive a control panel (502) to rotate, the monitor (1) at the lower end of linkage moves in an annular track on the inner side of a produced water reinjection well shaft, a telescopic cylinder (507) on the inner side of a movable frame (506) pushes the monitor (1) to move downwards gradually, after the condition monitoring on the inner side of the produced water reinjection well shaft is finished, the telescopic cylinder (507) is driven to lift the monitor (1), a servo motor (504) drives a threaded rod and a threaded sleeve (505) to start to operate, a lower end part is controlled to move outwards, the position of the monitor (1) is adjusted well, then the annular track is moved on the outer side of the produced water reinjection well shaft and moves downwards gradually, the condition on the inner side of the produced water reinjection well shaft is monitored, and the sensors and data arranged in the monitor (1) after the movement can monitor the related pressure, temperature and flow parameters of the well shaft in real time, so that the subsequent analysis and the evaluation of the running state of the well shaft can be performed; And the later maintenance of the monitoring equipment comprises the steps that after the monitoring of the produced water reinjection well shaft by the monitor (1) is completed, the monitor (1) is reset, the reset position of the monitor (1) is the inner side of the dust removal component, during the stay period, the water spray head (603) on the inner side of the cleaning cavity (601) can be connected with an external water source, the water source is pressurized and then the outer side of the monitor (1) is washed, and the residual water drops of the monitor (1) are timely dried by the air dryer (604) on the side surface, so that the accuracy of the next monitoring data is ensured.

Description

Device and method for monitoring integrity of produced water reinjection well shaft Technical Field The invention relates to the field of wellbore monitoring equipment, in particular to equipment and a method for monitoring wellbore integrity of a produced water reinjection well. Background The well integrity is a solution for comprehensively applying technology, operation and organization management to reduce the risk of uncontrollable leakage of formation fluid in the whole life cycle of an oil-gas well, and is characterized in that an effective well screen is required to be established in each well shaft stage, the well integrity management is mainly realized by acquiring information related to the well integrity through testing, monitoring and the like, integrating and integrating, carrying out risk assessment on hazard factors possibly causing the well failure, carrying out well integrity assessment in a targeted manner, and formulating reasonable management system and technical measures for preventing and treating the occurrence of accidents of the oil-gas well. But the general fixed point of current supervisory equipment is installed at the interior outer wall of produced water reinjection well pit shaft, because pit shaft environment is complicated, often has certain limitation to the monitoring, appears dead angle blind area easily, and when the monitoring point is monitored in the cloth accuse, the equipment installation degree of difficulty is also bigger to the monitoring point of arranging is many, so very big promotion monitoring cost. Therefore, aiming at the problems that dead angle blind areas are easy to occur in the monitoring and the cost of monitoring equipment is high, the equipment and the method for monitoring the integrity of the produced water reinjection well shaft can be designed. Disclosure of Invention In order to overcome the dead angle blind area easily appears in the monitoring, the high problem of monitoring facilities cost. The technical scheme is that the equipment for monitoring the integrity of a shaft of a produced water reinjection well comprises a monitor, a mounting piece A, a frame, a base, a control component and a dust removal component, wherein the upper end of the monitor is provided with the frame, the middle position of a top beam of the frame is provided with the control component for controlling the monitor to move, the control component comprises a rotating motor, the lower end of an output shaft of the rotating motor is provided with a round control disc, the inner side of the control disc is fixedly connected with a strip-shaped operation frame, one end, close to the control disc, of the inner side of the operation frame is provided with a servo motor, the output end of the servo motor is provided with a threaded rod and a threaded sleeve, the lower ends of the threaded rod and the threaded sleeve are fixedly connected with a movable frame, the inner side of the movable frame is provided with a telescopic cylinder, the control component is fixedly arranged between the control component and the monitor through the mounting piece A, the lower side of a left support rod and the right support rod of the frame is fixedly connected with the base, the inner side of the right support rod of the frame is provided with the dust removal component for cleaning the surface of the monitor, the cleaning cavity is provided with a water spray head near the front end of the inner side of the cleaning cavity, the right end of the cleaning cavity is provided with an air dryer, and the right end of the cleaning cavity is provided with a water storage cavity. And compared with the mounting part A which is directly fixed by using a bolt, the mounting part B adopts a split structure which is convenient to detach, so that the monitoring equipment can be switched and used more quickly and conveniently without detaching the whole structure, thereby reducing the operation time and greatly improving the flexibility and adaptability of the operation. The mounting piece B comprises a hanging frame, an adjusting sleeve, clamping rods, positioning plates, positioning grooves, limiting holes, limiting rods and thrust springs, wherein the hanging frame is of a U-shaped structure, the adjusting sleeves are fixedly connected to the left end and the right end of the hanging frame, the clamping rods are connected to the inner sides of the adjusting sleeves in a threaded mode, the positioning plates are arranged on the inner sides of the hanging frame, the positioning grooves are formed in the left end and the right end of the positioning plates, clamping rod clamping blocks are matched with the positioning grooves in shape, the limiting rods which are symmetrical front and back are fixedly connected to one side of each clamping rod clamping block close to the hanging frame, the limiting holes which are symmetrical front and back are formed in the left side and the right side of the hanging fr