CN-117386317-B - Choke manifold for controlling oil jacket blowout and control method thereof

CN117386317BCN 117386317 BCN117386317 BCN 117386317BCN-117386317-B

Abstract

The invention relates to a choke manifold for controlling oil jacket open flow and a control method thereof, comprising an internal control pipeline, a pipeline five-way pipeline, a first pipeline four-way pipeline, a second pipeline four-way pipeline, a third pipeline four-way pipeline, a fourth pipeline four-way pipeline, a fifth pipeline four-way pipeline and a sixth pipeline four-way pipeline, wherein the choke manifold is a novel choke manifold composed of a conventional choke manifold, two manual choke valves, six flat valves, two four-way pipelines and a flange nipple joint, the filter manifold is of a double-channel structure, each channel is controlled by the manual choke valves and the manual flat valves, and the middle is directly arranged. The invention greatly improves the safety coefficient of field operation, realizes the requirements of energy conservation, emission reduction and consumption reduction and environmental protection, effectively solves the construction problems in the process of gas well pressure relief, well killing and water absorption index measurement, has strong practicability and operability, prolongs the service life of the manifold, and improves the throttling effect of the manifold.

Inventors

TIAN WEI
Zhuang Jujin
SUN FUJIN
LI YONGGANG
ZHANG QIANG
CAI XIAODONG

Assignees

中石化石油工程技术服务股份有限公司
中石化江汉石油工程有限公司
中石化江汉石油工程有限公司井下测试公司

Dates

Publication Date: 20260505
Application Date: 20230615

Claims (5)

1. A throttle manifold for controlling oil jacket blowout, characterized by comprising an inner control pipeline (1), a pipeline five-way valve (6), a first pipeline four-way valve (14), a second pipeline four-way valve (22), a third pipeline four-way valve (23), a fourth pipeline four-way valve (25), a fifth pipeline four-way valve (28) and a sixth pipeline four-way valve (29), wherein the inner control pipeline is connected with the pipeline five-way valve (6) through a first manual flat gate valve (2), the pipeline five-way valve (6) is also connected with a third manual flat gate valve (5), a fourth manual flat gate valve (7) and a sixth manual flat gate valve (10), the third manual flat gate valve (5) is connected with the first manual throttle four-way valve (3) through a second hand flat gate valve (4), the first manual throttle (3) is connected with the second pipeline four-way valve (22) through a seventh manual flat gate valve (11), the fourth manual throttle flat gate valve (7) is connected with a fourth manual flat gate valve (9) through a fifth manual flat gate valve (8), and the fourth manual throttle flat gate valve (9) is connected with the sixth pipeline (20) through a thirteenth manual flat gate valve (29); The first pipeline four-way joint (14) is further connected with an eighth manual flat gate valve (13), a ninth manual flat gate valve (15) and an eleventh manual flat gate valve (18), the eighth manual flat gate valve (13) is connected with a third manual throttling gate valve (12), the third manual throttling gate valve (12) is connected with a third pipeline four-way joint (23) through a tenth manual flat gate valve (17), the ninth manual flat gate valve (15) is connected with a fourth manual throttling gate valve (16), the fourth manual throttling gate valve (16) is connected with a fifth pipeline four-way joint (28) through a twelfth manual flat gate valve (19), and the eleventh manual flat gate valve (18) is connected with the fourth pipeline four-way joint (25); The fourth pipeline four-way joint (25) is further connected with a fifteenth manual flat gate valve (24), a sixteenth manual flat gate valve (26) and a seventeenth manual flat gate valve (27), the fifteenth manual flat gate valve (24) is connected with the third pipeline four-way joint (23), the sixteenth manual flat gate valve (26) is used for connecting an oil pipe outlet, and the seventeenth manual flat gate valve (27) is connected with the fifth pipeline four-way joint (28); the fifth pipeline four-way (28) is connected with the sixth pipeline four-way (29), the sixth pipeline four-way (29) is further connected with an eighteenth manual flat gate valve (30), the third pipeline four-way (23) is connected with the second pipeline four-way (22), the second pipeline four-way (22) is further connected with a fourteenth manual flat gate valve (21), and the fourteenth manual flat gate valve (21) is used for being connected with a circulation tank.
2. The choke manifold for controlling the blowout of oil jackets as set forth in claim 1, wherein each of the manual choke valve, each of the piping four-way, the piping five-way, and the flange nipple are provided with connecting flanges on both sides.
3. The choke manifold for controlling the blowout of an oil jacket as set forth in claim 2, wherein the connecting flange has a sealing rim groove on a contact surface thereof, and the two flanges are sealed by a rim.
4. The choke manifold for controlling the blowout of oil jackets as set forth in claim 2, wherein eight through holes are uniformly distributed on the connecting flange, and the two connecting flanges are fastened by connecting bolts.
5. A control method for controlling a choke manifold for controlling an oil jacket blowout of a fluid in accordance with claim 1, comprising the steps of: 1) when the oil pipe and the sleeve need emergency pressure relief and blowout, and the outlet of the sleeve needs separator feeding, the outlet of the oil pipe enters a circulation tank from an internal control pipeline (1), a first manual flat gate valve (2), a pipeline five-way valve (6), a fourth manual flat gate valve (7), a fifth manual flat gate valve (8), a second manual throttle gate valve (9), a thirteenth manual flat gate valve (20), an eighteenth manual flat gate valve (30) and separator burning and discharging treatment, and from a sixteenth manual flat gate valve (26), a fourth pipeline four-way valve (25), an eleventh manual flat gate valve (18), a first pipeline four-way valve (14), an eighth manual flat gate valve (13), a third manual throttle gate valve (12), a tenth manual flat gate valve (17), a third pipeline four-way valve (23), a second pipeline four-way valve (22), a fourteenth manual flat gate valve (21); 2) When the oil pipe and the sleeve need emergency pressure relief and blowout, and the oil pipe outlet needs to enter the separator, the oil pipe outlet is processed by the steps of an inner control pipeline (1), a first manual flat gate valve (2), a pipeline five-way valve (6), a third manual flat gate valve (5), a second manual flat gate valve (4), a first manual throttle gate valve (3), a seventh manual flat gate valve (11), a second pipeline four-way valve (22), a fourteenth manual flat gate valve (21) and enter a circulating tank, and the oil pipe outlet is processed by the steps of a sixteenth manual flat gate valve (26), a fourth pipeline four-way valve (25), an eleventh manual flat gate valve (18), a first pipeline four-way valve (14), a ninth manual flat gate valve (15), a fourth manual throttle gate valve (16), a twelfth manual flat gate valve (19), a fifth pipeline four-way valve (28), a sixth pipeline four-way valve (29) and an eighteenth manual flat gate valve (30) and enter the separator; 3) And the first manual throttling gate valve (3), the second manual throttling gate valve (9), the third manual throttling gate valve (12) and the fourth manual throttling gate valve (16) are respectively adjusted to adjust the discharge capacity of the sleeve outlet or the oil pipe outlet, so that the bottom hole pressure is ensured to be slightly larger than the stratum pressure, the balance of a shaft is maintained, and the overflow, the leakage and the blowout danger are prevented.

Description

Choke manifold for controlling oil jacket blowout and control method thereof Technical Field The invention relates to the field of oil and gas well operation, in particular to a choke manifold for controlling oil jacket blowout and a control method thereof. Background During workover operation, the oil-gas well needs to be provided with various well control devices to ensure the well control safety of the construction site. The choke manifold is particularly important in practical application, and can achieve the purposes of throttling circulation, pressure relief, diversion blowout and control of wellhead back pressure. At present, the conventional choke manifold is adopted for the workover operation of the oil and gas well in the northwest work area, and has the following problems that the choke pressure of an oil pipe and a sleeve annular space cannot be simultaneously released under the abnormal condition of ①, the choke pressure release speed is low, ② cannot throttle to control the size and the trend of a discharge opening of the oil pipe, toxic and harmful gas in the oil pipe cannot enter a separator, an outlet of the ③ oil pipe cannot be fixed, a ④ fluid channel is single, a valve is broken, a standby channel is not provided, and the reliability is not strong. Therefore, the problems that an outlet cannot be fixed, the discharge capacity cannot be adjusted, toxic and harmful gases such as hydrogen sulfide cannot be separated and treated during oil pipe blowout are urgently solved. Disclosure of Invention The invention aims to solve the technical problems of providing a choke manifold for controlling oil jacket blowout and a control method thereof, solving a series of problems that the oil gas well is depressurized, well-killing and water absorption index measurement operation needs choke blowout and the like, being beneficial to reducing well control risks, reducing equipment and pipeline installation and improving production efficiency. The technical scheme includes that the choke manifold for controlling the oil jacket to be sprayed comprises an inner control pipeline, a pipeline five-way valve, a first pipeline four-way valve, a second pipeline four-way valve, a third pipeline four-way valve, a fourth pipeline four-way valve, a fifth pipeline four-way valve and a sixth pipeline four-way valve, wherein the inner control pipeline is connected with the pipeline five-way valve through a first manual flat gate valve, the pipeline five-way valve is also connected with a third manual flat gate valve, a fourth manual flat gate valve and a sixth manual flat gate valve, the third manual flat gate valve is connected with a first manual choke gate valve through a second manual flat gate valve, the first manual choke gate valve is connected with the second pipeline four-way valve through a seventh manual flat gate valve, the fourth manual flat gate valve is connected with the second manual choke gate valve through a fifth manual flat gate valve, the fourth manual flat gate valve is connected with the sixth pipeline four-way valve through a thirteenth manual flat gate valve, and the sixth manual flat gate valve is connected with the first pipeline four-way valve; the first pipeline four-way connection is also connected with an eighth manual flat gate valve, a ninth manual flat gate valve and an eleventh manual flat gate valve, the eighth manual flat gate valve is connected with a third manual throttling gate valve, the third manual throttling gate valve is connected with a third pipeline four-way connection through the tenth manual flat gate valve, the ninth manual flat gate valve is connected with a fourth manual throttling gate valve, the fourth manual throttling gate valve is connected with a fifth pipeline four-way connection through a twelfth manual flat gate valve, and the eleventh manual flat gate valve is connected with the fourth pipeline four-way connection; The fourth pipeline four-way is also connected with a fifteenth manual flat gate valve, a sixteenth manual flat gate valve and a seventeenth manual flat gate valve, the fifteenth manual flat gate valve is connected with the third pipeline four-way, the sixteenth manual flat gate valve is used for connecting an oil pipe outlet, and the seventeenth manual flat gate valve is connected with the fifth pipeline four-way; The fifth pipeline four-way is connected with the sixth pipeline four-way, the sixth pipeline four-way is further connected with an eighteenth manual flat gate valve, the third pipeline four-way is connected with the second pipeline four-way, the second pipeline four-way is further connected with a fourteenth manual flat gate valve, and the fourteenth manual flat gate valve is used for being connected with a circulating tank. According to the scheme, connecting flanges are arranged on two sides of each manual throttle gate valve, each pipeline four-way valve, each pipeline five-way valve and each flange nipple. According to the scheme,