CN210564481U

CN210564481U - Automatic defense device for hydrate of deepwater drilling kill line

Info

Publication number: CN210564481U
Application number: CN201921650104.1U
Authority: CN
Inventors: 李远达; 高志成; 王彬; 谢玉芹; 李治儒
Original assignee: Shandong University of Science and Technology
Current assignee: Shandong University of Science and Technology
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2020-05-19
Anticipated expiration: 2029-09-30

Abstract

The utility model discloses an automatic defense device of deep water drilling kill-job pipeline hydrate, including deep water drilling kill-job pipeline part and hydrate automated inspection and defense part. In the oil and gas exploitation process, if hydrate has been generated in the pipeline, the utility model discloses can replace manual sampling detection's mode, save a large amount of artifical complicated procedures and the time that detects. The device can monitor the hydrate generation position in real time in the whole process of oil and gas exploitation, control the pressure and the speed of injection of the hydrate inhibitor, automatically inject the hydrate inhibitor into the hydrate generation position, quickly mix the hydrate inhibitor with produced fluid, clear the produced hydrate and inhibit the generation of the hydrate, and achieve the purpose of hydrate prevention and control. The device has scientific method and meets the precision requirement in the oil and gas exploitation project.

Description

Automatic defense device for hydrate of deepwater drilling kill line

Technical Field

The utility model relates to a hydrate defense device especially relates to a deep water drilling kill-job pipeline hydrate automatic defense device, belongs to the oil and gas exploitation field.

Background

at the same time, the exploitation of deep water oil and natural gas has the problems that ①, the safe period of seabed work is seriously influenced by the generation of hydrate (natural gas hydrate is a compound in an ice and snow coagulation state formed by natural gas under the environment conditions of low temperature and high pressure), ②, if a large amount of natural gas hydrate occurs in the exploitation process, various devices such as pipelines and instruments can be blocked, and the normal work of a drilling well is greatly influenced, and ③, the longer the pipeline is, the larger the influence of the natural gas hydrate is, and the serious influence is brought to the efficiency of oil and natural gas exploitation and the safety of deep water work.

Therefore, it is necessary to develop a safer and more convenient hydrate automatic defense device to prevent the above situations.

Disclosure of Invention

An object of the utility model is to prior art's defect and not enough, provide a deep water drilling kill-job pipeline hydrate automatic defense device to solve the problem of work security, oil and gas exploitation benefit, hydrate defense convenience in the oil and gas exploitation.

In order to solve the problem, the utility model provides a hydrate automated inspection and defense device.

For solving the above technical problem, the utility model discloses a technical scheme is: the automatic hydrate defense device comprises a deepwater drilling kill-job pipeline mechanism and an automatic hydrate detection and defense mechanism, wherein the deepwater drilling kill-job pipeline mechanism consists of a whole shaft part, a kill-job pipeline, a flowing head and a drilling fluid storage pool, and the automatic hydrate detection and defense mechanism comprises an inhibitor adding short joint, a pressure gauge support cylinder, an oil nozzle thermometer, an oil nozzle pressure gauge, an upper computer, an inhibitor adding pump and an inhibitor adding pipeline. The hydrate inhibitor storage tank is connected with an inhibitor adding pump through an inhibitor conveying pipeline, the inhibitor adding pump is respectively connected with an inhibitor injection pump through an inhibitor injection pipeline, the inhibitor adding pump is respectively connected with the inhibitor adding pump through an inhibitor injection pipeline, the inhibitor adding pump is connected with the inhibitor injection pipeline through an inhibitor injection nipple, the inhibitor adding pump is connected with a wellbore through a threaded connection, a pressure gauge support is positioned between a kill line and a blowout preventer, the upper portion and the lower portion of the pressure gauge support are fixedly connected with the wellbore through a threaded connection, a thermometer and a pressure gauge are arranged in the pressure gauge support, the temperature and the pressure of flowing fluid are monitored in real time, data obtained in the pressure gauge support are fed back to an upper computer through a data line, a nozzle thermometer and a nozzle pressure gauge are installed on the upper portion of a flowing head, the kill-job pipeline is connected with the drilling fluid pipeline, and the feedback time of the hydrate automatic detection and defense device is less than 0.2 s.

The utility model discloses beneficial effect does: the automatic hydrate defense device can replace a manual sampling detection mode, and a large amount of complex procedures and time for manual detection are saved. The device can monitor the hydrate generation condition in the oil and gas exploitation process in real time, control the pressure and the speed of the injection of the hydrate inhibitor, automatically inject the hydrate inhibitor into the hydrate generation position, rapidly mix the hydrate inhibitor with the produced fluid, clear the hydrate and inhibit the generation of the hydrate, thereby achieving the purpose of hydrate prevention and control.

Drawings

Fig. 1 is a schematic two-dimensional plan view of the integrated device of the present invention.

Description of reference numerals: 1. a well bore, 2, an inhibitor adding short section, 3, an underwater wellhead, 4, a kill line, 5, a pressure gauge support cylinder, 6, a data transmission line, 7, a blowout preventer, 8, a drill string, 9, a flowing head, 10, a drilling fluid line, 11, a drilling fluid storage tank, 12, a nozzle thermometer, 13, a nozzle pressure gauge, 14. the system comprises an upper computer, 15 total data transmission lines, 16 signal actuators, 17 first signal control lines, 18 second signal control lines, 19 third signal control lines, 20 hydrate inhibitor storage tanks, 21 inhibitor conveying pipelines, 22 first inhibitor adding pumps, 23 second inhibitor adding pumps, 24 third inhibitor adding pumps, 25 first inhibitor adding pipelines, 26 second inhibitor adding pipelines and 27 third inhibitor adding pipelines.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and the following detailed description. It should be understood that the detailed description and specific examples, while indicating the invention, are given by way of illustration only.

Referring to fig. 1, the specific embodiment of the present invention adopts the following technical solutions: the system comprises a deepwater drilling and killing pipeline part and a hydrate automatic detection and defense part.

The deepwater drilling kill line part comprises a shaft 1, an underwater wellhead 3, a kill line 4, a blowout preventer 7, a drill string 8, a flow head 9, a drilling fluid line 10 and a drilling fluid reservoir 11. The kill line 4 is arranged in the direction of an air inlet at the underwater wellhead 3 and contacts 25 meters. The blowout preventer 7 is installed on the casing head of the underwater wellhead 3. The flow head 9 is located at the top of the drill string 8 and is threadedly connected to the drill string 8. The right end of the flow head 9 is connected with a drilling fluid pipeline 10 through a pipe joint, and the other end of the drilling fluid pipeline 10 is connected with a drilling fluid storage pool 11.

The hydrate automatic detection and defense part comprises an inhibitor adding short section 2, a pressure gauge support cylinder 5, a data transmission line 6, a nozzle thermometer 12, a nozzle pressure gauge 13, an upper computer 14, a total data transmission line 15, a signal actuator 16, a first signal control line 17, a second signal control line 18, a third signal control line 19, a hydrate inhibitor storage tank 20, an inhibitor conveying pipeline 21, a first inhibitor adding pump 22, a second inhibitor adding pump 23, a third inhibitor adding pump 24, a first inhibitor adding pipeline 25, a second inhibitor adding pipeline 26 and a third inhibitor adding pipeline 27.

The inhibitor adding short circuit 2 is positioned at the position 600 meters below the underwater wellhead 3 and is in threaded connection with the upper part and the lower part of the shaft 1.

The pressure gauge support 5 is positioned at the lower part of an upper blowout preventer 7 of the kill line 4 and is in threaded connection with the wellbore. The inside of the device contains a thermometer and a manometer, which can monitor the temperature and pressure of the liquid flowing through the device in real time. The pressure gauge supporting cylinder is connected with an upper computer 14 through a data transmission device 6, and transmits the temperature and the pressure which are monitored in real time to the upper computer 14.

The choke thermometer 12 and the choke pressure gauge 13 are arranged on the upper part of the flow head 9, the temperature and the pressure of fluid in the flow head 9 and the drilling fluid pipeline 10 are monitored in real time, and the flow head and the drilling fluid pipeline are connected with an upper computer 14 through a data transmission line 6. The nozzle thermometer 12 and the nozzle pressure gauge 13 respectively transmit the real-time temperature and pressure to the upper computer 14 through the data transmission line 6.

The upper computer 14 is connected with the signal actuator 16 through a total data transmission line 15. The data parameters provided by the upper computer 14 to the signal actuator include the injection rate and the pressure of the hydrate inhibitor.

The hydrate inhibitor storage tank 20 is connected to and supplies an inhibitor to a first inhibitor addition pump 22, a second inhibitor addition pump 23, and a third inhibitor addition pump 24 through an inhibitor transfer line 21.

The signal actuator 16 obtains data parameters provided by the upper computer 14, controls the first inhibitor adding pump 22 through the first signal control line 17, and injects hydrate inhibitor into the inhibitor adding nipple 2 through the first inhibitor adding pipeline 25.

The signal actuator 16 obtains data parameters provided by the upper computer 14, controls a second inhibitor adding pump 23 through a second signal control line 18, and injects hydrate inhibitor into the kill line 4 through a second inhibitor adding line 26.

The signal actuator 16 obtains data parameters provided by the upper computer 14, controls the third inhibitor adding pump 24 through the third signal control line 19, and injects the hydrate inhibitor into the drilling fluid line 10 through the third inhibitor adding line 27.

The utility model discloses a deep water drilling kill-job pipeline hydrate automatic defense device's theory of operation does: in the deep water drilling work, produced petroleum and natural gas flows out through a shaft 1, rises to an inhibitor adding nipple 2, then flows through an underwater tester to reach a pressure gauge support cylinder 5, the pressure gauge support cylinder 5 monitors the temperature and pressure of drilling fluid near a kill line in real time, and acquired data are transmitted to an upper computer 14 through a data transmission line 6; the choke thermometer 12 and the choke pressure gauge 13 monitor the pressure and the temperature of the drilling fluid in the choke flow pipeline in real time, and transmit the acquired data to the upper computer 14 through the data transmission line 6; the upper computer 14 analyzes the obtained data, detects the generation condition of the hydrate, analyzes the position of the hydrate inhibitor to be injected and the pressure and the speed of the hydrate inhibitor, transmits the analysis result to the signal actuator 16 through the total data transmission line 15, and the signal actuator 16 respectively controls the inhibitor adding pump through a first signal control line 17, a second signal control line 18 and a third signal control line 19. If the presence of natural gas hydrates is found downhole, i.e. there is hydrate formation near the inhibitor addition nipple 2, the first inhibitor addition pump 22 is controlled by the signal actuator 16 to inject hydrate inhibitor into that location through the first inhibitor addition line 25; when the generation of hydrate is detected near the pressure gauge support 5, in order to avoid the hydrate blocking the pipeline to cause the pipeline to break, the blowout preventer 7 is automatically closed, the hydrate flows into the kill line 4, the signal actuator 16 controls the second inhibitor adding pump 23, the hydrate inhibitor is injected into the kill line 4 through the second inhibitor adding pipeline 26, when the hydrate at the position is completely cleaned, the blowout preventer 7 is opened, and the drilling continues to work; if significant changes in the values of the surface choke thermometer 12 and choke pressure gauge 13 are found, i.e. hydrates are produced at this location, the hydrate inhibitor is injected into the drilling fluid line 10 through the third inhibitor addition line 27 by controlling the third inhibitor addition pump 24 via the signal actuator 16. The hydrate inhibitors at the three positions are mixed with produced liquid, so that the hydrate is completely cleaned, the generation of the hydrate is inhibited, the pipeline is prevented from being blocked, and the purpose of automatic defense of the hydrate is achieved. In the device, the processing time of all data real-time monitoring, transmission and analysis processing parts is less than 0.2 s.

The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.

Claims

1. The utility model provides a deep water drilling kill-job pipeline hydrate automatic defense device which characterized in that: the device comprises a deepwater drilling kill-job pipeline mechanism and a hydrate automatic detection and defense mechanism, wherein the deepwater drilling kill-job pipeline mechanism consists of a shaft integral part, a kill-job pipeline, a flow head and a drilling fluid storage pool, the hydrate automatic detection and defense mechanism comprises an inhibitor adding short section, a pressure gauge support cylinder, a choke thermometer, a choke pressure gauge, an upper computer, an inhibitor adding pump and a pipeline, the inhibitor adding short section is fixed at a position of 600 meters of an underwater wellhead and is connected with the shaft through threaded connection, the pressure gauge support cylinder is positioned between the kill-job pipeline and a blowout preventer, the upper part and the lower part of the pressure gauge support cylinder are fixedly connected with the shaft through threaded connection, a thermometer and a pressure gauge are arranged in the pressure gauge support cylinder, the choke pressure and the choke pressure of flowing fluid are monitored in real time, the choke pressure gauge and the choke pressure gauge are arranged on the upper part of the flow head, and the pressure gauge support cylinder, the upper computer automatically judges the generation condition of the hydrate according to the obtained data, calculates the pressure and the speed of the hydrate inhibitor to be injected, the hydrate inhibitor storage tank is connected with the inhibitor adding pump through an inhibitor conveying pipeline, the inhibitor adding pump is respectively connected with the inhibitor injection short section, the kill-job pipeline and the drilling fluid pipeline through the inhibitor injection pipeline, and the feedback time of the hydrate automatic detection and defense device is less than 0.2 s.