CN215213466U

CN215213466U - Online detection device for oil well produced liquid

Info

Publication number: CN215213466U
Application number: CN202121333612.4U
Authority: CN
Inventors: 林凌; 袁荔; 王建; 厉昌锋; 林悦文; 朱平; 曹煜
Original assignee: China Petroleum and Chemical Corp; Sinopec Jiangsu Oilfield Co
Current assignee: China Petroleum and Chemical Corp; Sinopec Jiangsu Oilfield Co
Priority date: 2021-06-16
Filing date: 2021-06-16
Publication date: 2021-12-17
Anticipated expiration: 2031-06-16

Abstract

The utility model relates to an oil well liquid production on-line measuring device, the middle part outlet of glib cover is installed the back pressure valve, the lower part outlet of back pressure valve links to each other with gathering pipeline, the inner port of glib cover has screwed the glib talker, the outer port of glib cover is installed the dysmorphism tee bend, the axial entry of dysmorphism tee bend is equipped with the external screw thread and screwed in the internal thread of the outer port of glib cover, the middle part outlet of dysmorphism tee bend has screwed the analyzer outlet joint; the outer end of the oil nozzle is connected with a core pipe in a screwing mode, and the outer end of the core pipe extends outwards along the axis where the axial inlet of the special-shaped tee joint is located and extends to the outer side of the axial outlet of the special-shaped tee joint; the outer wall of the core pipe is connected with a sealing joint in a rotating mode, the middle section of the periphery of the sealing joint is provided with a convex sealing gland, the inner end face of the sealing gland is pressed on the outer end face of the axial outlet of the special-shaped tee joint through a red copper gasket, and the outer end head of the core pipe is connected with an inlet connector of an analyzer in a rotating mode. The device can be used for monitoring and analyzing equipment on line under the condition of not influencing normal production and not welding.

Description

Online detection device for oil well produced liquid

Technical Field

The utility model relates to a wellhead assembly especially relates to a liquid on-line measuring device is produced to oil well belongs to oil field well site technical field.

Background

The production tree is an important device on the ground in the process of exploiting petroleum in oil fields, plays a role in controlling, adjusting, testing petroleum and the like, and comprises a tubing head, a casing head, a production gate, a nipple sleeve, a sleeve pressure gate and the like.

The underground oil flows out of all parts of the Christmas tree and then enters the gathering pipeline after passing through the production gate, the choke sleeve and the back pressure gate. Wherein: the production gate plays a role in cutting off high-pressure fluid in the well; the oil nozzle sleeve is internally provided with oil nozzles with different diameters to control the yield of the pumping well and is communicated with a back pressure valve and a gathering and transportation flow.

In the production process of an oil well, the liquid production capacity of a single well and the gas content and the water content in the single well are important production data, and the data provide important basis for technical departments to adopt corresponding schemes. With the generation of new oil extraction equipment in recent years, such as a mobile online water content analyzer, a mobile closed oil metering device and the like, production data such as the liquid production amount, the water content and the like of an oil well can be obtained more intuitively and accurately, and technical support is provided for oil well analysis.

At present, when a mobile device is used for monitoring the water content and the yield of an oil well, a water content analysis device and oil flow at a wellhead form a series loop, namely wellhead production liquid flowing out of a production valve needs to flow into a back pressure valve and a gathering and transportation process after data analysis is carried out on the production liquid through an analyzer device. In the use of actual well sites, the installation of on-line analytical instrumentation suffers from the following problems:

1. an oil sleeve communication device connected with the casing pressure gate on one side of the Christmas tree controls the gate, more than 80% of the oil sleeve communication device is buried underground, so that the gate is corroded, the switch is not flexible, and the switch is inconvenient.

2. In Jiangsu oil fields, more than 40 percent of pumping wells exist, and due to various reasons, an oil jacket communication device and a control gate are not arranged on one side of a Christmas tree casing pressure gate, namely, a bypass flow does not exist, so that the mobile analysis monitoring equipment cannot be installed and used; so that the actual production condition of the oil well cannot be known, and corresponding measures cannot be taken.

3. For an oil well without a bypass flow, oil flow directly enters a back pressure valve and a gathering flow after flowing out of an oil nozzle sleeve, the on-site distance limitation cannot form series connection with an online analysis instrument, the online analysis instrument needs to be welded again each time, the flow is modified, and the method is unsafe, uneconomical and inconvenient.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the problem that exists among the prior art, provide a liquid on-line measuring device is produced to oil well, under the circumstances that does not influence normal production and do not carry out the welding, can put into use on-line monitoring analytical equipment to the accurate production data such as liquid volume of producing and water content of acquireing provide the guarantee for oil field safety in production.

In order to solve the technical problem, the utility model discloses an online detection device for liquid produced by an oil well, including a nozzle sleeve, a return pressure valve is installed at the middle outlet of the nozzle sleeve, the lower outlet of the return pressure valve is connected with a gathering and transportation pipeline, the inner port of the nozzle sleeve is screwed with a nozzle, the outer port of the nozzle sleeve is installed with a special-shaped tee, the axial inlet of the special-shaped tee is provided with an external thread and screwed in the internal thread of the outer port of the nozzle sleeve, and the middle outlet of the special-shaped tee is screwed with an analyzer outlet joint; the outer end of the oil nozzle is connected with a core pipe in a screwing mode, and the outer end of the core pipe extends outwards along the axis where the axial inlet of the special-shaped tee joint is located and extends to the outer side of the axial outlet of the special-shaped tee joint; the outer wall of the core pipe is connected with a sealing joint in a screwed mode, the middle section of the periphery of the sealing joint is provided with a convex sealing gland, the inner end face of the sealing gland is pressed on the outer end face of the axial outlet of the special-shaped tee joint through a red copper gasket, and the outer end head of the core pipe is connected with an inlet connector of an analyzer in a screwed mode.

As the improvement of the utility model, the analyzer inlet joint links to each other with portable online analyzer's oil inlet through the entry hose, portable online analyzer's oil-out pass through the export hose with analyzer outlet joint links to each other.

Compared with the prior art, the utility model discloses following beneficial effect has been obtained: this device need not to carry out big transformation to choke sleeve and well head flow, and whole installation need not cutting or welding, and very safe swift can the reconversion completely moreover. When the mobile online analyzer is used for other purposes, the inlet connector of the analyzer is directly connected with the outlet connector of the analyzer through the hose, so that the flow can be directly recovered, and the mobile online analyzer can be conveniently connected again.

As a further improvement, the middle part of the oil nozzle is provided with an oil nozzle boss, and the inner end face of the oil nozzle boss and the inner port of the oil nozzle sleeve are provided with a tetrafluoroethylene gasket therebetween. The high-pressure side of the oil nozzle not only realizes the sealing in the circumferential direction through the fine thread full thread section, but also realizes the end face sealing by pressing the tetrafluoroethylene gasket through the boss of the oil nozzle, thereby ensuring the sealing performance of the high-pressure side.

As a further improvement of the utility model, the periphery of the oil nozzle boss is regular hexagon, square or is provided with two cutting planes that are parallel to each other. The oil nozzle is convenient to screw or unscrew in the process of mounting or dismounting the oil nozzle.

As a further improvement of the present invention, an axial outlet of the special-shaped tee is an unthreaded hole, the sealing joint is inserted into the axial outlet of the special-shaped tee, an inner hole of the sealing joint is provided with a sealing joint threaded section and a sealing joint unthreaded hole section, the sealing joint threaded section is located outside the sealing joint unthreaded hole section, at least two O-shaped rings are arranged between the sealing joint unthreaded hole section and the outer wall of the core tube, and the O-shaped rings are respectively embedded in the annular caulking grooves of the core tube; and the internal thread of the sealing joint thread section is screwed with the external thread of the core pipe. After the sealing joint is screwed in place, the O-shaped ring realizes the sealing between the core pipe and the inner wall of the unthreaded hole section of the sealing joint, and the red copper gasket realizes the sealing between the sealing joint and the special-shaped tee joint.

As a further improvement, the inner end of the core tube is provided with an internal thread and is connected with the external thread of the outer end of the oil nozzle in a rotating manner, and the inner end of the core tube is provided with a soft gasket between the outer end faces of the boss of the oil nozzle. The soft gasket can improve the sealing performance between the oil nozzle and the core pipe and can compensate the axial error of the core pipe screwed on the oil nozzle.

As a further improvement, the choke sleeve is installed in the export of production gate, the production gate is installed in the export of well head tee bend, and the well head tee bend is installed in the top of well head tee bend.

Drawings

The invention will be described in further detail with reference to the drawings and the detailed description, which are provided for reference and illustration purposes only and are not intended to limit the invention.

Fig. 1 is the structure schematic diagram of the oil well liquid production on-line detection device of the utility model I.

Fig. 2 is a partially enlarged view of the nipple area in fig. 1.

Fig. 3 is a schematic structural diagram two after wellhead recovery flow.

Fig. 4 is a partially enlarged view of the nipple area in fig. 3.

FIG. 5 is a schematic diagram of the mobile on-line analyzer with the structure removed.

In the figure: 1. a wellhead cross joint; 2. a wellhead tee; 3. producing a gate; 4. an oil nozzle sleeve; 5. a nozzle tip; 5a, a nozzle boss; a tetrafluoroethylene gasket; 5c, soft gasket; 6. a special tee joint; 7. a core tube; 7a.O shaped ring; 8. sealing the joint; 8a, sealing gland; 9. a red copper pad; 10. an analyzer inlet fitting; 11. an inlet hose; 12. a mobile online analyzer; 13. an outlet hose; 14. an analyzer outlet fitting; 15. a back pressure valve; 16. a gathering and transportation pipeline; 17. a plug; 18. directly connecting the hose.

Detailed Description

As fig. 1, fig. 2 shows, the utility model discloses a liquid on-line measuring device is produced to oil well includes the production tree, the production tree includes well head cross 1, well head tee bend 2 is installed to well head cross 1 top, production gate 3 is installed in well head tee bend 2's export, glib talker cover 4 is installed in production gate 3's export, back pressure valve 15 is installed in glib cover 4's middle part export, back pressure valve 15's lower part export links to each other with gathering pipeline 16, glib cover 4's inner port has connect glib talker 5 soon, dysmorphism tee bend 6 is installed to glib cover 4's outer port, dysmorphism tee bend 6's axial entry is equipped with the external screw thread and connects in the internal thread of the outer port of glib cover 4 soon, dysmorphism tee bend 6's middle part export has connect analysis appearance outlet connection 14 soon.

The outer end of the oil nozzle 5 is screwed with the core tube 7, and the outer end of the core tube 7 extends outwards along the axial line where the axial inlet of the special-shaped tee joint 6 is located and extends to the outer side of the axial outlet of the special-shaped tee joint 6; the outer wall of the core tube 7 is screwed with a sealing joint 8, the middle section of the periphery of the sealing joint 8 is provided with a convex sealing gland 8a, the inner end face of the sealing gland 8a is pressed on the outer end face of the axial outlet of the special-shaped tee joint 6 through a red copper gasket 9, and the outer end of the core tube 7 is screwed with an analyzer inlet joint 10; the analyzer inlet connector 10 is connected with an oil inlet of a mobile online analyzer 12 through an inlet hose 11, and an oil outlet of the mobile online analyzer 12 is connected with an analyzer outlet connector 14 through an outlet hose 13.

High-pressure oil of 35MPa enters a production gate 3 from a wellhead tee joint 2 of a Christmas tree, enters an inlet of a nozzle sleeve 4 from the production gate 3, is throttled by a central hole of a nozzle 5, the pressure is reduced to 4MPa, enters an inner cavity of a core pipe 7 from the central hole of the nozzle 5, enters a mobile online analyzer 12 from an analyzer inlet joint 10 and an inlet hose 11, after production data such as liquid production amount, water content and the like are tested by the mobile online analyzer 12, the oil enters an inner cavity of a special-shaped tee joint 6 through an outlet hose 13 and an analyzer outlet joint 14, enters the inner cavity of the nozzle sleeve 4 along an annular channel between the periphery of the core pipe 7 and the special-shaped tee joint 6, and enters a gathering and transportation pipeline 16 from a middle outlet of the nozzle sleeve 4 through a back-pressure valve 15.

The device does not need to greatly reform the flow of the oil nozzle sleeve 4 and a well mouth, during installation, only a plug of an outer port of the oil nozzle sleeve 4 needs to be screwed off, a traditional oil nozzle is replaced by a special oil nozzle of the device, then a core pipe 7 is screwed at the outer end of an oil nozzle 5, then a special-shaped tee joint 6 is sleeved on the periphery of a mandrel, external threads of an axial inlet of the special-shaped tee joint are screwed into the outer port of the oil nozzle sleeve 4, then a sealing joint 8 is continuously sleeved on the periphery of the core pipe 7, the sealing joint 8 is screwed with threads on the periphery of the core pipe 7 until a sealing gland 8a at the middle section of the periphery of the sealing joint 8 presses a red copper gasket 9 on the outer port of the special-shaped tee joint 6, and sealing between the periphery of the core pipe 7 and the special-shaped tee joint 6 is realized; and finally, an analyzer inlet connector 10 is screwed on the outer end of the core pipe 7, and an analyzer outlet connector 14 is arranged at the middle inlet of the special-shaped tee joint 6. The whole installation process does not need cutting or welding, and is very safe and quick.

The middle part of the oil nozzle 5 is provided with an oil nozzle boss 5a, and a tetrafluoroethylene gasket 5b is arranged between the inner end surface of the oil nozzle boss 5a and the inner end opening of the oil nozzle sleeve 4. The high-pressure side of the oil nozzle not only realizes the sealing in the circumferential direction through the fine thread full thread section, but also realizes the end face sealing by pressing the tetrafluoroethylene gasket 5b through the boss 5a of the oil nozzle, thereby ensuring the sealing performance of the high-pressure side.

The periphery of the oil nozzle boss 5a is in a regular hexagon shape or a square shape or is provided with two cutting planes which are parallel to each other, so that the oil nozzle 5 can be conveniently screwed or unscrewed in the installation or disassembly process.

The axial outlet of the special-shaped tee joint 6 is an unthreaded hole, the sealing joint 8 is inserted into the axial outlet of the special-shaped tee joint 6, the inner hole of the sealing joint 8 is provided with a sealing joint threaded section and a sealing joint unthreaded hole section, the sealing joint threaded section is positioned on the outer side of the sealing joint unthreaded hole section, at least two O-shaped rings 7a are arranged between the sealing joint unthreaded hole section and the outer wall of the core tube 7, and the O-shaped rings 7a are respectively embedded in the annular caulking grooves of the core tube 7; the internal thread of the thread section of the sealing joint is screwed with the external thread of the core tube 7. After the sealing joint 8 is screwed in place, the O-shaped ring 7a realizes the sealing between the core tube 7 and the inner wall of the unthreaded hole section of the sealing joint, and the red copper gasket 9 realizes the sealing between the sealing joint 8 and the special-shaped tee joint 6.

The inner end of the core tube 7 is provided with an internal thread and is screwed with the external thread of the outer end of the oil nozzle, and a soft gasket 5c is arranged between the inner end of the core tube 7 and the outer end face of the boss 5a of the oil nozzle. The soft gasket 5c can improve the sealing performance between the oil nipple 5 and the core tube 7 and can compensate the axial error of the core tube 7 screwed on the oil nipple 5.

As shown in fig. 3 and 4, after the sealing joint 8, the special-shaped tee 6 and the core tube 7 are sequentially detached, the plug is screwed on the outer port of the oil nozzle sleeve 4, so that the original flow can be completely recovered, and the method is quite safe and rapid.

As shown in fig. 5, when the mobile on-line analyzer 12 is to be used for other purposes, the analyzer inlet connector 10 and the analyzer outlet connector 14 are directly connected by the direct connection hose 18, so that the flow can be directly recovered and the mobile on-line analyzer 12 can be easily reconnected.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention. In addition to the above embodiments, the present invention may have other embodiments. All the technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope claimed by the present invention. The undescribed technical features of the present invention can be realized by or using the prior art, and are not described herein again.

Claims

1. The utility model provides an oil well liquid production on-line measuring device, includes the glib talker cover, the middle part export of glib talker cover is installed and is pressed back the valve, the lower part export of pressing back the valve links to each other with gathering pipeline, the inner port of glib talker cover has connect glib talker, its characterized in that soon: the outer port of the oil nozzle sleeve is provided with a special-shaped tee joint, an axial inlet of the special-shaped tee joint is provided with external threads and is screwed in the internal threads of the outer port of the oil nozzle sleeve, and a middle outlet of the special-shaped tee joint is screwed with an outlet connector of an analyzer; the outer end of the oil nozzle is connected with a core pipe in a screwing mode, and the outer end of the core pipe extends outwards along the axis where the axial inlet of the special-shaped tee joint is located and extends to the outer side of the axial outlet of the special-shaped tee joint; the outer wall of the core pipe is connected with a sealing joint in a screwed mode, the middle section of the periphery of the sealing joint is provided with a convex sealing gland, the inner end face of the sealing gland is pressed on the outer end face of the axial outlet of the special-shaped tee joint through a red copper gasket, and the outer end head of the core pipe is connected with an inlet connector of an analyzer in a screwed mode.

2. The on-line detection device for oil well production liquid according to claim 1, wherein the analyzer inlet joint is connected with the oil inlet of the mobile on-line analyzer through an inlet hose, and the oil outlet of the mobile on-line analyzer is connected with the analyzer outlet joint through an outlet hose.

3. The on-line detection device for oil well liquid production according to claim 1, wherein a nozzle boss is arranged in the middle of the nozzle, and a tetrafluoroethylene gasket is arranged between the inner end face of the nozzle boss and the inner port of the nozzle sleeve.

4. The on-line detection device for oil well produced liquid according to claim 3, wherein the outer periphery of the oil nozzle boss is in a regular hexagon shape, a square shape or two cutting planes which are parallel to each other.

5. The online detection device for oil well production fluid according to claim 1, wherein the axial outlet of the special-shaped tee is an optical hole, the sealing joint is inserted into the axial outlet of the special-shaped tee, an inner hole of the sealing joint is provided with a sealing joint threaded section and a sealing joint optical hole section, the sealing joint threaded section is positioned outside the sealing joint optical hole section, at least two O-shaped rings are arranged between the sealing joint optical hole section and the outer wall of the core pipe, and the O-shaped rings are respectively embedded in the annular embedding grooves of the core pipe; and the internal thread of the sealing joint thread section is screwed with the external thread of the core pipe.

6. The online detection device for oil well liquid production according to claim 3, wherein the inner end of the core tube is provided with internal threads and is screwed with the external threads of the outer end of the oil nozzle, and a soft gasket is arranged between the inner end of the core tube and the outer end face of the boss of the oil nozzle.

7. The on-line detection device for the liquid production of the oil well as recited in any one of claims 1 to 6, wherein the nozzle sleeve is installed at the outlet of a production gate, the production gate is installed at the outlet of a wellhead tee, and the wellhead tee is installed above a wellhead tee.