阅读说明：本技术 一种喷嘴可更换且可自保温的引射式套管气回收装置 (Injection type sleeve gas recovery device with replaceable nozzle and self-heat-insulation function ) 是由 张兴凯 廖锐全 刘凯 刘自龙 于 2019-12-13 设计创作，主要内容包括：本发明公开了一种喷嘴可更换且可自保温的引射式套管气回收装置,包括下接头、上接头、连接筒、压环和喷嘴,所述连接筒的一端与所述下接头可拆卸连接,所述连接筒的另一端与所述上接头连接,所述下接头、所述连接筒和所述上接头依次形成流通管道,所述连接筒内部由安装腔和压力腔组成,所述压环和所述喷嘴均内置于所述连接筒的安装腔中,所述压环的一侧与所述下接头抵接,所述压环的另一侧与所述喷嘴的一侧抵接,所述压环与所述喷嘴相连通,所述喷嘴的另一侧与所述安装腔抵接,所述喷嘴与所述压力腔相连通；解决了现有技术中喷嘴口径一定,套管气回收装置难以适应不同流量的原油,且引射器上需要安装加热装置,以防止生成水合物堵塞装置的问题。(The invention discloses an injection type sleeve gas recovery device with a replaceable nozzle and a self-heat-insulation function, which comprises a lower connector, an upper connector, a connecting cylinder, a pressure ring and a nozzle, wherein one end of the connecting cylinder is detachably connected with the lower connector, the other end of the connecting cylinder is connected with the upper connector, the lower connector, the connecting cylinder and the upper connector sequentially form a circulating pipeline, the connecting cylinder is internally composed of an installation cavity and a pressure cavity, the pressure ring and the nozzle are both arranged in the installation cavity of the connecting cylinder, one side of the pressure ring is abutted against the lower connector, the other side of the pressure ring is abutted against one side of the nozzle, the pressure ring is communicated with the nozzle, the other side of the nozzle is abutted against the installation cavity, and the nozzle is communicated with the pressure cavity; the problem of among the prior art nozzle bore be certain, sleeve pipe gas recovery unit is difficult to adapt to the crude oil of different flow, and need install heating device on the ejector to prevent to generate hydrate and block up the device is solved.)

1. An injection type sleeve gas recovery device with a replaceable nozzle and self-heat preservation function is characterized by comprising a lower connector, an upper connector, a connecting cylinder, a pressure ring and a nozzle, one end of the connecting cylinder is detachably connected with the lower joint, the other end of the connecting cylinder is connected with the upper joint, the lower joint, the connecting cylinder and the upper joint sequentially form a circulating pipeline, the inside of the connecting cylinder consists of an installation cavity and a pressure cavity, the pressure ring and the nozzle are both arranged in the mounting cavity of the connecting cylinder, one side of the pressure ring is abutted against the lower joint, the other side of the pressing ring is abutted against one side of the nozzle, the pressing ring is communicated with the nozzle, the other side of the nozzle is abutted against the mounting cavity, the nozzle is communicated with the pressure cavity, and the side wall of the connecting cylinder is provided with an air inlet communicated with the circulating pipeline;

the nozzle is characterized in that the connecting cylinder is provided with a first flow passage and a second flow passage, one end of the first flow passage is communicated with the inside of the lower connector, the other end of the first flow passage is communicated with a connecting cavity formed between the connecting cylinder and the upper connector, one end of the second flow passage is communicated with the connecting cavity, and the other end of the second flow passage is communicated with the inlet of the nozzle.

2. The injection type casing gas recovery device with the replaceable nozzle and the self-heat-insulation function according to claim 1, wherein the upper connector is in threaded connection with the connecting cylinder, and the lower connector is in threaded connection with the connecting cylinder.

3. The injection type casing gas recovery device with the replaceable nozzle and the self-heat-insulation function according to claim 1, wherein the number of the first flow passages is multiple, and the multiple first flow passages are parallel to each other and are arranged along the circumferential direction of the connecting cylinder.

4. The injection type casing gas recovery device with the replaceable nozzle and the self-heat-insulation function according to claim 1, wherein the number of the second flow passages is multiple, and the multiple second flow passages are parallel to each other and are arranged along the circumferential direction of the connecting cylinder.

5. The injection type casing gas recovery device with the replaceable and self-heat-insulating nozzle as claimed in claim 1, wherein a mixing cavity is formed between the outer wall of the nozzle and the inner wall of the mounting cavity, one end of the mixing cavity is communicated with the upper joint, and the other end of the mixing cavity is communicated with the gas inlet.

6. The injection type casing gas recovery device with the replaceable nozzle and the self-insulation function according to claim 5, wherein the mixing cavity is conical and is used for storing casing gas.

7. The removable injection type sleeve gas recovery device that can self preservation temperature of nozzle of claim 1, characterized in that, the connecting cylinder still includes at least three sealing washer, the first sealing washer embedded in the seal groove of seting up on the nozzle outer wall, the outer lane of first sealing washer with the inner wall butt of installation cavity, the second sealing washer embedded in the seal groove of seting up on the clamping ring outer wall, the outer lane of second sealing washer with the inner wall butt of installation cavity, the sealing washer of third sealing washer all embedded in the seal groove of seting up on the connecting cylinder outer wall, the outer lane of third sealing washer all with the inner wall butt of top connection.

8. The injection type sleeve gas recovery device with the replaceable nozzle and the self-heat-insulation function according to claim 1, wherein the pressure chamber is in a boss shape, an opening of the pressure chamber close to the nozzle is small, and an opening of the pressure chamber close to the upper joint is large.

9. The injection type casing gas recovery device with the replaceable and self-heat-insulating nozzle as claimed in claim 1, wherein the compression ring comprises a limiting plate and a plurality of conduits, the plurality of conduits are uniformly arranged along the circumferential direction of the limiting plate, the length direction of each conduit is parallel to the length direction of the circulation pipeline, the limiting plate is embedded in the mounting groove, one end of each conduit is abutted to the lower joint, and the other end of each conduit is abutted to the nozzle.

Technical Field

The invention relates to the technical field of casing gas recovery in petroleum engineering, in particular to an injection type casing gas recovery device with a replaceable nozzle and capable of self-insulating.

Background

At present, a large amount of natural gas is dissolved in high-temperature and high-pressure stratum oil to form dissolved gas, and in the production of crude oil, when the flowing pressure of fluid is reduced, oil reservoir fluid flowing in a shaft is separated from gas dissolved in the crude oil and enters an annular space of an oil sleeve to form casing gas. If the casing mouth is sealed up, the natural gas in the casing is not discharged, can influence the pump efficiency of oil-well pump, can cause the oil-well pump airlock even and can't pump oil, has very big influence to crude oil production, and in order to improve the pump efficiency, casing gas will be directly discharged aloft or the burning, but has caused the waste of effective energy to seriously pollute the atmospheric environment, so appear many casing gas recovery units in the market in order to solve the problem of above-mentioned casing gas.

The crude oil flow in different well conditions is greatly different, however, the sleeve gas recovery device on the market is difficult to adjust to the crude oil with different flow because the caliber of the nozzle is fixed, so that the sleeve gas recovery device with different models is required to be equipped in the process of operation, which is not economical and practical, and a heating device is required to be installed on the ejector so as to prevent the hydrate from blocking the device.

Disclosure of Invention

The invention aims to overcome the technical defects, provides the injection type casing gas recovery device with the replaceable nozzle and the self-heat-insulation function, and solves the problems that the nozzle has a certain caliber, the casing gas recovery device is difficult to adapt to crude oil with different flow rates, and a heating device is required to be installed on an injector to prevent a generated hydrate from blocking the device in the prior art.

In order to solve the technical problem, the invention provides an injection type casing gas recovery device with a replaceable nozzle and self-insulation function, which comprises a lower connector, an upper connector, a connecting cylinder, a pressure ring and a nozzle, one end of the connecting cylinder is detachably connected with the lower joint, the other end of the connecting cylinder is connected with the upper joint, the lower joint, the connecting cylinder and the upper joint sequentially form a circulating pipeline, the inside of the connecting cylinder consists of an installation cavity and a pressure cavity, the pressure ring and the nozzle are both arranged in the mounting cavity of the connecting cylinder, one side of the pressure ring is abutted against the lower joint, the other side of the pressing ring is abutted against one side of the nozzle, the pressing ring is communicated with the nozzle, the other side of the nozzle is abutted against the mounting cavity, the nozzle is communicated with the pressure cavity, and the side wall of the connecting cylinder is provided with an air inlet communicated with the circulating pipeline; the nozzle is characterized in that the connecting cylinder is provided with a first flow passage and a second flow passage, one end of the first flow passage is communicated with the inside of the lower connector, the other end of the first flow passage is communicated with a connecting cavity formed between the connecting cylinder and the upper connector, one end of the second flow passage is communicated with the connecting cavity, and the other end of the second flow passage is communicated with the inlet of the nozzle.

The invention has the beneficial effects that: different from the prior art, the lower connector is detachably connected with the connecting cylinder, the pressure ring and the nozzle can be taken out after the pressure ring and the nozzle are disassembled, and the nozzles with different calibers are replaced, so that the device is suitable for oil liquid with different flow rates, and after the sleeve gas entering the circulating pipeline from the air inlet is mixed with the oil liquid in the circulating pipeline, the sleeve gas can be recycled along with the oil liquid discharge, and the oil liquid flows into the connecting cavity from the first flow passage and flows back to the second flow passage, and is finally guided into the nozzle, so that the device can be insulated, the hydrate blockage can be prevented, a heating device does not need to be additionally arranged, and the energy can be saved.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a connector barrel in an embodiment of the present invention;

FIG. 3 is a side view of a connector barrel in an embodiment of the present invention;

FIG. 4 is a schematic view of the construction of a pressure ring according to an embodiment of the present invention;

fig. 5 is a flowchart of the operation of an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

As shown in fig. 1, the invention provides an injection type casing gas recovery device with a replaceable nozzle and a self-heat preservation function, which comprises a lower connector 100, an upper connector 200, a connecting cylinder 300, a pressure ring 400 and a nozzle 500, wherein one end of the connecting cylinder 300 is detachably connected with the lower connector 100, the other end of the connecting cylinder 300 is connected with the upper connector 200, the lower connector 100, the connecting cylinder 300 and the upper connector 200 sequentially form a circulation pipeline, the connecting cylinder 300 is internally composed of an installation cavity 310 and a pressure cavity 320, the pressure ring 400 and the nozzle 500 are both arranged in the installation cavity 310 of the connecting cylinder 300, one side of the pressure ring 400 is abutted against the lower connector 100, the other side of the pressure ring 400 is abutted against one side of the nozzle 500, the pressure ring 400 is communicated with the nozzle 500, the other side of the nozzle 500 is abutted against the installation cavity 310, the nozzle 500 is communicated with the pressure cavity 320, and the side wall.

Wherein, top connection 200 is linked together with producing oil pipe, and lower clutch 100 is linked together with advancing oil pipe, adopts threaded connection between top connection 200 and the connecting cylinder 300, adopts threaded connection between lower clutch 100 and the connecting cylinder 300, and it can be understood that, the connected mode between top connection 200 and the connecting cylinder 300 also can adopt other modes to replace, and also convenient to detach is the excellent, and on the same way, the connected mode between above-mentioned bottom connection 100 and the connecting cylinder 300 can adopt arbitrary quick detach mode to convenient to detach, connect steadily as the excellent.

As shown in fig. 2, the connecting cylinder 300 of the present embodiment is provided with a first flow path 340 and a second flow path 350, one end of the first flow path 340 is communicated with the inside of the lower joint 100, the other end of the first flow path 340 is communicated with the connecting cavity 210 formed between the connecting cylinder 300 and the upper joint 200, one end of the second flow path 350 is communicated with the connecting cavity 210, and the other end of the second flow path 350 is communicated with the inlet of the nozzle 500.

Preferably, the number of the first flow passages 340 is plural, and the plural first flow passages 340 are parallel to each other and arranged along the circumferential direction of the connector barrel 300.

Preferably, the number of the second flow passages 350 is plural, and the plural second flow passages 350 are parallel to each other and arranged along the circumference of the connector barrel 300.

It can be understood that the first flow passage 340 and the second flow passage 350 are uniformly arranged on the connecting cylinder 300 and are arranged in a staggered manner with respect to the air inlet 330, as shown in fig. 3, the arrangement manner of the first flow passage 340 and the second flow passage 350 is a preferable scheme in this example, specifically, oil flows into the connecting cavity 210 from the first flow passage 340, flows back into the second flow passage 350, and is finally introduced into the nozzle 500, so as to perform a heat preservation function on the connecting cylinder 300, prevent hydrate from being generated and blocking the device, and no additional heating device is required, so as to save energy.

A mixing chamber 510 is formed between the outer wall of the nozzle 500 and the inner wall of the mounting chamber 310 in this embodiment, one end of the mixing chamber 510 is communicated with the upper joint 200, and the other end of the mixing chamber 510 is communicated with the air inlet 330.

Preferably, the mixing chamber 510 is tapered for storing cannula gas, it being understood that the shape of the mixing chamber 510 is not limited and is preferably uniform in thickness.

Preferably, a gas flow meter is installed at the gas inlet to meter the casing gas drawn into the connector 300.

Preferably, the connecting cylinder 300 further includes at least three sealing rings, the first sealing ring is embedded in the sealing groove formed in the outer wall of the nozzle 500, the outer ring of the first sealing ring abuts against the inner wall of the mounting cavity 310, the second sealing ring is embedded in the sealing groove formed in the outer wall of the pressing ring 400, the outer ring of the second sealing ring abuts against the inner wall of the mounting cavity 310, the sealing ring of the third sealing ring is embedded in the sealing groove formed in the outer wall of the connecting cylinder 300, and the outer ring of the third sealing ring abuts against the inner wall of the upper joint 200.

Preferably, the pressure chamber 320 has a boss shape, an end of the pressure chamber 320 close to the nozzle 500 is opened small, and an end of the pressure chamber 320 close to the upper joint 200 is opened large, so that when the oil is sprayed from the nozzle 500, the cross section of the flowing pipeline is enlarged to be in butt joint with the upper joint 200, thereby reducing the pressure of the oil.

As shown in fig. 4, the pressure ring 400 in this embodiment includes a limiting plate 410 and a plurality of conduits 420, the plurality of conduits 420 are uniformly arranged along a circumferential direction of the limiting plate 410, a length direction of each conduit 420 is parallel to a length direction of the circulation pipe, the limiting plate 410 is embedded in a mounting groove, one end of each conduit 420 abuts against the lower connector 100, and the other end of each conduit 420 abuts against the nozzle 500.

It should be understood that the shape of the pressing ring 400 is not limited as long as the lower connector 100 and the first flow channel 340, the lower connector 100 and the nozzle 500 can be communicated with each other, and the nozzle 500 is firmly fixed in the mounting chamber 310.

As shown in fig. 5, when the casing gas is not required to be recovered, the casing gas recovery device is closed, and the crude oil can flow into the oil pipeline through the bypass branch pipe.

The working process is as follows: as shown in fig. 5, the upper joint 200 is connected to an oil inlet pipe of an oil pump, oil enters the lower joint 100 and is guided into the nozzle 500 through the guide pipe 420, the oil is ejected at a high speed from the nozzle 500 to generate local low pressure, the sleeve enters the mixing chamber 510 from the air inlet 330 and contacts with the oil, so that the oil is mixed into the oil, and the oil passes through the pressure chamber 320 and the upper joint 200 along with the oil until the oil is extracted, according to the gas flowmeter, when the amount of the sleeve gas is too large or too small, the size of the flow area can be adjusted by replacing nozzles 500 with different sizes, specifically, the lower joint 100 is detached from the connecting cylinder 300, the pressure ring 400 and the nozzle 500 are sequentially detached, the nozzle 500 is replaced, one side of the pressure ring 400 compresses the nozzle 500, the lower joint 100 is mounted on the connecting cylinder 300, and the other side of the pressure ring 400 abuts against the lower joint 100, so that.

Different from the prior art, the lower connector 100 and the connecting cylinder 300 are detachably connected, the pressure ring 400 and the nozzle 500 can be taken out after the pressure ring 400 and the nozzle 500 are disassembled, and the nozzles 500 with different calibers are replaced, so that the oil-water separator is suitable for oil liquid with different flow rates, and the sleeve gas entering the circulating pipeline from the air inlet 330 is mixed with the oil liquid in the circulating pipeline and then discharged along with the oil liquid, and the effect of recycling the sleeve gas is achieved.

It should be noted that the above embodiments belong to the same inventive concept, and the description of each embodiment has a different emphasis, and reference may be made to the description in other embodiments where the description in individual embodiments is not detailed.

The above-mentioned embodiments only express the embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.