Anti-freezing pressure cock

Abstract

The invention relates to an anti-freezing pressure cock which comprises a needle valve. The upper end of the transition short section is fixedly connected with a pressure transmitter or a pressure gauge, and the lower end of the transition short section is connected to the top end of the needle valve; the conveying mechanism is connected to the bottom end of the needle valve and comprises a protective sleeve and a rubber bag arranged in the protective sleeve, cold-resistant liquid is contained in the rubber bag, and the protective sleeve is communicated with an oil pipeline. Crude oil liquid in the oil pipeline enters and exits from the protective sleeve to enable the rubber bag to deform, and pressure is transmitted to the pressure transmitter or the pressure gauge through the cold-resistant liquid. According to the invention, it can be guaranteed that the cock is not easy to be frozen and blocked at a low temperature, facilities such as a pressure transmitter installed on the cock can normally transmit data, and timeliness and accuracy of data transmission are guaranteed.

Description

Technical Field

[0001] The present invention is a pumping well pressure protection technology, belonging to the oil field mechanical oil well automation equipment pressure change protection technology, and more specifically, relates to an antifreeze type pressure cock. Background Art

[0002] At present, the wellhead data of the pumping well has entered the stage of remote collection. The pressure transmitter and other facilities are easily frozen and blocked due to the influence of temperature in winter. The facilities themselves have no anti-freeze function, and there are no anti-freeze measures at the wellhead of the pumping well. Although the use of cold-resistant liquid isolation to prevent freezing has appeared on site, the production method of the pumping well is up and down strokes, and the pressure difference is large. After a few strokes, the cold-resistant liquid will be lost, and the real anti-freeze effect cannot be achieved.

[0003] Therefore, the prior art needs to be improved. Summary of the invention

[0004] The purpose of the present invention is to solve the problem of the pressure corks being frozen and easily damaged in winter, thereby extending the service life of the pressure corks and enabling facilities such as pressure transmitters installed on the corks to transmit data normally, thereby improving the accuracy and timeliness of remote data transmission.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] According to one aspect of the present invention, there is provided an antifreeze pressure cock, comprising:

[0007] Needle valve;

[0008] A transition nipple, the upper end of which is fixedly connected to a pressure transmitter or a pressure gauge, and the lower end of which is connected to the top of the needle valve; and

[0009] The transmission mechanism is connected to the bottom end of the needle valve, and includes a sheath tube and a rubber bag arranged in the sheath tube. The rubber bag is filled with cold-resistant liquid. The sheath tube is connected to the oil pipeline. The crude oil liquid in the oil pipeline enters and exits the sheath tube to deform the rubber bag and transmit the pressure to the pressure transmitter or pressure gauge through the cold-resistant liquid.

[0010] In one embodiment of the present invention, when the upper end of the transition short section is fixedly connected to the pressure transmitter, the pressure transmitter communicates with the central control room and transmits data information to the central control room; when the upper end of the transition short section is fixedly connected to the pressure gauge, the pressure data information is obtained by checking the reading of the pressure gauge on site.

[0011] In one embodiment of the present invention, the crude oil liquid in the oil pipeline enters and exits the sheath tube based on the pressure of the up and down strokes of the oil pump to continuously squeeze and release the rubber bag.

[0012] In one embodiment of the present invention, a plurality of holes are arranged on the surface of the jacket pipe, and the crude oil liquid in the oil pipeline enters and exits the jacket pipe through the holes.

[0013] In one embodiment of the present invention, the rubber bag is formed integrally with a component connected to the bottom end of the needle valve.

[0014] In one embodiment of the present invention, the top and bottom ends of the needle valve are respectively processed to form a first inner threaded opening and a second inner threaded opening, the lower end of the transition short section is provided with a first outer threaded opening, and the top end of the sheath tube is provided with a second outer threaded opening, the first outer threaded opening is matched and fixedly connected with the first inner threaded opening, and the second outer threaded opening is matched and fixedly connected with the second inner threaded opening.

[0015] In one embodiment of the present invention, the needle valve is a cartridge needle valve or a manually adjustable needle valve.

[0016] In one embodiment of the present invention, the cold-resistant liquid includes at least one of the following: ethanol, ethylene glycol, glycerol, calcium chloride and silicate.

[0017] In one embodiment of the present invention, the sheath tube is made of carbon steel and is matched and fixedly connected to the second inner thread port of the needle valve.

[0018] In one embodiment of the present invention, the upper end of the transition nipple is matched and fixedly connected with a pressure transmitter or a pressure gauge through a conversion joint.

[0019] By adopting the above technical solution, the present invention has the following advantages compared with the prior art:

[0020] The present invention can ensure that the cork is not easily frozen under low temperature conditions, and the pressure transmitter and other facilities installed on the cork can transmit data normally, ensuring the timeliness and accuracy of data transmission. In addition, the present invention reduces the venting steps when replacing facilities such as pressure transmitters, which is beneficial to environmental protection. The antifreeze pressure cork provided by the present invention is a new device equipped in the wellhead process, and will not affect the installation and normal use of other facilities and equipment at the wellhead. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A simplified structural diagram of an antifreeze pressure cock provided by the present invention is shown;

[0022] Figure 2 Shows Figure 1 A schematic diagram of the structure of the sheath pipe;

[0023] Figure 3 A detailed structural schematic diagram of an antifreeze pressure cock provided by the present invention is shown;

[0024] Figure 4 Shows Figure 3 Schematic diagram of the structure of the sheath tube.

[0025] Reference numerals list

[0026] 1 transition short section, 11 first outer thread port, 2 needle valve, 21 first inner thread port, 22 second inner thread port, 3 transmission mechanism, 31 sheath tube, 32 rubber bag, 33 hole, 34 second outer thread port, 35 cold-resistant liquid. DETAILED DESCRIPTION

[0027] It should be understood that the embodiments of the present invention shown in the exemplary embodiments are only illustrative. Although only a few embodiments are described in detail in the present invention, it is easy for those skilled in the art to appreciate that multiple modifications are feasible without actually departing from the teaching of the subject matter of the present invention. Accordingly, all such modifications should be included within the scope of the present invention. Without departing from the gist of the present invention, other replacements, modifications, changes and deletions may be made to the design, operating conditions and parameters of the following exemplary embodiments.

[0028] like Figure 1-4 As shown, the present invention provides an antifreeze type pressure cock, comprising: a needle valve 2; a transition nipple 1, the upper end of which is fixedly connected to a pressure transmitter or a pressure gauge (not shown), and the lower end of the transition nipple 1 is connected to the top of the needle valve 2; and a transmission mechanism 3, which is connected to the bottom end of the needle valve 2, and the transmission mechanism 3 comprises a sheath tube 31 and a rubber bag 32 arranged in the sheath tube 31, the rubber bag 32 is filled with a cold-resistant liquid 35, the sheath tube 31 is connected to an oil pipeline (not shown), and the crude oil liquid in the oil pipeline enters and exits the sheath tube 31 to deform the rubber bag 32 and transmit the pressure to the pressure transmitter or the pressure gauge through the cold-resistant liquid 35.

[0029] Through the above technical scheme of the present invention, the present invention can ensure that the cock is not easily frozen under low temperature conditions, and facilities such as pressure transmitters installed on the cock can transmit data normally, thereby ensuring the timeliness and accuracy of data transmission.

[0030] In the above-mentioned antifreeze pressure cock, when the upper end of the transition short section 1 is fixedly connected to the pressure transmitter, the pressure transmitter communicates with the central control room and transmits data information to the central control room; when the upper end of the transition short section 1 is fixedly connected to the pressure gauge, the pressure data information is obtained by checking the reading of the pressure gauge on site.

[0031] In the above-mentioned antifreeze pressure cock, the crude oil liquid in the oil pipeline enters and exits the sheath tube 31 based on the pressure of the up and down strokes of the oil pump, so that the rubber bag 32 is continuously squeezed and released.

[0032] In the above-mentioned antifreeze pressure cock, if Figure 2 and 4As shown, a plurality of holes 33 are provided on the surface of the jacket pipe 31 , and the crude oil liquid in the oil pipeline enters and exits the jacket pipe 31 through the holes 33 .

[0033] In the above-mentioned antifreeze pressure cock, if Figure 1 and 3 As shown, the protective sleeve 31 protects the rubber bag 32, and the rubber bag 32 is integrated with the component (external thread) connected to the bottom end of the needle valve.

[0034] In the above-mentioned antifreeze pressure cock, if Figure 3 As shown, the top end of the needle valve 2 is processed to form a first inner threaded opening 21, and the bottom end of the needle valve is processed to form a second inner threaded opening 22, the lower end of the transition short section 1 is provided with a first outer threaded opening 11, and the top end of the sheath tube 31 is provided with a second outer threaded opening 34, the first outer threaded opening 11 is matched and fixedly connected with the first inner threaded opening 21, and the second outer threaded opening 34 is matched and fixedly connected with the second inner threaded opening 22.

[0035] In the above-mentioned antifreeze pressure cock, if Figure 1 and 3 As shown, the needle valve 2 is a cartridge needle valve or a manually adjustable needle valve.

[0036] In the above-mentioned antifreeze pressure cock, if Figure 4 As shown, the cold-resistant liquid 35 includes at least one of the following: ethanol, ethylene glycol, glycerin, calcium chloride and silicate.

[0037] In the above-mentioned antifreeze pressure cock, if Figure 2 and 4 As shown, the sheath tube 31 is made of carbon steel and is matched and fixedly connected with the second inner thread port 22 of the needle valve.

[0038] In the above-mentioned antifreeze pressure cock, if Figure 1 As shown, the upper end of the transition nipple 1 is matched and fixedly connected with a pressure transmitter or a pressure gauge through a conversion joint (not shown).

[0039] The above technical solution of the present invention is described in detail below through specific embodiments.

[0040] An antifreeze pressure cock provided by an embodiment of the present invention has a structure as follows: Figure 1-4As shown, it is composed of three parts: a transition nipple 1, a needle valve 2 and a transmission mechanism 3. The transmission mechanism 3 is an important part of the structure. The transmission mechanism 3 has a sheath tube 31 and a rubber bag 32. The rubber bag 32 is located in the sheath tube 31 and forms a whole with the component (external thread) connected to the bottom end of the needle valve to transmit pressure. The crude oil liquid in the oil pipeline continuously squeezes the above structure, forcing the rubber bag 32 in the structure to deform. After the rubber bag 32 is deformed by pressure, the cold-resistant liquid 35 in the rubber bag 32 transmits the pressure to the pressure transmitter or pressure gauge, and transmits the relevant data information to the central control room to prevent the pressure transmitter or pressure gauge from freezing. The antifreeze pressure cock is a new device equipped in the wellhead process, which will not affect the installation and normal use of other facilities and equipment at the wellhead.

[0041] Specifically, Figure 1-4 As shown, an antifreeze pressure cock provided by an embodiment of the present invention comprises: a transition short section 1, a needle valve 2 and a transmission mechanism 3, the top end of the needle valve 2 is processed to form a first inner threaded port 21, and the bottom end is processed to form a second inner threaded port 22, the upper end of the transition short section 1 can be fixedly connected to a pressure transmitter or a pressure gauge, the lower end of the transition short section 1 is provided with a first outer threaded port 11, the first outer threaded port 11 is matched and fixedly connected with the first inner threaded port 21, so that the transition short section 1 is fixed to the top end of the needle valve 2, the transmission mechanism 3 is fixed to the bottom end of the needle valve 2, the transmission mechanism 3 comprises a sheath tube 31 and a rubber bag 32 arranged in the sheath tube 31, the rubber bag 32 is connected to the component ( The outer thread) forms an integral structure, the rubber bag 32 is filled with cold-resistant liquid, the top of the sheath tube 31 is provided with a second outer thread port 34, the second outer thread port 34 is matched and fixedly connected with the second inner thread port 22, and a plurality of holes 33 are provided on the surface of the sheath tube 31, the holes 33 are connected with the oil pipeline, and the crude oil liquid in the oil pipeline enters and exits the sheath tube 31 through the holes 33. Based on the pressure of the up and down strokes of the oil pump, the crude oil liquid continuously enters and exits the sheath tube 31, so that the rubber bag 32 is continuously squeezed and released, and then the pressure is transmitted to the pressure transmitter or pressure gauge through the cold-resistant liquid 35 in the rubber bag 32, and the pressure transmitter transmits the data information to the central control room, and the pressure gauge can check the reading on site.

[0042] The antifreeze pressure cock in the above embodiment of the present invention can ensure that it is not easy to freeze and block under low temperature conditions, and can enable the pressure transmitter or pressure gauge installed on the cock to transmit data normally, ensuring the timeliness and accuracy of data transmission. A total of 80 antifreeze pressure cocks are used in the Hejian oil production area of ​​the third oil production plant, so that the oil well pressure can be transmitted normally from the original inability to transmit.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. If the present invention is modified or replaced by equivalents without departing from the spirit and scope of the present invention, it should be included in the protection scope of the claims of the present invention.

Claims

1. An antifreeze pressure cock, characterized in that: include: Needle valve; A transition nipple, the upper end of which is fixedly connected to a pressure transmitter or a pressure gauge, and the lower end of which is connected to the top of the needle valve; as well as A transmission mechanism is connected to the bottom end of the needle valve, and includes a sheath tube and a rubber bag arranged in the sheath tube, wherein the rubber bag is filled with a cold-resistant liquid, and the sheath tube is connected to an oil pipeline, and the crude oil liquid in the oil pipeline enters and exits the sheath tube to deform the rubber bag and transmit the pressure to a pressure transmitter or a pressure gauge through the cold-resistant liquid.

2. The antifreeze pressure cock according to claim 1, characterized in that: When the upper end of the transition nipple is fixedly connected to the pressure transmitter, the pressure transmitter communicates with the central control room and transmits data information to the central control room; when the upper end of the transition nipple is fixedly connected to the pressure gauge, the pressure data information is obtained by checking the reading of the pressure gauge on site.

3. The antifreeze pressure cock according to claim 1, characterized in that: The crude oil liquid in the oil pipeline enters and exits the sheath pipe based on the pressure of the up and down strokes of the oil pump, so that the rubber bag is continuously squeezed and released.

4. The antifreeze pressure cock according to claim 1, characterized in that: A plurality of holes are arranged on the surface of the jacket pipe, and the crude oil liquid in the oil pipeline enters and exits the jacket pipe through the holes.

5. The antifreeze pressure cock according to claim 1, characterized in that: The rubber bag is integrated with a component connected to the bottom end of the needle valve.

6. The antifreeze pressure cock according to claim 1, characterized in that: The top and bottom ends of the needle valve are respectively processed to form a first inner threaded opening and a second inner threaded opening, the lower end of the transition short section is provided with a first outer threaded opening, and the top end of the sheath tube is provided with a second outer threaded opening, the first outer threaded opening is matched and fixedly connected with the first inner threaded opening, and the second outer threaded opening is matched and fixedly connected with the second inner threaded opening.

7. The antifreeze pressure cock according to claim 1, characterized in that: The needle valve is a cartridge needle valve or a manually adjustable needle valve.

8. The antifreeze pressure cock according to claim 1, characterized in that: The cold-resistant liquid includes at least one of the following: ethanol, ethylene glycol, glycerol, calcium chloride and silicate.

9. The antifreeze pressure cock according to claim 6, characterized in that: The sheath tube is made of carbon steel and is matched and fixedly connected with the second inner thread port of the needle valve.

10. The antifreeze pressure cock according to claim 1, characterized in that: The upper end of the transition nipple is matched and fixedly connected with a pressure transmitter or a pressure gauge through a conversion joint.

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