Constant-pressure deflation valve for oil jacket intercommunication adjustment

Abstract

The invention discloses a constant-pressure deflation valve for oil jacket intercommunication adjustment. The constant-pressure deflation valve comprises a constant-pressure deflation valve main body, a regulating valve seat, a regulating valve and a hand wheel, a valve ball, a valve seat and a spring are arranged in the constant-pressure deflation valve body, an open hole is formed in one side of the constant-pressure deflation valve body, and the bottom of the open hole is higher than the top of the valve seat. The adjusting valve seat is of a tubular structure, and the inner end is connected to the open hole. The adjusting valve is composed of a valve body and a valve element, the inner end of the valve body is connected to the outer end of the adjusting valve seat, and the outer end of the valve element is connected with the hand wheel. The device has the advantages that the device has a casing gas recycling function and a new constant-pressure gas discharging function when an oil pipe leaks, the labor intensity of workers can be reduced, the well stopping time can be shortened, production of an oil well can be recovered as soon as possible, losses caused by well stopping are reduced, oil well operation is safer and more efficient, and the production efficiency of the oil well is improved. And environmental pollution caused by leakage of a part of crude oil during pressure relief can be avoided, so that environmental protection is facilitated.

Description

Technical Field

[0001] The invention belongs to the technical field of oilfield development, and in particular relates to a constant-pressure air release valve used for oil-casing intercommunication regulation. Background Art

[0002] At present, in oilfield exploitation, oil wells mostly use the water injection process, that is, multiple oil wells are connected in series on the water injection ring using oil pipes. Since the circulating water in the water injection ring is deoiled sewage, it is extremely corrosive, so it is easy to cause corrosion in the iron pipe part of the oil pipe. Once perforation occurs due to corrosion, repair and rescue are required to restore oil well production in time. Before repair and rescue, all the oil and gas in the oil pipe to be repaired need to be discharged to relieve the pressure. Since there is no special pressure relief port in the metering station and on the oil well, the commonly used method is to remove the valve ball in the constant pressure vent valve connected between the oil pipe and the casing and then install it, and then put the oil and gas in the oil pipe into the casing. Another method is to take out the valve core in the check valve, install the check valve, connect one end of the rubber tube to the sampling port of the check valve, and insert the other end into the gate of the casing for pressure relief. Obviously, such operation will cause leakage of some crude oil and pollute the environment, increase the labor intensity of the staff, and need to perform the above-mentioned pressure relief operation on two to three oil wells near the oil pipe to be repaired on the water ring, resulting in a long well shutdown time, thus bringing unnecessary losses. Summary of the invention

[0003] In order to solve the above problems, the object of the present invention is to provide a constant pressure air release valve for oil-casing intercommunication regulation.

[0004] In order to achieve the above-mentioned purpose, the constant-pressure air release valve for oil-casing intercommunication adjustment provided by the present invention comprises a constant-pressure air release valve body, a regulating valve seat, a regulating valve and a hand wheel; wherein, the two ports of the constant-pressure air release valve body are respectively connected to the oil pipe and the casing, and two flow channels parallel to each other and arranged up and down are formed inside, the outer ends of the two flow channels are respectively connected to the two ports, and the inner ends of the two flow channels are both located in the middle part of the interior of the constant-pressure air release valve body; wherein the inner end of the flow channel connected to the oil pipe is provided with a valve seat, and the inner end of the flow channel connected to the casing is provided with a valve ball, the valve ball is placed on the valve seat and a spring is provided on the upper side, and at the same time, an opening is formed on one side of the constant-pressure air release valve body, and the bottom of the opening is higher than the top of the valve seat; the regulating valve seat is a tubular structure, and the inner end is connected to the opening; the regulating valve is composed of a valve body and a valve core, the inner end of the valve body is connected to the outer end of the regulating valve seat, and the outer end of the valve core is connected to the hand wheel.

[0005] The diameter of the opening is 13 mm, and the bottom of the hole is 1 mm higher than the top surface of the valve seat to prevent the valve seat from being poorly sealed.

[0006] The front end of the valve core is in a cone shape and is directly opposite to the edge of the curved surface where the valve seat and the valve ball are in contact.

[0007] The constant pressure air release valve for oil-casing intercommunication adjustment provided by the present invention has the following beneficial effects:

[0008] The constant pressure bleed valve has both the function of casing gas recovery and the new function of constant pressure bleed when the oil pipe leaks, which can reduce the labor intensity of the staff and the downtime of the well, so that the oil well can resume production as soon as possible, reduce the losses caused by downtime, make the oil well operation safer and more efficient, and improve the production efficiency of the oil well. In addition, it can avoid environmental pollution caused by the leakage of part of the crude oil during pressure relief, so it is beneficial to environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 A three-dimensional diagram of the structure of a constant-pressure air release valve for oil-casing intercommunication regulation provided by the present invention.

[0010] Figure 2 A cross-sectional view of the transverse structure of a constant-pressure air release valve for oil-casing intercommunication regulation provided by the present invention.

[0011] Figure 3 A top view of the disassembled state of the constant-pressure air release valve for oil-casing intercommunication adjustment provided by the present invention. DETAILED DESCRIPTION

[0012] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0013] like Figure 1-Figure 3 As shown, the constant pressure bleed valve for oil-casing intercommunication adjustment provided by the present invention comprises a constant pressure bleed valve body 1, a regulating valve seat 2, a regulating valve 3 and a hand wheel 4; wherein the two ports of the constant pressure bleed valve body 1 are respectively connected to the oil pipe and the casing, and two mutually parallel flow channels arranged up and down are formed inside, the outer ends of the two flow channels are respectively connected to the two ports, and the inner ends of the two flow channels are both located in the middle part of the interior of the constant pressure bleed valve body 1; wherein the inner end of the flow channel connected to the oil pipe is provided with a valve seat 1-1, and the inner end of the flow channel connected to the casing is provided with a valve seat 1-1. A valve ball 1-2 is provided at the inner end of the flow channel connected to the pipe, the valve ball 1-2 is placed on the valve seat 1-1 and a spring 1-3 is provided on the upper side, and an opening is formed on one side of the constant pressure air release valve body 1, and the bottom of the opening is higher than the top of the valve seat 1-1; the regulating valve seat 2 is a tubular structure, and the inner end is connected to the opening; the regulating valve 3 is composed of a valve body 3-1 and a valve core 3-2, the inner end of the valve body 3-1 is connected to the outer end of the regulating valve seat 2, and the outer end of the valve core 3-2 is connected to the hand wheel 4.

[0014] The diameter of the opening is 13 mm, and the bottom of the hole is 1 mm higher than the top surface of the valve seat 1-1 to prevent the valve seat 1-1 from being poorly sealed.

[0015] The front end of the valve core 3-2 is in a cone shape and is directly opposite to the curved edge of the contact between the valve seat 1-1 and the valve ball 1-2.

[0016] The working principle of the constant pressure air release valve for oil-casing intercommunication regulation provided by the present invention is described as follows:

[0017] When the oil well is in normal production, the staff uses the hand wheel 4 to rotate counterclockwise to shrink the valve core 3-2 on the regulating valve 3 into the valve body 3-1. When the pipeline leaks and pressure relief is required, the hand wheel 4 only needs to be rotated clockwise. During this process, the valve core 3-2 will extend until the conical front end of the valve core 3-2 is between the curved surfaces of the valve seat 1-1 and the valve ball 1-2, thereby raising the valve ball 1-2. At this time, the flow channel between the oil pipe and the casing is connected, and the oil and gas in the oil pipe naturally leak into the casing, thereby achieving pressure relief. Improving the current pressure relief method can reduce the labor intensity of employees and avoid environmental pollution caused by the leakage of part of the crude oil during pressure relief, while reducing the downtime of the well, so that the oil well can resume production as soon as possible and reduce the losses caused by the downtime. After maintenance, the valve core 3-2 is retracted into the valve body 3-1.

Claims

1. A constant pressure vent valve for oil-casing intercommunication adjustment, Features: The constant-pressure air release valve for oil-casing intercommunication regulation comprises a constant-pressure air release valve body (1), an adjusting valve seat (2), an adjusting valve (3) and a hand wheel (4); wherein the two ports of the constant-pressure air release valve body (1) are respectively connected to the oil pipe and the casing, and two mutually parallel flow channels arranged up and down are formed inside, the outer ends of the two flow channels are respectively connected to the two ports, and the inner ends of the two flow channels are both located in the middle part of the constant-pressure air release valve body (1); wherein the inner end of the flow channel communicating with the oil pipe is provided with a valve seat (1-1), and the inner end of the flow channel communicating with the casing is provided with a A valve ball (1-2) is placed on a valve seat (1-1) and a spring (1-3) is arranged on the upper side. An opening is formed on one side of a constant pressure air release valve body (1), and the bottom of the opening is higher than the top of the valve seat (1-1). The regulating valve seat (2) is a tubular structure, and the inner end is connected to the opening. The regulating valve (3) is composed of a valve body (3-1) and a valve core (3-2). The inner end of the valve body (3-1) is connected to the outer end of the regulating valve seat (2), and the outer end of the valve core (3-2) is connected to a hand wheel (4).

2. The constant pressure vent valve for oil-casing intercommunication adjustment according to claim 1, Features: The diameter of the opening is 13 mm, and the bottom of the hole is 1 mm higher than the top surface of the valve seat (1-1).

3. The constant pressure air release valve for oil-casing intercommunication adjustment according to claim 1, Features: The front end of the valve core (3-2) is in a cone shape and is directly opposite to the edge of the curved surface in contact between the valve seat (1-1) and the valve ball (1-2).

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