CN207212312U - A kind of multi-functional pressure obtaning device - Google Patents

Abstract

The utility model discloses a multifunctional pressure-taking device, which comprises a gas production pipe connected with wellhead casing pressure or oil pressure, and the gas production pipe is respectively connected with a medicine injection pipe and a pressure monitoring pipe; The drug injection pipe is provided with a valve I for controlling the injection port of the medicine; the pressure monitoring pipe is provided with a pressure gauge and a pressure transmitter, and the pressure monitoring pipe is provided with a valve II for controlling the pressure gauge and the pressure transmitter; The utility model can simultaneously realize on-site pressure monitoring and remote monitoring, medicine injection and other operations, and is safe in use and simple in maintenance.

Description

A multifunctional pressure taking device

technical field

The utility model relates to the technical field of natural gas exploitation, in particular to a multifunctional pressure-taking device for on-site pressure monitoring, remote monitoring and medicament injection.

Background technique

Like crude oil, natural gas is buried in underground closed geological structures, some of which are stored in the same layer as crude oil, and some exist alone. For natural gas stored in the same layer as crude oil, it will be extracted together with crude oil. For those with only single-phase gas, we call them gas reservoirs, and their extraction methods are very similar to those of crude oil, but also have their own special features. First of all, natural gas, like crude oil, is often a storage system with bottom water or edge water. With the development of natural gas, the elastic energy of the water body will drive the water into the gas reservoir along the high permeability zone. In this case, due to the hydrophilicity of the rock itself and the effect of capillary pressure, the intrusion of water does not effectively displace the gas, but seals the undischarged gas in the cracks, holes or gaps, forming a dead gas zone. This part of the high-pressure gas trapped in the water invasion zone can be as high as 30% to 50% of the rock pore volume, thus greatly reducing the ultimate recovery of the gas reservoir. Secondly, after the gas well produces water, the seepage resistance of the gas flowing into the bottom of the well will increase, and the total energy consumption of the gas-liquid two-phase pipe flow upward along the oil well will increase significantly.

The existing gas production equipment and pipelines for gas production in gas fields need to be equipped with a pressure detection device. The pressure detection device includes a gas production pipeline. The meter is used for on-site monitoring of wellhead casing pressure or oil pressure. This pressure-taking device can realize on-site data monitoring, but it cannot realize remote monitoring at the same time. It is necessary to remove the pressure gauge, and then add filling equipment to inject the agent, resulting in many processes, easy damage to the pressure gauge, and low operating efficiency.

Another Chinese patent number is CN201420736496.4, which discloses a chemical addition device for recovering oil well casing gas, which belongs to the technical field of oil well production. The medicament adding device comprises: a medicament storage tank with a sealed top; a medicament discharge pipeline connected to the bottom of the medicament storage tank; A gas balance pipe connected at the top and connected with the medicament discharge pipeline; a medicament adding funnel located at the top of the medicament storage tank; and an air release pipe located at the top of the medicament storage tank. It can be seen from the above-mentioned patents that at present, all the devices used in oil well fields are used for dosing separately or after the monitored pressure gauge is removed, and the interface of the pressure gauge is connected to the medicine injector to add medicine, which is troublesome to operate and often Remove vulnerable parts.

Utility model content

In order to overcome the defects of the prior art, the utility model provides a multifunctional pressure-taking device, which can realize on-site pressure monitoring and remote monitoring, drug injection and other operations at the same time, and is safe to use and easy to maintain.

In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is:

A multifunctional pressure-taking device, comprising a gas production pipe connected to wellhead casing pressure or oil pressure, characterized in that: the gas production pipe is respectively connected to a medicine injection pipe and a pressure monitoring pipe; the medicine injection pipe is provided with a medicine The injection port is provided with a valve I for controlling the injection port of the drug; the pressure monitoring tube is provided with a pressure gauge and a pressure transmitter, and the pressure monitoring tube is provided with a valve for controlling the pressure gauge and the pressure transmitter. Valve II. The pressure transmitter is connected with the controller (such as: PLC controller).

Internal threads are arranged in the medicament injection port.

The pressure monitoring pipe and the gas collection pipe are perpendicular to each other.

The utility model has the following advantages:

1. The gas extraction pipe of the utility model is respectively connected with a medicine injection pipe and a pressure monitoring pipe; the medicine injection pipe is provided with a medicine injection port, and the medicine injection pipe is provided with a valve I for controlling the medicine injection port; the pressure monitoring A pressure gauge and a pressure transmitter are arranged on the pipe, and a valve II for controlling the pressure gauge and pressure transmitter is arranged on the pressure monitoring pipe. One end of the gas production pipe is connected to the wellhead casing or oil pressure. During normal monitoring, the valve II is opened and the valve I is closed. The pressure monitoring pipe is connected in parallel with the pressure gauge and the pressure transmitter. The pressure gauge and the pressure transmitter are compared. It is convenient for the on-site staff to judge whether the data is normal; when it is necessary to add chemicals, close the valve II (to avoid damage to the pressure gauge and pressure transmitter due to high pressure), and open the valve I, then the filling operation can be carried out, achieving safe, fast and convenient Purpose.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a working principle diagram of the utility model.

Marks in the figure: 1. Gas collection pipe, 2. Drug injection pipe, 3. Pressure monitoring pipe, 4. Valve I, 5, Valve II, 6. Pressure gauge, 7. Pressure transmitter, 8. Drug injection port.

Detailed ways

Example 1

As shown in Fig. 1 and Fig. 2, a multi-functional pressure-taking device is suitable for wellheads and gas production and transmission equipment that require dual monitoring or injection of chemicals. It can realize on-site monitoring, remote monitoring, and drug injection operations.

A multifunctional pressure-taking device, comprising a gas production pipe 1 connected to wellhead casing pressure or oil pressure, and the gas production pipe 1 is respectively connected to a drug injection pipe 2 and a pressure monitoring pipe 3 . The medicine injection pipe 2 is provided with a medicine injection port 8, that is, one end of the medicine injection pipe 2 communicates with the gas sampling pipe 1, and the other end is a medicine injection port 8, and the medicine injection pipe 2 is provided with a valve I4 for controlling the medicine injection port 8. The pressure monitoring tube 3 is provided with a pressure gauge 6 and a pressure transmitter 7, the pressure gauge 6 and the pressure transmitter 7 are connected to the pressure monitoring tube 3 in parallel, and the pressure monitoring tube 3 is provided with a pressure gauge 6 and a pressure transmitter for controlling the pressure gauge 6 and pressure transmitter 7. Valve II5 of transmitter 7. The pressure transmitter is connected with the controller (such as: PLC controller). Internal thread is set in the medicament injection port 8, which is easy to connect with the injection equipment. The pressure monitoring pipe 3 and the gas collection pipe 1 are perpendicular to each other, saving space.

Its working principle (as shown in Figure 2), one end of the gas production pipe is connected to the wellhead sleeve or oil pressure. During normal monitoring, valve II is opened and valve I is closed. The pressure monitoring pipe is connected in parallel with the pressure gauge and the pressure transmitter. Compared with the pressure transmitter, it is convenient for the on-site staff to judge whether the data is normal; when it is necessary to add chemicals, close the valve II (to avoid damage to the pressure gauge and pressure transmitter due to high pressure), and open the valve I, then it can be filled Operation, to achieve the purpose of safety, speed and convenience.

Claims (3)

1. a kind of multi-functional pressure obtaning device, including the air collecting pipe (1) being connected with surface casing pressure or oil pressure, it is characterised in that：It is described Connected respectively and medicine-pouring pipe (2) and pressure monitoring pipe (3) on air collecting pipe (1)；The medicine-pouring pipe (2) is provided with medicament inlet (8), medicine-pouring pipe (2) is provided with the valve I (4) for being used for controlling medicament inlet (8)；The pressure monitoring pipe (3) is provided with pressure Power table (6) and pressure transmitter (7), pressure monitoring pipe (3) are provided with for control pressure table (6) and pressure transmitter (7) Valve II (5).

A kind of 2. multi-functional pressure obtaning device according to claim 1, it is characterised in that：Set in the medicament inlet (8) Put internal thread.

3. multi-functional pressure obtaning device according to claim 1, it is characterised in that：The pressure monitoring pipe (3) and air collecting pipe (1) it is mutually perpendicular to.