CN201620853U - Multi-layer mining single pump constant pressure gas-proof pipe column - Google Patents

Abstract

A multi-layer exploitation single-pump constant-pressure gas-proof pipe column is applied. The lower end of the deep-well pump is connected with a gas-liquid separation device, the lower end of the gas-liquid separation device is connected with a Y111 packer, the lower end of the Y111 packer is connected with a constant pressure production allocator, the lower end of the constant pressure production allocator is connected with a Y211 packer, and the lower end of the Y211 packer is connected with a sieve tube and a plug; with the Y111 packer positioned above the upper reservoir and the Y211 packer between the upper reservoir and the lower reservoir. The effect is as follows: a gas-liquid separation device is adopted between the deep-well pump and the constant-pressure production allocator to communicate the oil pipe with the casing, so that the influence of the constant-pressure production allocator on the pumping of the deep-well pump is eliminated; the gas-liquid separation device realizes the gas-liquid separation of the underground produced liquid.

Description

Multi-layer mining single-pump constant-pressure gas-proof pipe string

technical field

The utility model relates to the technical field of oil production in oil fields, in particular to a multi-layer production gas-proof oil recovery downhole pipe string used in multi-layer production in wells with a high gas-oil ratio, and is suitable for multi-layer oil wells with pressure interference between layers in the casing completion mode Combined mining.

Background technique

For layered production of multi-layer oil wells, layered oil production pumps, control tools and ordinary deep well pumps are mainly used for production. For layered oil production pumps, there are two methods of separate production and mixed production and separate production and separation. The two layers of pumping are controlled by the size of the pump diameter, and the pumping intensity of the two layers is difficult to control, and it is impossible to achieve a reasonable oil well working system for both layers. production problems. For control tools and ordinary deep well pump mining, the control tools used mainly include constant pressure distribution device and constant displacement controller. The constant displacement controller cannot be realized for wells with low production. At present, there is no application of gas prevention measures in the pump production string, and the constant pressure distributor has a certain influence on the pumping of the pump.

Utility model content

The purpose of this utility model is: to provide a multi-layer mining single-pump constant-pressure anti-air pipe string, on the basis of the existing single-pump constant-pressure process pipe string, through a gas-liquid separation device for oil pipe feeding to solve the problem of high gas oil Compared with the problem of difficult gas prevention in the multi-layer production of the well, at the same time, the pumping is not limited by the constant pressure distribution device, and the function of obtaining the dynamic liquid level data of the two layers can be achieved, so that the two layers can be mined according to the set Reasonable flow pressure production.

The technical scheme adopted by the utility model is: multi-layer mining single-pump constant-pressure anti-air pipe string, mainly composed of deep well pump, gas-liquid separation device, Y111 packer, constant-pressure distribution device, Y211 packer, screen pipe, wire Block composition. A deep well pump is connected to the lower end of the tubing. It is characterized in that: a gas-liquid separation device is connected to the lower end of the deep well pump, the lower end of the gas-liquid separation device is connected to a Y111 packer, the lower end of the Y111 packer is connected to a constant pressure distribution device, and the lower end of the constant pressure distribution device is connected to a Y211 packer. The lower end of the Y211 packer is connected with the screen pipe and the plug. The Y111 packer is above the upper oil layer, and the Y211 packer is between the upper oil layer and the lower oil layer. The fluid produced in the lower oil layer enters the oil pipe after passing through the screen tube and the constant pressure distributor and mixes with the fluid produced in the upper oil layer; the fluid produced in the upper oil layer enters the constant pressure distributor, enters the oil pipe and is produced The mixed fluid enters the casing through the gas-liquid separation device upwards, the gas separated by the gas-liquid separation device moves upwards and is discharged from the casing, and the liquid separated by the gas-liquid separation device enters the deep well through the gas-liquid separation device pump, and is lifted to the surface by a deep well pump.

The opening pressure of the constant pressure distribution device is set according to the pressure data measured in the early stage of the two layers that need to be mined separately. When running into the process string, the constant pressure distribution device is set in the layer where the pressure is relatively high or needs to be restricted (generally the upper layer), the oil pipe is connected between the screen and the plug, and the Y211 packer is set between the two oil layers During the period, the Y111 packer was set on the upper part of the upper oil layer to ensure that the two oil layers exploited were stuck in the casing respectively to form a closed space. The gas-liquid separation device is connected to the lower end of the deep well pump. After the tubing string is put in place, lift up and lower the tubing string to set the packer, and rely on the slips of the Y211 packer to form a fulcrum to set the Y111 packer. The setting tonnage of the packer should be controlled at 6-8t. After the spacer is set, the sucker rod is lowered into the well to complete production.

The gas-liquid separation device is composed of an upper joint, a flow diversion mechanism, a collar, an inner pipe, an outer pipe and a lower joint. The inner thread at the lower end of the upper joint is connected with a diversion mechanism; the inner thread at the lower end of the diversion mechanism is connected with an inner pipe, and the outer thread at the lower end of the diversion mechanism is connected with an outer pipe, and the lower part of the outer pipe has a sieve hole. A lower joint is connected to the lower end of the inner pipe, and another external thread on the upper end of the lower joint is connected to the lower end of the outer pipe. Wherein, the lower end of the flow diversion mechanism has a blocked central hole, and an axial through hole is formed around the blocked central hole, and the blocked central hole at the lower end communicates with the axial through hole.

The gas-liquid mixed fluid produced in the oil layer flows into the inner pipe through the lower joint, and flows through the flow distribution mechanism at the upper end of the inner pipe. It flows into the axial through hole from the center hole of the splitter mechanism. In the axial through hole, the gas in the gas-liquid mixed fluid moves upward, and the liquid moves downward, so as to realize the effective separation of free gas. The liquid flows out from the diverting mechanism into the outer pipe, and under the pumping of the deep well pump, the liquid in the outer pipe moves downwards and flows out of the outer pipe through the mesh hole at the lower end of the outer pipe.

Beneficial effects of the utility model: the utility model multi-layer mining single-pump constant pressure anti-trachea column,

1. A gas-liquid separation device is used between the deep well pump and the constant pressure distribution device to connect the oil pipe and the casing, which is an open space and eliminates the influence of the constant pressure distribution device on the deep well pump pumping.

2. The gas-liquid separation device realizes the separation of free gas in the multi-layer mining process.

3. Both layers of liquid can enter the annular space of the oil jacket, and the data of the dynamic liquid level of the two layers can be measured.

4. The constant pressure distribution device realizes single-flow effect on both layers, further preventing inter-layer interference.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the multi-layer mining single-pump constant-pressure gas-proof pipe string of the utility model.

FIG. 2 is a schematic structural diagram of the gas-liquid separation device 2 .

Fig. 3 is a schematic cross-sectional view of the flow dividing mechanism 9 of the gas-liquid separation device.

In the figure, 1. Deep well pump, 2. Gas-liquid separation device, 3. Y111 packer, 4. Constant pressure distribution device, 5. Y211 packer, 6. Screen pipe, 7. Plug, 8. Up Joint, 9. Diverting mechanism, 10. Coupling, 11. Inner pipe, 12. Outer pipe, 13. Lower joint.

Detailed ways

Embodiment 1: Taking a multi-layer mining single-pump constant-pressure gas-proof pipe string as an example, the utility model is further described in detail.

See Figure 1. The utility model multi-layer mining single-pump constant-pressure anti-air pipe string mainly consists of a deep well pump 1, a gas-liquid separation device 2, a Y111 packer 3, a constant-pressure distribution device 4, a Y211 packer 5, a screen pipe 6, a wire Block 7 composition. The multi-layer production single-pump constant-pressure gas-proof pipe string is lowered into the casing of the oil well.

A deep well pump 1 is connected to the lower end of the oil pipe. A gas-liquid separation device 2 is connected to the lower end of the deep well pump 1, the lower end of the gas-liquid separation device 2 is connected to the Y111 packer 3, the lower end of the Y111 packer 3 is connected to the constant pressure distribution device 4, and the constant pressure distribution device 4 The lower end is connected with a Y211 packer 5, and the lower end of the Y211 packer 5 is connected with the screen pipe 6 and the plug 7 in sequence. The position of Y111 packer 3 is above the upper oil layer, and Y211 packer 5 is between the upper oil layer and the lower oil layer.

See Figure 2. The gas-liquid separation device 2 is composed of an upper joint 8 , a flow diversion mechanism 9 , a collar 10 , an inner pipe 11 , an outer pipe 12 and a lower joint 13 . A shunt mechanism 9 is connected to the inner thread at the lower end of the upper joint 8; the inner thread at the lower end of the shunt mechanism 9 is connected to an inner pipe 11, and the lower end of the shunt mechanism 9 is outer threaded to connect an outer pipe 12, and the lower part of the outer pipe 12 has a sieve hole; the inner pipe The lower end of 11 is connected with a lower joint 13, and the other external thread of the upper end of lower joint 13 is connected with the lower end of outer pipe 12.

See Figure 3. There is an unreasonable central hole at the lower end of the diversion mechanism 9, and there are two axial through holes around the unreasonable central hole, and the unreasonable central hole at the lower end communicates with the axial through hole.

Claims (2)

1. A multi-layer mining single-pump constant pressure gas prevention string, mainly composed of deep well pump (1), gas-liquid separation device (2), Y111 packer (3), constant pressure distribution device (4), Y211 packer Composed of spacers (5), screen pipes (6) and plugs (7), a deep well pump (1) is connected to the lower end of the tubing; it is characterized in that a gas-liquid separation device (2) is connected to the lower end of the deep well pump (1). ), the lower end of the gas-liquid separation device (2) is connected to the Y111 packer (3), the lower end of the Y111 packer (3) is connected to the constant pressure distribution device (4), and the lower end of the constant pressure distribution device (4) is connected to the Y211 The lower end of the packer (5), the Y211 packer (5) is connected to the screen (6) and the plug (7); the Y111 packer (3) is located above the upper oil layer, and the Y211 packer ( 5) Between the upper oil layer and the lower oil layer. 2. The multi-layer mining single-pump constant-pressure gas-proof pipe string according to claim 1, characterized in that: the gas-liquid separation device (2) is composed of an upper joint (8), a flow diversion mechanism (9), a collar (10), inner pipe (11), outer pipe (12) and lower joint (13); the lower end of the upper joint (8) is internally threaded with a shunt mechanism (9); the lower end of the shunt mechanism (9) is internally threaded with a The inner pipe (11), the lower end of the shunt mechanism (9) is externally threaded to connect an outer pipe (12), and the bottom of the outer pipe (12) has a sieve hole; the lower end of the inner pipe (11) is connected to a lower joint (13), the lower The other external thread of the upper end of the joint (13) is connected to the lower end of the outer pipe (12), wherein the lower end of the flow diversion mechanism (9) has an unreasonable central hole, and an axial through hole is arranged around the unreasonable central hole, and the impassable central hole at the lower end is connected to the The axial through hole is connected.

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