CN210948572U - Blowout preventer of oil pumping pipe column - Google Patents

Abstract

A blowout preventer for the oil pumping pipe string is composed of a main body with screw threads for connecting the lower part of pump cylinder, a fixing seat with cylindrical tube and internal polygonal hole, a diameter-reducing segment outside the middle part of said fixing seat, a liquid outlet between said internal polygonal hole and said diameter-reducing segment, a flow-resisting plug in the main body and fixed to the lower part of said fixing seat, an annular channel between said cylindrical tube and the inner wall of main body, and a float plug with a floating force or a downward-upward liquid flow for blocking the upper channel of main body, the outer wall of the choke plug is matched with the receiving hole to fix the choke plug in the receiving hole.

Description

Blowout preventer of oil pumping pipe column

Technical Field

The utility model relates to a device that oil field oil pumping well was used with the oil-well pump is supporting, is an oil pumping tubular column blowout preventer.

Background

Sometimes, a pin-type tool is put into an oil pumping pipe column, for example, a Chinese patent 200410039801.5 "tubing anchor", a sealing cylinder is fixed by an anti-moving pin, belongs to the pin-type tool, and is installed on an oil well pump. The tools have larger outer diameter and small difference with the inner diameter of the casing, and the tools walk in the casing like pistons when going down in the casing, because the casing is filled with well fluid, when the walking speed is higher, pressure difference is formed between two ends of a pin type tool with large diameter, namely the pressure of the lower end of the tool with large diameter is higher than that of the upper end, the lower end of the tool with large diameter is communicated with an oil pipe on a pump through an oil inlet valve of an oil well pump, namely high pressure formed when the tool with large diameter goes down the well quickly can be transmitted into the oil pipe on the pump, an oil pipe column is formed by connecting oil pipes with the length of more than 9 meters, the tool is lifted to be in a vertical state by an operating machine and is put into the well, after one oil pipe is put down, the other oil pipe is lifted to be in a vertical state by the operating machine and is connected with the oil pipe which has gone down the well, the oil pipe column has a pause state in the process, the pressure at the lower end of the tool is reduced, the pressure in the oil pipe on the pump can not be reduced under the action of an oil inlet valve on the oil well pump, so that a pressure difference is formed between the inside and the outside of the large-diameter pin tool, the pressure difference is increased along with the increase of the well descending depth, when the pressure difference is increased to exceed the bearing capacity of a pin on the pin tool, the pin on the pin tool can be sheared off, the middle action of the pin tool is realized, when the pin tool acts midway, the oil pumping pipe column can not be descended, and the oil pumping pipe column can not be descended to the designed position, so that the operation can not be successful if the pin tool acts midway, and the great economic loss is caused.

Disclosure of Invention

The utility model aims at designing an oil pumping tubular column blowout preventer, when making it have the oil-well pump tubular column of pin class instrument under, the internal pressure of pin class instrument is not higher than external pressure, prevents that the pin from being cut off, guarantees that oil pumping tubular column goes into the well successfully.

The purpose of the utility model is realized like this: the choke plug is placed in the main body, the lower part of the fixing seat is internally provided with an inner polygonal hole, the middle part of the fixing seat is externally provided with a reducing section, a liquid outlet hole is arranged between the inner polygonal hole and the reducing section, after the choke plug is placed in the main body, the lower part of the fixing seat is fixed in the main body, an annular channel is formed between the cylindrical tube and the inner wall of the main body, the lower part of the annular channel is communicated with the liquid outlet hole, the outer diameter of the choke plug is larger than the inner diameter of the upper part of the main body, the choke plug can block the upper channel of the main body under the action of buoyancy or liquid flow from bottom to top, and after the choke plug is pressed into the receiving hole from top to bottom by external force, the outer wall of the choke plug is matched with the receiving hole to fix the choke plug in the receiving hole, and the inner diameter of the upper part of the main body is larger than the diameter of the plunger of the oil well pump.

The utility model has the advantages that: the utility model discloses install between the pump barrel of oil-well pump and inlet valve, in the time of going into the well liquid can not get into the pump oil pipe, the internal pressure of the pin class instrument of connecting on the tubular column can not be higher than external pressure, and the pin on the pin class instrument can not be cut off when going into the well, can prevent that pin class instrument from moving midway, guarantees that the oil pumping tubular column is gone into the well successfully.

Drawings

Fig. 1 is a structural diagram of the present invention.

Detailed Description

The following describes an embodiment of the present invention in detail with reference to fig. 1.

As shown in figure 1, the embodiment of the utility model comprises a main body 1, a choke plug 2 and a fixed seat 3, wherein the upper part of the main body 1 is provided with a thread connected with the lower part of a pump cylinder of an oil well pump, the lower part of the main body 1 is provided with a thread connected with the upper part of an oil inlet valve of the oil well pump, the upper part of the fixed seat 3 is provided with a cylinder 3-2, the cylinder 3-2 is internally provided with a receiving hole 3-1, the lower part of the fixed seat 3 is internally provided with an inner polygonal hole 3-5, the middle part of the fixed seat 3 is externally provided with a reducing section 3-3, a liquid outlet 3-4 is arranged between the inner polygonal hole 3-5 and the reducing section 3-3, after the choke plug 2 is placed in the main body 1, the lower part of the fixed seat 3 is fixed in the main body 1 (the lower external thread of the fixed seat 3 is connected, an annular channel 4 is formed between the cylindrical barrel 3-2 and the inner wall of the main body 1, the lower part of the annular channel 4 is communicated with the liquid outlet hole 3-4, the outer diameter of the flow blocking plug 2 is larger than the inner diameter of the upper part of the main body 1, the flow blocking plug 2 can block the upper channel of the main body 1 under the action of buoyancy or liquid flow from bottom to top, after the flow blocking plug 2 is pressed into the receiving hole 3-1 from top to bottom by external force, the outer wall 2-1 of the flow blocking plug 2 is matched with the receiving hole 3-1 to fix the flow blocking plug 2 in the receiving hole 3-1, and the inner diameter of the upper part of the main body 1 is larger than the diameter of a plunger of an oil well pump.

An inner polygonal hole 3-5 arranged in the lower part of the fixed seat 3 is used for installing and placing tools when the fixed seat is connected to the main body, so that the fixed seat 3 and the main body 1 are firmly connected.

The utility model discloses install under the pump barrel of oil-well pump and inlet valve, along with the oil pumping tubular column goes into in the well. When the oil well is lowered, the upper channel of the main body 1 is blocked by the choke plug 2, well liquid cannot enter the oil pipe on the pump, the internal pressure of a pin tool connected to the pump barrel of the oil well pump cannot be higher than the external pressure, the pin tool cannot move midway, and the success of the lowering operation is ensured.

After the design position was gone down to the oil pumping tubular column, in putting into the pump barrel under the sucker rod lower part with oil-well pump piston connection again, in oil-well pump piston lower part can reach main part 1, the weight pressure of oil-well rod post left choked flow stopper 2, made its choked flow stopper 2 no longer block up the upper portion passageway of main part 1, the utility model discloses well liquid under can pass through go out liquid hole 3-4, annular channel 4 get into the pump in, the oil feed passageway is opened. The choke plug 2 is pressed into the receiving hole 3-1 by the weight of the sucker rod, and the outer wall 2-1 of the choke plug 2 is in static fit with the receiving hole 3-1, so that the choke plug 2 is fixed, the oil inlet channel is always opened, and the oil pump can normally pump oil.

If the choke plug 2 rises by buoyancy to block the passage of the main body 1, the weight of the choke plug 2 is less than the buoyancy of the choke plug 2 in the well fluid.

Claims (1)

1. The utility model provides an oil pumping tubular column blowout preventer, includes main part (1), choked flow stopper (2), fixing base (3), the upper portion of main part (1) have with the thread of the sub-unit connection of oil-well pump barrel, the lower part of main part (1) have with the thread that the upper portion of oil-well pump inlet valve is connected, characterized by: the upper part of the fixed seat (3) is provided with a cylindrical barrel (3-2), a receiving hole (3-1) is arranged in the cylindrical barrel (3-2), an inner polygonal hole (3-5) is arranged in the lower part of the fixed seat (3), a reducing section (3-3) is arranged outside the middle part of the fixed seat (3), a liquid outlet hole (3-4) is arranged between the inner polygonal hole (3-5) and the reducing section (3-3), after the flow blocking plug (2) is placed in the main body (1), the lower part of the fixed seat (3) is fixed in the main body (1), an annular channel (4) is formed between the cylindrical barrel (3-2) and the inner wall of the main body (1), the lower part of the annular channel (4) is communicated with the liquid outlet hole (3-4), and the outer diameter of the flow blocking plug (2) is larger than the inner diameter of the upper part of the main body (1), under the action of buoyancy or liquid flow from bottom to top, the choke plug (2) can block an upper channel of the main body (1), after the choke plug (2) is pressed into the receiving hole (3-1) from top to bottom by external force, the outer wall (2-1) of the choke plug (2) is matched with the receiving hole (3-1) to fix the choke plug (2) in the receiving hole (3-1), and the inner diameter of the upper part of the main body (1) is larger than the diameter of a plunger of the oil well pump.

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