CN210509098U - Double-layer oil pipe gas injection oil extraction wellhead device - Google Patents

Abstract

The utility model discloses a gas injection oil extraction wellhead device in a double-layer oil pipe, which comprises a double slip, a blowout prevention box, a blowout preventer, an operation window and a hanger which are mutually connected from top to bottom, wherein the lower part of the hanger is also sequentially connected with two oil pipe cross joints which are arranged up and down; the gas lift wellhead device of the utility model solves the problems of dynamic seal (operation under pressure) of the wellhead and suspension of a novel gas lift pipe column in the later period when the matching device is used for tripping the non-coupling oil pipe of the workover rig; simple to operate, easy operation to can guarantee the safety of later stage oil pipe.

Description

Double-layer oil pipe gas injection oil extraction wellhead device

Technical Field

The utility model belongs to the technical field of gas lift wellhead assembly, concretely relates to gas injection oil recovery wellhead assembly in double-deck oil pipe.

Background

Gas lift refers to the stopping of a well from flowing when the energy supplied by the formation is insufficient to lift the crude oil from the bottom of the well to the surface. In order to make the oil well produce oil continuously, gas (natural gas or air) is artificially pressed into the bottom of the well to make crude oil be sprayed out of the ground.

When an existing workover rig pulls out and puts down an oil pipe without a coupling, particularly during dynamic sealing (operation under pressure) of a wellhead and later-stage suspension operation of a novel gas-lift pipe column, a plurality of problems still exist, and therefore the double-layer oil pipe gas injection oil extraction wellhead device is provided.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a gas injection oil recovery well head device in double-deck oil pipe to current workover rig that proposes in solving above-mentioned background art plays down no coupling oil pipe, especially has still lacked the problem of necessary solution device in the operation is hung to novel gas lift tubular column under well head dynamic seal (area pressure operation) and the later stage.

In order to achieve the above object, the utility model provides a following technical scheme: the special gas-lift wellhead device comprises double slips, a blowout prevention box, a blowout preventer, an operation window and a hanger which are mutually connected from top to bottom, wherein the lower part of the hanger is sequentially connected with two oil pipe cross joints which are vertically arranged.

Preferably, the double slips are pneumatic double slips and comprise a shell, a cylinder and slips, wherein the cylinder is fixed on the shell, and the slips are positioned in the shell and fixed on an output shaft of the cylinder.

Preferably, prevent spouting the box for the side is opened the door and is prevented spouting the box, and it includes packing element, last hydraulic cylinder, lower joint pillar and side door, and wherein, the packing element is located upper portion, goes up the mutual rigid coupling of hydraulic cylinder and lower hydraulic cylinder, and goes up hydraulic cylinder top and packing element fixed connection, lower joint pillar both ends respectively with packing element and lower hydraulic cylinder fixed connection, the side door setting is on the packing element.

Preferably, the blowout preventer is a four-ram blowout preventer, and the four-ram blowout preventer comprises a shell, rams, end covers, slide bars, hydraulic cylinders, pistons, locking screw rods and locking handles.

Preferably, a control valve is installed on a pipeline between the blowout preventer and the operation window, and a control valve is also installed on a pipeline between the two oil pipe four-way joints at the lower part.

Preferably, a connecting short joint is arranged between the double slips and the blowout prevention box.

Compared with the prior art, the beneficial effects of the utility model are that: the gas lift wellhead device of the utility model solves the problems of dynamic seal (operation under pressure) of the wellhead and suspension of a novel gas lift pipe column in the later period when the matching device is used for tripping the non-coupling oil pipe of the workover rig; simple to operate, easy operation to can guarantee the safety of later stage oil pipe.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the front structure of the double slips of the present invention;

fig. 3 is a schematic structural view of the front side of the blowout preventer;

FIG. 4 is a schematic view of the front structure of the blowout preventer of the present invention;

fig. 5 is a schematic view of the front structure of the operation window of the present invention;

fig. 6 is a schematic structural view of the front side of the hanger of the present invention;

FIG. 7 is a schematic view of the front side structure of the oil pipe cross of the present invention;

in the figure: 1. double slips; 2. a blowout prevention box; 3. a blowout preventer; 4. an operating window; 5. a hanger; 6. the oil pipe is four-way; 7. connecting short sections; 8. and (4) controlling the valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 6 and fig. 7, the present invention provides a technical solution: the special gas-lift wellhead device comprises a double slip 1, a blowout prevention box 2, a blowout preventer 3, an operation window 4 and a hanger 5 which are mutually connected from top to bottom, wherein the lower part of the hanger 5 is also sequentially connected with two oil pipe cross joints 6 which are arranged up and down, wherein,

the double slips 1 are pneumatic double slips and comprise a shell, an air cylinder and slips, wherein the air cylinder is fixed on the shell, the slips are positioned in the shell and fixed on an output shaft of the air cylinder, and when an oil pipe is connected, a part which enters a well is hung.

The blowout prevention box 2 is a side-opening blowout prevention box and comprises a rubber cylinder, an upper hydraulic cylinder, a lower joint pillar and a side door, wherein the rubber cylinder is positioned at the upper part, the upper hydraulic cylinder and the lower hydraulic cylinder are fixedly connected with each other, the top end of the upper hydraulic cylinder is fixedly connected with the rubber cylinder, two ends of the lower joint pillar are fixedly connected with the rubber cylinder and the lower hydraulic cylinder respectively, the side door is arranged on the rubber cylinder, and the small oil pipe is dynamically sealed.

The blowout preventer 3 is a four-ram blowout preventer and comprises a shell, rams, end covers, slide bars, hydraulic cylinders, pistons, locking screw rods and locking handles, wherein the four blowout preventers are fully sealed, sheared, suspended and semi-sealed; well blowout is prevented;

the operation window 4 consists of an upper hydraulic cylinder, a lower joint pillar and a side door and is used for throwing slips;

the hanger 5 is used for hanging the oil pipe on the Christmas tree for a long time;

the suspension mode I and the structure are characterized in that:

1. the taper stainless steel slip is adopted for suspension, the slip is thrown in from the operation window 4 during suspension, the oil pipe can be clamped by utilizing the self weight of the continuous oil pipe, the suspension slip is seated on the packing assembly, the self weight of the oil pipe is pressed on the packing, and the auxiliary function of compensating jackscrews to compress the packing is achieved;

2. the upper part of the hanger 4 is provided with a double-stage sealing centering sleeve which is used for guiding an instrument for lowering an oil pipe into the inner diameter of the coiled oil pipe, and meanwhile, a sealing ring is arranged inside and outside the centering sleeve, so that slips and auxiliary suspension are ensured to be in an environment which is not corroded, and the service life of the slips suspension is ensured;

3. the packing assembly adopts two bolts with seals to connect 5 parts in series, so that the installation and the replacement are more convenient, a certain part is prevented from being inclined and cannot be taken out, and the packing protection ring can ensure that an oil pipe does not rub a rubber packing in the running-in process;

4. the slips of the hanger 4 are cut into four pieces and connected by a synchronizing ring, so that the slips are uniformly stressed, and the hanger is convenient to install and reliable in hanging;

the suspension mode has the technical parameters that:

model number	XGQ65-70
		Vertical drift diameter	65mm
Suitable for oil pipe	48.95mm
		Rated working pressure	70MPa
Upper end connection mode	API			2 9/ 16-10000psi
		Lower end connection mode	API		2 9/ 16-10000psi
Suspension force	80t

The advantages are that: 1. the CS oil pipe and the feeding pipe suspended in the tripping and the lowering well keep the same outer diameter, and the hanger does not have a reducing and a step.

2. The last oil pipe is buckled and unbuckled, and the well head can be seen, and the box of first instrument is not fragile, guarantees the safety of later stage oil pipe.

3. The seat can be hung with a press;

the suspension mode II has the technical parameters:

model number	ZXGQ60-70
		Vertical drift diameter	60mm
Suitable for oil pipe	48.95mm
		Rated working pressure	70MPa
Upper end connection mode	2 9/16-10000psi
		Lower end connection mode	2 9/16-10000psi
Suspension force	80t

The advantages are that: 1. simple structure, low height of the blowout preventer for lifting and lowering the oil pipe,

2. the seat hanging operation is simple and the same as that of the common oil pipe seat hanging.

The oil pipe cross 6 mainly comprises a cross (a suspension device can be designed in the oil pipe cross) and four valve groups, and mainly has the functions of a gas injection inlet and an annular outlet of the oil pipe and a small oil pipe.

In this embodiment, preferably, a control valve 8 is installed on a pipe between the blowout preventer 3 and the operating window 4, and a control valve 8 is also installed on a pipe between the two lower pipe four-way joints 6.

In this embodiment, a connection nipple 7 is preferably provided between the double slips 1 and the blowout preventer 2.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The utility model provides an interior gas production well head device of annotating of double-deck oil pipe which characterized in that: the special gas-lift wellhead device comprises double slips (1), a blowout prevention box (2), a blowout preventer (3), an operation window (4) and a hanger (5) which are mutually connected from top to bottom, wherein the lower part of the hanger (5) is sequentially connected with two oil pipe cross joints (6) which are arranged up and down.

2. The dual-layer tubing gas injection and production wellhead assembly of claim 1, wherein: the double slips (1) are pneumatic double slips and comprise a shell, an air cylinder and slips, wherein the air cylinder is fixed on the shell, and the slips are located inside the shell and fixed on an output shaft of the air cylinder.

3. The dual-layer tubing gas injection and production wellhead assembly of claim 1, wherein: prevent spouting box (2) for the side door prevents spouting the box, and it includes packing element, last hydraulic cylinder, lower clutch pillar and side door, and wherein, the packing element is located upper portion, goes up the mutual rigid coupling of hydraulic cylinder and lower hydraulic cylinder, and goes up hydraulic cylinder top and packing element fixed connection, lower clutch pillar both ends respectively with packing element and lower hydraulic cylinder fixed connection, the side door sets up on the packing element.

4. The dual-layer tubing gas injection and production wellhead assembly of claim 1, wherein: the blowout preventer (3) is a four-ram blowout preventer and comprises a shell, rams, an end cover, a slide rod, a hydraulic cylinder, a piston, a locking screw rod and a locking handle.

5. The dual-layer tubing gas injection and production wellhead assembly of claim 1, wherein: and a control valve (8) is arranged on a pipeline between the blowout preventer (3) and the operation window (4), and the control valve (8) is also arranged on a pipeline between the two oil pipe four-way joints (6) positioned at the lower part.

6. The dual-layer tubing gas injection and production wellhead assembly of claim 1, wherein: and a connecting short joint (7) is arranged between the double slips (1) and the blowout prevention box (2).

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