CN218669295U

CN218669295U - Well mouth self-sealing blowout preventer

Info

Publication number: CN218669295U
Application number: CN202222903805.XU
Authority: CN
Inventors: 王磊; 李海; 陈仁涛; 刘军
Original assignee: Shandong Santian Linqu Petroleum Machinery Co ltd
Current assignee: Shandong Santian Linqu Petroleum Machinery Co ltd
Priority date: 2022-11-01
Filing date: 2022-11-01
Publication date: 2023-03-21
Anticipated expiration: 2032-11-01

Abstract

The utility model belongs to the technical field of petroleum machinery, and discloses a wellhead self-sealing blowout preventer, which comprises an upper flange, a lower flange and a sealing rubber sleeve, wherein the upper flange and the lower flange respectively comprise a plate body part, a cylinder body part and a central hole, the cylinder body part of the upper flange is in threaded connection with the cylinder body part of the lower flange, a rubber sleeve body of the sealing rubber sleeve penetrates through the central hole of the lower flange, and the upper edge of the rubber sleeve of the sealing rubber sleeve is clamped between the lower flange and the upper flange; will the utility model discloses a well head is proclaimed oneself and is prevented spouting apparatus installs behind the well head, sealed gum cover is fixed in well head department, when playing oil pipe, pull down the oil pipe hanger from oil pipe, can lift oil pipe, sealed gum cover utilizes self elasticity tightly to embrace the oil pipe outer wall, when preventing pressure oil spun, the oil that also prevents the oil pipe outer wall effectively is taken out the well head, prevent blowout and well head pollution, needn't dismantle after the installation, sealed gum cover need not install alone again in follow-up workover, replace manual operation, the labor intensity is reduced, the operating efficiency and the operation security have greatly been improved.

Description

Well mouth self-sealing blowout preventer

Technical Field

The utility model relates to a petroleum machinery technical field, concretely relates to well head self-sealing blowout preventer that workover in-process was used.

Background

In the process of oil field well repairing operation, the main construction procedure is to pull down the sucker rod and the oil pipe, and when the sucker rod and the oil pipe are pulled down in the construction process, leakage often occurs due to underground residual pressure, and even well kick and blowout accidents occur. In order to prevent well kick and blowout accidents, when the sucker rod and the oil pipe are taken down, effective self-sealing blowout prevention measures must be adopted. Wherein, the sealing rubber sleeve is an indispensable self-sealing blowout prevention element. At present, during workover operation, a manual operation mode is adopted, the oil pipe hanger is firstly detached from the upper end of an oil pipe, then the sealing rubber sleeve is sleeved on the oil pipe, the upper edge of the rubber sleeve of the sealing rubber sleeve is pressed on a well mouth by the pressing ring, and then the oil pipe can be lifted. The sealing rubber sleeve is required to be independently installed each time, the operation is carried out according to the sequence, the use is not flexible enough, the construction operation is inconvenient, the time and the labor are wasted, the efficiency is low, and higher potential safety hazards exist.

Disclosure of Invention

In view of this, the technical problem to be solved by the present invention is: the utility model provides a blowout preventer is proclaimed oneself to well head installs in the well head, replaces manual operation, can effectively prevent the blowout, prevents the well head pollution, reduces intensity of labour, improves operating efficiency and operation security.

In order to solve the technical problem, the technical scheme of the utility model is that: the blowout preventer is proclaimed oneself to the well head, the blowout preventer is proclaimed oneself to the well head includes:

the flange assembly comprises an upper flange and a lower flange which are connected together, the upper flange and the lower flange respectively comprise a plate body part, a cylinder body part and a central hole, the periphery of the plate body part is provided with a plate body through hole, the cylinder body part of the upper flange is provided with an external thread, and the cylinder body part of the lower flange is provided with an internal thread connected with the external thread;

the sealing rubber sleeve comprises a rubber sleeve body and an upper edge of the rubber sleeve, wherein the upper edge of the rubber sleeve is arranged at the upper end of the rubber sleeve body and extends outwards, the rubber sleeve body penetrates through the central hole of the lower flange, and the upper edge of the rubber sleeve is clamped between the lower flange and the upper flange.

The following are a plurality of further improvements of the utility model:

the upper surface of the plate body part of the lower flange is provided with lower flange friction grains, the bottom surface of the cylinder body part of the upper flange is provided with upper flange friction grains, and the upper edge of the rubber sleeve is clamped between the lower flange friction grains and the upper flange friction grains.

And a sealing ring is arranged between the cylinder body part of the lower flange and the cylinder body part of the upper flange.

The upper flange is provided with a radial hole communicated with the central hole, a jacking mechanism is installed in the radial hole, and the jacking mechanism is used for jacking the oil pipe hanger in the central hole.

The jacking mechanism comprises a screw rod, one end of the screw rod is in threaded connection with the radial hole, and the other end of the screw rod extends out of the radial hole.

The outer end of the radial hole is in threaded connection with a pressing cap, and the pressing cap is sleeved on the screw rod.

And a sealing filler is arranged in the radial hole, and the inner end of the pressing cap is abutted against the sealing filler.

And a sealing ring groove is formed in the bottom surface of the lower flange.

Wherein, the top of the upper flange is fixed with a guard plate.

And bolts are connected between the upper flange and the through holes of the plate body of the lower flange.

After the technical scheme is adopted, the beneficial effects of the utility model are as follows:

because the utility model discloses a well head is proclaimed oneself and is prevented blowout preventer includes the sealed gum cover by flange subassembly cramping, the flange subassembly includes upper flange and lower flange that link together, upper flange, lower flange all include plate body portion, barrel body portion, centre bore, plate body portion periphery is provided with the plate body through-hole, upper flange barrel body portion and lower flange barrel body threaded connection, the gum cover body of sealed gum cover runs through lower flange centre bore, the gum cover upper edge cramp of sealed gum cover is between lower flange and upper flange; wear to establish the flange joint hole of plate body through-hole and well head through the bolt, will the utility model discloses a well head is proclaimed oneself and is prevented spouting device and install behind the well head, sealed gum cover is fixed in well head department, when playing oil pipe, pull down the oil pipe hanger from oil pipe, can lift oil pipe, sealed gum cover utilizes self elasticity tightly to embrace the oil pipe outer wall, when preventing pressure oil blowout, the oil that also prevents the oil pipe outer wall effectively is taken out the well head, prevent blowout and well head pollution, needn't dismantle after the installation, follow-up workover operation need not install sealed gum cover alone again, replace manual operation, the intensity of labour has been reduced, operation efficiency and operation security have greatly been improved. The utility model discloses a blowout preventer is proclaimed oneself to well head, small, light in weight, easy and simple to handle, work efficiency is high, is the effective instrument that realizes continuity of operation in the low pressure operation.

Drawings

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

in the figure: 1. sealing the steel ring; 2. a lower flange; 3. sealing the rubber sleeve; 4. a bolt; 5. an upper flange; 6. a guard plate; 7. an oil pipe hanger; 8. a screw rod; 9. pressing the cap; 10. a seal ring; 11. a wellhead.

Detailed Description

It should be noted that, unless otherwise specified or limited, the terms "connected," "connecting," and the like in the description herein should be construed broadly, and may include, for example, direct connection between two elements or indirect connection through an intermediate medium, and those skilled in the art will understand the specific meaning of the terms as they are used in a specific context.

The following non-limiting embodiments of the present invention will be described in further detail with reference to the accompanying drawings.

As shown in figure 1, the utility model discloses well head is proclaimed oneself blowout preventer includes: flange assembly and packing unit 3. The flange assembly comprises a lower flange 2 and an upper flange 5 which are connected together, the upper flange 5 and the lower flange 2 respectively comprise a plate body part, a cylinder body part and a central hole, and plate body through holes for penetrating bolts are formed in the periphery of the plate body part; the cylinder body part of the upper flange 5 is provided with an external thread, and the cylinder body part of the lower flange 2 is provided with an internal thread which is connected and matched with the external thread of the upper flange 5; a seal ring 10 is provided between the cylindrical portion of the lower flange 2 and the cylindrical portion of the upper flange 5. The bottom surface of the lower flange 2 is provided with a sealing ring groove for containing the sealing steel ring 1, so that reliable sealing between the lower flange and a well mouth 11 is ensured.

Wherein, sealed gum cover 3 includes the gum cover body and sets up in gum cover body upper end and the gum cover upper edge of outside extension, and the gum cover body runs through the centre bore of lower flange 2, and the gum cover is gone up along the clamp pressure between lower flange 2 and upper flange 5.

In order to prevent the sealing rubber sleeve 3 from rotating and firmly and reliably clamp the sealing rubber sleeve, a lower flange friction line is arranged on the upper surface of the plate body part of the lower flange 2, an upper flange friction line is arranged on the bottom surface of the cylinder body part of the upper flange 5, and the upper edge of the rubber sleeve is clamped between the lower flange friction line and the upper flange friction line.

The upper flange 5 is provided with a radial hole communicated with the central hole, and a jacking mechanism is installed in the radial hole and used for jacking an oil pipe hanger 7 in the central hole. Wherein, the tight mechanism optimal design in top is: the screw rod 8 is included, one end of the screw rod 8 is in threaded connection with the radial hole, and the other end of the screw rod 8 extends out of the radial hole; the outer end of the radial hole is in threaded connection with a pressing cap 9, and the pressing cap 9 is sleeved on the screw rod 8; sealing filler is arranged in the radial hole, and the inner end of the pressing cap 9 is abutted against the sealing filler. In order to ensure reliable tightening of the tubing hanger 7, a plurality of tightening mechanisms as described above may be provided at intervals in the circumferential direction of the upper flange 5, and will not be shown in detail.

Wherein, in order to ensure firm and reliable connection, a bolt 4 is connected between the upper flange 5 and the plate body through hole of the lower flange 2. On top of the upper flange 5, a shield 6 is further fixed.

When the self-sealing blowout preventer of the well mouth is arranged on the well mouth 11 (original well mouth), the installation and fixation of the device and the original well mouth can be conveniently realized by the bolt 4 penetrating through the plate body through hole and the flange connecting hole of the well mouth 11; the sealing rubber sleeve 3 is fixed at the wellhead, when the oil pipe is lifted, the screw rod 8 and the pressing cap 9 of the jacking mechanism are rotated, the oil pipe hanger 7 is loosened, the oil pipe hanger 7 is detached from the oil pipe, and the oil pipe can be lifted; in the process of lifting the oil pipe, the sealing rubber sleeve 3 tightly embraces the outer wall of the oil pipe by utilizing self elasticity, prevents the pressure oil from being sprayed out, effectively prevents the oil on the outer wall of the oil pipe from being brought out of a well mouth, and prevents well blowout and well mouth pollution. The utility model discloses an unnecessary dismantlement after the blowout preventer installation is proclaimed oneself to the well head, follow-up workover operation need not install alone again and seals the gum cover, replaces manual operation, has reduced intensity of labour, has greatly improved operating efficiency and operation security. The utility model discloses a blowout preventer is proclaimed oneself to well head, small, light in weight, easy and simple to handle, work efficiency is high, is the effective instrument of realization continuity of operation in the low pressure operation.

The foregoing is an example of the preferred embodiments of the present invention, and the parts not described in detail are known in the art, and the scope of the present invention is defined by the appended claims, and all equivalent modifications based on the teachings of the present invention are within the scope of the present invention.

Claims

1. The blowout preventer is proclaimed oneself to well head, its characterized in that, the blowout preventer is proclaimed oneself to the well head includes:

the rubber sleeve comprises a rubber sleeve body and an upper rubber sleeve edge, the upper rubber sleeve edge is arranged at the upper end of the rubber sleeve body and extends outwards, the rubber sleeve body penetrates through the center hole of the lower flange, and the upper rubber sleeve edge is clamped between the lower flange and the upper flange.

2. The wellhead self-sealing blowout preventer according to claim 1, wherein the upper surface of the plate body part of the lower flange is provided with lower flange friction grains, the bottom surface of the cylinder body part of the upper flange is provided with upper flange friction grains, and the rubber sleeve is clamped between the lower flange friction grains and the upper flange friction grains along the upper edge.

3. The wellhead self-sealing blowout preventer of claim 1, wherein a seal ring is disposed between the barrel portion of the lower flange and the barrel portion of the upper flange.

4. The wellhead self-sealing blowout preventer according to claim 1, wherein the upper flange is provided with a radial hole communicated with the central hole, and a tightening mechanism is installed in the radial hole and used for tightening a tubing hanger positioned in the central hole.

5. The wellhead self-sealing blowout preventer according to claim 4, wherein the tightening mechanism comprises a lead screw, one end of the lead screw is in threaded connection with the radial hole, and the other end of the lead screw extends out of the radial hole.

6. The wellhead self-sealing blowout preventer according to claim 5, wherein the outer end of the radial hole is connected with a pressing cap in a threaded manner, and the pressing cap is sleeved on the screw rod.

7. The wellhead self-sealing blowout preventer according to claim 6, wherein a sealing packing is disposed in the radial hole, and an inner end of the pressure cap abuts against the sealing packing.

8. The wellhead self-sealing blowout preventer according to claim 1, wherein the bottom surface of the lower flange is provided with a sealing ring groove.

9. The wellhead self-sealing blowout preventer according to claim 1, wherein a guard plate is fixed on the top of the upper flange.

10. The wellhead self-sealing blowout preventer according to claim 1, wherein bolts are connected between the through holes of the plates of the upper flange and the lower flange.