CN211851757U

CN211851757U - Polished rod break-off blowout preventer

Info

Publication number: CN211851757U
Application number: CN201922479117.3U
Authority: CN
Inventors: 陈其亮; 朱安江; 王新期; 冯孝强; 蔡婷婷
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-11-03
Anticipated expiration: 2029-12-31

Abstract

The utility model provides a polished rod takes off blowout preventer absolutely. The polished rod breaking blowout preventer comprises: the shell is connected to the upper end of the oil pumping pipe and sleeved outside the polish rod; the packing piece is arranged in the shell and is provided with a hole penetrating through the packing piece from top to bottom, and the polish rod penetrates through the hole and forms sliding seal with the packing piece; the contact piece can be in contact fit with the polish rod; and the linkage mechanism can drive the blowout prevention part to move from a rest position to a blowout prevention position when the polished rod is separated from the contact part, the blowout prevention part seals the hole in the blowout prevention position, and the linkage mechanism and the blowout prevention part are positioned below the packing part. Use the technical scheme of the utility model, after the polished rod takes off absolutely, the contact loses the polished rod and supports forward motion under the spring action for prevent spouting the piece and bounce under the spring action and stop up because of the pore that the polished rod dropped the formation, thereby reach the outside spun passageway of pipeline crude oil in the sealing well, consequently can avoid crude oil to spout the pollution that causes outward.

Description

Polished rod break-off blowout preventer

Technical Field

The utility model relates to an oil field development field particularly, relates to a polished rod takes off blowout preventer absolutely.

Background

The oil pumping machine is a machine for exploiting oil, and is commonly called a head knocking machine. Pumping units are the most prominent lifting devices in sucker-rod pumping systems, which pump oil by reciprocating a piston at the oil reservoir.

The sucker rod is a slender rod of the pumping well, the upper end of the sucker rod is connected with a polished rod, and the lower end of the sucker rod is connected with an oil well pump to play a role in transmitting power. The length of a single sucker rod is 7.62 or 8 meters and 9.14 meters, the material of the sucker rod is generally low carbon alloy steel, the low carbon alloy steel is subjected to quenching and tempering treatment, the low carbon alloy steel is connected with one another by internal threads in an oil pipe and extends to a piston at an underground oil layer, and oil is pumped by reciprocating motion. The length of the current oil well is about two kilometers, for example, a victory oil field, and the deepest oil well is more than three kilometers.

The polish rod of the pumping well is a special sucker rod for realizing the connection between the sucker rod and the rope hanger. Because the sucker rod is positioned at the uppermost part of the sucker rod and the stress is the largest, the diameter of the polish rod is larger than that of the sucker rod, the grade of steel is higher, and the surface is smoother. The main functions are as follows: firstly, the packing box is combined with the packing in the packing box to seal a well mouth and prevent oil, gas and water from leaking; secondly, realizing the connection transition between the sucker rod and the rope hanger; thirdly, completing the indicator diagram test; fourthly, various operations of the wellhead are realized, such as pump bumping, pump hanging adjustment and the like.

The packing box is used for sealing the wellhead dynamic sealing device of the annular space between the oil pipe and the polished rod, and adopts multi-stage sealing and high pressure resistance. The packing box is used for providing sliding seal between the polish rod and the packing box when the polish rod moves up and down along with the power of the oil pumping unit.

In order to fix the polish rod on the top of the polished rod hanger, a polish rod fixing clip is usually installed on the top of the polish rod to complete the connection between the polish rod and the polished rod hanger. The polish rod can break and drop because the polish rod runs up and down under high load for a long time. The polish rod is broken and falls into the well directly, the uppermost part of the packing box on the Christmas tree is exposed out of a pore canal with the diameter of 30mm, crude oil in an oil collecting pipeline is sprayed out along the pore canal, large-area pollution on the oil pumping equipment and the ground around a well site is caused, and the normal production of the oil well is influenced. If the pollution is found out to be untimely, the longer the spraying time is, the greater the pollution is, the greater the treatment difficulty in the later period is, a professional team is required to use various special vehicles for treatment in the treatment process, the treatment time is long, the cost is high, and the environment is damaged greatly.

A polish rod sealer apparatus and a packing for sealing a polish rod are provided in chinese utility model patent publication No. CN 207568535U. The polish rod sealer apparatus includes: the sealing assembly is sleeved on the periphery of the polished rod and comprises a packing box and a packing positioned in the packing box, and the packing is provided with a first through hole for the polished rod to pass through and an accommodating cavity separated from the first through hole; the first pressing piece is sleeved on the periphery of the polished rod to tightly press the packing in the packing box; one or more confession fat passageway, with hold the chamber intercommunication, when for holding the chamber and pouring into solid sealed fat into, solid sealed fat can exert the effort that makes it hold the polished rod tightly for the packing. However, the document does not provide a technical solution for preventing blowout after the polish rod is broken.

It is an unforeseeable and unsound problem when the polish rod breaks. Therefore, in the normal production of the oil field, only corresponding matched products can be developed, the exposed pore channel can be timely blocked after the polish rod is broken off, and the serious pollution caused by the broken polish rod can be avoided, so that the normal production of the oil field well is ensured. In the prior art, the packing box carried by the oil well only has single sealing function.

Therefore, there is a need for a polished rod break-out blowout preventer that can break away after the polished rod inevitably breaks away.

SUMMERY OF THE UTILITY MODEL

The main object of the utility model is to provide a polished rod takes off blowout preventer absolutely to solve the pollution problem that crude oil among the prior art spouts the cause outward.

In order to realize the above purpose, the utility model provides a polished rod takes off blowout preventer absolutely, include: the shell is connected to the upper end of the oil pumping pipe and sleeved outside the polish rod; the packing piece is arranged in the shell and is provided with a hole penetrating through the packing piece from top to bottom, and the polish rod penetrates through the hole and forms sliding seal with the packing piece; the contact piece can be in contact fit with the polish rod; and the linkage mechanism can drive the blowout prevention part to move from a rest position to a blowout prevention position when the polished rod is separated from the contact part, the blowout prevention part seals the hole in the blowout prevention position, and the linkage mechanism and the blowout prevention part are positioned below the packing part.

Further, the height of the linkage mechanism and the blowout preventer is not higher than that of the packing.

Furthermore, the side of the packing piece is provided with a lifting part, the lifting part is meshed with a gear which is rotatably fixed in the shell, and the rotation of the gear drives the packing piece to ascend.

Further, the gear is connected to a control member located outside the housing, the control member controlling rotation of the gear.

Further, the linkage mechanism includes: a push plate connected to the contact; a push spring connected to the push plate to provide a contact force of the contact member with the polish rod and to move the contact member toward a center line of the hole when the polish rod is separated from the contact member; the turnover plate is connected to the blowout preventer and can push the blowout preventer to move from a rest position to a blowout prevention position; and a flap spring that is triggered by the push plate when the contact moves toward the center line of the hole, thereby providing a pushing force to the flap that moves from the rest position to the blowout prevention position.

Further, the blowout preventer seals the hole from the lower side.

Further, the blowout preventer is pushed by the flap to rotate from a rest position to a horizontal blowout prevention position.

Furthermore, the lifting part and the linkage mechanism are positioned on two sides of the polished rod.

Further, the contact member is a pulley.

Further, the lifting portion is in contact with the gear when the packing is in the working position.

By applying the technical scheme of the utility model, when the oil well is normally produced, the contact element in the polish rod breaking blowout preventer can be clung to the polish rod to normally roll under the action of the spring, and the contact element (preferably a pulley) can not damage the outside of the polish rod; when the polish rod is broken and falls into the well, the pulley can lose the support of the polish rod, the pulley can move forward under the action of the spring, and when the pulley moves forward, the blowout prevention part can bounce up under the action of the spring to block a pore channel formed by the falling of the polish rod, so that a channel for outwards spraying crude oil in the well and a pipeline is sealed, and the pollution caused by the outwards spraying of the crude oil can be effectively avoided.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 shows a cross-sectional view of an embodiment of a polished rod break-off blowout preventer in accordance with the present invention; and

fig. 2 shows a perspective view of an embodiment of a polished rod break-off blowout preventer in accordance with the present invention.

Wherein the figures include the following reference numerals:

1. a polish rod; 10. a packing member; 12. an aperture; 14. a lifting part; 30. a housing; 34. a gear; 36. a control member; 40. a blowout preventer; 50. a linkage mechanism; 51. pushing the plate; 52. a push spring; 53. turning over a plate; 90. a contact member.

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. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In order to achieve the above object, the present invention provides a polished rod breaking blowout preventer, as shown in fig. 1, the polished rod breaking blowout preventer of the present embodiment comprises: a housing 30 connected to the upper end of the oil pumping pipe and sleeved outside the polish rod; the packing piece 10 is arranged in the shell 30 and is provided with a hole 12 penetrating through the packing piece 10 from top to bottom, and the polish rod 1 penetrates through the hole 12 and forms sliding seal with the packing piece 10; a contact member 90 capable of contact fitting with the polish rod 1; and a blowout preventer 40 and a linkage 50 mounted within the housing 30, the linkage 50 being capable of driving the blowout preventer 40 to move from a rest position to a blowout prevention position in which the blowout preventer 40 seals the bore 12 when the polished rod 1 is disengaged from the contact member 90, wherein the linkage 50 and the blowout preventer 40 are located below the packing 10.

When the oil well is normally produced, the contact element 90 of the polished rod breaking blowout preventer can normally roll tightly against the polished rod, and the outside of the polished rod cannot be damaged. When the polished rod 1 is broken and dropped into a well, the contact element 90 loses the support of the polished rod 1 and moves forwards, and when the contact element 90 moves forwards, the linkage mechanism 50 can drive the blowout preventing element 40 to move from a rest position to a blowout preventing position, so that a hole formed by dropping of the polished rod 1 is blocked, and a channel for crude oil in the well and a pipeline to be sprayed outwards is sealed.

Advantageously, the linkage 50 is at a height no greater than the height of the packing 10 from the blowout preventer 40.

Thus, the linkage 50 and the blowout preventer 40 do not interfere with maintenance and replacement of the packing 10 from above.

Advantageously, the packing 10 has a lifting portion 14 on a side thereof, and the lifting portion 14 is engaged with a gear 34 rotatably fixed in the housing 30, so that the packing 10 can be lifted by the rotation of the gear 34.

The packing 10 is raised by rotating the gear 34 when replacing the packing 10 without the aid of any other tools. The operation of taking out the packing part 10 can be easily completed by an operator, no potential safety hazard exists, and the labor intensity of workers can be reduced.

Advantageously, the gear 34 is connected to a control 36 located outside the casing 30, so that the rotation of the gear 34 can be controlled by the control 36.

As shown in fig. 2, the control member 36 is located outside of the housing 30, and is directly or indirectly connected to the gear 34 within the housing 30. The control element 36 controls the rotation of the gear 34, the rotation of the gear 34 can enable the packing 10 to ascend or descend, and an operator can complete the extraction of the old packing 10 and the installation of a new packing 10 without completely disassembling the polish rod disconnecting blowout preventer.

Advantageously, the linkage 50 comprises: a push plate 51 connected to the contact 90; a push spring 52 connected to the push plate 51 to provide a contact force of the contact 90 with the polished rod 1 and to move the contact 90 toward the center line of the hole when the polished rod 1 is separated from the contact 90; a flap 53 connected to the blowout preventer 40 and capable of urging the blowout preventer 40 to move from a rest position to a blowout prevention position; and a flap spring capable of being triggered by the push plate 51 when the contact 90 moves toward the centerline of the hole 12, thereby providing a pushing force to the flap 53 that moves from the rest position to the blowout prevention position.

Advantageously, the blowout preventer 40 seals the bore 12 from the underside.

This can enhance the sealing of the blowout preventer 40 by internal well pressure.

Advantageously, the blowout preventer 40 is pushed by the flap 53, rotating from the rest position to the horizontal blowout prevention position.

The horizontal blowout prevention position places the internal pressure of the well in an orthogonal relationship with the blowout preventer 40 so that the blowout preventer 40 can be stabilized in the blowout prevention position.

Advantageously, the lifting portion 14 and the linkage 50 are located on both sides of the polish rod 1.

The lifting portions 14 respectively located at both sides of the polish rod 1 and the link mechanism 50 do not interfere with each other in operation, causing the polish rod break-off blowout preventer to fail.

Advantageously, the contact 90 is a pulley.

Rolling friction is formed between the pulley and the polished rod 1, which is small relative to static friction, so that abrasion of the contact 90 to the polished rod 1 can be suppressed.

Advantageously, the lifting portion 14 is in contact with the gear 34 when the packing assembly 10 is in the operating position.

Therefore, in the normal operation state of the oil well, the gear 34 can also provide a supporting force to the lifting portion 14 and further to the packing 10, so that the packing 10 is stably fixed in its operation position without swaying and fluctuating.

In research and development experiment, will the utility model discloses a polished rod takes off blowout preventer absolutely is arranged in the ordinary well head of rod-pumped well, through trying 10 well installations to suppress 1.5MPa with the pump truck, steady voltage 1 hour does not stab leak, can be safe through the experiment, adorn fast and get the packing, reduces staff intensity of labour. Therefore, the device has the advantages of convenience in installation and strong field applicability.

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: when the oil well is normally produced, a contact element in the polish rod breaking blowout preventer can normally roll tightly against the polish rod under the action of a spring, and the contact element (preferably a pulley) cannot damage the outside of the polish rod; when the polish rod is broken and falls into the well, the pulley loses the support of the polish rod, the pulley moves forward under the action of the spring, and when the pulley moves forward, the blowout prevention part bounces up under the action of the spring to block a pore passage formed by falling of the polish rod, so that a channel formed by outwards spraying crude oil in the well and in a pipeline is sealed, and the pollution caused by outwards spraying crude oil can be avoided.

Further, the packing is raised by rotating the gear when the packing is replaced, without any other tool. The operation of taking out the packing part can be easily completed by an operator, no potential safety hazard exists, and the labor intensity of workers can be reduced.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a polished rod breaks and takes off blowout preventer which characterized in that includes:

the shell (30) is connected to the upper end of the oil pumping pipe and sleeved outside the polish rod (1);

the packing piece (10) is installed in the shell (30) and is provided with a hole (12) penetrating through the packing piece (10) from top to bottom, and the polish rod (1) penetrates through the hole (12) and forms sliding seal with the packing piece (10);

a contact member (90) capable of being in contact fit with the polish rod (1);

a blowout preventer (40) and a linkage (50) mounted within the housing (30), the linkage (50) being configured to drive the blowout preventer (40) from a rest position to a blowout prevention position in which the blowout preventer (40) seals the bore (12) when the polished rod (1) is disconnected from the contact member (90), wherein the linkage (50) and the blowout preventer (40) are located below the packing (10).

2. The polish rod breakout blowout preventer of claim 1, wherein the linkage (50) and the blowout preventer (40) are no higher than the packing (10).

3. The polish rod breakout blowout preventer according to claim 1, wherein the packing (10) has a lifting portion (14) on a side thereof, the lifting portion (14) being engaged with a gear (34) rotatably fixed in the housing (30), rotation of the gear (34) driving the packing (10) to rise.

4. The polish rod break blowout preventer of claim 3, wherein the gear (34) is connected to a control (36) located outside the housing (30), the control (36) controlling rotation of the gear (34).

5. The polish rod break-out blowout preventer of claim 1, wherein the linkage mechanism (50) comprises:

a push plate (51) connected to the contact member (90);

a push spring (52) connected to the push plate (51) to provide a contact force of the contact member (90) with the polish rod (1) and to move the contact member (90) toward a center line of the hole (12) when the polish rod (1) is separated from the contact member (90);

a flap (53) connected to the blowout preventer (40) capable of urging the blowout preventer (40) to move from the rest position to the blowout prevention position; and

a flap spring that is triggered by the push plate (51) when the contact member (90) moves toward the centerline of the hole (12) to provide a thrust force to the flap (53) that moves from the rest position to the blowout prevention position.

6. The polish rod break-out blowout preventer according to claim 1 or 5, wherein the blowout preventer (40) seals the bore (12) from the underside.

7. The polish rod break blowout preventer of claim 5, wherein the blowout preventer (40) is urged by the flap (53) to rotate from the rest position to the horizontal blowout preventing position.

8. The polish rod break-out blowout preventer according to claim 3, wherein the lifting part (14) and the linkage mechanism (50) are located on both sides of the polish rod (1).

9. The polish rod break blowout preventer of claim 1 or 5, wherein the contact member (90) is a pulley.

10. The polish rod break blowout preventer of claim 3, wherein the lifting portion (14) is in contact with the gear (34) when the packing assembly (10) is in the service position.