CN219365996U - Oil way joint and blowout preventer - Google Patents

Abstract

The utility model discloses an oil passage joint and a blowout preventer. The oil passage joint is used for the blowout preventer and includes a joint main body; the outer wall of the joint main body is provided with a first external thread, and the interface of the oil passage of the blowout preventer is provided with an enlarged diameter. , and the inner wall of the interface is provided with a first internal thread for connecting with the first external thread; the joint body has a communication hole connected at both ends, and the hole wall of the communication hole is provided with a second internal thread, and the second internal thread is used for Connect the external threaded head of the oil pipeline. When it is necessary to disassemble the oil pipeline, it is only necessary to unscrew the external thread head of the oil pipeline from the oil joint, which avoids the direct threaded connection between the oil joint and the interface on the blowout preventer, which is easy to be disassembled frequently Disadvantages that cause damage to the BOP interface. When the second thread of the oil circuit joint is damaged, it only needs to be replaced with a new oil circuit joint, which improves the service life of the oil circuit joint.

Description

An oil joint and a blowout preventer

technical field

The utility model relates to the technical field of petroleum engineering drilling well control equipment, in particular to an oil circuit joint and a blowout preventer.

Background technique

After kick, overflow and blowout occur in oil and gas drilling operations, closing the blowout preventer at the wellhead and performing throttling-blowout-killing operations are the most important operations related to the protection of oil and gas resources and the safety of ground personnel, equipment and the environment It is also one of the most dangerous operations in the entire oil and gas extraction.

Annular blowout preventer is also called universal blowout preventer, because it can seal various shapes of drilling tools and annular tools, and has a large amount of rubber storage and is resistant to erosion. Therefore, when overflow or blowout occurs, it is the most commonly used , The wellhead blowout preventer, which is the first to be closed, is the most important well control device to ensure reliable well shut-in.

At present, when the "open" and "close" oil circuit interfaces of the annular blowout preventer used in the field leave the factory, they are directly manufactured as NPT box (US standard 60-degree taper pipe thread box) on the shell, and are inspected and maintained in the factory , When using external oil pipelines in experiments and on site, a double-male short-circuit plus union adapter is assembled first, and it is removed from the casing when the well is completed.

Due to frequent assembly and disassembly, the female buckle made on the housing is easily damaged. One maintenance plan after damage is: weld a male-female conversion joint on the shell of the annular blowout preventer. However, this is easy to affect the strength of the shell, which is not allowed by the industry standard. As a temporary emergency measure, the safety protection procedures for on-site hot welding are very complicated, and even welding cannot be performed because there are no hot conditions. Another solution is to return the blowout preventer to the original factory. After dismantling it, perform preheating and heat preservation, etc., for welding in strict accordance with the welding procedure qualification procedures, re-make the buckle, and pass the strength test before putting it into use. But it needs to pay a huge maintenance and transportation cost, and the loss outweighs the gain.

Therefore, how to improve the service life of the casing oil circuit interface is a technical problem to be solved urgently by those skilled in the art.

Utility model content

In view of this, the first purpose of the present utility model is to provide an oil circuit joint to increase the service life of the housing oil circuit joint.

The second purpose of the utility model is to provide a blowout preventer.

In order to achieve the above-mentioned first purpose, the utility model provides the following scheme:

An oil joint used for a blowout preventer, including a main body of the joint;

The outer wall of the joint body is provided with a first external thread, the interface of the oil circuit of the blowout preventer is provided with an enlarged diameter, and the inner wall of the interface is provided with a first internal thread for connecting with the first external thread ;

The joint body has a communication hole with both ends connected, and the hole wall of the communication hole is provided with a second internal thread, and the second internal thread is used to connect the external thread head of the oil pipeline.

In a specific embodiment, the communication hole includes a first through hole and a second through hole;

One end of the first through hole is used to communicate with the interface, the other end of the first through hole communicates with one end of the second through hole, and the second internal thread is arranged in the second through hole on the wall of the hole;

A position where the first through hole communicates with the second through hole forms a limit platform for limiting the head of the external thread.

In another specific embodiment, the communicating hole further includes a third through hole, one end of the third through hole communicates with the end of the second through hole away from the first through hole;

The diameter of the third through hole is larger than the diameter of the end of the second through hole communicating with the third through hole.

In another specific embodiment, the second through hole is a tapered hole, and the end with a larger diameter communicates with the third through hole, and the end with a smaller diameter communicates with the first through hole.

In another specific embodiment, the oil circuit joint further includes a screwing part arranged on the outer wall of the joint body and used to screw the joint body to the interface;

When the joint main body and the interface are installed in place, the twisting part abuts against the shell outer wall of the blowout preventer.

In another specific embodiment, the twisting part is an outer hexagon, and the size of the outer hexagon is the same as that of the nut hexagon of the bolt connected to the blowout preventer.

In another specific embodiment, a sealing groove is provided on the end surface of the joint body facing the oil circuit interface, and a sealing ring is installed in the sealing groove;

When the joint main body and the oil passage interface are installed in place, the sealing ring is in sealing contact with the step surface of the sealing step formed by the interface and the oil passage.

In another specific embodiment, the sealing ring installed on the joint body and the sealing ring installed on the oil pipeline are interchangeable.

Various embodiments according to the present invention can be combined arbitrarily according to needs, and the embodiments obtained after these combinations are also within the scope of the present invention, and are part of the specific embodiments of the present invention.

Without being limited to any theory, it can be seen from the above disclosure that the oil joint provided by the utility model, when in use, connects the outer wall of the main body of the joint with the interface of the oil line of the blowout preventer with threads, and the oil line to be connected The external thread head of the connector is connected with the communication hole of the joint body through the second internal thread, so that the oil line is indirectly connected to the oil line of the blowout preventer.

When it is necessary to disassemble the oil pipeline, it is only necessary to unscrew the external threaded head of the oil pipeline from the oil joint, which avoids the direct threaded connection between the oil joint and the interface on the blowout preventer, which is easy to be disassembled frequently Disadvantages that cause damage to the BOP interface. When the second internal thread of the oil circuit joint is damaged, it is sufficient to replace the oil circuit joint with a new one, thereby improving the service life of the oil circuit joint.

In order to achieve the above-mentioned second purpose, the utility model provides the following scheme:

A blowout preventer, including a casing and an oil joint as described in any one of the above;

The housing is provided with an oil passage communicating with the inner cavity of the housing, and the oil passage interface of the oil passage is set to expand in diameter;

The oil passage joint is threadedly connected with the oil passage interface.

In a specific embodiment, the blowout preventer also includes a flange and a top cover;

The top cover is mounted on the housing;

The flange is located at the bottom of the housing, and the flange is provided with a flange hole connected with the device to be connected.

Since the blowout preventer provided by the utility model includes any one of the oil joints mentioned above, the beneficial effects of the above oil joints are included in the blowout preventer provided by the utility model.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the present utility model, and those skilled in the art can also obtain other drawings according to these drawings on the premise of not paying novel efforts.

Fig. 1 is the schematic diagram of the half-section structure of the oil joint provided by the utility model;

Fig. 2 is the schematic diagram of the half-section structure of the blowout preventer provided by the utility model;

FIG. 3 is a schematic diagram of a partially enlarged structure of FIG. 2;

Fig. 4 is a schematic diagram of a partially enlarged structure of the oil circuit of the blowout preventer provided by the present invention.

Among them, in Figure 1-Figure 4:

Oil joint 100, blowout preventer 1000, joint body 101, first external thread 101a, oil passage 201, interface 201a, first internal thread 201a-1, communication hole 101b, second internal thread 101b-1, first channel Hole 101b-2, second through hole 101b-3, limit platform 101c, third through hole 101b-4, twisting part 102, sealing ring 103, stepped surface 202, housing 200, flange 300, top cover 400 , bolt 500, rubber core 600, piston 700, spacer ring 800.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. The utility model can be realized in many different forms, and is not limited to the embodiment described in this embodiment. The purpose of providing the following specific embodiments is to facilitate a clearer and more thorough understanding of the disclosure of the utility model, wherein the words indicating orientation such as below are only for the positions of the structures shown in the corresponding drawings.

It can be understood that the terms used here are only used to describe specific embodiments, not to limit the utility model. As used herein, the singular forms "a" and "" are intended to include the plural unless the context clearly dictates otherwise. Further, when used in this specification, the terms "comprising" and/or "comprising" indicate the existence of features, integers, steps, elements and/or components, but do not exclude one or more other features, integers, steps, The presence or addition of elements, components and/or combinations thereof. The subsequent description of the specification is a preferred embodiment for implementing the utility model, but the description is for the purpose of illustrating the general principles of the utility model, and is not intended to limit the scope of the utility model. The scope of protection of the present utility model should be defined by the appended claims.

As shown in Figures 1-4, the first aspect of the utility model discloses an oil joint 100, which is used to install at the interface 201a of the blowout preventer 1000, replacing the interface 201a with the oil pipeline threaded connection, avoiding frequent The problem of damage to the interface 201a caused by the disassembly and assembly of the oil pipeline improves the service life of the blowout preventer 1000 .

The oil joint 100 includes a joint main body 101, and the joint main body 101 may be made of metal.

The outer wall of the joint main body 101 is provided with a first external thread 101a, that is, the outer wall of the joint main body 101 is provided with a male buckle. It should be noted that the first external thread 101a can be provided entirely on the outer wall of the joint main body 101, or only one section can be provided. This segment can be located at any position in the length direction of the joint body 101 .

As shown in Figures 3 and 4, the interface 201a of the oil passage 201 of the blowout preventer 1000 is enlarged in diameter. It should be noted that the diameter expansion refers to enlarging the cross-sectional dimension of the interface 201a to facilitate the installation of the joint body 101 .

The inner wall of the interface 201a is provided with a first internal thread 201a-1, that is, the inner wall of the interface 201a is provided with a box.

In the interface 201a, the first internal thread 201a-1 can be provided on all the inner walls, and the first internal thread 201a-1 can only be provided on a section of the inner wall in the length direction of the interface 201a, and this section can be located at any point in the length direction of the interface 201a. Location.

The first internal thread 201 a - 1 in the interface 201 a is connected with the first external thread 101 a on the joint body 101 , so as to realize the connection between the oil joint 100 and the interface 201 a of the blowout preventer 1000 .

The joint main body 101 has a communication hole 101 b connected at both ends, and the hole wall of the communication hole 101 b is provided with a second internal thread 101 b - 1 , that is, a box is provided in the joint main body 101 .

It should be noted that the entire length of the communication hole 101b can be provided with the second internal thread 101b-1, that is, the communication hole 101b is a threaded hole, of course, a section of the length of the communication hole 101b can also be provided with the second internal thread 101b -1, this segment can be located at any position in the length direction of the communicating hole 101b.

One end of the oil pipeline to be connected is provided with an external thread head, and the external thread head is connected to the second internal thread 101b-1 to realize the connection between the oil pipeline and the blowout preventer 1000 .

When it is necessary to disassemble the oil pipeline, it is only necessary to unscrew or screw in the external thread head of the oil pipeline from the oil joint 100, avoiding the direct threading of the oil joint 100 and the interface 201a on the blowout preventer 1000 The connection method has the disadvantage that the interface 201a of the blowout preventer 1000 is easily damaged due to frequent disassembly and assembly.

When the second internal thread 101b-1 of the oil joint 100 is damaged, it is enough to replace the oil joint 100 with a new one, which increases the service life of the interface 201a of the oil line 201 and further improves the service life of the blowout preventer 1000.

It should be noted that the oil joint 100 in the present invention is not limited to be used on the blowout preventer 1000, but also can be used on other devices that need to be disassembled from the interface 201a.

In some embodiments, the communication hole 101b includes a first through hole 101b-2 and a second through hole 101b-3 respectively arranged along the length direction of the joint body 101, specifically, the first through hole 101b-2 and the second through hole The through hole 101b-3 is arranged coaxially, which is convenient for processing and manufacturing on the one hand, and facilitates liquid circulation on the other hand. It should be noted that the coaxial arrangement of the first through hole 101b-2 and the second through hole 101b-3 is only a specific embodiment of the present invention, and in practical applications, the first through hole 101b-2 and the second through hole 101b-3 can also be arranged coaxially. The second through hole 101b-3 is not coaxially arranged or the like.

One end of the first through hole 101b-2 is used to communicate with the interface 201a, the other end of the first through hole 101b-2 communicates with one end of the second through hole 101b-3, and the second internal thread 101b-1 is arranged on the second through hole. The hole wall of the hole 101b-3, that is, the second through hole 101b-3 is a threaded hole.

The position where the first through hole 101b-2 communicates with the second through hole 101b-3 forms a limiting platform 101c for limiting the head of the external thread.

Specifically, the aperture diameter of the first through hole 101b-2 is smaller than the aperture diameter of the end of the second through hole 101b-3 communicating with the first through hole 101b-2, therefore, between the first through hole 101b-2 and the second through hole 101b- The communication part of 3 forms a limiting platform 101c, and the limiting platform 101c can be abutted with the external thread head of the oil pipeline, which plays the role of limiting the screwing depth of the external thread head, and facilitates the installation of the oil pipeline in place.

Further, the utility model discloses that the communication hole 101b also includes a third through hole 101b-4, and one end of the third through hole 101b-4 communicates with the end of the second through hole 101b-3 away from the first through hole 101b-2 .

The diameter of the third through hole 101b-4 is larger than the diameter of the end of the second through hole 101b-3 connected to the third through hole 101b-4, so as to facilitate guiding the head of the external thread into the second through hole 101b-3.

Further, the utility model discloses that the second through hole 101b-3 is a tapered hole, and the end with a larger diameter communicates with the third through hole 101b-4, and the end with a smaller diameter communicates with the first through hole 101b-2.

Correspondingly, the shape of the external thread head is adapted to the shape of the tapered hole, that is, the external thread head is a tapered thread head, which is convenient for the external thread head to be screwed into the second through hole 101b-3.

In some embodiments, the oil joint 100 further includes a screwing part 102, specifically, the screwing part 102 is disposed on the outer wall of the joint body 101, and is used to screw the joint body 101 into the interface 201a.

When the joint main body 101 and the interface 201a are installed in place, the screwing part 102 abuts against the outer wall of the casing 200 of the blowout preventer 1000 . That is to say, the screwing part 102 facilitates screwing the joint body 101 into the interface 201 a on the one hand, and controls the screwing depth of the joint body 101 on the other hand.

Specifically, the utility model discloses that the twisting part 102 is an outer hexagon.

It should be noted that setting the twisting part 102 as an outer hexagonal structure is only a specific embodiment of the present invention. In practical applications, the twisting part 102 can also be set as a handle on the outer wall of the joint body 101 .

In this embodiment, the twisting part 102 is an outer hexagon as an example. The outer hexagon is the same size as the nut hexagon of the bolt 500 connected to the blowout preventer 1000. The same wrench can be used for the oil circuit joint 100, which is convenient and quick.

The on-site tightening wrench for the flange 300 of the blowout preventer 1000 can be used when assembling and disassembling the oil joint 100, which is not only accurate, but will not damage the outer hexagon on the main body 101 of the joint, and the tightening torque can ensure that the screw thread forms a reliable seal .

In some embodiments, since the interface 201a of the oil passage 201 of the blowout preventer 1000 is enlarged in diameter, the aperture at the interface 201a is larger than the aperture of the oil passage 201, so a seal is formed at the connection between the interface 201a and the oil passage 201 steps.

A sealing groove is formed on the end surface of the joint main body 101 facing the interface 201 a of the oil passage 201 , and the sealing ring 103 is installed in the sealing groove.

When the joint body 101 and the oil passage 201 interface 201a are installed in place, the sealing ring 103 is in sealing contact with the step surface 202 of the sealing step, so as to ensure the tightness of the connection between the oil passage joint 100 and the oil passage 201 .

Further, the utility model discloses that the sealing ring 103 installed on the joint body 101 and the sealing ring installed on the oil pipeline are interchangeable, and both are O-shaped sealing rings.

When the sealing ring 103 on the joint main body 101 is damaged and needs to be updated, the spare sealing ring configured on the oil pipeline can be directly selected; if there is no spare sealing ring, the spare external joint of the control system of the configured spare pipeline or the BOP 1000 can be used temporarily Take it off for emergency use.

As shown in FIG. 2 , the second aspect of the present invention provides a blowout preventer 1000 , including a casing 200 and an oil joint 100 as in any one of the above-mentioned embodiments.

The housing 200 is provided with an oil passage 201 communicating with the inner cavity of the housing 200 , and the interface 201 a of the oil passage 201 is enlarged in diameter, and the oil passage joint 100 is screwed to the interface 201 a of the oil passage 201 .

Specifically, the blowout preventer 1000 is an annular blowout preventer 1000, and the casing 200 is provided with two ports 201a, one port 201a is used to open the oil passage 201, and the other port 201a is used to close the oil passage 201.

Since the blowout preventer 1000 provided by the utility model includes the oil joint 100 in any one of the above-mentioned embodiments, the beneficial effects of the above oil joint 100 are all provided by the blowout preventer 1000 provided by the utility model. included.

In some embodiments, the blowout preventer 1000 further includes a flange 300 and a top cover 400 , specifically, the top cover 400 is installed on the casing 200 .

The flange 300 is located at the bottom of the housing 200, and the flange 300 is provided with a flange 300 hole connected with the device to be connected, and the hole of the flange 300 is detachably connected with the device to be connected through the cooperation of bolts 500 and nuts.

Furthermore, the utility model also discloses that a rubber core 600 , a piston 700 , an isolation ring 800 and the like are respectively installed in the casing 200 .

It should be noted that, in the present application, the terms "first" and "second" are only used for description purposes, and should not be understood as indicating or implying relative importance.

It should also be noted that relational terms such as first and second are used only to distinguish one entity or operation from another, and do not necessarily require or imply any relationship between these entities or operations. This actual relationship or sequence. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

The above description of the disclosed embodiments enables those skilled in the art to realize or use the utility model. Various modifications to the embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

The above are only preferred embodiments of the present utility model, and it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present utility model, some improvements and modifications can also be made. It should be regarded as the protection scope of the present utility model.

Claims (10)

1. An oil joint (100), characterized in that it is used for a blowout preventer (1000), including a joint main body (101); The outer wall of the joint main body (101) is provided with a first external thread (101a), the interface (201a) of the oil passage (201) of the blowout preventer (1000) is enlarged in diameter, and the interface (201a) A first internal thread (201a-1) for connecting with the first external thread (101a) is provided on the inner wall; The joint main body (101) has a communication hole (101b) connected at both ends, and the hole wall of the communication hole (101b) is provided with a second internal thread (101b-1), and the second internal thread (101b- 1) External threaded head for connecting oil line. 2. The oil joint (100) according to claim 1, characterized in that, the communicating hole (101b) comprises a first through hole (101b-2) and a second through hole (101b-3); One end of the first through hole (101b-2) is used to communicate with the interface (201a), and the other end of the first through hole (101b-2) is connected to the second through hole (101b-3) One end of the through hole is connected, and the second internal thread is arranged on the hole wall of the second through hole (101b-3); A position where the first through hole (101b-2) communicates with the second through hole (101b-3) forms a limit platform (101c) that limits the head of the external thread. 3. The oil joint (100) according to claim 2, characterized in that, the communication hole (101b) further includes a third through hole (101b-4), and the third through hole (101b-4) One end of the second through hole (101b-3) is in communication with the end away from the first through hole (101b-2); The diameter of the third through hole (101b-4) is larger than the diameter of the end of the second through hole (101b-3) connected to the third through hole (101b-4). 4. The oil joint (100) according to claim 3, characterized in that, the second through hole (101b-3) is a tapered hole, and the end with a larger diameter is in contact with the third through hole (101b -4) Communication, the smaller end of the hole communicates with the first through hole (101b-2). 5. The oil joint (100) according to claim 1, characterized in that, it also includes an outer wall arranged on the joint main body (101) and used for screwing the joint main body (101) to the said joint main body (101). The twisting part (102) of the interface (201a); When the joint main body (101) and the interface (201a) are installed in place, the twisting part (102) abuts against the outer wall of the blowout preventer (1000). 6. The oil joint (100) according to claim 5, characterized in that, the twisting part (102) is an outer hexagon, and the outer hexagon is connected to the bolts connected to the blowout preventer (1000) (500) nut hexagons are the same size. 7. The oil circuit joint (100) according to claim 1, characterized in that a sealing groove is opened on the end surface of the joint body (101) facing the interface (201a) of the oil circuit (201), and the sealing groove The groove is used to install the sealing ring (103); When the joint main body (101) and the oil passage (201) interface (201a) are installed in place, the sealing ring (103) seals against the interface (201a) and the oil passage (201) to form a On the step surface (202) of the sealed step. 8. The oil joint (100) according to claim 7, characterized in that the sealing ring (103) installed on the joint body (101) is interchangeable with the sealing ring installed on the oil pipeline . 9. A blowout preventer (1000), characterized in that it comprises a casing (200) and the oil joint (100) according to any one of claims 1-8; The housing (200) is provided with an oil passage (201) communicating with the inner cavity of the housing (200), and the interface (201a) of the oil passage (201) of the oil passage (201) is expanded in diameter set up; The oil joint (100) is threadedly connected to the interface (201a). 10. The blowout preventer (1000) according to claim 9, further comprising a flange (300) and a top cover (400); The top cover (400) is installed on the housing (200); The flange (300) is located at the bottom of the casing (200), and the flange (300) is provided with a flange hole connected with the device to be connected.