KR20000004697A - Elbow for connecting pipes - Google Patents

Abstract

PURPOSE: An elbow for connecting pipes is provided to minimize the corrosion caused by particles of high speed and high pressure that flows along a pipe without using a lead. CONSTITUTION: An elbow for connecting two pipes has:an opening(20) having a fluid opening(22); a gateway(30) having the exit(32) of the fluid curved in a specific angle from the opening(22); a shock-absorbing hole(41) having the end shut tight toward the opposite direction of the opening(22) through the exit(32), extended from the opening(22).

Description

Elbows for pipe connection

(Technology)

The present invention relates to an elbow for pipe connection, and more particularly to an elbow for connecting a pipe for handling high pressure particles, such as a mud pipe for transporting high-pressure drilled particles ejected during the drilling operation.

(Background)

In recent years, due to the rapid industrialization and industrial development, the limited global resources are gradually reaching the bottom, and stable production and supply of crude oil is a very important issue. Therefore, in recent years, with the development of oil mining technology on the seabed, large oil companies are desperately needing the drilling ships equipped with drilling equipment suitable for the development of small-scale marginal fields and deep-field oil fields that have lost economic feasibility. In this regard, the government is actively seeking to develop such a solution.

The drilling vessel is equipped with drilling equipment for drilling, and the drilling equipment is equipped with a mud lump treatment apparatus for processing mud lumps such as mud, sand, and gravel obtained by excavation work. The mud pipe for conveying the mudrump is piped.

Mud pipes must be transported at high pressure and high speed, because mud pipes must transport rough and sharp mudrumps of considerable size and weight, such as mud, sand, and gravel. Due to the continuous erosion effect, the pipe becomes thinner and ruptures frequently. Particularly, the elbow parts used in the inevitable bend in the mud pipe piping are mud high pressure mudrumps from the blow-out preventer (BOP) due to abnormal pressure generated during drilling. It is the part that receives erosion more intensively than any other part when coming up the pipe.

3 is a cross-sectional view of an elbow widely used in a conventional mud pipe piping. As shown, the conventional elbow 100 has an approximately L shape including an inlet 120 to which an upstream mud pipe 110 is connected and an outlet 140 to which a downstream mud pipe 130 is connected. And is generally joined to the two mud pipes 110 and 130 by welding. The mudrump flows in the direction indicated by the arrow in the elbow 100, and the lead 150 is filled on the opposite side of the inlet 120 through which the mudrump is introduced to withstand the flow of the high pressure fluid.

However, the conventional elbow 100 of such a configuration, due to the vulnerability to the erosion of the mud lump, various problems are caused as follows. That is, when the thickness of the elbow (100) is thinned by the erosion of the first mudrump to repair, the mud pipes connected to the elbow (100) must be cut, which requires excessive repair time and the use of a firearm of the cutter. Concerns about an explosion accident exist. Second, since the lead 150 charged in the elbow 100 is continuously eroded and leaked by the mud lump to withstand the momentary high pressure, it is necessary not only to carry out the re-conduit work at any time to recharge the lead, but also lead to the ocean It causes environmental problems due to spills. Third, even if the elbow is worn locally, the entire elbow must be replaced.

Accordingly, it is an object of the present invention to provide an elbow for pipe connection that can minimize the erosion caused by particles of high speed and high pressure flowing along the pipe without using lead.

Another object of the present invention is to provide an elbow for pipe connection, in which the maintenance work of the pipeline is simple and only necessary parts can be replaced.

1 is a cross-sectional view showing an example of an elbow for pipe connection according to the present invention;

2 is a cross-sectional view showing another example of an elbow for pipe connection according to the present invention;

3 is a cross-sectional view of an elbow widely used in conventional mud pipe piping.

* Description of the symbols for the main parts of the drawings *

1: Elbow for pipe connection 3: Upstream pipe

5: downstream pipe 20: inlet

21, 31, 53: stud bolt 22: inlet

30: outlet 32: outlet

40: buffer part 41: buffer port

50: blind flange 51: buffer groove

An object of the present invention described above, in the elbow for connecting pipes connecting two pipes, the inlet of the upstream pipe is bolted and the inlet of the fluid, the downstream pipe is bolted and bent at an angle at the inlet It is achieved by an elbow for pipe connection, characterized in that it comprises an outlet portion formed with an outlet of, and a buffer portion extending from the inlet and passing through the outlet, the buffer portion having a closed end opposite to the inlet.

Hereinafter, an elbow for pipe connection according to the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are merely illustrative of the elbows for pipe connection according to the invention, but are not intended to limit the scope of the invention.

1 is a cross-sectional view showing an example of an elbow for pipe connection according to the present invention, Figure 2 is a cross-sectional view showing another example of an elbow for pipe connection according to the present invention. As shown, the elbow 1 according to the present invention has a configuration in which the inlet portion 20, the outlet portion 30, and the buffer portion 40 are integrally formed.

The inlet portion 20 is formed with an inlet 22 through which fluid flows, and an upstream pipe 3 is connected thereto. The present invention adopts a structure for fastening the upstream pipe (3) with a stud bolt 21 for the assembly between the elbow (1) and the pipe, for this purpose the bolt around the inlet (22) of the inlet (20) A plurality of balls 23 are formed. The flange 4 is welded to the connecting end of the upstream pipe 3 for bolting with the inlet 20. Accordingly, when the stud bolt 21 is tightened through the gasket 24 while the flange 4 of the upstream pipe 3 is aligned with the inlet 20, the upstream pipe 3 is tightly sealed to the elbow 1. Is fastened.

The outlet part 30 is formed with an outlet 32 through which fluid flows out, and the downstream pipe 5 is fastened with a stud bolt 31, for this purpose, around the outlet 32 of the outlet part 30. A plurality of bolt holes 33 are formed. The flange 6 is welded to the connecting end of the downstream pipe 5 for bolting with the inlet 30, so that the flange 6 of the downstream pipe 5 is aligned with the outlet 30. When the stud bolt 31 is tightened through the gasket 34, the downstream pipe 5 is tightly fastened to the elbow 1.

Since the elbow 1 of the present invention is for changing the flow direction of the fluid, the inlet 22 and the outlet 32 are bent at an angle of less than 180 degrees, for example 90 degrees or more. FIG. 1 shows an example in which the angles of the inlet 22 and the outlet 32 are at right angles, and FIG. 2 shows an example of about 135 degrees.

A shock absorbing portion 40 is formed on the opposite side of the inlet portion 20, and a shock absorbing portion 41 is formed in the shock absorbing portion 40 with a closed end. The buffer unit 40 is a structure for buffering the impact of the particles having a considerable size and weight, such as mud lumps made of sand, gravel to the elbow (1), the buffer hole 41 is the inlet ( On the extension of 22 it passes through the outlet 32 and is opposite the inlet 22. Therefore, the fluid flowing into the inlet 22 flows into the buffer opening 41 before exiting to the outlet 32.

As indicated by the arrow, the fluid flowing from the upstream pipe 3 through the inlet 22 of the elbow 1 is discharged through the outlet 32 to the downstream pipe 5 by its hydraulic pressure and flow rate. When the shock absorbing portion 41 of the shock absorbing portion 40 is hit, the impact force of the shock absorbing portion 41 of the shock absorbing portion 40 is significantly reduced. In other words, when the fluid introduced later attempts to hit the buffer 40, the fluid that has already flowed in and filled the buffer 41 of the buffer 40 is buffered, so that the fluid is The buffer opening 41 is smoothly U-turned.

According to the elbow 1 of the present invention, the erosion phenomenon due to the fluid can be substantially reduced by the action of the buffer portion 40, but the erosion to some extent can not be avoided when using the elbow for a long time, the erosion by the fluid The phenomenon is most severe at the distal portion of the buffer portion 40. Therefore, it is preferable that the end of the buffer portion 40 having the most erosion phenomenon is prefabricated to replace only this portion when erosion occurs.

That is, the buffer portion 40 is formed so that the opposite side of the inlet 22 penetrates the buffer port 41, and fastens the blind flange 50 to the end of the penetrated buffer port 41 to close the end do. Preferably, the buffer groove 51 is formed as a part of the buffer hole 41 by forming a buffer groove 51 on the extension line of the buffer hole 41 on the inner surface of the blind flange 50. A bolt hole 52 is formed around the buffer hole 41 of the buffer portion 40 so that the blind flange 50 can be fastened with the stud bolt 53 via the gasket 54.

According to the elbow for pipe connection according to the present invention described above, by a simple structure to form a buffer for buffering the flow of the fluid on the opposite side of the inlet 20, the fluid flows in, along the pipe without using lead There is an effect that can minimize the erosion of the elbow by the particles of the high speed and high pressure flowing. In addition, since the end of the shock absorbing part is replaceably closed by a blind flange, only the end of the shock absorbing part can be replaced in case of erosion damage, thereby making it easy to repair.

Claims (3)

In the pipe connection elbow 1 connecting two pipes, the inlet 20 in which the upstream pipe 3 is fastened to the bolt 21 and the inlet 22 of the fluid is formed, and the downstream pipe 5 is the bolt ( 31 an outlet portion 30 formed with an outlet 32 of fluid fastened and bent at an angle in the inlet 22, and extending from the inlet 22 to pass through the outlet 32 and into the inlet 22; Elbow for pipe connection, characterized in that it comprises a buffer unit 40 is integrally formed with a buffer port 41 is closed at the opposite end of the. According to claim 1, wherein the buffer port 41 of the buffer portion 40 is formed so that the opposite side of the inlet 22, the blind flange 50 is formed at the end of the passage buffer 41 An elbow for pipe connection, which is fastened by bolts 53. The elbow for pipe connection according to claim 2, wherein a buffer groove (51) is formed on an inner surface of the blind flange (50) on an extension line of the buffer hole (41).