JPH0344618B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to the transport of dissimilar fluids on the ocean floor and in wells.

"Conventional Technology" For example, in oil, geothermal and metal exploration, drilling wells are drilled.

However, since the wells are deep, at least 500 to 5,000 meters, mud can be lost during drilling.

When this happens, the circulating mud for drilling in the borehole escapes into the ground from the hole wall, making it impossible to maintain the head of the mud and causing the hole wall to collapse.

Therefore, a chemical solution that has the effect of filling the water gap is supplied to this water loss location.

Conventionally, as this supply means, pipe transport has been used, in which the chemical solution is transported after the preceding muddy water through an inserted supply pipe, resulting in a so-called multiphase fluid, or in the above-mentioned pipe transport, Sludge prevention chemical solution and boring mud water differ in specific gravity, viscosity, surface tension, etc., so for example, in the case of a chemical solution that does not spread, when descending through muddy water, the chemical solution may not mix with the boring mud water and form a cohesive fluid mass. A fold is formed at the rear of the pipe, and the fold is vibrated as it descends. At the rear part of the fold, the flow mass breaks off and later becomes a small lump that floats in the pipe. This method is unsuitable for chemical solutions that have an increased contact surface area and are inconvenient to come into contact with muddy water during transportation. Since this is difficult to predict, a method is used in which the chemical solution is loaded into a capsule and suspended within the borehole to be transported to the point of water leakage.

``Problem to be solved by the invention'' However, with any of the above methods, when supplying chemical liquid, once the drilling rod is pulled out,
Since it is necessary to insert the supply pipe or suspend the capsule, the extra time and effort required to pull out the drilling rod occurs each time, so it is difficult for the users to take up the process and carry it out. There are many cases.

"Means for Solving Problems" and "Operation" The present invention was made in view of the above circumstances, and its gist is that a dissimilar fluid such as a water loss prevention chemical solution with a vertically divided configuration is used. The loaded capsule, which has a ring-shaped cross section, is attached to the drilling rod in a manner that it hugs the drilling rod, and is lowered to a predetermined position in the drilling hole using the drilling rod as a guide.Then, a breaking weight is attached to the bottom plate of the capsule, which is made of an easily breakable material. act through a messenjar to dissipate the loading liquid, and by configuring a transportation device for this purpose, it is possible to supply the chemical liquid while the drilling rod remains in place without having to pull it out. be.

"Example" Hereinafter, this will be explained in detail based on the example drawings. Figures 1a to 1c are partially exploded to show the usage mode of a capsule loaded with a different type of fluid such as a chemical solution for preventing sludge in the means of the present invention. A perspective view, a plan view of the canopy, a detailed view of the cutting table fixed to the wire line, Figures 2a and b are explanatory views of the multi-stage configuration when increasing the capacity of the capsule according to the scale of lost mud, FIG. 3 is an explanatory diagram of the structure of the intermediate unit at that time, and is an explanatory diagram of the operating procedure of the excavating rod in the means of the present invention.

In FIG. 1, a capsule 1 loaded with a different type of fluid such as a chemical solution for preventing sludge according to the present invention has a ring-shaped cross section in order to be attached to a drilling rod 2 in a hugging manner as shown in the figure. The container is divided in the vertical direction, and the divided parts are removably joined with pins 3.

Thus, the capsule 1 can descend into the wellbore using the drilling rod 2 as a guide.

The bottom plate 5 of the capsule bottom 4, which is preferably tapered in order to reduce the resistance during descent, is made of a material that is easily broken by impact, such as glass.

Above the bottom plate 5, a weight 6 for breaking the bottom plate which provides a falling impact as the above-mentioned breaking means is suspended by a hanging string 7.

The suspension string 7 is pulled out of the capsule 1 through an opening such as a balancer opening 9 attached to the capsule canopy 8.

The balancer opening 9 allows the medicinal solution 10 in the capsule to
This is provided in order to bring the capsule into contact with the liquid (muddy water) 11 in the borehole, balance the pressure inside and outside the capsule, and avoid situations such as destruction due to pressure difference.
When the chemical solution 10 is hydroreactive, it is configured to be small so as to make it as difficult to react as possible.

The capsule canopy 8 has other wire lines 12.
A hanging tool 13 for fastening and a chemical solution loading port 14 are provided.

In the figure, 15 is a cap of the loading port 14. The illustrated example capsule 1 is a single unit.

A cutting table 16 is fixed to the wire line 12 in the form of a collar, as shown in Fig. c, and a knife edge 17 is attached to the upper surface of the cutting table 16. Fastening 18
be done.

Reference numeral 19 in the figure is a cylinder-shaped messenger through which the wire line 12 can pass through, and as it descends along the wire line 12 from the wellhead of the borehole, it forms a knife edge 17 as shown by the chain line in the figure.
The suspension string 7 is cut by the impact, and the bottom plate breaking weight 6 falls toward the bottom plate 5. The bottom plate 5 is also broken by the impact, and the chemical solution 10 is diffused into the borehole.

Figure 2 shows the measures to be taken when it is desired to increase the amount of chemical liquid to be transported depending on the scale of water loss.
It is preferable to have a multistage configuration consisting of a, 1b, and 1c.

Figure b shows the cylindrical cut intermediate unit 1b mentioned above.
The canopy and bottom plate have chemical communication holes 2 for communicating between the upper and lower units.
0 and a hanging string 7 through hole 21 are provided,
Although a detailed explanation will be omitted, the transportation amount can be adjusted by integrating the upper and lower units 1a and 1c using conventional means.

Figure 3 shows how to use the diaphragm device.

That is, in the present invention, since the chemical solution 10 is diffused without pulling out the drilling rod 2, it is conceivable that if the chemical solution 10 reacts with the slime at the bottom of the hole and solidifies, the drilling blade will not be able to rotate.

Therefore, prior to capsule 1's descent, drilling rod 2 was
As shown in the figure, the capsule 1 is raised to a predetermined level, and then the capsule 1 is lowered.

As shown in the figure, the chemical solution 10 that has been diffused at a predetermined level above the bottom of the hole descends in the form of a lump toward the water leakage point and solidifies, but the drilling rod 2
There will be no problem in restarting the excavating blade 2a.

At this time, the excavating blade 2a automatically removes the capsule 1.
This will serve as a descent limit stopper.

``Effects of the Invention'' As described above, according to the means of the present invention, it is possible to transport the chemical solution without having to pull out the drilling rod, and it is possible to quickly process the chemical solution without requiring much time and effort, which is extremely suitable in practice.

[Brief explanation of drawings]

Figures 1a to 1c are a partially exploded perspective view showing a usage mode of a capsule loaded with a different type of fluid such as a water loss prevention chemical solution in the means of the present invention, a plan view of the canopy, and a detailed illustration of a cutting table fixed to a wire line. Figures 2a and 2b are explanatory diagrams of the multi-stage configuration for increasing the capacity of the capsule according to the scale of water loss, and Figure 3 is an explanatory diagram of the configuration of the intermediate unit in that case. It is an explanatory diagram of the operation procedure of the excavating rod. 1...Different fluid loading capsule, 2...Drilling rod,
3...Pinning, 4...Capsule bottom, 5...Bottom plate, 6
...Weight for destroying the bottom plate, 7... Hanging string, 8... Capsule canopy, 9... Balancer opening, 10... Chemical solution, 11... Liquid, 12... Wire line, 13... Hanging tool, 14... Chemical solution loading port, 15... Cap , 16...
Cutting table, 17... Knife edge, 18... Fastening, 19
...Metsenjar, 20...Medical solution communication hole, 21...
Hole for passing the hanging cord through.

Claims (1)

[Scope of Claims] 1. A capsule with a ring-shaped cross section that is divided in the vertical direction and is divided in the vertical direction of loading with a different type of fluid such as a water loss prevention chemical solution and has a bottom plate made of an easily destructible material is attached to the excavation rod in a manner that it hugs the excavation rod. The wire is suspended from the tip of the wire line, and is lowered to a predetermined position in the drilling hole using the drilling rod as a guide, and then a breaking weight is suspended from the bottom plate disposed at the upper part of the capsule. A fixed hanging cord is passed over a fixed cutting table in front of the line capsule, and the wire line is cut by lowering and colliding with the cutting table, causing the weight to collide with the bottom plate. A method for transporting different types of fluids on the seabed or in a well, the method comprising dispersing the charged liquid. 2 A capsule loaded with a different type of fluid such as a chemical solution to prevent water loss is divided in the vertical direction so that it can be attached to the drilling rod in a hugging manner, and the cross section is ring-shaped, and the bottom plate is made of an easily breakable material such as glass material. The weight for destroying the bottom plate inside the capsule shall be suspended with a hanging string through a balancer opening provided in the canopy, and the hanging string shall be placed on a cutting table fixed to the wire line for hanging the capsule. A device for transporting different types of fluids on the seabed or in wells, characterized in that it is fixed by passing over a protruding knife edge to the wire line, and a wire line is attached to a wire line for cutting a suspension string.