JPH0349351B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a suspension structure for various weights in a capsule for transporting chemical liquids applied to a borehole.

``Conventional Technology'' For example, in oil, geothermal and metal exploration, drilling wells are drilled. However, since the well is at least 500 to 5,000 meters deep, water is lost during drilling. When this occurs, the circulating mud for drilling in the borehole escapes into the ground from the hole wall, and the head of the mud cannot be maintained, which may cause the hole wall to collapse.

Therefore, a chemical solution that has the effect of filling the gaps between water leaks is supplied to these locations. One such supply means is to attach a capsule filled with a chemical liquid to the tip of a wire line, insert it into a borehole, and diffuse the chemical liquid at a predetermined depth through various means.

The above-mentioned dissipation can be achieved by using a method in which a destruction weight suspended inside the capsule is released from the suspension and lowered to collide with the easily destructible wall at the bottom of the capsule to destroy it, or a method in which the destruction weight is suspended inside the capsule by a valve installed at the bottom of the capsule. This is done by releasing a hanging weight for opening the valve and lowering it to open the valve.

The case of destroying the easily destructible wall at the bottom of the capsule using the destructing weight will be explained with reference to FIG.

In the figure, reference numeral 10 denotes a capsule serving as a container into which the water loss prevention chemical solution 11 is loaded, and although the lower half is not shown, it is a bottomed body having a bottom plate made of an easily broken material such as glass, ceramics, or reinforced cloth.

At the top of the capsule 10, a weight 16 for destroying the bottom plate, which provides a falling impact as a breaking means, is suspended by a hanging string 4 at a position where a predetermined fall distance is ensured.

In the figure, a capsule 10 is suspended by a wire line 1 via a fixture 7.

The structure of the hanging portion of the weight 16, which is indicated by the encircled line in the figure, is shown in detail in FIG.

That is, a cutting table 2 is fixed in the shape of a collar in front of the capsule or the like of the wire line 1 from which the capsule or the like is suspended from the tip thereof, and a knife edge 3 is attached to the upper surface of the cutting table 2.
A hanging string 4 for suspending various weights is passed over the knife edge 3 and fixed 5 to the side surface of the cutting table 2. A cylindrical messenger gear 6 is attached to the wire line 1 so as to pass through its center, and the messenger gear 6 is lowered through the wire line 1 from the borehole well and collides with the knife edge 3. When the hanging string 4 is cut, the above-mentioned various weights are released from hanging and descend, so that the various methods of chemical liquid dispersion described above are activated.

``Problems to be solved by the invention'' However, the following difficulties can be seen in the above structure.

That is, the hanging cord 4 is placed on the cutting table 2 by passing over the knife edge 3 from the fastening 5 at its base end, but if it is slightly loosened, the knife edge 3
It is easy to come off, and a situation where cutting cannot be expected can easily occur.

``Means for Solving the Problems'' and ``Operations'' The present invention was made in view of the above circumstances, and its gist is to attach the sling to the wire line that runs vertically through the cutting table in the shape of a collar. The present invention is to provide a hanging structure in which reliable cutting can be performed without the hanging cord coming off the cutting table by hanging the cord around it and fixing its base end to the various weights.

"Example" This will be explained in detail below based on the drawings.

FIG. 1 is a diagram showing the suspension structure of the present invention when the suspension string is cut.

In the figure, 2' is a cutting table fixed to the wire line 1 in the shape of a collar, and it may be formed into a flat surface without a knife edge on the upper surface, or it may have one as shown in the figure. . This is because the collision force of Metsusenjia 6 is strong due to acceleration, and the collision force of Metsusenjia 6 is strong, and
The existence of this is due to the fact that it is not an essential requirement for disconnection. Reference numeral 4' denotes a hanging cord of the present invention which is fixed to the suspended object of various weights, and this rope has both ends fixed to the suspended object to form a ring shape. The sling 4' is attached to the wire line above the cutting table 2' by being looped around it like a collar.

Therefore, the top end loop portion of the hanging cord 4', which is under tension due to the suspended object, is wrapped around the wire line 1 and there is no risk of it coming off.

In the illustrated example, the cutting table 2' is configured to have a rectangular shape in plan, but this is more preferable because the suspension string 4' on which the tension acts is maintained on one predetermined side.

As described above, the top end loop portion of the hanging cord 4' is held on the cutting table 2', and when the messenger gear 6 descends as shown in the figure, it is sandwiched between the messenger string 6 and the cutting table 2'. The hanging cord 4' is then pressure cut.

``Effects of the Invention'' The present invention provides practical advantages that cannot be expected with conventional structures, such as a simple structure and no fear of the hanging cord coming loose.

[Brief explanation of drawings]

Figure 1 is a diagram of the suspension structure of the present invention when the suspension string is cut, Figure 2 is an explanatory diagram of the conventional suspension structure, and Figure 3 is a method for destroying the easily broken wall at the bottom of the capsule with a breaking weight. FIG. 1... Wire line, 2'... Cutting table, 4'...
Hanging string.

Claims (1)

[Claims] 1. Assemble the hanging strings of various weights for dispersing the chemical solution, which are attached to the capsule filled with the drug solution attached to the tip of the wire line, to the wire line on the cutting table installed in front of the capsule of the wire line. The suspension structure is such that the wire is cut by a wire line that is lowered and collides with the cutting table from the ground, and the hanging cord is hung like a collar around a wire line that runs vertically through the cutting table. A suspension structure for various weights in a capsule for transporting a drug solution, in which the proximal end thereof is fixed to the various weights together with the washer.