JPH044071Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial Application Field" This invention relates to an improvement in the suspension mechanism of capsules for transporting drug solutions.

"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 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 having the effect of filling the water gap is supplied to this water loss location.

Conventionally, this supply method used pipe transport, in which the chemical liquid was transported after the muddy water that preceded it, resulting in a so-called multiphase fluid, but recently, a method has been adopted in which a capsule filled with the chemical liquid is introduced. I'm getting used to it.

As a means of dispersing the chemical solution from the capsule that reached the bottom of the hole, methods were initially proposed such as destroying the entire capsule and opening a valve attached to the tip, but the former method of destroying the entire capsule was proposed. The latter requires a rupturing mechanism (a rupturing device such as an explosive) that must be handled with care, and some rupturing devices may destroy the hole wall; water pressure in the hole, muddy water,
There is a risk that the valve may not open reliably due to excavated slime, etc., and in view of the above circumstances, the applicant has
A bottom plate made of easily breakable material such as glass, ceramics, or reinforced cloth is attached to the cylinder, and a weight for destroying the bottom plate is suspended from the top of the cylinder using a hanging string, and the hanging string is connected to a wire line for suspending the cylinder. By passing it over a fixed cutting table and attaching it to the wire line, and attaching a wire line to the wire line for cutting the sling, it is possible to reliably achieve chemical diffusion at the desired depth without destroying the hole wall. We offer different types of capsules.

An example of this type will be introduced based on FIGS. 2a and 2b.

In Fig. a, numeral 1 is a cylindrical body serving as a container into which a chemical solution 2 for preventing water loss is loaded, and is a bottomed body having a bottom plate 3 made of an easily breakable material such as glass, ceramic, reinforced cloth, or the like.

The bottom plate 3 is assembled separately from the cylindrical body 1, and is inserted into the stepped inner diameter enlarged part 1a formed at the lower end of the cylinder 1, pressed and locked, and then inserted into the stepped inner diameter enlarged part 1a. Short cylindrical screw fastener 4 to be screwed into the interior
It can be removably assembled by fastening and crimping through the .

The reason why the screw fastener 4 is made into a short cylindrical body is to form the tip of the cylindrical body 1 to ensure a diffusion path for the chemical solution 2 from the bottom plate 3.

In addition, 5 in the figure is a sealing ring inserted in the above-mentioned crimping part.

Above the bottom plate 3, a weight 6 for breaking the bottom plate which provides a falling impact as a breaking means is suspended by a hanging string 7 at a position where a predetermined fall distance is ensured.

In the figure, reference numeral 8 denotes a wire line for suspending the cylinder 1, and the wire line 8 has a cutting table 9 as shown in figure b.
is fixed like a brim, and a knife edge 1 is installed on the top surface.
0 is attached, and the hanging string 7 is passed over this knife edge 10 and fixed 11 to the side surface of the stand.

In the figure, reference numeral 12 is a cylindrical mesenger through which the wire line 8 can pass, and as it descends from the borehole wellhead along the wire line 8, it collides with the knife edge 10, and the hanging cord 7
(The impact force of the messenger gear 12 is extremely large due to acceleration, and the suspension string 7 can actually be cut even without the knife edge 10.), and the bottom plate breaking weight 6 hits the bottom plate 3. The bottom plate 3 is destroyed by the impact of the drop, and the chemical solution 2 is diffused into the borehole. In the figure, reference numeral 13 denotes a fly-out prevention string that is added to prevent the weight 6 from breaking the bottom plate 3 and then jumping out of the cylinder 1 and damaging the cutting blade of the excavator in a later process.

Therefore, the pore walls are not destroyed by the explosion, and the chemical solution diffusion function is not affected by water pressure, muddy water, excavation slime, etc. in the environment outside the capsule, and reliable diffusion can be expected.

"Problems to be Solved by the Invention" However, as described above, in the suspension mechanism in which the cylindrical body 1 is directly suspended by the wire line 8, the following difficulties arise.

That is, when the wire line 8 is wound and unwound with a winch during the capsule insertion operation, twist occurs in the wire line 8, and the capsule rotates within the hole due to the twist. The chemical liquid is stirred, and in the case of isocyanate-based chemical liquids, the reaction is accelerated, making it difficult to set the gel time, etc., and it may become impossible to stop water at a predetermined location.

Further, at the same time as the twisting, deflection occurs, which causes a kink and becomes entangled with the hanging string 7 that suspends the weight 6 or the pop-out prevention string 13, resulting in a shaky state, and the hanging string 7 is cut by the action of the mesh gear 12. However, if the weight 6 does not fall and the bottom plate 3 is destroyed, a situation arises in which the chemical solution is not released.

``Means for solving problems'' and ``effects'' This proposal was made in view of the above circumstances, and its gist is that the end of the wire line is rotatably installed in the center of the cutting table via a bearing. Assuming that the cylinder is fixed to the core shaft and suspended and supported by a suspension band taken out from the cutting table, the rotational movement caused by the twisting of the wire line is dealt with by the rotation of the core shaft. The point is that it is intended to eliminate the above-mentioned non-operation situation without reaching the point of failure.

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

In FIGS. 1a to 1b, figure a is a diagram of a wire line to which the suspension mechanism of the present invention is applied, and figure b is a diagram of the essential parts of the suspension mechanism of the present invention.

The capsule shown in this figure is different from the one shown in FIG. 2 in that the weight for breaking the bottom plate remains inside the cylinder without being thrown out of the cylinder by a locking action after the bottom plate is destroyed.

In the figure, 14 is a cylindrical body with a tapered lower end serving as a container for loading water prevention chemical solution, and is made of glass, ceramic, etc.
It is a bottomed body having a bottom plate 15 made of an easily broken material such as reinforced cloth. The cylinder wall contains lead or the like to prevent buoyancy from occurring when the capsule comes into contact with the water surface inside the hole.

The bottom plate 15 is assembled separately from the cylindrical body 14, and is inserted into the stepped inner diameter portion formed at the lower end of the cylindrical body 14, and then pressed and locked.
It is removably assembled by fastening and crimping a short cylindrical screw fastener 16 that is internally screwed onto the inner diameter stepped portion.

The reason why the screw stopper 16 is a short cylinder is that the cylinder 1
This is to ensure a diffusion path for the chemical solution from the bottom plate 15 by forming the tube tip portion 4.

Above the bottom plate 15, there is a weight 1 with wings 17a for breaking the bottom plate that produces a falling impact as a breaking means.
7 is suspended by a hanging string 18 at a position where a predetermined fall distance is secured. In the illustrated example, the hanging cord 18
passes through the cutting table 20 and has its base end fixed to the upper surface of the cutting table 20. Dimensionally, the weight 17 loosely fits its tip into the short cylindrical body 16 and the wings 17a.
is engaged with the tapered portion of the lower end of the cylindrical body 14.

After operation, it remains in the cylinder 14 while ensuring a drug diffusion path. The wings 17a also have the effect of accelerating the fall.

19 in the figure is a wire line.
A cutting table 20 is fixedly installed in the shape of a brim at the tip.

The fixed part is shown in detail in figure b.

That is, a bearing 20 is placed at the center of the cutting table 20.
A rotatable core shaft 20b is provided via a, and the tip of the wire line 19 is fixedly attached 20c to the core shaft 20b.

However, due to the twisting of the wire line 19, the core shaft 20b that is integrated with the wire line 19 rotates;
The rotational movement is caused by the cutting table 2 by the bearing 20a.
The cutting table 20 body does not rotate because the rotation is not transmitted to the cutting table 20 body. The hanging band 2 is suspended from the main body of the cutting table 20.
1, . . . are taken out, and the cylinder body 14 is suspended and supported by the suspension bands 21, .

Therefore, the cylindrical body 14 does not rotate due to twisting of the wire line 19.

Moreover, as a result of this, the cylinder 14 is suspended with the hands spread out, and the cutting table 20 and the cylinder 14 are heavy.
The gap between the two can be made smaller, and stability during the effect can be expected.

In the figure, reference numeral 22 is a cylindrical shaft through which the wire line 19 can pass, and as it descends along the wire line 19 from the wellhead of the borehole, it collides with the cutting table 20 and suspends the hanging cord 1.
8 is cut, and the weight 17 for destroying the bottom plate is attached to the bottom plate 1.
5, and the impact caused the bottom plate 15 to fall.
is destroyed, and the chemical solution is diffused into the borehole.

``Effect of the invention'' As described above, according to the present invention, the cylinder body will not be rotated due to twisting of the wire line, there will be no stirring of the chemical solution, and there will be no possibility of the bottom plate breaking weight not falling due to the entanglement of the hanging string. , it is possible to quickly supply the chemical solution.

[Brief explanation of the drawing]

In Figures 1 a to b, Figure a is a diagram of the wire line with the suspension mechanism of the present invention, Figure b is a diagram of the main parts of the suspension mechanism of the present invention, and Figures 2 a and b are of the conventional suspension mechanism. It is an explanatory view, an enlarged detailed view of a portion surrounded by a line b in figure a. 14...Cylinder body, 15...Bottom plate, 16...Short cylinder screw fastener, 17...Weight, 17a...Bottom plate destruction wing, 18...Hanging string, 19...Wire line, 20...Cutting table , 20a...Bearing, 2
0b...Core shaft, 20c...Fixing, 20d...Fitting hole, 21...Hanging band, 22...Messenger.

Claims (1)

[Scope of utility model registration request] A chemical solution characterized in that the tip of the wire line is fixed to a rotatable core shaft provided at the center of the cutting table via a bearing, and the cylinder is suspended and supported by a hanging band carried out from the cutting table. Suspension mechanism for transport capsules.