JPH0344620B2 - - 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 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 means for diffusing the drug solution from the capsule that has reached the bottom of the hole, methods have been proposed such as destroying the entire capsule and opening a valve attached to the tip.

``Problem to be solved by the invention'' However, the former method of destroying the entire structure requires a destruction mechanism (bursting device for explosives, etc.) that must be handled with care, and depending on the bursting device, the hole wall may be damaged. In addition, in the case of the latter method of opening the valve at the tip of the capsule, water pressure inside the hole, muddy water,
The valve may not open reliably due to excavation slime, etc.

Furthermore, in addition to the above points, there are few boring holes that are vertical, and in some places the drilling angle is 30 or 45 degrees, and the hole wall surface is not a smooth surface but an uneven wall. It exhibits the following.

Therefore, in order to ensure a smooth descent of the capsule, the capsule itself must have a guiding ability, and at depths of several hundreds or thousands of meters, high heat and pressure may cause the capsule to have difficulty connecting dissimilar parts. It is hoped that a solution will be found to solve the problem of gaps occurring due to expansion and contraction at joints, resulting in distortion after only one use, and damage to joints of parts, making repeated use impossible. The reality is that there are.

"Means for Solving Problems" and "Operation" The present invention was made in view of the above circumstances, and its gist is that the tip of the device is tapered when loaded with a different type of fluid such as a chemical solution to prevent water loss. The cylinder is lowered through the wire line to a predetermined position in the borehole, and then
A winged weight for breaking the bottom plate of a hanging rack above the cylinder is applied to the bottom plate made of an easily breakable material of the cylinder through a messenger gear, and the weight is retained and remains inside the cylinder to remove the charging liquid. A bottom plate made of easily breakable material such as glass, ceramics, reinforced cloth, etc. can be attached and detached to the stepped inner diameter part that is designed to carry out dispersion and recovery of the cylinder, and the structure of the transportation equipment used for this purpose is shaped at the tip of the lower end of the cylinder. are fastened and crimped using short cylinder screws, and on the other hand, a weight with wings for destroying the bottom plate is hung with a hanging string just below the crack in the soft lid at the top of the cylinder, and the hanging string is connected to a wire line for suspending the cylinder. A fixed cutting table is attached to the wire line, and a wire line is attached to the wire line for cutting the hanging cord.This ensures that the chemical solution is diffused at the desired depth without destroying the hole wall. In addition, the cylindrical body and the screw fastener are made of the same material, and the present invention provides a capsule that does not have the problem of being unable to be reused at the joining part of the parts even when subjected to high heat and high pressure. .

"Example" Hereinafter, this will be described in detail based on example diagrams.

Figures 1 a to d show the capsule of the transportation device of the present invention, where figure a is a schematic diagram of the overall configuration, figure b is an enlarged view of member b seen in figure a, figure c is an enlarged view of member c seen in figure a, and figure d is an enlarged view of member c seen in figure a.
The figure is an enlarged view of the member d in the direction of the arrow in figure a.

In Fig. a, 1 is a cylinder with a tapered lower end as a container for loading a water loss prevention chemical solution, and has a bottom plate 2 made of easily breakable material such as glass, ceramics, reinforced cloth, etc. It is the body. 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 2 is assembled separately from the cylindrical body 1, and is inserted into the stepped inner diameter portion formed at the tip of the lower end of the cylindrical body 1, pressed and locked, and then inserted into the stepped inner diameter portion. It is removably assembled by fastening and crimping a short cylindrical screw fastener 3 which is internally screwed onto the other end.

The reason why the screw fastener 3 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 from the bottom plate 2.

Above the bottom plate 2, a weight 5 with bottom plate breaking wings 5a which produces a falling impact as a breaking means is suspended by a hanging string 6 at a position where a predetermined fall distance is ensured. Dimensionally, the tip of the weight 5 fits loosely into the short cylindrical body 3, and the wings 5a are locked to the tapered portion of the lower end of the cylindrical body 1.

After activation, it remains within the cylinder 1 while ensuring a drug diffusion path. The wings 5a also have the effect of accelerating the fall.

In the figure, 4 is a wire line for suspending the cylinder 1, and a cutting table 7 is fixed to the wire line 4 in the shape of a brim.
The hanging cord 6 is passed over the upper surface and is fixed to the side surface of the stand. In the figure, 7a is a presser plate.

8 in the figure is cylindrical, with wire line 4 in the center.
When this wire descends from the borehole well mouth along the wire line 4, it collides with the cutting table 7, cutting the hanging cord 6, and the bottom plate breaking weight 5 falls towards the bottom plate 2. However, the bottom plate 2 is destroyed by the impact, and the chemical solution is diffused into the borehole.

In the figure, reference numeral 9 denotes a hanging tool that is disposed directly below the cutting table 7 and is interposed between the wire line 4 and the cylinder 1. As a result, the cylinder 1 is suspended with the hands spread out, resulting in increased weight and bulk. The distance between the cutting table 7 and the cylindrical body 1 can be reduced, and stability during descent can be expected.

In addition, 10 in the figure is a soft lid made of a soft sheet such as silicone rubber that covers the upper end opening of the cylinder 1. A hole 10a is formed in the soft lid 10 to allow direct contact between the loaded chemical solution and the muddy water outside. It automatically balances the internal and external pressure to avoid damage caused by pressure differences. The weight 5 is suspended directly below the soft lid 10. FIGS. 2a to 2d are procedural diagrams of the transportation method of the present invention. The cylindrical body 1 is lowered into the excavated hole 11 using the wire line 4 to the point where water is lost (Figure a).

Send Messenger 8 (Figure b).

The hanging string 6 is cut, the weight 5 acts on the bottom plate 2, and the chemical solution is dispersed (Fig. c).

The cylinder 1 is recovered with the weight 5 remaining inside the cylinder 1 (Figure d).

According to the means of the present invention described above, the hole wall is not ruptured by explosion, and the chemical solution diffusion function is not affected by water pressure, muddy water, excavation slime, etc. in the environment outside the capsule. We can expect reliable spread without any problems.

In addition, heat-resistant materials such as steel and FRP are used for the material of the cylinder 1, but if there is a risk of falling into the hole, it may remain in the hole and hinder drilling, so it must be made of a material that is difficult to break. It is better to avoid steel.

Also, if the inside of the hole is at room temperature or relatively low temperature (below 100°C), PVC or the like is good, and if the temperature is high (100°C or more), FRP or the like is good.

Since the cylindrical body 1 and the short cylindrical screw fastener 3 constitute a joint part, if they are made of the same material, the problems caused by the difference in expansion and contraction mentioned above can be avoided. .

[Effects of the Invention] As described above, according to the present invention, it is possible to completely eliminate situations such as destruction of the borehole wall and inability to diffuse the chemical solution, and transport the chemical solution, which is extremely suitable.

Moreover, after collection, it can be reused by reattaching the bottom plate 2, which is advantageous in terms of cost.

Furthermore, since the weight for destroying the bottom plate is configured so that there is no risk of it escaping out of the cylinder after being activated, there is no need to attach a string that must be attached with a predetermined amount of deflection to prevent it from escaping. This is preferable since it is free from such inconveniences.

[Brief explanation of drawings]

1A to 1D show a capsule of the transportation device of the present invention, and FIGS. 2A to 2D are explanatory diagrams of the construction procedure of the present invention. 1...Cylinder body, 2...Bottom plate, 3...Short cylinder screw stopper, 4
...wire line, 5...weight for destroying the bottom plate, 6...
Hanging string, 7... Cutting table, 8... Metsenger, 9
... Hanging tool, 10... Soft lid, 11... Drill hole.

Claims (1)

[Scope of Claims] 1. A cylindrical body with a tapered tip, which is loaded with a different fluid such as a water loss prevention chemical and has a bottom plate made of an easily broken material, is suspended from the tip of a wire line and lowered to a predetermined position in the excavation hole. Then, a cutting table fixed in front of the wire line cylinder is suspended from which a winged weight for destroying the bottom plate, which cannot be removed from the opening at the tip of the cylinder, acts downwardly on the bottom plate, which is suspended in the upper part of the cylinder. A hanging cord that is passed over the top and fixed is cut by lowering and colliding with the cutting table a Metsusenjar attached to the wire line, and colliding the winged weight for destroying the bottom plate with the bottom plate, and then cutting the weight. A method for transporting a different type of fluid on the seabed or in a well, characterized in that the charged liquid is diffused and the cylinder is recovered while the liquid is retained in the cylinder. 2. At the tip of the wire line, a bottom plate made of easily breakable material such as glass, ceramics, reinforced cloth, etc. is removably fastened and crimped to the inner diameter step enlarged part shaped at the lower end tapered part, and A cylindrical body whose upper end opening is covered with a soft lid having a hole is suspended, a cutting table is fixedly installed in front of the cylindrical body, and the bottom plate is mounted freely below the soft lid at the upper part of the cylindrical body. A hanging cord passed through the hole that suspends the winged weight for destroying the bottom plate, which cannot be pulled out from the opening at the tip of the cylindrical body that acts in a descending manner, is collided with a descending member attached to the wire line on the cutting table. A device for transporting different types of fluids on the seabed or in wells, where the fluids are transported across the seabed or in wells. 3. The device for transporting different fluids on the seabed or in a well as claimed in claim 2, wherein the cylindrical body and the short cylindrical screw fastener are made of the same material.