JPS606436B2 - Rapid-curing dry filling mixture for borehole work and method for producing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the field of drilling, and more particularly to a rapid hardening fill mixture and method for making the same to eliminate various problems associated with drilling operations.

The present invention is applicable to geological surveys, civil engineering surveys, drilling and blasting for oil and gas production and to eliminate areas of geological problem, including effluent fluids, inflow water absorption or unstable hole spacing. It can be used for cliff operations.

Problems encountered during rope hole work include the following cases.

Maple holes that cross the coalstone zone have negative effects on drilling conditions, such as loss of cleaning fluid and strong water jets that prevent the normal circulation of cleaning fluid. In seaholes in unstable areas, there is a risk of landslides on the borehole wall, sudden stoppage of drilling odor, and other accidents. In principle, the rock components in these areas are destroyed and crushed. These problems can be avoided by penetrating the rock with a borehole, filling the water intake or outlet channels, or isolating the problem areas with casing pipes. Dry filling mixtures used in such cases include 40-5% by weight alumina cement and 50-6% by weight.
Filling mixtures prepared on the basis of gypsum-cement mixtures containing gypsum or alabaster in a weight percent of gypsum or alabaster are known. The known mixtures are supplied in dry form to the areas where the above-mentioned problems occur and are applied directly to the application site of the pseudopore wall to form the lining.

Once the mixture has been applied to the hole and the lining formed, the drill tool is withdrawn from the hole and a new portion of the quick hardening mixture is applied or the pseudohole is advanced.

When the tool is withdrawn, a piston effect occurs, i.e. a vacuum is formed under the tool, creating a pressure gradient between the liquid inside and outside the lining. decreases.

Unbalanced pressure promotes lining failure.

This is because the rapid hardening mixture forming the trining does not exhibit sufficient strength increase or adhesion to the rock forming the walls of the hole. The piston effect causes the lining and hole wall to completely separate and crack.

Similar results can occur due to oscillations and pulsations in the pressure in the medium caused by the rotation of the Dorlet tool and the series of rods during drilling using rapidly setting filler mixtures of known composition.

Rapidly curing filler mixtures of known compositions are unable to provide the strength increase necessary to eliminate the above problems within a few minutes. Furthermore, known fast-setting dry fill mixtures rapidly lose activity during storage due to the interaction of cement and gypsum with moisture contained in the surrounding air. Known fast-setting dry fill mixtures for eliminating the above-mentioned problems are also obtained by mechanically mixing powdered cement and stone or alabaster taken in specific proportions. however"
The above mixing method is suitable for cement and gypsum or alabaster.
cannot provide the necessary homogeneous distribution in the mixture, thus leading to structural defects in the artificial stone lining formed, leaching of the lining material and thus rapid loss of tightness (after 2 or 3 days). .

Moreover, the existing production techniques of known dry mixtures do not provide a means to improve the quality of the mixture, since it has been found that it is not possible to introduce small amounts of the necessary additives into the mixture and to disperse them homogeneously. .

The invention solves the problem of boreholes that guarantees a long shelf life even under unfavorable conditions through the required rate of strength increase, strong adhesion of the mixture to the rock forming the pore walls and the use of specific uniformly distributed additives. It is an object of the present invention to provide a rapid curing dry filling mixture for removing . It is therefore an object of the present invention to provide a rapid curing dry fill mixture with a sufficiently rapid rate of strength increase.

Another object of the invention is to provide a mixture which is characterized by sufficiently strong adhesion to the rock forming the collar of the hole. Another object of the invention is to provide a fast-setting dry fill mixture that retains its active properties even under adverse conditions and long-term storage.

Another object of the invention is a fast-setting dry filling that ensures the required homogeneous distribution throughout the cement and plaster or alabaster mixture in order to avoid structural defects in the lining artificial stone formed and leaching of the lining material. An object of the present invention is to provide a method for producing a mixture.

Another object of the invention is to provide a method for the production of mixtures which ensures an improvement in the quality of the mixture by introducing small amounts of additives and dispersing them homogeneously throughout the mixture.

This purpose consists of 40-5% by weight of cement and 50-5% by weight of cement.
In a fast-curing dry-filling mixture prepared on the basis of powdered gypsum-cemetobacter binder containing 6% by weight of gypsum or alabaster, barium hexaferrite (Serpentine) with dimensions commensurate with those of the particles of said binder is added. r fox mhexa
heron rrite) from 0.01 to 3. This is achieved in the above mixture characterized in that it contains % by weight of .

It is expedient to add 5 to 15% by weight of silica gel to the mixture.

The present invention also provides a method for producing a mixture, which consists in obtaining a gypsum-cement binder by mechanically mixing powdered cement and gypsum or alabaster taken in the required proportions. The above-mentioned method is characterized in that the barium hexate ferrate powder is mixed in the field while the barium hexate ferrate powder is introduced by abrasion of a workpiece which is a magnetized pellet made on the basis of barium hexate ferrate.

It is advisable to use pellets made exclusively from barium hexaferrite.

There is no disadvantage in using pellets made from barium hexaferrite and inert additives.

Preferably, a proportion of more abrasive pellets is present.

Rapid curing dry fill mixtures and methods of their manufacture to eliminate borehole problems have the required speed of strength increase, high adhesion to the rock forming the borehole walls, and long life spans even under adverse conditions.
Guaranteed shelf life.

The rapid curing dry fill mixture of the present invention is comprised of 40 to 5% by weight
of cement and a gypsum-cement binder containing 50-6% by weight of gypsum or alabaster. Additionally, the mixture contains barium hexaferrite powder particles of a size commensurate with the size of the binder particles.
01-3. Contains % by weight of

Mixtures containing less than 0.01% by weight of barium hexalight ferrate are unable to provide the required strength and adhesive properties.

Introducing more than 3% by weight of barium hexaferrite into the mixture delays the onset of hardening and reduces the strength of the lining.

The mixture can additionally contain 5 to 15% by weight of silica gel, introduced as a powder or pellet.

Addition of silica gel increases the shelf life of the mixture.

The rapid curing dry fill mixture according to the invention is produced as follows. Powder cement and plaster or alabaster taken in specific proportions are mixed in a chamber in an alternating electromagnetic field.

Addition of barium hexaferrite to the mixture is carried out through pellet abrasion during the milling process in the chamber.

Barium hexaferrite pellets can be prepared from barium hexaferrite alone or in mixtures with inert additives. It turns out that there is something.

The invention is illustrated by the following examples.

The properties of the rapid cure dry fill mixtures are shown in Tables 1-3.

Example 1 A mixture component of 50% cement and 50% alabaster taken in an amount of 2k9 was charged into a cylindrical chamber of 10 diameter walls containing 500 ta of barium hexaferrite magnetized pellets of 5 diameter sides.

The chamber is surrounded by an electromagnetic coil or solenoid,
The copper wire wound in cross section with a height of 8 ribs and a width of 45 sides has a diameter of 2 sails.

Once the electromagnetic coil was connected to a 220 V, 50 HZ (cpS) main source, the magnetized spheres moved in a chaotic manner, destroying the mixture in the chamber. After 1 town second of treatment, the following mixture was obtained: Alabaster 49.995% by weight Cement 49.995% by weight Barium hexaferrite 0.01% by weight Example 2 To increase the content of barium hexaferrite , a similar beret with greater abrasiveness (50°C below the recommended value of 1250
100 portions (produced at low temperature) were added to the remaining 497.8 portions of the pellet (Example 1).

All other process parameters remained unchanged.

1 After treatment, the following mixture was obtained: Alabaster 49.95% by weight Cement 49.95% by weight Barium hexaferrite 0.1% by weight Example 35
After processing 2 kg of a mixture consisting of cement and 5% by weight of alabaster, a mixture having the following composition was obtained: Cement 49.5% by weight Alabaster 49.5% by weight Barium hexaferrite 0 .1% by weight All other process parameters described in Example 1 were unchanged.

Example 4 After treatment of a mixture 2k9 consisting of 5% by weight of cement and 5% by weight of alabaster, a mixture with the following composition was obtained: Alabaster 485
Weight% Cement 48.5% by weight
Barium hexaferrite 3% by weight Thereafter, the curing time and uniaxial compressive strength of the above mixture were measured.

The curing time of the mixture was tested by the Pika-needle method and the uniaxial compressive strength test was performed on 7x7x7 skin cubes.

The test results are shown in the table below. Table 1 As is readily apparent from this table, the best physicochemical properties are 49.95% by weight of cement and 49.9% of alabaster.
Characteristics of a filling mixture containing 5% by weight and 0.1% by weight of barium hexaferrate.

Cement 49.995% by weight, alabaster 49.99%
5% by weight of barium hexaferrite and 0.01% by weight of barium hexaferrite (with very little difference in control sample properties), 48.5% by weight of cement, 48.5% by weight of alabaster and 0.01% by weight of barium hexaferrite. Barium ferrate 3.0% by weight
A filling mixture with a composition of is characterized by a substantially longer curing time and lower strength.

Therefore, another test was carried out on the filling mixture or cement with the best physicochemical properties: 49.95% by weight of alabaster, 49.95% by weight of alabaster and 0.1% by weight of barium hexaferrite.
% by weight. Table 2 shows the adhesive strength test results (tension) of cement stone to rocks.
Shown below.

In the table, C-cement, A- alabaster, H- barium hexaferrite. Table 2 Due to the high activity of the filling mixture according to the invention and because of the attendant problems during storage in geological parties, a certain amount of silica gel is added to the mixture in powder and pellet form or as a mixture thereof. be done.

Table 3 shows the change in properties when a filling mixture containing 49.95% by weight of cement, 49.95% by weight of alabaster and 0.1% by weight of barium hexaferrite is stored under cryogenic conditions.

Table 3 This table clearly shows that the mixture with 5% by weight of silica gel retains high physico-mechanical properties up to the first year of technical school, but deteriorates substantially on further storage.

On the other hand, the addition of 20% silica gel results in the loss of strength due to cement stone, and therefore the optimum content of silica gel is considered to be 15% by weight.

Claims (1)

Claims: 1. In a fast-setting dry filling mixture for drilling operations based on a powdered gypsum-cement binder containing 40-50% by weight of cement and 50-60% by weight of gypsum or alabaster, 0.01-3.0% by weight of barium hexaferrite powder particles that are dimensionally balanced with the binder particles.
A rapid curing dry fill mixture comprising: 2. A mixture according to paragraph 1, wherein the rapid curing dry fill mixture optionally contains 5 to 15% by weight silica gel. 3 0.01 to 0.01 to 0.01 to 0.01 to 0.01 to 0.01 to 0.01 to 0.01 to 0.01 to 0.01 to 0.01 to 0.01 to 0.01 to 0.01 to 0.01 to 0.01 to
Also in the method for producing a rapidly hardening dry fill mixture for drilling operations in which 3.0% by weight of barium hexaferrite powder is mixed, the base mixture is mixed in an alternating electromagnetic field, while the powdered hexaferrous acid A process as described above, characterized in that the barium admixture is introduced through the wear of the workpiece, which is a magnetized pellet based on barium hexaferrite. 4. The manufacturing method according to item 3 above, wherein the pellet member used is only barium hexaferrite. 5. The manufacturing method according to item 3 above, wherein the pellet member used comprises barium hexaferrite and an inert additive. 6. The manufacturing method according to item 3 or 4 above, wherein the pellet member used is easily abraded.