RU1147U1 - Device for determining the plugging ability of a drilling fluid with a filler - Google Patents

Abstract

A device for determining the plugging ability of a drilling fluid with a filler, including a test chamber, consisting of a hollow cylindrical body with a bottom, a drain channel in the lower part of the body connected to a drain valve, a model rock sample installed above the drain channel, characterized in that it is provided with an additional chamber for preparation and storage of the test fluid, while the additional chamber is connected by a pipeline and valve to the test chamber, and inside the tester The new chamber is equipped with a load-piston with a seal.

Description

DEVICE yes REMAINED SHOWER SHOSHOSHI

,; . .-. V .-- DRILLING DRILL WITH RADIO

The utility model relates to the field of well drilling under the conditions of absorption of the drilling fluid and can be used for a comparative assessment and selection of the most effective fillers in browomus solutions for eliminating the losses.

A device is known for studying occupationally diverse types of fillers in drilling fluids / I /, which is implemented as a high pressure stand including chambers / with a large side opening. This hole is re-closed with an outer ring with calibrated holes, through which the test drilling fluid with a filler is forced through the differential pressure due to the pressure drop created by the compressed gas. The efficiency of the filler is assessed by the magnitude of the pressure drop by plugging the calibrated hole.

The disadvantage of this stand is that a calibrated hole is used as a model of permeable rock absorbing drilling fluid, which does not correspond to real BWM well conditions.

There is also a stand for research clogging materials (drilling fluids with fillers), including a tight

a chamber with a model specimen imitating rocks of expanded permeability. . -, capacity / 2 Д The specimen is installed in the lower part of the chamber NOT (with a hole that is provided with a valve from the outside of the chamber. Tests of the drilling rig @ @ with the filler are performed by forcing it through the model specimen until it is completely clogged due to the pressure in the chamber with using compressed gas. Image of jmf / fe / r

MESh 5 (R.,.,. Fe. I.. ZEC is filled in the form of several layers of balls, or a calibrated gap, Odaayo when drilling mud is tested on this stage with a LOW concentration of the filler or with a weak plugging ability of the filler the test volume the liquid in the chamber may not be sufficient for the result of the experiment (complete clogging of the sample. Therefore, the test chambers are performed with a large volume, which in turn requires the use of a modoich hydro (pneumatic) system to create the necessary pressure difference The proposed utility model allows us to simplify the design of the stand, p; to increase the safety of work by eliminating the need to use a pneumatic (hydro) system to create a differential pressure on a model sample, to achieve test results even in very low conditions the concentration of filler in the drilling fluid and to reduce the flow rate of the test solution due to the possibility of using the given solution in subsequent experiments. This goal is achieved by using a test chamber consisting of a hollow cylindrical body with a daisy, a drain channel in the lower part of the body connected to a drain valve, and a model rock sample installed above the drain channel. The proposed device differs from the prototype in that it is equipped with an additional a chamber for preparing and storing the test fluid, the additional chamber is connected by a pipeline and a valve to the test chamber, and inside the test chamber It becomes a cargo-piston seal ,. In FIG. I diagram of the device is shown in a cut. Ubstroystv you,. . . g -. . 5

Bd for |; in 1shk®y 3 a measuring tank is installed 4 In the box I 1 unit with a hole v2 a model sample 5 is placed. Inside the body I is placed a load-bearing element with a mass of 10 with a seal

The sprayed drilling fluid 8 with a filler is prepared and stored in an additional chamber 9, a stirrer 10 is used for continuous mixing of the solution. The fluid 8 is supplied to the test chamber I through the supply pipe y II with a valve 12. The supply pipe II is connected to the test chamber through channel 13 In the tank 4, the filtered solution 14 is collected.

- A drilling fluid test with a filler using this device is carried out as follows: In an additional chamber 9 using a mixer 10, a drilling fluid is prepared with the required concentration of filler with the shutter 12 closed. raising the load of the piston b to the upper position. After filling with the solution 8 of the exhaust chamber, close the valve 12 open the valve 3 and release the load then Shen b, by the action of the mass which, on sample 5, an established differential pressure is created. The solution 14 that has passed under the influence of pressure drop through the model sample 5 is collected in a measured number 4, After reducing the load of the piston b to the lower position, close the valve 3, open the valve 12 and the load-norsh 6 nedshshash in the upper position, again filling the test chamber with solution 8 of

. , -.-... V

cameras 9. The process of repeating the rat until the protection of the model sample 5, i.e. until the moment, the solution ceases to flow under the influence of the established pressure drop

into a measured vessel 4, On the day of maintaining during the test the post-test parameters i ypOBoro of solution 8 with a filler, they are continuously mixed in a chamber 9 with a stirrer 10,

-i -,

f After testing the drilling fluid with a low concentration of filler, the required additional amount is introduced into chamber 9 (taking into account the remaining volume of the mixture} fill 1 spruce with constant stirring with a stirrer 10 and repeat the tests at a higher concentration of filler. Thus, constantly increasing the concentration of filler, carry out the following experiments without prolonging the previous solution, which leads to a saving in solution compared to the prototype, where the solution remaining in the chamber is not suitable for further experiments, G using of the applied device, the plugging ability of drilling fluids with different concentrations of fillers was studied for conditions of different permeability of the model sample. The most effective pacTisopa, filler and its concentration were evaluated and selected according to the volume of the solution passed .. through the model sample until it was completely plugged at a given pressure drop equal to Sha, ... During research, a test chamber with a volume of 0.02 dm (internal diameter 20 mmT and additional Filling chamber with a volume of 10 dm (inner diameter 250 mm1 / As a model material, we used a 3 mm diameter and steel balls with a diameter of 5.5 mm; the height of the model sample was 50 mm; BELLY tested two clay filler carrier solutions on basis of clay powder NBG, the values of the rheological properties of koto | kh are given in table I, and peat and sawdust as fillers. Conditions of study - - tab. 2.. studies and their results are given in, l Table Z

Analysis of the driven results of the results shows that the proposed device can be effectively used to determine the plugging ability of drilling fluids with fillers and allows us to unambiguously characterize: ,, - efficiency., Various fillers in a particular drilling

solution (experiments I, 3); - -efficiency of different boric solutions as carriers of a specific filler (experiments I, 4);

-efficiency of co-concentration of the filler for different permeability of the model sample (experiments I, 2),

Authors: (/ Shsh Chubik Hi S.

(. Bralin V.I. - Godunov E.B. / Vice-rector for TCU Ushakov V.Ya.

. ; § ERROR OF USEFUL POWER. Device. For determining the plugging ability of a drilling fluid with a filler, including a test chamber, consisting of a hollow cylindrical body with a bottom, a drain channel in the lower part of the body connected to a drain valve, model

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a rock sample installed above the drainage channel, characterized in that it is equipped with an additional chamber for preparing and storing the test fluid, the additional chamber being connected by a pipeline and a valve with a test chamber, and a load piston with an accessory is installed in the test chamber . Authors: / Vice Rector for HP SHU

Sources of information G 2. AlyoEseev M.E., 1 (; roch1shn BM, Ssrshenko Study of clogging of the properties of various types of fillers in drilling fluids 7 / Express-information. Ser, Irrigation of oil and gas wells on land and at sea. - 1 .:, A, w 4, - 1982, vol. 12. - C, 30-33 (analogue) R.Rrei, G.S.G. 1arli, Composition and properties of drilling agents (flushing fluids) / sher from English - M .: Nedra, J985. - S. II5-II7 (prototype} .bik P.S. BrshEin Z.I. Godunov E.B. Ushakov V.Ya.

Claims (1)

A device for determining the plugging ability of a drilling fluid with a filler, including a test chamber, consisting of a hollow cylindrical body with a bottom, a drain channel in the lower part of the body connected to a drain valve, a model rock sample installed above the drain channel, characterized in that it is provided with an additional chamber for preparation and storage of the test fluid, while the additional chamber is connected by a pipeline and valve to the test chamber, and inside the tester The new chamber is equipped with a load-piston with a seal.