SU1343000A1 - Method of drilling wells - Google Patents

Abstract

The invention relates to the mining industry. The purpose of the invention is to simplify launching and prevent the cutting out of cuttings. Pre-lower the water-lifting column, inside of which the jet pump is installed. and using it to create a backwash well. The flushing fluid carrying the drill cuttings to the surface above the pump along the column is carried out. The back pressure of the fluid between the well and the column is then created by injecting the working agent in the form of a fluid into the annular space. At the same time, the agent flow between the pump and the column is throttled. Compressed air is used as a working agent to ensure drilling over absorbing formations. The pressure required to overcome the hydraulic resistances of the drill string from the bottom to the pump is ensured by immersing it below the static fluid level in the well. 2 hp f-ly, 2 ill. S (L SA:

Description

i 4O6p l-l-} l- t- о 1) I1IJ, I-; P,) With gi,:

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The chain ii riOpe Mr. uch etg- the simplification of the tripping and predistraction of 11 w o: food at the feet of the sludge.

From 4; 1 formerly Tnt. Rienn scheme for implementing irmethan gmemo) -, spxcheb,

in QW-H (- C TP g-) gS Ch1 g-SH POL -

ys) i; n; u-: ci i V I l phg,: - then AC, as: i) the working agent is used compressed 11 gas.

The device from which implements the method includes the “mb drill pump 1, ootipiiibi;: iurr.tl og —salnik 2, single-oh :). j. torny 7 rub j, CTpyii 1;, TH Hivoi .: -. , at: I iiuMi ieHifhiK Inu gri otsopo ;; 1.emn1l g .-- ltloyik 5. Last r .; .. (M utrii casing 6 pipes with rock breaking Dim on the back of the 7. PHIUIN with a well placed standoff 8, Additional pump 9 us, cho / ij fi detach l com 8 and i MKoci7-: ii I). On the case of struynogs; iacoca h, the drosse liruk1 |; n-; 11 knot — nida burt 1 1, Fields of mass M: 1st co.con d with z — MK;:; ь} (1 iO nozzle 12. In the case of i cr; ojni3ontin and v. kak - e-с 1 Ы (rac eteg: endg with Ms G ;,; .yxa on the ycTananjH-inp.io- to 1 compressor 13 , H case 11solz;: 1, ani squeezed about the air (Fig. 2 II ;: 11 l: l, l; IO,: ,, I; xslonna b usag gapoil:; m. (L1te :: ts, settled Hbrti at a depth of 1: .s,; nh with a chchuyuyu backwater pap, g 1; 11. lilly pump i.

Cnocf; 6 lea.iM v RL s-ls in an arc way.

ieiji: v; The backwash operation is performed by pre-draining with bUbii t descend. ) T1H1: 5. Next, the work; 1st stream nooMriroo4no; i the fluid is supplied by the mud pump 1 from the sump 8 through the swivel 2 and the boring 3, where the fluid enters the pump 4; t. About the industrial tray, the working tray, converting n reverse, enters the nozzle of the standpipe. The exit from the nozzle at a high speed, the working flow from the jet pump receiving chamber of the jet pump: flow, ascending along the last column from the bottom of the well, combining with the injected mass, enters cm1: a single chamber ;; pump 4, then ii diff02

FuzS p, which passes through the output through Box Vk. windows in the pump casing in the ring of the nrss t 11odod1 podnoyemnoy ajM - HHb 3 and further,; j, jets

Hcu o pump fluid flow moves to the wellhead, de through the nozzle 2 is poured into the sump 8.

The backpressure of the fluid between the c-well and the lifting column 5 sozn.ashg n case by way of the pump -; P1 I L FACTORIES FROM VGOSTI 10, rNS ..; - ,, i-.fj, the mountain is continuously replenished with l,.) with a full-pump 9, and simultaneously. With this throttling of the flow, liquid J; O (: TH through the throttling unit of 1 m) is the o-neck gap between the collar i and the wall of the lifting column ;; pressure jet line of the jet, - li L, suction, t, e. 4To6tii condition

-I h

H

s

P

- depth of immersion of the water-jet pump relative to the level of the spout flushing and liquid, m;

-small wash weight

liquids in the annular space of the lifting column, t / m;

-the amount of hydraulic forces in the water-lifting hopper, m;

- depth of the jet pump from the level of the liquid in the tank, m;

-specific weight of drilling fluid in the well, t / m.

   blts Ch-n. the above ratio causes the liquid to flow from the pressure pump of the jet pump to the suction line

45, as a result of which part of the sludge raised from the bottom of the drill pipe will again fall to the bottom. It follows from the above description of this ratio that, h (: m is at a greater depth

50 A ruin pump relative to the spout of the flushing fluid at the wellhead. The level of the fluid in the tank must be raised to a great height. In turn, the depth of the submersible jet pump in a water-lifting column is determined by the value of c-T-fMbi, 1 the hydraulic resistance of the storm.) Of the pipes below the jet pump.

i

When using compressed gas as a working agent, the flow of liquid exits through the windows in the pump casing into the annular space of the water lifting column 5 and further under the pressure of the jet pump, the liquid flow rises to the mixer 14, where it is aerated with compressed air coming from the compressor 13 through the annular space between the casing 6 and a water-lifting 5 columns and then an aerated stream, being fed to the wellhead, is poured into the sump 8. From the sump, industrial fluid is supplied by the same or additionally installed us The wasp into the well, along which it descends to the bottom, where it washes the rock-breaking tip 7, covers the drilled rock and rises along the drill string to the jet pump 4.

The required depth of displacement of the air-water section is equal to the depth of the mixer under the static (dynamic) water level in the well, determined by the condition that the total weight of aerated non-aerated columns of flushing fluid in the annular space of the lifting column is less than the fluid weight in the annular space of the well, t. e. to comply with the condition

N.

7, - H, Xz + Ih H, -} ,,,

de n,

,

T2 N,

Gb

height of non-aerated liquid column in a water-lifting column, m; the specific gravity of the non-aerated liquid in the lifting column, the specific gravity of the aerated liquid, t / m;

height of aerated column g of liquid, m;

the amount of hydraulic losses in the lifting column, m:

35

40

H.J - the height of the liquid column and the annular space between the lifting and casing, m; - specific gravity of fluid in

annular space between the lifting and casing, T / M-. The pressure required to overcome the hydraulic resistances of the drill string from the bottom to the jet pump is provided by the depth of the jet pump under the static dynamic fluid level in the well.

Claims (3)

1. A method of drilling wells by creating a backwash using a jet pump installed inside the water-raising column, and the release of flushing fluid that carries the drilled rock to the surface above the pump along the water-lifting column, characterized in that, in order to simplify the lifting and lifting operations prevent settling of drilled sludge, before creating a backwash, carry out a preliminary descent of the water-lifting column, and then create a back pressure of the fluid between the well and the water-lifting column pumping the working agent in the laws Pubic space and simultaneously throttling the flow of working Agen that between the pump and the water-lifting column. 2. Method POP.1, differing from that with the fact that they use sensitivity as a working agent. 3. Method POP1, characterized in that, in order to provide drilling in absorbing formations, compressed air is used as a working agent. X / J ,five Ka / /. and eleven X ./ at SP C ± 3 FIG. one FIG. 2