RU29327U1 - HYDRAULIC HYDRAULIC BIT DRILLING NOZZLE - Google Patents

Abstract

A nozzle for a cone hydraulic monitoring bit, including a housing with a hydraulic monitoring channel, the axis of the outlet being directed at an acute angle to the borehole wall, at which the length of the flooded mud stream from the nozzle outlet to contacting the borehole wall is 5-6 times the diameter of the outlet, that its body is made in the form of a cylinder, while at the outlet it is dissected by a plane perpendicular to the axis of the said outlet.

Description

SPRAY BITCH

The utility model relates to the field of drilling oil and gas wells, in particular, to devices used for hydro-jet impact on the bottomhole zone in the process of mechanical destruction of rocks.

A well-known drill (see A. S. No. 1810465, MKI 5 E 21 B 10/18, published in B. and. 15 1993), containing a hollow body with a side channel, roller cone, nozzle and flushing pipe. The nozzle is mounted on the side surface of the flushing pipe and is located at an angle to the vertical axis from the body and coaxially with the side channel of the latter.

During the operation of the chisel, the face is cleaned from sludge according to the traditional scheme.

Due to the presence of a nozzle in the flushing nozzle, an ejection effect is created, which contributes to an increase in the efficiency of cleaning the bottom of the well from sludge.

Also known cone bit (see A. S. No. 714072, MKI 5 E 21 B 10/18, publ. In B. I. J42 7, 1992), containing the body, connected to them paws mounted on them cones and with side nozzles. In this case, the axis of the side nozzles are directed at the intersection with the circle.

MKI 6 E 21 V 10/18

describing the calibrating surfaces of cones with a radius equal to the radius of the bit.

According to the invention, the hydrodynamic effect on the calibration line of the wellbore leads to erosion of the rock due to shear stresses arising from the action of the transverse flow generated when the jet meets the face. This contributes to the statement of the inventors to increase the performance of the bit as a whole (sinking, mechanical drilling speed).

Without begging the merits of each of the known bits, we note that, due to their design features of the nozzles, they have low efficiency in terms of blocking the channels of the permeable layer opened by drilling. In addition, the narrowing of the diameter of the wellbore due to the actuation of the outer (calibrating) crown of the bit cutters is not prevented. As a result, various complications are frequent, expansion of the narrowed section of the trunk when lowering a new bit, grabbing the bit, and breaking the tool.

Known nozzle for roller cone hydraulic bit (see Patent R. F. No. 2168600 M. CL E 21 B 10/18, publ. In B. I. No. 16, 2001, under the name "Rolling cone bit), containing the housing made in the form of a curved adapter with a hydraulic monitor channel, the axis of the outlet of which is directed at an acute angle to the wall of the well, the length of the flooded stream from the outlet

nozzles to the wall of the well selected from the equality L (5 - 6) d n; where L is the length of the flooded stream, mm, d n is the diameter of the outlet, mm.

The known technical solution in its technical essence is closer to the proposed one and can be taken as a prototype.

Its disadvantage is that it finds limited use due to its design features, for example, its installation in foreign bits causes a number of difficulties, requires structural changes in the bits. In addition, its manufacture is not technologically advanced, complex in design.

The objective of this utility model is to remedy these shortcomings.

The problem is solved by the described nozzle, which includes a housing with a hydraulic monitor channel, the axis of the outlet being directed at an acute angle to the well wall, at which the length of the flooded stream from the nozzle outlet to contact with the well wall is 5-6 of the outlet diameter, mm.

What is new is that its body is made in the form of a cylinder, while at the outlet it is cut in a plane perpendicular to the axis of the aforementioned outlet.

Patent research on novelty was carried out in the patent fund of the TatPIPIneft Institute, with a retrospectiveness of 20 years. Objects characterized by such a combination of essential features as

proposed not found. Therefore, but the opinion of the authors, the claimed technical solution has novelty.

The above figures explain the essence of the proposal, where in FIG. 1

depicts a three-cone hydraulic monitor bit with side

nozzles, one of which is in the context of the proposed design, general view.

In FIG. 2 is a view of A of FIG. 1, sectional nozzle (enlarged).

Nozzle for roller cone bit includes a housing

1 (see Fig. 2), made in the form of a cylinder with an annular groove 2 for

locking element and a hydraulic monitor channel 3, axis 4 of the output

holes 5 of the inclined channel 6 is directed at an acute angle "(X to

wall 7 of the well (see Fig. 1), in which the length of the flooded stream from

nozzle outlet 5 until it contacts the wall 7 of the well

equal to 5-6 of the diameter of the outlet 5. At this length, flooded

the jet is characterized by a constant core diameter and has the largest

hydraulic power. At the outlet, housing 1 is dissected

plane 8 at right angles, i.e. perpendicular to axis 4 of said

outlet

The nozzle of the proposed design works as follows;

In the process of rotation of the cone hydromonitor bit under

axial load of the teeth 9 cones 10 destroy the rock. Wherein

part of the drilling fluid pumped under high pressure

side nozzle 1 with an inclined side channel 6 into the annulus at an angle «(X down to the wall of the wellbore at a speed of 70 - 100 m / s (see Fig. 1). A stream of fluid flowing out of this nozzle under high pressure, flooded into the upward flow of the drilling fluid creates a pulsating wave field near the borehole wall, sending solid particles of the drilling fluid to the pores and cracks of the permeable formation, which results in the mudding of the permeable formation in the near-wellbore zone. immediately as the formation is opened by drilling, at which another effect is simultaneously achieved - the formation of a clay crust leading to a narrowing of the wellbore is eliminated. In both cases, it is also positive that the jets emanating from such nozzles at the bottom create a vortex-like flow of flushing liquid, improving the quality of flushing of the bottom Hence the performance bit of work.

It is similarly done when it is necessary to create an ejection effect by directing the outlet of one of the nozzles upward at an angle to the borehole wall, which eliminates gland formation, pistoning when lifting the tool, and improves bottom hole cleaning from cuttings.

5 /// 1/2

The technical and economic advantage of the proposal is as follows.

When using the proposed bit, a number of complications when drilling a well are eliminated (flushing fluid leaving the formation, sticking, tightening of the drilling tool, etc.), the performance of the bit - penetration, mechanical drilling speed is improved.

Its widespread use in the fields will provide tangible economic benefits. Senior Researcher, Patent Service, LSE ZNOK and PPD Tatneft

/ v / i / g J Shayakhmetov Sh. K.

Claims (1)

A nozzle for a cone hydraulic monitoring bit, including a housing with a hydraulic monitoring channel, the axis of the outlet being directed at an acute angle to the borehole wall, at which the length of the flooded mud stream from the nozzle outlet to contacting the borehole wall is 5-6 times the diameter of the outlet, that its body is made in the form of a cylinder, while at the outlet it is dissected by a plane perpendicular to the axis of the said outlet.