SU583278A1 - Insertable bladed expander bit - Google Patents

Description

one

The invention relates to the field of drilling wells, namely, devices for expanding wells used in turbine drilling of a well without lifting drill pipes to the surface.

Known sliding expander, retrieved through the pipe, containing, body, stem with, expanding the working bodies on the spring-loaded legs, pivotally mounted in the slots of the body (1.

The disadvantage of this sliding extension is in the unreliability of work due to the difficulty of converting the expansions; (working bodies from the transport to the working position.

The closest in technical essence and the achieved result is a plug-in blade expander, comprising a housing, a piston rod, spring-loaded blades, hingedly mounted in the carriages of the rod and placed in the slots of the housing 2.

Plug-in extender works as follows.

Spring-loaded blades of the sweeper during operation, moving in the longitudinal grooves of the body, interact with the casing shoe, which transfers axial load and rotational moment. The hinge joint in the lower part of the blade with the expander stem allows to increase its working and gage surfaces.

The disadvantage of this extender is

in that for translating blades and securing

they must be in working position

additional moving parts system

which reduces the reliability of the expander.

In addition, the interaction of the blades of the expander with the casing shoe during operation does not allow the use of the extender in conjunction with the turbo-drill.

The aim of the invention is to increase the high performance of the expander.

This is achieved by the fact that the end part of each blade is made with shoulders, and the casing with corresponding protrusions in the slots.

FIG. Figure 1 shows the plug-in blade expander in the transport position, longitudinal section; in fig. 2 is a section A-A of FIG. one; in fig. 3 - view B of FIG. one; on fng. 4 - plug-in blade expander in the working position.

The plug-in blade expander includes a housing with guide lugs 2. in the longitudinal grooves 3 with the supporting side surface 4, the supporting surface 5, the supporting sleeve 6, the rod 7 with the piston 8 and the carriages 9, in

..

which, on axis 10, are mounted a blade 11 with chuck-plated .12, e-punch 13. support strap And and spring 15, a sub 16 for connection to the shaft 17 of the turbo-drill 18, a transfer 19 for connection to the pilot bit 20.

The pipe string 21 has: a shoe 22 with a limb 23.

Insert the burst Oh, the expander is transported To the bottom of the svvzhzhyyy-on-the-surface inside the “cm of pipes 21 to with a young blade m Uv | p9tonie fnns ps ||} Tc in the position of the springs in the blade) IS springs placed in the blade; | 1 below: axis 1p V ;;

After the launch of the plug-in paddle pacmiiritel, connected through the sub 16 with the shaft 17 of the turbodrill 19 in the conical ledge of the shoe 22 columns. pipe 21, body 1 expander is cemented. - inside: Co.; (1uns of pipes 21 with noMOUMiidRc HKHIi "Gulmi 6; disintegrated between nepeitoAnWHoM: 16 1 reamer and" beaten with miiiriii thread, blade 11 1 | Lei ; some washing fluid; which acts on the piston 9. The impeller moves the blades and upwards; the shoulders 13 of the shanks 12, which are located in the horizontal parts of the blades II, slide along the guide lugs 2 in the longitudinal grooves 3 of the body I. Axial load transfer at the time of the well bore through the shaft 18 of the turbo-drill 19 n and the supporting surface 5 longitudinal grooves 3 n supporting benches 14 of the blades And, and the transmission of torque is carried out supporting the lateral surfaces of the 4 longitudinal grooves 3 of the housing I of the expander.

When translating the plug-in blade spreader into the transport position, the outer surfaces of the shanks 12 interact with the concave ledge 23 of the shoe 22 of the pipe string 21, as a result of which the blades are displaced relative to the housing 1 of the spreader, turning on the axis 10, occupy the transport position of the vp; ah 3 : COP RIUS 1 RSCNRNTEL .- -., ./. ..- v-. .

At the beginning of the drilling process: the rotation from the turbo-drill 18 is transmitted through the shaft 17, transfer 16, housing 1 extension n. Translator 19, connected by thread to the lower part of housing 1 extension, to pilot bit 20.

The proposed plug-in paddle expander is reliable in operation and allows it to be used in turbine drilling boreholes without aulem buridynts,.

, 9oftA Aa.tt30 Te№un

Plug-in lop9c1; u6y: a dilator, comprising a housing, a stem with a J-axis, spring-loaded blades, hinged in. rod carriages located in the slots of the housing, characterized in that, in order to increase the reliability of the expander, the end portion of each blade is made with shoulders, and the housing with corresponding guide lugs in the slots.

Information sources. Considered in the examination:

1. US Patent No. 2754088, cl. 175-290, 1956

2. US patent number 3661219. class. 175-260,1972.

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21 Pounds.