CN2159452Y

CN2159452Y - Automatically-aligning hanging apparatus for cartridge container

Info

Publication number: CN2159452Y
Application number: CN 93228591
Authority: CN
Inventors: 刘铭; 蔡俊林; 赵镝斗; 王桂芬
Original assignee: XINGUANG PETROLEUM DRILLING EQUIPMENT TECHNOLOGY INST SHENYANG CITY
Priority date: 1993-06-25
Filing date: 1993-06-25
Publication date: 1994-03-23
Anticipated expiration: 2003-06-25

Abstract

The utility model relates to a device for hanging a tail tube automatically in a well during the petroleum and the natural gas drilling. The tail tube can be automatically hung anywhere through combination of the ball hung assembly, self locking assembly and compound rubber plug. The device can perform the reliable hanging anywhere and automatic disjunction at the setting position without the inversion of a drill string. In addition, cement paste can be replaced by the compound rubber plug. Drilling cement plug is no longer needed, so the well completion cycle is shortened.

Description

Automatically-aligning hanging apparatus for cartridge container

A kind ofly hang the device of tail pipe automatically, in well, hang the device of tail pipe when it is oil, natural gas drilling automatically with the position.

The tail tube hanging device that generally uses both at home and abroad has two kinds at present, and the one, hydraulic pressure extension hanger, the 2nd, tail step hanger.Hydraulic pressure extension hanger complex structure, cost an arm and a leg, hang, need drill string counter-rotating back-off after hanging, to reach the purpose of drill string and hanger disconnection though can realize the optional position.Field practice shows, the point that disconnects toward up moving, makes DRILL-STRING SYSTEM itself disconnect not on the precalculated position, causes once more or brill down repeatedly.Tail step hanger can not realize that not only the optional position hangs, and strict to the down-hole string radial dimension, is difficult to apply.Above-mentioned two kinds of hangers all need to bore down again drilling out, have prolonged completion period.

The purpose of this utility model provides a kind of optional position of realizing and reliably hangs, do not need tail tube hanging device drill string counter-rotating back-off and that can disconnect automatically at desired location.

The purpose of this utility model is achieved in that by the suspension of the ball in this device assembly, from lock assembly and Compounded rubber plug structure, just can reaches the purpose with the automatic suspension in position of tail pipe.

The tail tube hanging device that the utility model provides can be realized the reliable suspension on the optional position, does not need drill string counter-rotating back-off, and can realize the automatic disconnection of desired location.In addition, Compounded rubber plug can replace out cement paste, without drilling out, has shortened completion period.

In conjunction with the accompanying drawings, again the structure of this device is described in detail as follows:

Fig. 1 is the structural representation of this device.

As can be seen from Figure 1, this device comprises plug 1, connector 2, plug 3, interior cover 4, small ball 5, pin 6 and 11, piston 7, slips 8, steel ball 9, steel bushing 10, combined seal ring 12, tail pipe 13, in the cavity volume on the interior circle of connector 2, be equipped with plug 1 with elasticity groove, and on 2 inwalls of the connector below the plug 1, plug 3 is installed, be equipped with steel bushing 10 in the connector 2 lower end cavity volumes, produce annular boss on steel bushing 10 inner headed faces, cover is loaded onto combined seal ring 12 on the periphery of steel bushing 10, and steel bushing 10 is connected with connector 2 usefulness pins 11; Be equipped with in the lower end of connector 2 on the cylindrical wall of steel bushing 10 and producing small sircle hole, the inner headed face of slips 8 that has teeth is except with the periphery of connector 2 is equipped mutually, also should be fitted in the aperture on connector 2 cylindrical walls with the steel ball 9 of spring compression in the slips 8 inwall blind holes, constitute ball and hang assembly; Interior cover 4 is equipped mutually with connector 2 upper end peripheries, and with have the oblique cone cannelure on the inner round wall and the piston 7 of small ball 5 be housed in cannelure, equipped mutually by pin 6, formation is from lock assembly, in lock assembly was inserted the conical gap that is embedded in slips 8 and connector 2 formation, tail pipe 13 usefulness were threaded on the end of slips 8 in the ball suspension assembly.

The course of work of this device and tail pipe 13 with position suspension process automatically be: suspension arrangement is lowered in oil, the gas well with the drilling rod system together with tail pipe 13, and at this moment tail pipe 13 hangs assembly by ball fully from heavy load and bears.When being lowered to the down-hole and arriving projected depth, dispensing plug 1 and make under the effect of power fluid its descending and cut off plug 3 after be located on the steel bushing 10, the duct is shut.At this moment, the elasticity groove on the plug 1 is equipped mutually with the annular boss on the steel bushing 10.After plug 3 was cut off, the mud power fluid acted on the upper surface of piston 7, makes the piston 7 descending pins 6 of cutting off, and the slips teeth is embedded on the inner surface that is installed to the protective casing in the well in advance.At this moment the tail pipe 13 that links together with slips 8 ends just has been suspended on the protective casing.When the upper surface of piston 7 hydraulic action was eliminated, because the self-locking action of small ball 5 on interior cover 4 external surfaces, slips 8 drew in never.At this moment, the elasticity groove has been located in the plug 1 on the annular boss on the steel bushing 10, and the steel bushing 10 of combined seal ring 12 with suit on the periphery is equipped mutually, constitutes Compounded rubber plug.When the mud dynamicliquid pressure increased pressure and reaches certain numerical value on former basis, it is descending and replace out cement paste in the tail pipe 13 that Compounded rubber plug is cut off pin 11 beginnings, finally falls the shaft bottom.Simultaneously, behind the descending segment distance of Compounded rubber plug, ball hangs the steel ball 9 in the assembly, automatically ejected owing to lose the support of steel bushing 10, the relevant parts with all of outer round surface of the connector 2 of this moment lose connection, after Compounded rubber plug comes downwards to the shaft bottom, on carry drill string and be retracted together with connector 2, so just finished the suspension operation of tail pipe 13.

Claims

1, a kind ofly hangs the tail pipe device automatically with the position, it comprises plug, connector, plug, interior cover, steel ball, pin, piston, slips, steel bushing, combined seal ring and tail pipe, it is characterized in that in connector, being equipped with plug in the cavity volume on the circle with elasticity groove, and on the connector inwall below the plug, plug is installed, be equipped with steel bushing in the cavity volume of connector lower end, produce annular boss on the circle in the steel bushing, the cylindrical cover of steel bushing is loaded onto combined seal ring, and steel bushing is connected with pin with connector; Be equipped with in the lower end of connector on the cylindrical wall of steel bushing and producing small sircle hole, the inner headed face of slips that has teeth is except with the periphery of connector is equipped mutually, also should be fitted in the aperture on the connector cylindrical wall with the steel ball of spring compression in the slips inwall blind hole, constitute ball and hang assembly; Interior cover is equipped mutually with connector upper end periphery, and with have the oblique cone cannelure on the inner round wall and the piston of small ball be housed in cannelure, equipped mutually by pin, constitute from lock assembly, in lock assembly is inserted the conical gap that is embedded in slips and connector formation; Producing cover on annular boss, the cylindrical on plug with elasticity groove and the interior circle, to load onto the steel bushing of combined seal ring equipped mutually, constitutes Compounded rubber plug; Tail pipe is with on the end that is threaded in slips in the ball suspension assembly.