CN2846714Y

CN2846714Y - Large through caliber tail tube suspension device

Info

Publication number: CN2846714Y
Application number: CN 200520092790
Authority: CN
Inventors: 张微; 卜震山; 于家波; 陆洋阳
Original assignee: Liaohe Petroleum Exploration Bureau
Current assignee: Liaohe Petroleum Exploration Bureau
Priority date: 2005-09-26
Filing date: 2005-09-26
Publication date: 2006-12-13
Anticipated expiration: 2015-09-26

Abstract

The utility model relates to a large through caliber tail tube hanger which belongs to the class of drilling underground tools. A repair method of tail tube well cementation and reinforcement is frequently adopted for repairing long segment casing wear wells in the prior art. After a tail tube is hung, the size of a well hole is relatively small, and the enforcement of later stage production measures is badly restricted to cause the regular production of oil wells not to be obtained, and thus, the hanger of the utility model is composed of an upper joint, a cylinder body, a plunger piston, a central tube, a sliding sleeve, a sliding blade, a slip, etc. When the utility model is used, nothing remains but to link ground pipelines well, and a shearing nail between the sliding sleeve and a main body can be broken off through pressurizing so that the seat sealing of the slip can be obtained along the sliding sleeve; the unlocking can be obtained through the continuous pressurizing of a lock block, pipe strings rest on the lower part of a well are separated from the hanger which is lifted from a wellhead part and the hanger is lifted to complete hanging. The hanger of the utility model has the advantages that the through caliber is large, large-size tail tubes can be hung, and the use is convenient, and thus, the utility model can be repeatedly used for many times. In addition, the utility model adopts three-stage liquid cylinder structure to cause the seat sealing thereof to be more reliable.

Description

A kind of big latus rectum extension hanger

Technical field:

The utility model relates to a kind of big latus rectum extension hanger, belongs to drilling well downhole tool class.

Background technology:

Along with oil field development deepens continuously, the oil-water well in oil district particularly heavy oil wells high-solidifiability oil well sleeve pipe damage is on the rise, at present, often adopt the drilling liner cementing mode to reinforce reparation for long section casing failure well, implement to repair for the normal mode of beating sidetracked hole that adopts of the casing damaged well that can't repair, the tail tube hanging method that adopts during reparation can cause borehole size less than normal behind tail tube hanging, seriously restricts the enforcement of later stage production measure, and influences the ordinary production of oil well.

The utility model content:

The utility model purpose is in order to overcome above-mentioned shortcoming, and a kind of big latus rectum extension hanger that provides, this extension hanger has changed traditional drilling liner cementing pattern, and the latus rectum that has enlarged completion tubular column can be later stage oil-water well production provides bigger working space.

Implementation of the present utility model is such, and for achieving the above object, the utility model is made up of top connection, fluid cylinder, plunger, tail cylinder, pull bar, trustship, main body, slips, central tube, sliding sleeve, slide plate, lock dog, the head that expands, ball seat, plug; Described central tube links to each other with tube connector by screw thread, relief hole is arranged at the top of connecting piece, there are three keyholes that are 120 degree at the middle part, described expand a bottom and nut binding, and nut connects together by shear pin and tube connector, and main body is annular, is provided with three strip keyways that are 120 degree at the middle part of main body, described sliding sleeve top circumferential position is evenly distributed with eight slip grooves and eight goes into the slips sheet and places in the sliding sleeve of slips, and sliding sleeve and main body are fixed together with shear pin.

Described lock dog places in the keyhole, and lock dog inboard and bloated head and ball seat matches.

The utility model working method is such.

During this tool work, at first its top is linked to each other with drilling rod, the bottom is lowered into pipe in precalculated position in the well that is full of liquid with after large scale tail pipe to be hung links to each other, then toward the interior pitching of tubing string, make upper tube string and instrument inner chamber form a complete annular seal space, and then seated well head, good surface line connected, beginning is suppressed in pipeline, raise gradually in the tube chamber internal pressure, when reaching a certain force value, sliding sleeve and intersubjective shear pin are cut off, at this moment, slips rises along the conical surface of sliding sleeve, to setting fully, continues then to suppress, at this moment, shear pin between tube connector and the nut is cut off again, makes bloated head of ball seat and nut descending, and lock dog is unlocked.At this moment stay down-hole portion and repair pipe string proposition well head, the part instrument separately, go up bag then and draw together fluid cylinder, and the tail pipe that main body, slips and sliding sleeve and bottom link is left in the well, can finish whole tail tube hanging process after parts such as top fluid cylinder are suggested well head in interior entire tool.

The utility model compared with prior art has distinguishing feature.

Because the utility model latus rectum can hang 5  " tail pipe and 4  " tail pipe greatly, three grades of fluid cylinder structures forming by parts such as fluid cylinder, plungers in instrument, have been adopted in addition, it is big to make slips set pressure, dependable performance, and slips sets to separate with instrument and is locked in the reliability that can increase instrument under the different pressures, because this instrument after construction links, can propose the top hydraulic cylinder part well head, therefore, this instrument can be repeatedly used.

Description of drawings

Figure is a structural representation of the present utility model.

Among the figure by 1, top connection, 2, fluid cylinder, 3, plunger, 4, the tail cylinder, 5, pull bar, 6, trustship, 7, main body, 8, slips, 9, central tube, 10, tube connector, 11, sliding sleeve, 12, slide plate, 13, lock dog, 14, the head that expands, 15, ball seat, 16,22, nut, 17, plug, 18,19, " O " type circle, 20, pin, 21, packing, 22, nut, 23, shear pin forms.

The specific embodiment:

The utility model is provided by following examples, below in conjunction with accompanying drawing the utility model is described further.

The upper end that top connection 1 has a pin thread among the figure is connected with the drilling tool box, there is circular channel the centre, the lower end joins by screw thread and tail cylinder 4, three fluid cylinders 2 are housed respectively in the tail pipe from left to right, three plungers 3 are arranged in the cylinder body, cylinder body " O " type circle 18,19 sealings, three grades of hydraulic systems of common composition, pull bar 5 bottoms link to each other with central tube 9, and central tube 9 links to each other with tube connector 10 by screw thread, relief hole is arranged at tube connector 10 tops, the middle part has three to be 120 keyholes of spending, and lock dog 13 places in the keyhole, and inboard and bloated 14 of lock dog and ball seat 15 match, a bloated bottom links a nut, and nut 22 links together by shear pin 23 and tube connector 10.The plug 17 that connecting piece 10 bottoms link plays position-limiting action to ball seat and nut.The lock dog outside is embedded in the groove of slide plate 12, and the slide plate mouth is embedded in the main body 7, and main body 7 is annular, and three keyways that are 120 degree are arranged at the middle part of main body 7, and keyway is strip, and built-in slide plate mouth, slide plate mouth have certain sliding distance in main body 7.Slide plate 12 middle parts have six branches, two circles to be discharged to identical shaped little keyway, connect together at built-in key of little keyway and outside.Uniform eight slip grooves around slips sliding sleeve 11 tops, eight slips sheets place slips sliding sleeve internal slip 8, are divided into eight.Upper outside and slips adjacent in main body 7 have a conical surface, when slips sets, promptly rise to along this conical surface and set.Slips sliding sleeve 11 and main body 7 are fixed together by shear pin 22.

Claims

1, a kind of big latus rectum extension hanger is made up of top connection (1), fluid cylinder (2), plunger (3), tail cylinder (4), pull bar (5), trustship (6), main body (7), slips (8), central tube (9), sliding sleeve (11), slide plate (12), lock dog (13), expand head (14), ball seat (15), plug (17); It is characterized in that: described central tube (9) links to each other with a tube connector (10) by screw thread, on tube connector (10) top relief hole is arranged, there are three keyholes that are 120 degree at the middle part, a described bottom attaching nut (16) of expanding, nut links together by shear pin (23) and tube connector (10), there are three strip keyways that are 120 degree at the outer middle part that is the annular main body of described main body (7), described sliding sleeve (11) top circumferentially is evenly distributed with eight slip grooves and eight slips sheets all are placed in the slips sliding sleeve, and sliding sleeve (11) and main body (7) are fixed together with shear pin (22).

2, a kind of big latus rectum extension hanger according to claim 1, it is characterized in that: lock dog (13) places in the keyhole, and lock dog inboard and bloated head (14) and ball seat (15) matches.