CN2893136Y

CN2893136Y - Double-central pipe drillable packer

Info

Publication number: CN2893136Y
Application number: CN 200520117813
Authority: CN
Inventors: 王俊; 田相明; 张立义; 侯万勇
Original assignee: XINJIANG PETROLEUM ADMINISTRATION OIL-PRODUCTION TECHNOLOGY INST
Current assignee: XINJIANG PETROLEUM ADMINISTRATION OIL-PRODUCTION TECHNOLOGY INST
Priority date: 2005-09-02
Filing date: 2005-09-02
Publication date: 2007-04-25
Anticipated expiration: 2015-09-02

Abstract

A drillable double central tube excluder comprises a central tube, an upper pressing sleeve, an upper slip, an upper cone, a male bulge loop, a female bulge loop, a rubber tube socket, a rubber tube, a lower cone, a lower slip and a lower joint. The middle part of the central tube is sleeved with a rubber tube, while the central tube at the top of the rubber tube is sleeved with the upper pressing sleeve, the upper slip, the upper cone, the male bulge loop, the female bulge loop, the rubber tube socket from up to down. The upper pressing sleeve is positioned on the central tube through a safety shear pin, while a locking ring is arranged between the middle lower part of the upper pressing sleeve and the central tube and the upper cone is positioned on the central tube through a taped shear pin; the central tube at the bottom of the rubber tube is sleeved with the rubber tube socket, the upper cone, the male bulge loop, the lower cone, the lower slip and the lower joint from up to down. The utility model is reasonable and compact in structure and convenient for using. The drillable double central tube excluder is applied so as to shorten the operating period, reduce the operating cost and improve the construction efficiency, also applicable to the bushing with an equal diameter as well as the bushing with a combinatory diameter.

Description

Two central tube drillable packers

One, technical field:

The utility model relates to downhole tool---the packer that is used for oil, gas, well packing oil sets annular space, is a kind of pair of central tube drillable packer.

Two, background technology:

Drillable packer is a kind of seal reliable, very long downhole tool of working time, and the releasing of packer all is to take to bore the mill mode to carry out.For large diameter drillable packer, because its external diameter is very big, under the situation that satisfies the latus rectum needs, its body will be very thick, increased workload so just for brill mill in the future, makes and bore the mill cycle stretch-out.

Three, summary of the invention:

The utility model provides a kind of pair of central tube drillable packer, has overcome the deficiency of prior art, and it is easy to use, duty cycle is short and reduced operating cost, improved efficiency of construction.

The technical solution of the utility model realizes by following measure: a kind of pair of central tube drillable packer, it comprises central tube, last gland, upper slips, upper cone, male expansion ring, female expansion ring, glue tube base, packing element, lower cone, lower slips and lower contact, the middle part of central tube is set with packing element, be set with gland on the central tube on packing element top from the top down, upper slips, upper cone, male expansion ring, female expansion ring and glue tube base, last gland is positioned on the central tube by the safety shear pin, between the middle and lower part of last gland and central tube lock ring is installed, upper cone is positioned on the central tube by the cone shear pin; Be set with glue tube base, female expansion ring, male expansion ring, lower cone, lower slips and lower contact on the central tube of packing element bottom from the top down, lower cone is positioned on the central tube by the cone shear pin, and lower contact is fixedly mounted on the central tube by hold-down screw.

Be further optimization and/or improvements below to above-mentioned technical solutions of the utility model:

In above-mentioned central tube inner central tube can be installed, the boss of inner central tube bottom hangs on the hanging platform of inboard, lower contact bottom.

Between above-mentioned inner central tube bottom and lower contact, anti-switch block can be installed.

Between above-mentioned inner central tube and central tube, O-ring seals can be installed.

At above-mentioned upper cone or/and between lower cone and the central tube key can be installed.

The cross section, engagement place of above-mentioned male expansion ring and female expansion ring can be designed to semicircle.

The end face of above-mentioned glue tube base can be fully closed.

Above-mentioned outside of going up gland and lower contact can have along circumference and is no less than one half slot.

In the upper end of above-mentioned central tube and the lower end of lower contact tongue and groove can be arranged.

The utility model is rational in infrastructure and compact, and is easy to use, utilizes this pair central tube drillable packer, makes duty cycle short, and reduced operating cost, improved efficiency of construction, both applicable to the equal diameter sleeve pipe, also applicable to the combined diameter sleeve pipe.

Four, description of drawings:

Accompanying drawing 1 is for the master of the utility model most preferred embodiment looks the half section structural representation,

Accompanying drawing 2 is a user mode structural representation of the present utility model;

Coding in the accompanying drawing is respectively: 1 is central tube, and 2 is safe shear pin, and 3 is last gland, 4 is lock ring, and 5 is upper slips, and 6 is upper cone, 7 is inner central tube, 8,15 all is the cone shear pin, 9,16 all is key, 10 is male expansion ring, and 11 is female expansion ring, and 12 is glue tube base, 13 is packing element, and 14 is lower cone, and 17 is lower slips, 18 is O-ring seals, and 19 is hold-down screw, and 20 are anti-switch block, 21 are lower contact, and 22 is the major diameter sleeve pipe, and 23 are the top seal intubate, 24 is two central tube drillable packers, 25 for connecting oil pipe, and 26 is sleeve pipe reducing place, and 27 is the lower seal intubate, 28 is single central tube drillable packer, and 29 is bottom minor diameter sleeve pipe.

Five, the specific embodiment:

The utility model is not subjected to the restriction of following embodiment, can determine according to the technical solution of the utility model and actual conditions

Concrete embodiment.

Below in conjunction with embodiment and accompanying drawing the utility model is further described:

As shown in Figure 1, this pair central tube drillable packer comprises central tube 1, last gland 3, upper slips 5, upper cone 6, male expansion ring 10, female expansion ring 11, glue tube base 12, packing element 13, lower cone 14, lower slips 17 and lower contact 21, the middle part of central tube 1 is set with packing element 13, be set with gland 3 on the central tube 1 on packing element 13 tops from the top down, upper slips 5, upper cone 6, male expansion ring 10, female expansion ring 11 and glue tube base 12, last gland 3 is positioned on the central tube 1 by safety shear pin 2, between the middle and lower part of last gland 3 and central tube 1 lock ring 4 is installed, upper cone 6 is positioned on the central tube 1 by cone shear pin 8; On the central tube 1 of packing element 13 bottoms, be set with glue tube base, female expansion ring, male expansion ring, lower cone 14, lower slips 17 and lower contact 21 from the top down, lower cone 14 is positioned on the central tube 1 by cone shear pin 15, and lower contact 21 is fixedly mounted on the central tube 1 by hold-down screw 19.As shown in Figure 2, above-mentioned the utility model is applicable to the equal diameter sleeve pipe.

As shown in Figure 1, inner central tube 7 is installed in central tube 1, the boss of inner central tube 7 bottoms hangs on the hanging platform of inboard, lower contact 21 bottom, even if so just the utility model can be applicable to the diameter sleeve pipe, as shown in Figure 2.

In order further to improve performance of the present utility model, as shown in Figure 1, anti-switch block 20 is installed between inner central tube 7 bottoms and lower contact 21, make between central tube 1 and the inner central tube 7 and locked by relative, in boring the mill process, can not produce relative rotation between central tube 1 and the inner central tube 7 like this, thereby help boring mill; Between inner central tube 7 and central tube 1, O-ring seals 18 is installed, thereby helps realizing the sealing between central tube 1 and the inner central tube 7; Upper cone 6 (that is: is equipped with key between upper cone or lower cone and the central tube or/and

key

9,16 is installed between lower cone 14 and the central tube 1, perhaps, between upper cone and lower cone and the central tube key is installed), limit it and on circumference, produce relative rotation, help boring the raising of milling efficient; The engagement place Cross section Design of male expansion ring 10 and female expansion ring 11 is semicircle, has avoided bigger frictional force between former male and female tensioner ring, makes its easier distending; The end face of glue tube base 12 is fully closed, not only more helps protecting packing element 13, also makes the easier transmission of axial force to make the female expansion ring 11 of male expansion ring 10 open more reliable; The outside of last gland 3 and lower contact 21 has along circumference and is no less than one half slot, to reduce the workload of milling; In the upper end of central tube 1 and the lower end of lower contact 21 tongue and groove is arranged, need to bore simultaneously when mill again when in same well, being lowered to two cover the utility model, when its remnants fall into the bottom on boring mill, transfer torque effectively after the engagement of the tongue and groove of upper and lower side, prevent idle running, can improve the mill speed of boring greatly.

The foregoing description has stronger compliance and best implementation result, but can increase and decrease non-essential technical characterictic according to actual needs, satisfies the demand of different situations.

Operating principle of the present utility model: as shown in Figure 2, the utility model and setting tool and sealing intubate etc. is used.The utility model top is connected with shear pin with setting tool, the utility model that will connect with oil pipe is down to the design attitude of the major diameter sleeve pipe 22 on top, in oil pipe, drop into one piece of adapted steel ball and block the setting tool outlet, pump truck builds the pressure, by setting tool hydraulic pressure is transformed into axial load, connecting setting tool and shear pin of the present utility model is cut, adjusting gland on the setting tool promotes the last gland 3 of accompanying drawing 1 downwards, when pressure reaches certain value, last gland 3 is cut off, last gland 3 drives lock ring 4 descending compression packing elements 13, packing element 13 two ends are prolonged 45 ° to the male expansion ring 10 of dress and female expansion ring 11 and are swollen and be affixed to sleeve pipe, pressure continues to increase, upper cone 6 and lower cone 14 move toward one another burst upper slips 5 and lower slips 17 is affixed to sleeve pipe, cut off when pressure reaches the shear strength of setting tool shear pin, oil jacket is communicated with pressure and descends, and the utility model is finished and set.

Another kind of application form of the present utility model, as shown in Figure 2, at first the single central tube that is lowered in the small casing of bottom can bore packer and set and give up.The single central tube that is lowered to inner central tube internal diameter and bottom again can bore the consistent the utility model of packer internal diameter and set gives up, be lowered to the pipe string of giving up of being with the upper-lower seal intubate again and once insert drillable central tube interior and give up (also can not giving up) up and down, because the internal diameter of the two central tube drillable packer inner central tubes in top and the single central tube in bottom are identical in the time of can boring the internal diameter of packer, the sealing intubate is inserted behind two central tubes at drillable packer place up and down and is not had area difference, so be exactly to seal intubate to take the mode of giving up, and inside and outside accompanying drawing 2 connects oil pipes, exist under the situation of very big pressure reduction, the sealing intubate of insertion be connected oil pipe and also can not produce situation about moving up.And when putting on portion's tubing string (as inspection pump etc.), do not need moving sealing intubate of having given up.

Claims

1, a kind of pair of central tube drillable packer, it is characterized in that comprising central tube, go up gland, upper slips, upper cone, male expansion ring, female expansion ring, glue tube base, packing element, lower cone, lower slips and lower contact, the middle part of central tube is set with packing element, be set with gland, upper slips, upper cone, male expansion ring, female expansion ring and glue tube base on the central tube on packing element top from the top down, last gland is positioned on the central tube by the safety shear pin, between the middle and lower part of last gland and central tube lock ring is installed, upper cone is positioned on the central tube by the cone shear pin; Be set with glue tube base, female expansion ring, male expansion ring, lower cone, lower slips and lower contact on the central tube of packing element bottom from the top down, lower cone is positioned on the central tube by the cone shear pin, and lower contact is fixedly mounted on the central tube by hold-down screw.

2, according to claim 1 pair of central tube drillable packer is characterized in that being equipped with in the central tube inner central tube, and the boss of inner central tube bottom hangs on the hanging platform of inboard, lower contact bottom.

3, according to claim 2 pair of central tube drillable packer is characterized in that between inner central tube bottom and the lower contact anti-switch block being installed.

4, according to claim 2 or 3 described pairs of central tube drillable packers, it is characterized in that between inner central tube and the central tube O-ring seals being installed.

5, according to claim 1 or 2 or 3 described pairs of central tube drillable packers, it is characterized in that upper cone or/and between lower cone and the central tube key is installed.

6, according to claim 4 pair of central tube drillable packer is characterized in that upper cone or/and between lower cone and the central tube key is installed.

7, according to claim 5 pair of central tube drillable packer, the engagement place Cross section Design that it is characterized in that male expansion ring and female expansion ring is for semicircle.

8, according to claim 7 pair of central tube drillable packer, the end face that it is characterized in that glue tube base is fully closed.

9, according to claim 8 pair of central tube drillable packer, the outside that it is characterized in that gland and lower contact have along circumference and are no less than one half slot.

10, according to claim 9 pair of central tube drillable packer is characterized in that there is tongue and groove the upper end of central tube and the lower end of lower contact.