CN201236652Y

CN201236652Y - Feeding and extracting tool of guiding device

Info

Publication number: CN201236652Y
Application number: CNU2008201086832U
Authority: CN
Inventors: 姜伟; 刘义刚; 付英军; 牛海峰; 张健
Original assignee: China National Offshore Oil Corp CNOOC; CNOOC Research Center
Current assignee: China National Offshore Oil Corp CNOOC; CNOOC Research Center
Priority date: 2008-06-06
Filing date: 2008-06-06
Publication date: 2009-05-13
Anticipated expiration: 2018-06-06

Abstract

The utility model relates to a tool for the feed-in and pull-out of a guiding device. The tool is characterized in that the tool comprises a cylindrical tool shaft, a housing and a plurality of auxiliary components; the tool shaft comprises a top shaft, two middle shafts and a bottom shaft which are in conical threaded connection with each other in sequence; a conical internal thread interface connected with a drill pipe is arranged on the top shaft; two circles of flange steps are arranged at the upper parts of the two middle shafts respectively; a radial through hole is formed in the middle of the bottom shaft; a pair of dead holes is formed at the bottom part of the bottom shaft to form a symmetrical whole in the radial direction; both the diameter of the top shaft and the diameter of the bottom shaft are larger than the diameter of the middle shaft; the housing consists of an upper sleeve core, a sleeve body and a lower sleeve core which are in threaded connected with each other, and a conical guide platform is arranged outside the sleeve body; and the auxiliary components include two reset springs on the two middle shafts, two small springs arranged in the dead holes, two bolt pins with cup heads, and an end cover connected with the two dead holes. The utility model solves the problem in the feed-in and pull-out of a guide device at the top part of a sand control pipe.

Description

A kind of taking-up instrument of sending into of guiding device

Technical field

The utility model relates to a kind of taking-up instrument of sending into of guiding device, particularly reenters the taking-up instrument of sending into of guiding device about a kind of offshore oilfield injection string.

Background technology

Offshore oilfield adopts the method for the injection of polymer displacement of reservoir oil to solve for improving the extraction efficient in existing oil field usually, thereby reaches the purpose of final raising recovery ratio and raising field output.Offshore oilfield is in the work of implementing polymer displacement of reservoir oil raising recovery ratio, usually the problem that runs into is: injection well (as shown in Figure 1) originally is owing to have sand control packer 20 and big section sand control pipe 30 in the pit shaft 10, when injection of polymer, can not pull out the position of these sand control pipes 30 and change packer 20, therefore, if insert the injection string 40 of multi-zone flow regulating once more, particularly in inclined shaft, tubing string is difficult to centering, and it is very big to insert difficulty smoothly.

At the problems referred to above, the applicant provides a kind of injection string to reenter guiding device 5 (as Fig. 2, shown in Figure 3), guiding device 5 is a cylindric base, and to a through hole 51 is set, the top of through hole 51 is provided with the targeting port 52 of a band tapering in the central longitudinal of base 5.Radial symmetric is provided with a pair of screwed hole 53 in the both sides, middle part of base 5, and a ring annular groove 54 is set in the bottom of base 5.Guiding device 5 can make the injection string 40 that inserts once more make things convenient for centering, still, does not have ready-made guiding device to send into the taking-up instrument at present.

Summary of the invention

At the problems referred to above, the purpose of this utility model provides the taking-up instrument of sending into that a kind of offshore oilfield injection string reenters guiding device.

For achieving the above object, the utility model is taked following technical scheme: a kind of taking-up instrument of sending into of guiding device is characterized in that: it comprises a cylindrical tool axle, an overcoat and some auxiliaries; Described tool spindle is made up of an apical axis, two axis and a lower shaft of connecting by taper thread successively; Described apical axis is provided with the internal thread interface of a band tapering that is connected with drilling rod, described two axis tops are respectively arranged with a circle flange step, described lower shaft middle part is provided with a radial direction through hole, the bottom radial symmetric of described lower shaft is provided with a pair of blind hole, and the diameter of described apical axis and lower shaft is greater than two axis; Described overcoat is by forming by upward cover core, the body that is threaded and the core of trapping, and described body outer setting has the guide table of band tapering; Described auxiliary comprises that two are arranged on the two described axis, and the back-moving spring between two described cover cores and body, two latchings that are arranged on little spring in described two blind holes and two band cup heads, and two passed two described latchings and be connected two end caps on the described blind hole.

The utility model is owing to take above technical scheme, it has the following advantages: 1, the taking-up instrument of sending into of the utility model guiding device is because the corresponding radial direction through hole that is provided with guiding device, therefore guiding device can be set in the lower shaft outside of sending into the taking-up instrument, and guiding device and tool spindle of the present utility model are fixed with pin, after by instrument guiding device being delivered to the position then, take out tool spindle by the polished rod on the pressure cut off pin again.2, the taking-up instrument of sending into of the utility model guiding device is because the corresponding a pair of blind hole of radial symmetric and little spring and two latchings of being with cup heads corresponding with the blind hole internal diameter of being provided with guiding device, therefore after guiding device being sent into the lower shaft insertion guiding device of taking-up instrument, when the latching of two band cup heads arrives the annular groove of guiding device bottom setting, under the elastic force effect of little spring, the latching of two band cup heads springs into annular groove, the guiding device base is blocked, carry guiding device then and send into the taking-up instrument, guiding device will together be extracted out.

Description of drawings

Fig. 1 is installation site, a guiding device down-hole schematic diagram

Fig. 2 is the guiding device structural representation

Fig. 3 is a pin configuration schematic diagram in the guiding device

Fig. 4 is that the utility model is sent into taking-up tool construction schematic diagram

Fig. 5 is the utility model tool spindle schematic diagram

Fig. 6 is the utility model tool spindle overcoat schematic diagram

Fig. 7 is the utility model guiding device running tool scheme of installation

Fig. 8 is that the utility model guiding device takes out the instrument scheme of installation

The specific embodiment

Below in conjunction with drawings and Examples, the utility model is described in detail.

As Fig. 4, shown in Figure 5, the utility model comprises: a cylindrical tool axle 1, an overcoat 2 and auxiliary 3.Tool spindle 1 is made up of an apical axis connecting by taper thread successively 11, two 12,13 and lower shafts 14 of axis.Be provided with the internal thread interface 15 of a band tapering at the top of apical axis 11, be used to connect drill string, be respectively arranged with a circle flange step 16 on two axis, 12,13 tops.The diameter of apical axis 11 and lower shaft 14 is provided with a radial direction through hole 17 greater than two axis at lower shaft 14 middle parts, and radial symmetric is provided with a pair of blind hole 18 in the both sides, bottom of lower shaft 14.

As Fig. 4, shown in Figure 6, overcoat 2 is made up of last cover core 21, body 22 and the core 23 of trapping, on overlap core 21, body 22 and the core 23 of trapping each other by being threaded, body 22 outer setting have the guide table 24 of band tapering, to avoid when inserting guiding device, running into the targeting port 52 on the base 5.

As shown in Figure 4, auxiliary 3 comprises latching 33 and two end caps 34 of 31, two little springs corresponding with blind hole 18 internal diameters of two back-moving springs corresponding with

axis

12,13 diameters 32, two band cup heads.

Earlier a back-moving spring 31 will be overlapped respectively on two

axis

12,13 during installation, again two

axis

12,13 are linked into an integrated entity, then body 22 is sleeved on the junction of two

axis

12,13, again upper and

lower cover core

21,23 is fixedly connected on the upper and lower end of body 22 respectively by screw thread, so that two back-moving springs 31 are limited in the upper and lower cover core 21,23.And then with apical axis 11 and lower shaft 14 respectively by being threaded on two

axis

12,13, the taking-up instrument of sending into of guiding device has just been finished basic assembling.

As shown in Figure 7, when the utility model is sent guiding device into the down-hole, may further comprise the steps:

1, at first the lower shaft 14 of tool spindle 1 lower end is inserted in the through hole 51 of guiding devices 5, make a pair of screwed hole 53 on the radial direction through hole 17 alignment guide devices 5 on the lower shaft 14;

2, two pins 6 with guiding device are screwed into from two outsides of screwed hole 53 respectively, make two polished rods 61 of two pins 6 lean out screwed hole 53 the inners, enter the radial direction through hole 17 that is positioned at lower shaft 14;

3, the apical axis 11 with tool spindle 1 is connected on the drilling rod, by drilling rod tool spindle 1 is sent into the pit shaft 30 interior (as shown in Figure 1) of preparing to implement polymer displacement of reservoir oil with whole guiding device 5;

4, by drilling rod tool spindle 1 is applied downward pressure at well head, when the pressure of tool spindle 1 reached the pressure that pin 6 cut off, polished rod 61 places of pin 6 between screwed hole 53 and radial direction through hole 17 were cut off;

5, two springs 31 and two flange steps 16 all can stop tool spindle 1 to continue to move downward, therefore the well head place can be according to the instantaneous variation of pressure (during cut-out, resistance reduces quickly, and rise) stop to exert pressure, when carrying on the drilling rod, reset for spring 31 drives tool spindle 1, entire tool axle 1 is removed, and guiding device is in place;

6, can insert the injection string 40 of multi-zone flow regulating once more by the guide effect of guiding device this moment, finish the utility model purpose.

As shown in Figure 8, the utility model when take out the down-hole, may further comprise the steps guiding device:

1, in two blind holes 18 of lower shaft 14 bottoms of tool spindle 1, puts into the latchings 33 of little spring 32 and two band cup heads respectively, and fixedly two end cap 34 (such as by being threaded, but be not limited thereto) in the end of two blind holes 38, prevent that latching 33 from being ejected by little spring 32;

2, the apical axis 11 with tool spindle 1 is connected on the drilling rod, by drilling rod tool spindle 1 is inserted in the through hole 51 of guiding device 5, and in this process, two latchings 33 are compressed in two blind holes 18 that enter lower shaft 14 under targeting port 52 conical surface effects of guiding device;

3, tool spindle 1 continues to move downward, and when latching 33 arrived annular grooves 54, under the elastic force effect of little spring 32, the latching 33 of two band cup heads just can spring in the annular groove 54 of guiding device, and the base 5 of guiding device is blocked;

4, upwards mention tool spindle 1 by drilling rod, just guiding device 5 together can be extracted.

The utility model guiding device is sent into the taking-up instrument can adopt the high strength alloy steel material.

Claims

1, a kind of taking-up instrument of sending into of guiding device, it is characterized in that: it comprises a cylindrical tool axle, an overcoat and some auxiliaries;

Described tool spindle is made up of an apical axis, two axis and a lower shaft of connecting by taper thread successively; Described apical axis is provided with the internal thread interface of a band tapering that is connected with drilling rod, described two axis tops are respectively arranged with a circle flange step, described lower shaft middle part is provided with a radial direction through hole, the bottom radial symmetric of described lower shaft is provided with a pair of blind hole, and the diameter of described apical axis and lower shaft is greater than two axis;

Described overcoat is by forming by upward cover core, the body that is threaded and the core of trapping, and described body outer setting has the guide table of band tapering;

Described auxiliary comprises that two are arranged on the two described axis, and the back-moving spring between two described cover cores and body, two latchings that are arranged on little spring in described two blind holes and two band cup heads, and two passed two described latchings and be connected two end caps on the described blind hole.