CN2403888Y

CN2403888Y - Positioner on oilwell operating pipe column

Info

Publication number: CN2403888Y
Application number: CN 99245731
Authority: CN
Inventors: 姚国富; 王天刚; 赵齐禄; 王玉琢; 赵立志
Original assignee: NO 2 OIL PRODUCTION FACTORY DA
Current assignee: NO 2 OIL PRODUCTION FACTORY DA
Priority date: 1999-09-24
Filing date: 1999-09-24
Publication date: 2000-11-01
Anticipated expiration: 2009-09-24

Abstract

The utility model relates to an underground positioner for pipe column production of oilfield wells. The utility model can accurately define the position of equipment on underground pipe columns. The positioner is connected with a center pipe 6 through a barrel body 1, wherein, the center pipe is sheathed with a centralizer and a derailing switch; a support body 2 and an elastic sheet 3 which protrudes towards a groove 13 from the barrel body are arranged in the barrel body 1; the elastic sheet 3 is provided with a convex clamping body 17 which can be clamped on a ring groove in a magnetic positioning coupling on a sleeve pipe on a well body in the process of descent to define the descent position of the underground equipment on the pipe columns. Because the position of the magnetic positioning coupling on the sleeve pipe is defined, the positioner can be used for defining the position of the underground equipment on the pipe columns without other disturbance.

Description

Down-hole locator on the well flow string of oil field

The utility model relates to a kind of down-hole locator that is used on the well flow string of oil field.

Need be lowered to flow string when oil well or well ordinary production on the oil field, be the duty that guarantees that it is stable, some member need accurately be located in the down-hole on the tubing string.At present, fixedly flow string position of " shaft bottom " mode is extensively adopted in the oil field, is promptly determined the position of flow string to the well depth in shaft bottom by well head; But owing in the fluid process, have silt particle to be settled down to the shaft bottom in producing, cause well depth uncertain, influence the location of flow string.In addition, adopt fixedly tubing string position of " slips anchoring " mode, adopt this mode slip insert often to cause certain infringement to sleeve pipe.

The purpose of this utility model is to avoid the problem that exists in the above-mentioned present technology, and down-hole locator on a kind of oil field well flow string that may be stuck in the magnetic orientation box cupling annular groove of position on the well bore sleeve pipe determining is provided, because of determining the position of magnetic orientation box cupling on the well bore sleeve pipe, this locator is not influenced by other factors, can accurately determine the flow string position.

The purpose of this utility model can reach by the following technical programs: the cylindrical shell that is threaded on flow string, the central tube that is threaded on this cylindrical shell lower end necking is with centralizer on the central tube.Wherein have axial slots on the central tube; Upwards have the axial groove and the narrow groove that is communicated to the lower end of 2 pairs of correspondences along week at the cylindrical shell middle part.The supporter that is threaded is housed in above-mentioned cylindrical shell, and its two ends are the ladder convex ring body; Have on the big convex ring body in two ends with cylindrical shell on the corresponding 2 pairs of grooves of groove, be drilled with the spring stack hole on the cylinder of middle part, cylindrical spring is housed in the hole.The corresponding flexure strip of edge in each groove on the cylindrical shell, its middle part is generous, two ends are narrow thin, and the upper end, middle part forms the ladder convex fastening body, the lower end forms outer surface groove; During installation, narrow thin two ends embedded groove inwall is stuck on the convex ring body of inner support body two ends in the groove, and wherein the flexure strip middle part is pressed on the supporter spring.Between above-mentioned cylindrical shell and centralizer, be with derailing switch on the central tube, have at the bottom of its annulus 4 upwards and with cylindrical shell on the corresponding slotting body of narrow groove; During installation, 4 slotting bodies respectively close at barrel along sliding on the narrow groove on the cylindrical shell through flexure strip lower end surface groove compressing flexure strip, and wherein convex fastening body is protruding in external on the flexure strip; On at the bottom of the annulus of derailing switch, have cross through hole, pass the distance of the upper and lower slip of slotted eye limit switch device on central tube with bolt.

In such scheme, the cylindrical shell upper end is connected on the tubing string by the nut that is threaded again.The length of slotted eye should equal the length sum of narrow groove and flexure strip ramp groove on the cylindrical shell on the central tube.Constitute this locator by such scheme, upper and lower slip by slidingtype centralizer gauge tap device, when magnetic orientation box cupling inner groove that tubing string is determined to down well placement down, move on the sliding pull switch device on the centralizer, the compressing flexure strip closes at barrel, but convex fastening body is stuck in the magnetic orientation box cupling inner groove on it, thereby can realize its purpose.

The utility model is compared with above-mentioned present technology can have following effect: adopt this locator, in the process of going into the well with tubing string, flexure strip closes at body wall on the locator, smoothly under the lower going-into-well; Instantly to the well bore sleeve pipe of down-hole during the magnetic orientation box cupling, by the upper lifting pipe post, the slidingtype centralizer is descending, and derailing switch is along with descending, and shell fragment is released on the locator, and wherein convex fastening body is stuck in the magnetic orientation box cupling inner groove, realizes accurately location.When needing unfreezing to trip out, the upper lifting pipe post, flexure strip with the effect of well bore casing wall friction under shrink, just can trip out smoothly.

Accompanying drawing 1 is that this locator partly cuts open figure;

Accompanying drawing 2 is A-A sectional drawings on Fig. 1;

Accompanying drawing 3 is front views of flexure strip 3 on Fig. 1;

Accompanying drawing 4 is vertical views of Fig. 3;

Accompanying drawing 5 is left views of Fig. 3;

Accompanying drawing 6 is derailing switch sectional views on Fig. 1;

Accompanying drawing 7 is that Fig. 1 upper shell 1 half cuts open figure;

Accompanying drawing 8 is A-A sectional drawings on Fig. 7;

Accompanying drawing 9 is that Fig. 1 upper support body 2 half cuts open figure;

Accompanying drawing 10 is A-A sectional drawings on Fig. 9;

To be further described the utility model below in conjunction with accompanying drawing:

By Fig. 1 in conjunction with shown in Figure 7, the cylindrical shell 1 that is threaded on the oil well production string, the central tube 6 that is threaded on the cylindrical shell 1 lower end necking has axial slots 8 on the central tube 6, also be with centralizer 5 on the central tube 6; At cylindrical shell 1 middle part along the axial groove 13 that upwards has 2 pairs of correspondences week be communicated to the narrow groove 14 of lower end.At cylindrical shell the supporter 2 that is threaded is housed from top to bottom for 1 li, the two ends of supporter 2 are the ladder convex ring body, and it is as the wheel that axle is arranged; Have on the big convex ring body in two ends with cylindrical shell 1 on groove 13 corresponding 2 pairs of grooves 15, be drilled with spring stack hole 16 on the cylinder of middle part, cylindrical spring 11 is housed in the hole.Each groove is bumped into corresponding flexure strip 3 for 13 li on cylindrical shell 1, and the middle part of sheet 3 is generous, two ends 22 are narrow thin, and the upper end, middle part forms ladder convex fastening body 17, the lower end forms outer surface groove 18, shown in Fig. 3～5; During installation, sheet 3 is stretched on it middle part from cylindrical shell stretch out from groove 13, narrow thin two ends embedded groove 13 inwalls are stuck on the inner support body 2 two ends convex ring bodies 15 li of grooves, and wherein sheet 3 middle parts are pressed on supporter 2 springs 11, make sheet 3 constitute elastic bodys.Between cylindrical shell 1 and centralizer 5, be with derailing switch 4 on the central tube 6, form at the bottom of the annulus of derailing switch 4 upwards and with cylindrical shell 1 on groove 14 corresponding slotting bodies 20; During installation, 4 slotting bodies 20 each along sliding on sheet 3 lower end transition surface grooves 18 on the groove 14 on the cylindrical shell 1, pressure film 3 closes in tube 1 wall, but wherein on the flexure strip 3 convex fastening body 17 protruding in external.On at the bottom of the annulus of derailing switch 4, have cross through hole 21, wear the distance that bolt slotted eye 8 on central tube 6 comes the upper and lower slip of limit switch device.

Cylindrical shell 1 upper end is connected on the flow string by thread cap 7, and cylindrical shell is had protective effect.The length of slotted eye 8 should equal the length sum of groove on the cylindrical shell 1 14 and flexure strip 3 ramp grooves 18 on the central tube 6.Centralizer 5 all is housed on the running string, and this centralizer 5 slides on central tube 6; By moving on the sliding pull switch device 4 of going up of it, make sheet 3 close at cylindrical shell.All be connected to the magnetic orientation box cupling that the position is determined on every mouthful of well bore sleeve pipe, form annular groove between two casing heads in the box cupling, this locator is in the process of going into the well, and convex fastening body 17 can be stuck in this annular groove on it, thus the location.By shown in Figure 4, process Installation hole 19 is arranged on the sheet 3.By shown in Figure 1, there are top connection 9, lining that lining 10 is arranged on the centralizer 5, the plug 12 that prevents the centralizer slippage is arranged in central tube 6 lower ends.

Claims

1. a down-hole locator that relates on the well flow string of oil field has slidingtype centralizer 5, it is characterized in that:

A. the cylindrical shell (1) that on flow string, is threaded, the central tube (6) that is threaded on its lower end necking has axial slots (8) on the central tube, and centralizer (5) is enclosed within on the central tube; At all narrow grooves (14) that upwards has the axial groove (13) of 2 pairs of correspondences and be communicated to the lower end in edge, cylindrical shell (1) middle part;

B. in cylindrical shell (1) lining the supporter (2) that is threaded is housed, its two ends are the ladder convex ring body, have on the big convex ring body in two ends with cylindrical shell (1) and go up the corresponding 2 pairs of grooves of groove (13) (15); Be drilled with spring stack hole (16) on the cylinder of middle part, cylindrical spring (11) is housed in the hole;

C. go up each groove (13) lining at cylindrical shell (1) and be bumped into corresponding flexure strip (3), its middle part is generous, two ends are narrow thin, and the upper end, middle part forms ladder convex fastening body (17), the lower end forms outer surface groove (18); Narrow thin two ends embedded grooves (13) inwall is stuck in groove (15) lining on the convex ring body of inner support body (2) two ends, and wherein flexure strip (3) middle part is pressed on supporter (2) spring (11);

D. go up at central tube (6) and between cylindrical shell (1) and centralizer (5), be with derailing switch (4), at the bottom of its annulus, have 4 upwards and with cylindrical shell (1) to go up the corresponding slotting body of narrow groove (14) (20); During installation 4 slotting bodies (20) each go up groove (14) along cylindrical shell (1) and go up and slidingly close at tube (1) wall through flexure strip (3) lower end surface groove (18) compressing flexure strip, it is protruding in external that wherein flexure strip (3) is gone up convex fastening body (17); On at the bottom of the annulus of derailing switch (4), have cross through hole (21), wear bolt is gone up the upper and lower slip of slotted eye (8) restriction through central tube (6) distance.

2. locator according to claim 1 is characterized in that: cylindrical shell (1) upper end screw thread coupling nut (7).

3. locator according to claim 1 is characterized in that: the length of the last slotted eye (8) of central tube (6) should equal cylindrical shell (1) and go up the length sum that groove (14) adds flexure strip (3) ramp groove (18).