CN2779051Y - Small diameter water blocking device - Google Patents

Abstract

The utility model relates to a water plugging device used in water plugging operation of oil wells, which mainly solves the defects that when the existing water plugging device releases a packer, an eccentric plugging device needs to be thrown and fetched repeatedly, when the minimum diameter of the deformed position of a casing tube is from 100 mm to 114 mm, passage can not be completed. The utility model is characterized in that an eccentric hole is arranged in a main body working barrel (2), the outer wall of the main body working barrel (2) is provided with an eccentric liquid inlet hole 5, and an inner liquid inlet hole (8) is arranged between the inner wall of the main body working barrel (2) and a main body passage; an upper push rod (6) is screwed with the upper part of the eccentric hole of the main body working barrel (2), a lower screw plug (9) is screwed with the lower end part of the eccentric hole, and the lower part in the eccentric hole is provided with a sliding sleeve (3); the sliding sleeve (3) and the main body working barrel (2) are fixed by a releasing pin (4), and the valve ball (7) is clamped between the upper push rod (6) and the sliding sleeve (3). The utility model has the characteristics that an eccentric plugging device doesn't need to be thrown and fetched repeatedly, when the minimum diameter of the deformed position of a casing tube is from 100 mm to 114 mm, passage can be completed.

Description

Minor diameter water blockoff device

Technical field:

The utility model relates to the water clogging tool that uses on a kind of oil field in the oilwell water shutoff construction, especially relate to a kind of minor diameter water blockoff device.

Background technology:

On the oil field for the oil-water well of Ф 140mm cased hole completion, the water blockoff device that existing water-plugging technology adopted, maximum outside diameter is more than the Ф 114mm, produce passage and adopt eccentric pulling mode, there is following problem in this water blockoff device: the one, when plug water construction need discharge Packer for blocking water, need the special-purpose eccentric blanking plug of pulling repeatedly, must be in sealing state or production status to guarantee full well casing post; The 2nd, this kind water blockoff device can only not have distortion or distortion back latus rectum to construct greater than the oil well of Ф 114mm to sleeve pipe, and for the minimum latus rectum at the casing deformation position oil-water well at Ф 100mm～Ф 114mm, existing water blockoff device can't be by the modification point of above-mentioned latus rectum.

The utility model content:

In order to overcome existing water blockoff device needs the eccentric blanking plug of pulling repeatedly and can't pass through during at Ф 100mm～Ф 114mm when the minimum latus rectum at casing deformation position when discharging packer deficiency, the utility model provides a kind of minor diameter water blockoff device, this kind minor diameter water blockoff utensil has the characteristics that can need not the eccentric blanking plug of pulling repeatedly, and can pass through during at Ф 100mm～Ф 114mm when the minimum latus rectum at casing deformation position.

The technical solution of the utility model is: this kind minor diameter water blockoff device, mainly comprise top connection, adopt the body of work tube that is threaded, the lower contact that is threaded with the body of work tube with top connection, wherein in the body of work tube, have an eccentric orfice, on its outer wall, have an eccentric inlet opening, have interior inlet opening within it between wall and body passageways, the top of the eccentric orfice of upper ejector pin by being threadedly connected to the body of work tube, following plug is by being threadedly connected to the bottom of eccentric orfice.The bottom is provided with a sliding sleeve in eccentric orfice, fixes by release pin between this sliding sleeve and the body of work tube, and valve ball then is stuck between upper ejector pin and the sliding sleeve.

The utlity model has following beneficial effect: owing to take the minor diameter water blockoff device of such scheme in the body of work tube, to be provided with eccentric channel and body passageways, when going into the well, tubing string eccentric orfice inner sliding sleeve and body of work tube are fixed together owing to pin, valve ball blocks feed pathway, play not kill-job of tubing string effect, when discharging Packer for blocking water, exert pressure to tubing string by ground, when packer discharges, eccentric sliding sleeve and valve ball is stressed cut off pin after, the eccentric orfice inner sliding sleeve is descending, this moment, valve ball can be up and down in eccentric orfice, after the tubing string internal pressure disappears, the outer liquid of tubing string enters in the eccentric orfice by feed pathway, enter in the tubing string by interior inlet opening again, therefore make to need not the eccentric blanking plug of pulling repeatedly, improved operating efficiency at the release packer.In addition, owing to adopted this structure, make the maximum outside diameter of water blockoff device narrow down to 100mm by 114mm, operating pressure has realized the plug water construction to the minimum latus rectum at casing deformation position casing failure well when the Ф 100mm～Ф 114mm more than 20MPa.

Description of drawings:

Accompanying drawing 1 is a structure sectional view of the present utility model.

1-top connection among the figure, 2-body of work tube, 3-sliding sleeve, 4-release pin, the eccentric inlet opening of 5-, the last jackscrew of 6-, inlet opening in the 7-valve ball, 8-, plug under the 9-, 10-lower contact.

The specific embodiment:

The utility model is described in further detail below in conjunction with accompanying drawing:

As shown in Figure 1, this kind minor diameter water blockoff device comprises top connection 1, the body of work tube 2 that is threaded with top connection, be provided with body passageways and eccentric channel at body of work tube 2, eccentric channel is built-in with sliding sleeve 3, the release pin 4 of stationary body seating nipple and sliding sleeve, body of work tube eccentric orfice is provided with eccentric inlet opening 5, the last jackscrew 6 that is threaded with body of work tube 2 eccentric orfice tops, place the valve ball 7 in body of work tube 2 eccentric orfices, inlet opening 8 in being provided with between body of work tube 2 eccentric orfices and the body passageways, the following plug 9 that is connected with body of work tube 2 eccentric orfice lower thread, the lower contact 10 that is threaded with body of work tube 2.

Actual when carrying out plug water construction, the utility model is arrived the oil reservoir position with supporting water clogging tool down with oil pipe, because release pin 4 is fixed together sliding sleeve 3 and body of work tube 2, feed pathway 5 was blocked, and plays not kill-job of tubing string effect when tubing string was gone into the well.When needs discharge Packer for blocking water, pump into 15MPa～20MPa pressure by ground installation to oil pipe, when discharging packer, pressure enters in the eccentric orfice by the interior inlet opening 8 between body of work tube 2 eccentric orfices and body passageways, pressure acts on eccentric orfice inner sliding sleeve 6 and valve ball 7, after cutting off pin 4, the eccentric orfice inner sliding sleeve is descending, this moment, valve ball 7 can be up and down in eccentric orfice, and after the tubing string internal pressure disappeared, the outer liquid of tubing string entered in the eccentric orfice by feed pathway 5, enter in the tubing string by interior inlet opening 8 again, the water blockoff device is in production status, can repeat by ground in the face of the tubing string release packer of exerting pressure, when discharging packer at every turn, the eccentric orfice valve ball is descending to be sitting on the eccentric sliding sleeve, tubing string all is in sealing state, and after pressure disappeared, the water blockoff device was in production status.

Structure of the present utility model is compared with water block device in the past, can guarantee when releasing packer Need not repeatedly pulling eccentric plugging, therefore improved operating efficiency; In addition, owing to adopted This structure makes the maximum outside diameter of water block device narrow down to 100mm by 114mm, operating pressure More than 20MPa, having realized can be to the minimum latus rectum at casing deformation position at Ф 100mm～Ф The plug water construction of casing failure well during 114mm.

Claims (1)

1, a kind of minor diameter water blockoff device, comprise top connection (1), the body of work tube (2) that is threaded with top connection (1), the lower contact (10) that is threaded with body of work tube (2), it is characterized in that: in body of work tube (2), have an eccentric orfice, on its outer wall, have an eccentric inlet opening (5), have interior inlet opening (8) within it between wall and body passageways, the top of the eccentric orfice of upper ejector pin (6) by being threadedly connected to body of work tube (2), following plug (9) is by being threadedly connected to the bottom of eccentric orfice, a sliding sleeve (3) is arranged at the bottom in eccentric orfice, fixing by release pin (4) between sliding sleeve (3) and the body of work tube (2), valve ball (7) is stuck between upper ejector pin (6) and the sliding sleeve (3).

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