CN2895718Y - Packer with seepage-leading slot - Google Patents

Abstract

The utility model is a packer with guide leak ditches, which comprises a tubular hollow axle and is characterized in that the two ends of the hollow axle are provided with a connected thread, an outer diameter of the hollow axle is fixed with one or more radial expansion-oriented rings along the axial direction, the pipe wall of the hollow axle is provided with a plurality of inside and outside through oil permeable holes, the surface of the outer wall of the hollow axle is provided with a plurality of guide leak ditches communicated along the axial and radial directions, and the guide leak ditches are filled with ceiba ropes or cotton ropes, and expanding rubber block core that closes in the radial expansion-oriented rings is provided outside of the hollow axle. The utility model has no assembled components or reinforcement layer, and has a simple manufacturing process; the hollow axle is provided with permeable holes and guide leak ditches, which are more conducive to the oil in the hollow axle to contact the block core rapidly through the permeable holes, increasing the expanding speed. In addition, the packer has no additional auxiliary equipment in the process of work, thereby saving energy, simplifying installation, and reducing cost in operation, and the packer is suitable for underground working environment.

Description

The packer that has seep-guiding channel

[technical field]

The utility model relates to oil field underground equipment parts, particularly a kind of packer that has seep-guiding channel in the oil well plugging process.

[background technology]

To be oil well producing or during well workover, isolating the device that the stratum is interval or the well cementation oil reservoir seals the oil well plugging packer.Only retrieve China's recent two decades patent documentation, oil well plugging technology-specific instrument packer, multinomial above 300.Various ways such as mechanical type, waterpower formula, hydraulic formula, self-sealing are arranged.U.S.6073692, the corrugated axle causes the cross sectional shape change with waterpower or mechanical force and expands.U.S.4886117 has complicated multilayer to give stress metal netting between inside and outside elastomer layer, expands when causing by borehole fluid pressure.U.S.4753444, sealing ring is made up of poly-aryl ketones etc., and when executing longitudinal pressure, the sealing ring footpath is outwards buckled and is sealed.U.S.4781249 realizes gradual expansion by valving.CN2242332Y is made up of reducing central tube and fluorine, lead-tight ring, seals by upper and lower the moving of tubing string.CN2617919Y makes the packing element expansion by the sliding metal cover.The CN1236857A water-based fluid activates packing element and realizes shutoff under the guider effect.CN2386189Y is made up of joint, lining, packing element etc., shutoff after the water inlet.Above-mentioned these packers De Que Dian is that structure is comparatively complicated.

[utility model content]

The purpose of this utility model is in order to overcome the deficiencies in the prior art, a kind of packer product that has seep-guiding channel to be provided, and this packer does not have movable part, and manufacturing process is simple, and cost is low.

The scheme that the utility model adopted is a kind of packer that has seep-guiding channel of design, it comprises the hollow mandrel of tubulose, the two ends that it is characterized in that said hollow mandrel are provided with the connection screw thread, the external diameter of hollow mandrel is fixed with one or more expanded radially guide rings vertically, also be provided with on the top layer of hollow mandrel outer wall some vertically with radially-arranged seep-guiding channel, and in seep-guiding channel, fill up kapok rope or cotton cord; The outside of said hollow mandrel is provided with the expanded radially guide ring is enclosed in the stifled core of interior expanded rubber.

The utility model compared with prior art, the Feng Ge Qi No that makes has assembled component ， No that back-up coat is arranged, manufacturing process is simple; Seep-guiding channel is set on hollow mandrel, be more conducive to oil or water in the hollow mandrel, contact with stifled core rapidly by seep-guiding channel, increase its speed of expansion 10-20%, make this packer different as required, can activate stifled core after meeting oil or water during work, the toroidal cavity between the oil pipe of shutoff oil-water well and sleeve pipe or the borehole wall voluntarily quickly is to realize the isolating purpose that the stratum is interval or cement the well selectively.And the expansion guide ring on hollow mandrel can be given and axial restraint when the stifled core of expanded rubber expands, and it is radially expanded; Simultaneously, also can improve the ability of the stifled core opposing of expanded rubber axial compression.In addition, without the auxiliary ligand complete equipment, energy conservation is installed simply during this packer work, and operating cost is low, is suitable for the underground work environment.

[description of drawings]

Fig. 1 has the packer front view of seep-guiding channel;

Fig. 2 has the packer vertical view of seep-guiding channel.

Be described in detail with reference to accompanying drawing below in conjunction with embodiment of the present utility model.

[specific embodiment]

As shown in drawings, the utility model packer is sulfided into one by the stifled core (4) of the expanded rubber of hollow mandrel (1) and hollow mandrel outside by bonding.Its hollow mandrel length is not limit, and decides according to actual needs, can be 2-8m, or longer.For ease of processing and transportation, the preferred 3-4m of suitable length can be together in series during use as required.

On hollow mandrel outer wall top layer, uniform vertically some vertical seep-guiding channels (5), radially uniform some horizontal seep-guiding channels (6), and with vertical seep-guiding channel square crossing, form the seep-guiding channel layout that is communicated with in length and breadth at the extexine of axle.Fill up kapok rope or cotton cord in the seep-guiding channel.

There is the connection screw thread (2) of suitable length at the hollow mandrel two ends, be welded with some expanded radially guide rings (3) in the hollow mandrel outside vertically, overlook vertically, the interior circle of expansion guide ring matches with the axle external diameter, and outside diameter then is slightly less than the stifled core external diameter of expanded rubber.Match with flow string in the inside and outside footpath of hollow mandrel, the stifled core outside dimension of expanded rubber is by toroidal cavity size decision between flow string and the sleeve pipe or the borehole wall.

Claims (4)

1, a kind of packer that has seep-guiding channel, the hollow mandrel that comprises tubulose, the two ends that it is characterized in that said hollow mandrel are provided with the connection screw thread, the external diameter of hollow mandrel is fixed with one or more expanded radially guide rings vertically, also be provided with on the top layer of hollow mandrel outer wall some vertically with radially-arranged seep-guiding channel, and in seep-guiding channel, fill up kapok rope or cotton cord; The outside of said hollow mandrel is provided with the expanded radially guide ring is enclosed in the stifled core of interior expanded rubber.

2,, it is characterized in that the uniform vertically some vertical seep-guiding channels in said hollow mandrel outer wall top layer, radially uniform some horizontal seep-guiding channels according to the described packer of claim 1.

3,, it is characterized in that the stifled core of the outside bonding sulfuration of said hollow mandrel expanded rubber according to the described packer of claim 1.

4,, it is characterized in that the length 3-4m of said hollow mandrel according to the described packer of claim 1.

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