CN200961473Y - Oil well prefilled slotted screen - Google Patents

Abstract

The utility model relates to an oil well prepack slotting screen pipe, belonging to the species of oil well sand control tube column, comprising a slotting base tube and an AP1 joint connected by the thread, wherein the slotting base tube is a steel tube which is carved a plurality of I-shaped circular troughs on the tube wall and has the thread on the tube end; the outer tube wall is covered with a metal mesh, and the outer layer of the metal mesh is provided with a slotting tube; and a gravel type ceramic gravel bed is filled inside a ring space of the slotting tube on the top of the outer layer of the metal mesh. The utility model can carry on the sand control in the thick oil horizontal well of large liquid volume, play an obstructing function to the sands in the oil well since having the larger oil access channel, and also can prevent from eroding and play a role of the well wall supporting and double layer filtering when being used.

Description

The pre-filling cutting seam sieve tube of a kind of oil well

Technical field:

The utility model relates to the pre-filling cutting seam sieve tube of a kind of oil well, belongs to sand control tubing string class.

Background technology:

The oil well production process often meets the rock stratum that shakes out, cause the blocked or construction of oil well to bring influence, for this reason, existing technology down-hole commonly used sand control pipe carries out sand control, because the sand control pipe that uses at present great majority adopt the single-deck screen bodys, mechanical strength is low, and in oil well acid corrosion-resistant not, osmotic effect is poor, can not play the sand control effect in big lifting rate oil well.

The utility model content:

The utility model purpose is in order to overcome above-mentioned shortcoming, and the pre-filling cutting seam sieve tube of a kind of oil well that provides can carry out solid sand sand control to the bigger sand well of lifting rate, and has anticorrosion, and permeance property reaches the high characteristics of intensity well.

Technical scheme:

For reaching above-mentioned purpose, the utility model comprises by the parent tube of band slot and forms by the AP1 joint of screwed connection, described slot parent tube is that a root canal wall is carved with several " worker " font circular groove, pipe end has the steel pipe of screw thread, on outer tube wall, be with wire lath, the wire lath skin is equipped with the slot pipe, is filled with gravel or pottery gravel bed in wire lath and the slot pipe ring shape space above the skin.

When this screen casing uses, be connected above the sand control pipe of going into the well by screw thread, be lowered into anti-layer of sand position in the oil well by drilling tool, just can carry out sand control, when the oil well sand grains that fluid carries in oil recovery process is blocked in the well through screen casing the time, unlikely entering causes holddown in the oil pipe, screen casing can play fixed borehole wall effect in use again in addition, screen casing has the slit of broad owing to the slot pipe in resistance sand process simultaneously, therefore, can in sand control, can improve oil well output again for the more oil well of individual well production fluid amount.

The utility model compared with prior art has distinguishing feature:

Because the space screen casing of this device is " worker " font structure, and less oil well sand grains is entered in the oil pipe, along with the fluid of big discharge capacity is taken out of ground through oil pipe, sand setting phenomenon in the well can not appear, be particularly suitable in the sand well of big discharge capacity, being suitable for.

Description of drawings:

Accompanying drawing is the utility model structural representation.

Among the figure by slot parent tube 1,, 2, plug, 4, gravel or pottery gravel, 6, the AP1 joint, 7, the slot pipe, 8, wire lath forms.

The specific embodiment:

The utility model is provided by following examples, is illustrated below in conjunction with accompanying drawing.

Among the figure, slot parent tube 1 is one and is carved with several " worker " font circular groove on tube wall, pipe end is the steel pipe that has screw thread, on outer tube wall, be with wire lath 8, wire lath is the graticule mesh with the stainless steel wire establishment, its effect is that the gravel grain of avoiding bigger enters in the screen casing, be with a slot pipe 7 at the wire lath skin, this pipe cross section top is processed with several " worker " font circular groove, and as the oil-feed duct, gravel or pottery gravel bed 4 in filling in the annular space between wire lath 8 and slot pipe 7, this gravel or pottery gravel bed are used for the gravel grain in the liquid barrier, make it to enter in the oil pipe, this screen casing can increase sand control tube body intensity undoubtedly owing to adopt double-deck slot pipe as support, adopt the structure of wire lath and gravel and pottery gravel bed in addition, can big sand grains obstruct in oil well, like this when being used for sand control, not only can sand control, can reinforce borehole wall effect again, during use, this screen cloth also has the sand well particularly suitable of anti-corrosion function preferably, particularly big discharge capacity.

Claims (1)

1, the pre-filling cutting seam sieve tube of a kind of oil well, by the band slot parent tube (1) and form by the AP1 joint (6) of screwed connection, it is characterized in that: described slot parent tube (1) is that a root canal wall is carved with several " worker " font circular groove, pipe end has the steel pipe of screw thread, on outer tube wall, be with wire lath (8), wire lath (8) skin is equipped with slot pipe (7), is filled with gravel formula pottery gravel bed (4) in wire lath (8) and the slot pipe ring shape space above the skin.

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