CN201358760Y

CN201358760Y - Oil and gas production pipe

Info

Publication number: CN201358760Y
Application number: CNU2009200066291U
Authority: CN
Inventors: 朱云波
Original assignee: FIRST FILTER (TIANJIN) Co Ltd
Current assignee: FIRST FILTER (TIANJIN) Co Ltd
Priority date: 2009-03-05
Filing date: 2009-03-05
Publication date: 2009-12-09
Anticipated expiration: 2019-03-05

Abstract

An oil and gas production pipe comprises base pipes and sand prevention screen sleeves. Each base pipe is provided with at least one flow orifice area, two ends of each base pipe are provided with connecting areas, and through the connecting areas, the base pipes can be connected end to end to form a production pipe column with proper length. Each sand prevention screen sleeve corresponding to each flow orifice area is sleeved outside each base pipe, which is a pipe element formed by firstly forming the caliber by spirally bending a banded filter plate along the inner surface thereof and then spirally boxing the relative long edges of the banded filter plate in virtually sealing form. The outer surface of the banded filter plate before spiral bending is provided with a plurality of counter bore type flow holes formed by punching towards the inner surface thereof, and oil and gas fluid flow clearances with proper widths are arranged on walls of the flow holes to separate oil and gas fluid from sand. The oil and gas production pipe and the processing technique are low in cost and fine in circulation, are corrosion resistant, can not only meet use requirements of vertical wells and direction wells but also meet use requirements of large-scale production of horizontal wells.

Description

Oil/gas exploitation pipe

Technical field

The utility model relates to a kind of oil/gas exploitation pipe, particularly has the exploitation pipe of oil-sand separation function in the oil-gas mining process.

Background technology

At present, in petroleum industry oil-gas mining process in order to prevent that sand production of oil-gas wells from causing sleeve pipe, device damage and causing the underproduction, adopts cutting seam sieve tube, the wire-wrapped screen sand control more.

Cutting seam sieve tube is to adopt blade or laser cutting to go out the narrow slit of certain-length certain width.Its process equipment complexity and efficient are low; Product sand control precision is not high, perishable, the life-span is not long; The product aperture area is little, is generally 1% to 6%, and the fluid trafficability characteristic is poor.To be used for output lower more, and it is not serious to shake out, and the particle that shakes out is big and need in the well that the stratum supports.

Wire-wrapped screen is to turn to the filter screen with V-type seam with the triangle stainless steel wire, and cover is welded on the sleeve pipe that has bored the hole again.Because wire-wrapped screen adopts the screen jacket of stainless steel as crossing filter ruffle, has corrosion-resistant good characteristics; The aperture area of wire-wrapped screen is generally 8% to 30% simultaneously, and the fluid trafficability characteristic is better.But its complex process, cost are higher; Meet the easy sealing-off of high temperature, can not adapt to thermal production well; Because it crosses the yielding sand control ability that loses of filter ruffle, can not bear bigger bending simultaneously, not be suitable for the horizontal well operation.Usually be used in straight well at present, the cased hole gravel packing sand control treatment of directional well.

Therefore seek and a kind ofly can replace above two kinds of screen casings, processing technology is good, and cost is lower, and is corrosion-resistant, and circulation is good, can satisfy the straight well directional well and use the sand control screen that can satisfy the horizontal well use of large-scale production again to become the task of top priority.

The utility model content

Provide a kind of oil/gas exploitation pipe for solving the problems of the technologies described above the utility model.

Wherein oil/gas exploitation pipe comprises: be provided with the parent tube of an overcurrent eyelet area at least, described parent tube two ends are provided with join domain, so that a plurality of described parent tube can be end to end to form the mining tubular column of suitable length; Be placed in outside the described parent tube and the sand control screen jacket of fixedlying connected with described overcurrent eyelet area is corresponding with described parent tube; Wherein said sand control screen jacket serve as reasons banded filter plate through along the inner surface helical buckling of filter plate forming caliber, and the pipe fitting that the spiral boxing of the long relatively limit substantial seal of described banded filter plate is formed.

Described banded filter plate is provided with a plurality of hole countersunk openings by forming towards its inner surface direction punching press on its external surface before helical buckling, on the hole wall of described opening, be provided with the hydrocarbon fluids circulation slit of proper width, so that change the hydrocarbon fluids flow direction, reduce flow velocity, alleviate fluid erosion, and make hydrocarbon fluids enter the inside of screen casing and sandstone is isolated.Wherein preferably, described opening is the longitudinal section bridge-type counterbore of shape in echelon, is provided with the described hydrocarbon fluids circulation slit that forms through punching press near the bottom, hole on the relative long side wall surface of described counterbore.Wherein said opening is the longitudinal section bridge-type counterbore of shape in echelon preferably, is provided with the fluid flow slit through being stamped to form on the long relatively side wall surface of counterbore.The width dimensions in described circulation slit can be 0.1mm-1.5mm to adapt to different underground sandstone sizes.

As further improvement, described parent tube can have a plurality of overcurrent eyelet area, and the utility model preferably adopts a plurality of described screen casings corresponding with it, forms multistage connection.

Advantage of the present utility model is exactly, and has oil gas and impacts for a short time, corrosion-resistant, and aperture area is big, production efficiency is high, characteristics such as intensity height, sand block are effective, reliability height, and the spiral welding procedure of the Cai Yonging cost that both saved material is convenient to large-scale processing again simultaneously.These will specifically be set forth in the back.

Description of drawings

Fig. 1 is the semi-section schematic diagram of first implementation column of the utility model;

Fig. 2 is the semi-section schematic diagram of second implementation column of the utility model;

Fig. 3 is the partial perspective view of banded filter plate in the utility model;

Fig. 4 is the front schematic view of sand control screen jacket in the utility model.

The specific embodiment

What Fig. 1 showed is the semi-section schematic diagram of first implementation column of the utility model, and one-level connects the form that cooperates, and promptly only has a sand control screen jacket 2 and cooperates with one on the parent tube 1 corresponding overcurrent eyelet 6 zones.Technical data as preferential parent tube:

Outside dimension series is: 60.3mm, 73.0mm, 88.9mm, 101.6mm, 114.3mm, 127.0mm, 139.7mm, 168.3mm, 177.8mm;

Parent tube grade of steel series: J55, K55, N80, L80, P110,13Cr;

Overcurrent eyelet diameter series: 9.5mm, 12.7mm, 15.8mm;

Overcurrent perforation density: 160-600 hole/rice.

As shown in Figure 1, oil/gas exploitation pipe 10 comprises a parent tube 1 that is provided with overcurrent eyelet 6 zones, and described parent tube 1 two ends are provided with external screw thread 4 as join domain.An end of parent tube 1 is connecting the box cupling 5 with internal thread among the figure, adopt a plurality of described parent tubes of similar structure can be end to end to form the mining tubular column of suitable length.The zone is corresponding is placed in outside the described parent tube 1 and the sand control screen jacket 2 of fixedlying connected with described parent tube 1 with described overcurrent eyelet 6.Be provided with a pair of end ring 3 near overcurrent eyelet 6 location on the described parent tube 1, the distance that the length of sand control screen jacket 2 and described end ring are 3 adapts, so that the two ends of described sand control screen jacket 2 are fixed with described end ring 3 by welding.

What Fig. 2 showed is the semi-section schematic diagram of second implementation column of the utility model, and secondary connects the form that cooperates, and has two sand control screen jackets 2 among the figure and cooperates with two on the parent tube 1 corresponding overcurrent eyelet 6 zones.The connected mode of this secondary is strengthened the on-the-spot adaptive capacity of this product greatly, operates easier.

Fig. 4 is the front schematic view of sand control screen jacket in the utility model.In conjunction with installation drawing illustrated in figures 1 and 2 as seen, wherein said sand control screen jacket 2 serve as reasons banded filter plate 20 (see figure 3)s through along inner surface 201 helical bucklings of filter plate 20 to form caliber, and the sand control screen jacket 2 of the pipe fitting that the spiral boxing of long relatively limit 203 substantial seal of described banded filter plate 20 is formed, owing to adopt the spiral welding procedure, both be beneficial to the cost that saves material, be convenient to large-scale processing again, also have advantages of high strength simultaneously.

The partial perspective view of banded filter plate 20 in Fig. 3 the utility model, banded as seen from the figure filter plate 20 is that helical buckling does not also weld the preceding architectural feature of typing.Described banded filter plate 20 preferably material is 304, and the stainless steel material of 316L, its thickness are 1.2mm, 1.5mm or 2.0mm.Before helical buckling, on its external surface 202, be provided with a plurality of hole countersunk openings 7 by forming towards its inner surface 201 direction punching presses, the bottom 8 in hole 7 is to recessed, and is promptly recessed to inner surface 201 directions.On the hole wall of described opening 7, be provided with the hydrocarbon fluids circulation slit 9 of proper width, so that change hydrocarbon fluids (not shown) flow direction, reduce flow velocity, alleviate fluid erosion, and make hydrocarbon fluids enter the inside of sand control screen jacket 2 and the sandstone (not shown) is isolated.

Wherein preferably: opening 7 is the longitudinal section bridge-type counterbore of shape in echelon, is being provided with the described hydrocarbon fluids circulation slit 9 that forms through punching press near 8 places at the bottom of the hole on the relative long side wall surface of described counterbore.The opening 7 of bridge-type hole countersunk and be positioned at circulation slit 9 on the side wall surface and can adopt that Sheet Metal Forming Technology is disposable to process simultaneously, these fluid flow slit 9 width can accurately be controlled by punching press, it stitches wide can the design according to the particle size of oil gas well reservoir sand, both can play the effect that stops that reservoir sand enters, can be used as the output passage of oil gas again.The preferred size that the utility model proposes is described opening length: 8-15mm, width: 2-5mm, described circulation gap width: 0.1mm-1.5mm.

With this sand control screen jacket 2 be: the bridge-type counterbore of the about 20mm part in sand control screen jacket 2 two ends is flattened by hydraulic action to recessed base with the optimal way that parent tube 1 installs and fixes; Respectively end ring is inserted in the both ends of sand control screen jacket 2, enters about 20mm, be one by the CO2 shield welder weldering then.

As an index of the production efficiency of oil-gas mining, the aperture area rate of exploitation pipe is extremely important, described aperture area rate=(gross area in described circulation slit)/(described sand control screen surface area).Be understandable that aperture area more senior general help entering of oil gas more, but excessive slit will make that also sandstone enters.And by above-mentioned introduction of the present utility model, adopt the sand control screen 2 of said structure and size, can prevent effectively that sandstone from entering, can on sand control screen jacket 2, form a plurality of openings 7 simultaneously, to reach the aperture area rate that is suitable for enhancing productivity with fluid flow slit 9.After adopting said structure, aperture area rate of the present utility model can reach 20-30%, when preventing that sandstone from entering, guarantee the production efficiency of oil-gas mining.

The multiple functional structure and the embodiment that are disclosed in the utility model all obtain embodying and protection by claim, and be any according to the resulting enlightenment of the drawings and Examples shown in the utility model, all falls among the scope that the utility model protects.

Claims

1, a kind of oil/gas exploitation pipe comprises:

At least be provided with the parent tube of an overcurrent eyelet area, described parent tube two ends are provided with join domain, so that a plurality of described parent tube can be end to end to form the mining tubular column of suitable length;

Be placed in outside the described parent tube and the sand control screen jacket of fixedlying connected with described overcurrent eyelet area is corresponding with described parent tube;

Wherein said sand control screen jacket serve as reasons banded filter plate through along the inner surface helical buckling of filter plate forming caliber, and the pipe fitting that the spiral boxing of the long relatively limit substantial seal of described banded filter plate is formed.

2, oil/gas exploitation pipe as claimed in claim 1 is characterized in that: described banded filter plate is a stainless steel material, and its thickness is 1.2mm, 1.5mm or 2.0mm.

3, oil/gas exploitation pipe as claimed in claim 1, it is characterized in that: described banded filter plate is before helical buckling, be provided with a plurality of hole countersunk openings on its outer surface by forming towards its inner surface direction punching press, on the hole wall of described opening, be provided with the hydrocarbon fluids circulation slit of proper width, so that change the hydrocarbon fluids flow direction, reduce flow velocity, alleviate fluid erosion, and make hydrocarbon fluids enter the inside of screen casing and sandstone is isolated.

4, oil/gas exploitation pipe as claimed in claim 3, it is characterized in that: described opening is the longitudinal section bridge-type counterbore of shape in echelon, is provided with the described hydrocarbon fluids circulation slit that forms through punching press near the bottom, hole on the relative long side wall surface of described counterbore.

5, oil/gas exploitation pipe as claimed in claim 4 is characterized in that: described opening length: 8-15mm, width: 2-5mm, described circulation gap width: 0.1mm-1.5mm.

6, oil/gas exploitation pipe as claimed in claim 1, it is characterized in that: respectively be provided with end ring near overcurrent eyelet location on the described parent tube, distance between the length of described sand control screen jacket and described end ring adapts, so that the two ends of described sand control screen jacket are fixed with described end ring by welding.

7, as claim 1 or 6 described oil/gas exploitation pipes, it is characterized in that: described parent tube has 1 described overcurrent eyelet area along the longitudinal direction at least, arranges along the parent tube longitudinal direction with the corresponding described sand control screen of the quantity of described overcurrent eyelet area.

8, oil/gas exploitation pipe as claimed in claim 5 is characterized in that: the aperture area rate of the formed described oil/gas exploitation pipe of (gross area in described circulation slit)/(described sand control screen surface area) is 20-30%.