CN201314201Y - Technical joint for underground high pressure FRP pipe - Google Patents

Abstract

The utility model relates to a technical joint for underground high pressure FRP pipe, which consists of the nipple of a metal pipe (1), glass fibers (2), a glass enamel (3), a handle (4), a threaded head (5) and an O-shaped rubber seal ring (6). The technical joint for underground high pressure FRP pipe is characterized in that the nipple of metal pipe (1) consists of the handle (4) and the threaded head (5); the inner surface thereof is coated with the glass enamel (3); the glass enamel (3) is used to carry out pretreatment on the inner surface of the processed nipple of the metal pipe (1). The technical joint for underground high pressure FRP pipe has the advantages of preventing various unknown water in wells from corroding the metal pipe and increasing the connection strength.

Description

Down-hole high pressure glass reinforced plastic pipe process connection

One, technical field:

A kind of down-hole high pressure glass reinforced plastic pipe process connection is applicable to the oil-field flooding pipeline, is specially adapted to the joint of well high-pressure glass steel down-hole, oil field pipe.

Two, background technology:

In order to solve the corrosion of waterflood-transmission line in the high salinity environment, on steel pipe, adopted thousand and one way, as: the plating of nickel phosphatization, H87 coating, glass-lined pipe etc., but the processing at aspects such as the quality of material, construction quality, pipe joints is also unsatisfactory, adopt at present the high-pressure fiberglass pipe joint to use prefabricated glass fiber material, but can't solve several respects problem 1, load can not be up to standard; Can not joint when 2, salvaging; What 3, tube wall can not be done is too thick.

Three, summary of the invention:

Down-hole high pressure glass reinforced plastic pipe process connection can overcome the above problems well, can improve the quality of product simultaneously, increases its application life.

Down-hole high pressure glass reinforced plastic pipe process connection, form by metal tube pipe nipple (1), glass fiber (2), glass glaze (3), handle (4), screw thread head (5) and the resin-sealed circle of " O " shape (6), it is characterized in that, described metal tube pipe nipple (1) is made up of handle (4) and screw thread head (5) two parts, and its inner surface scribbles glass glaze (3);

Handle (4) external surface is spill ring-type (or spiral ring), and external surface twines glass fiber (2);

Screw thread head (5) is tapered, is with the resin-sealed circle of " O " shape (6) in screw thread awl bottom.

Its advantage exists:

1, with on the hydraulic screw-on machine or when unloading box cupling, because the existence of metal handle can increase its folder power;

2, adopting conical head to connect is in order to increase bonding strength;

3, the resin-sealed circle of " O " shape is in order to seal when the metal tube pipe nipple is connected with the metal box cupling.

4, the resin-sealed corrosion-resisting function that encloses of " O " shape.

5, the metal joint inner surface adopts the glass glaze aseptic technic, and the one, increase resistance to corrosion, the 2nd, can use the metal fishing tool;

Four, description of drawings

Fig. 1, spill process connection sectional drawing

Fig. 2, spirality process connection sectional drawing

Wherein: metal tube pipe nipple (1), glass fiber (2), glass glaze (3), handle (4), screw thread head (5) and the resin-sealed circle of " O " shape (6)

Five, specific embodiment

Down-hole high pressure glass reinforced plastic pipe process connection, form by metal tube pipe nipple (1), glass fiber (2), glass glaze (3), handle (4), screw thread head (5) and " O " shape rubber seal (6), it is characterized in that, described metal tube pipe nipple (1) is made up of handle (4) and screw thread head (5) two parts, and its inner surface scribbles glass glaze (3);

Earlier carry out preliminary treatment with glass glaze (3) at metal tube pipe nipple (1) inner surface that processes, its purpose is exactly to prevent that various not clear water quality are to the corrosion of metal tube in the well.

Handle (4) external surface is processed into spill ring-type or spiral ring, hand is stuck with paste glass fiber (2) in ring-type, and is until spill or spiral are filled up, concordant with outer metallic surface, coating bisphenol A type epoxy resin then, vertically twine glass fiber (2) again, concordant with metal taper bottom surface, as deck, the last glass fiber (2) that laterally twines, as extexine, and covered (5) one of metal taper male threads, be with the resin-sealed circle of " O " shape (6) in screw thread (5) awl bottom.

Twine two～five layers of glass fiber on the glass reinforced plastic pipe mould of down-hole earlier, again the metal tube pipe nipple of finishing (1) is placed on two, its inner surface is bonded on the glass fiber inner liner, is twining at last, until intact pipe.

Being connected of metal tube pipe nipple and metal box cupling adopted tiltedly or the flat thread connection.

Claims (3)

1, a kind of down-hole high pressure glass reinforced plastic pipe process connection, form by metal tube pipe nipple (1), glass fiber (2), glass glaze (3), handle (4), screw thread head (5) and the resin-sealed circle of " O " shape (6), it is characterized in that, described metal tube pipe nipple (1) is made up of handle (4) and screw thread head (5) two parts, and its inner surface scribbles glass glaze (3).

2, down-hole high pressure glass reinforced plastic pipe process connection according to claim 1 is characterized in that, described handle (4) external surface is spill ring-type or spiral ring, and external surface twines glass fiber (2).

3, down-hole high pressure glass reinforced plastic pipe process connection according to claim 1 is characterized in that, described screw thread head (5) is tapered, is with the resin-sealed circle of " O " shape (6) in screw thread awl bottom.

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