Tubing hanger convenient to assemble

Abstract

A tubing hanger convenient to assemble relates to the technical field of oil production wellheads. A section of large conical ring surface is arranged on the outer side of the suspension core pipe, five grooves are formed in the large conical ring surface of the suspension core pipe from top to bottom, and a high-pressure capsule, a red copper pad, a sealing ring, a red copper pad and a high-pressure capsule are sequentially installed in each groove from top to bottom. The suspension core pipe has the advantages that the high-pressure capsules are arranged on the upper portion of the red copper pad on the upper portion of the suspension core pipe and the lower portion of the red copper pad on the lower portion of the suspension core pipe, when the suspension core pipe is installed, the high-pressure capsules on the upper side and the lower side firstly make contact with conical holes of a tubing head four-way joint, and the buffering effect is achieved; after the high-pressure capsule is compressed under the gravity effect of the suspension core pipe connected with the oil pipe, the large conical ring surface of the suspension core pipe is attached to the conical hole of the tubing head four-way joint for sealing, the sealing ring and the red copper pad are prevented from being damaged when the suspension core pipe is in hard connection with the tubing head four-way joint, the installation speed is high, and reworking is not needed.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil well head technical field especially, relate to a tubing hanger convenient to assemble. BACKGROUND

[0002] Tubing hanger is a device that supports tubing column and seals annular space between tubing and casing, when using, first tubing hanger is fixed and assembled on tubing, and then tubing hanger is lowered into tubing head four-way joint along with tubing, and the sealing mode of tubing hanger is that tubing is seated in the conical hole of tubing head four-way joint by gravity to realize the sealing of tubing-casing annulus, the upper part of tubing hanger is limited by positioning top wire, which is convenient for operation, and the speed of changing well head is fast and safe, so it is a commonly used mode for medium-deep well and conventional well, however, the following problems exist in this mode: the dead weight of tubing hanger is usually 3-5t, and there is no buffer between the conical ring surface of tubing hanger and the conical hole of tubing head four-way joint when tubing hanger is lowered, and hard impact connection can easily cause the sealing ring of tubing hanger to be scratched, and even the red copper pad of tubing hanger is damaged, which leads to process rework, and not only the efficiency is low, but also the labor intensity is large. SUMMARY

[0003] In order to solve the problem that the sealing ring is easily damaged during the installation of the tubing head hanger at present, the utility model provides a tubing hanger convenient to assemble.

[0004] The utility model provides a technical scheme: a tubing hanger convenient to assemble, including suspension core pipe, the suspension core pipe lower end is processed with connecting tubing thread, and the upper end is processed with ACME thread, the suspension core pipe outside has a section of large conical ring surface, the upper part of the large conical ring surface is large in diameter, and the lower part is small in diameter, five recesses are formed in the large conical ring surface from top to bottom, high pressure capsules, red copper pads, sealing rings, red copper pads and high pressure capsules are sequentially installed in the recesses from top to bottom, and a ring groove is formed between the sealing ring and the upper red copper pad of the suspension core pipe.

[0005] The high pressure capsules protrude from the large conical ring surface by four to five millimeters during installation.

[0006] The lower part of the ring groove is a small conical ring surface, the conical angle of the small conical ring surface is consistent with the conical head of the top wire of the tubing head four-way joint, and a transition conical ring surface is formed between the small conical ring surface and the large conical ring surface, and the taper of the transition conical ring surface is larger than that of the small conical ring surface.

[0007] The lower end of the suspension core pipe is processed with a guide conical ring surface, and the upper part of the guide conical ring surface is large in diameter, and the lower part is small in diameter.

[0008] The utility model discloses a beneficial effect is: setting up two purple copper pads of up and down on the tubing hanger, setting up the sealing ring in the middle, it is conventional technology, the utility model discloses the high pressure capsule of setting up on the upper portion of the purple copper pad of the upper portion of the suspension core tube, the lower portion of the lower portion purple copper pad, the high pressure capsule of two sides first contact with the conical hole of tubing head cross in the installation of the suspension core tube, plays the buffering effect, under the gravity effect of the suspension core tube connecting tubing, the high pressure capsule is compressed after, the large conical annular surface of the suspension core tube and the conical hole of tubing head cross are sealed by fitting, avoid the damage sealing ring and purple copper pad when the hard connection of the suspension core tube and tubing head cross, the installation speed block, need not rework. BRIEF DESCRIPTION OF DRAWINGS

[0009] BRIEF DESCRIPTION OF DRAWINGS Figure 1 It is the structure schematic diagram of the utility model;

[0010] BRIEF DESCRIPTION OF DRAWINGS Figure 2 It is the A place enlarged view of attached Figure 1

[0011] BRIEF DESCRIPTION OF DRAWINGS Figure 3 It is the installation drawing of the utility model.

[0012] In the drawing, 1 is the suspension core tube, 2 is the large conical annular surface, 3 is the purple copper pad, 4 is the sealing ring, 5 is the high pressure capsule, 6 is the annular groove, 601 is the small conical annular surface, 602 is the transition conical annular surface, 7 is the top screw, 8 is the guide conical annular surface, 9 is the tubing head cross. DETAILED DESCRIPTION

[0013] As Figures 1 to 3 Indicated, a kind of tubing hanger convenient to assemble, including suspension core tube 1, the lower end of the suspension core tube 1 is processed with connection tubing thread, upper end is processed with ACME thread, suspension core tube 1 outside has a large conical annular surface 2, the diameter of large conical annular surface 2 is large in upper portion, the diameter is small in lower portion, suspension core tube 1 is opened in five recesses from top to bottom in large conical annular surface 2, high pressure capsule 5, purple copper pad 3, sealing ring 4, purple copper pad 3 and high pressure capsule 5 are sequentially installed in recess from top to bottom.

[0014] High pressure capsule 5 is protruding four to five millimeters in the installation of large conical annular surface 2.

[0015] ​The upper and lower copper pads 3 are arranged on the tubing hanger, and the sealing ring 4 is arranged in the middle, which is a conventional technology, the upper copper pad 3 on the upper portion of the suspension core pipe 1 and the lower copper pad 3 on the lower portion of the suspension core pipe 1 are provided with high-pressure capsules 5, when the suspension core pipe 1 is installed, the high-pressure capsules 5 on the upper and lower sides are firstly contacted with the conical hole of the tubing head cross 9, and the buffering effect is achieved, under the gravity of the suspension core pipe 1 connected with the tubing, the high-pressure capsules 5 are compressed, then the large conical annular surface 2 of the suspension core pipe 1 is combined with the conical hole of the tubing head cross 9 to seal, and the damage of the sealing ring 4 and the copper pad 3 caused by the hard connection between the suspension core pipe 1 and the tubing head cross 9 is avoided, the installation speed block is achieved, and rework is not needed.

[0016] The lower portion of the annular groove 6 is a small conical annular surface 601, the conical angle of the small conical annular surface 601 is consistent with the conical head of the top wire 7 of the tubing head cross 9, and the transition conical annular surface 602 is processed between the small conical annular surface 601 and the large conical annular surface 2, the taper of the transition conical annular surface 602 is greater than that of the small conical annular surface 601, and the conical head of the top wire 7 is convenient to extend into the annular groove 6.

[0017] The lower end of the suspension core pipe 1 is processed with a guide conical annular surface 8, the upper portion of the guide conical annular surface 8 has a large diameter, the lower portion has a small diameter, and the guide effect is achieved during installation.

Claims

1. An easy-to-assemble oil pipe hanger, comprising a suspension core tube (1), characterized in that: The lower end of the suspension core tube (1) is machined with a connecting oil pipe thread, and the upper end is machined with an ACME thread. The outer side of the suspension core tube (1) has a large conical annular surface (2). The upper part of the large conical annular surface (2) has a large diameter and the lower part has a small diameter. The suspension core tube (1) has five grooves from top to bottom on the large conical annular surface (2). The high pressure capsule (5), copper gasket (3), sealing ring (4), copper gasket (3) and high pressure capsule (5) are installed in the grooves from top to bottom. The suspension core tube (1) has an annular groove (6) between the sealing ring (4) and the upper copper gasket (3).

2. The oil pipe hanger for easy assembly according to claim 1, characterized in that: The lower high-pressure capsule (5) protrudes four to five millimeters from the large conical annular surface (2) during installation.

3. The oil pipe hanger for easy assembly according to claim 1, characterized in that: The lower part of the annular groove (6) is a small conical annular surface (601). The conical angle of the small conical annular surface (601) is consistent with the conical head of the set screw (7) of the oil pipe head four-way (9). A transitional conical annular surface (602) is machined between the small conical annular surface (601) and the large conical annular surface (2). The taper of the transitional conical annular surface (602) is greater than that of the small conical annular surface (601).

4. The oil pipe hanger for easy assembly according to claim 1, characterized in that: The lower end of the suspension core tube (1) is machined with a guide conical annular surface (8), which has a large upper diameter and a small lower diameter.

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