CN203097797U

CN203097797U - Oil field down-hole tool test well-head equipment

Info

Publication number: CN203097797U
Application number: CN 201220740708
Authority: CN
Inventors: 马国兴; 张启汉; 刘彦平
Original assignee: China Petroleum and Natural Gas Co Ltd
Current assignee: China Petroleum and Natural Gas Co Ltd
Priority date: 2012-12-28
Filing date: 2012-12-28
Publication date: 2013-07-31
Anticipated expiration: 2022-12-28

Abstract

The utility model discloses oil filed down-hole tool test well-head equipment which is designed for improving bearing strength of a component, removing safety hazards, and improving working efficiency. A four-way top face of a well-head of the well-head equipment is provided with an inserting groove and a bearing lug which are symmetrical, the side faces of the inserting groove are a working locating face and an upward lifting locating face respectively, a hanging device is provided with a welding hole which is connected with a handle, the lower portion of the outer wall of the hanging device is provided with a bearing block and a locating block which are symmetrical, the outer wall is connected with a central pipe of a limiting nut and penetrates inside the hanging device, the hanging device is located on the limiting nut, and the hanging device is connected with a well-head four-way joint through the rotation of the bearing lug and the bearing block in a matched mode. The method of threaded connection between the well-head four-way joint and the hanging device is removed, the well-head four-way joint and the hanging device are replaced by the bearing block and the bearing lug, and therefore the structure is simple and reasonable, light and convenient to operate. The hanging device and the bearing block only need to be inserted to the inserting groove of the well-head four-way joint, then are rotated by 90 degrees, and then can be simply installed in place, accordingly assembling and disassembling are quick, labor and time are saved, bearing strength is high, and working efficiency is high.

Description

Oil field downhole tool test wellhead assembly

Technical field

The utility model relates to a kind of oil field downhole tool test wellhead assembly, belongs to oil field downhole tool technical field.

Background technology

Oil field downhole tool test the complete sets of equipment are to set up for the behavior in service of simulation downhole tool in oil well, and wellhead assembly bearing and removing, the critical function of tool tubular column under the fixing and sealed well, is one of important composition of the complete sets of equipment.The well head four-way is the two big critical pieces of wellhead assembly by being threaded with hanger, before the test, hanger is screwed in the well head four-way, during work, by connecting thread the oil well inner pressuring load is delivered on the well head four-way.

The environment temperature of wellhead assembly is usually between 100 ℃-150 ℃, system works pressure reaches 60MPa, under this condition of work, screw thread will bear up to a hundred tons load, adds frequent going up and detains and shackle, be easy to produce wearing and tearing, creep and serious plastic strain, make intensity reduce, safety factor descends, and potential safety hazard produces, labor strength strengthens, and operating efficiency reduces.

Summary of the invention

The purpose of this utility model is to provide a kind of downhole tool test wellhead assembly, and the bearing strength that it can improve member eliminates safe hidden trouble, and reduces labour intensity.

Concrete technical scheme of the present utility model is as follows:

The well head four-way is provided with central stepped, the hole inwall is provided with the sealing ring II, the nose end end face be provided with is separated by and symmetry, fan-shaped slot and carrying lug, the slot side be respectively the work locating surface and on carry locating surface, the annular end face of secondary shoulder hole is positioned at carrying lug below;

Hanger barrel top is provided with the welding hole of symmetry, and this hole connects handle by welded tube; Hanger tube inwall is provided with sealing ring I, and the drum outer wall bottom is provided with symmetrical and fan-shaped carrier block and is positioned at locating piece its top, rectangle, and the locating piece side is than the angle of 3 ° of carrier block side evaginations;

Central tube outer wall bottom connects stop nut, and central tube is through in the hanger, and hanger is sitting on the stop nut; Hanger is by rotation the be connected well head four-way of carrier block with the carrying lug.

This downhole tool test wellhead assembly has been cancelled the thread connecting mode of well head four-way and hanger, replace with carrier block and carrying lug, simple structure is reasonable, operates lightly, only needs the hanger carrier block is inserted well head four-way slot, half-twist can be in place again, mounting or dismounting fast, and are time saving and energy saving, the bearing strength height, light and handy safety, high efficiency.

Description of drawings

Fig. 1 is downhole tool test well head apparatus structure schematic diagram.

Fig. 2 is the A-A sectional view among Fig. 1.

Fig. 3 is the partial enlarged drawing among Fig. 2.

Fig. 4 is a well head four-way structural representation.

Fig. 5 is the hanger structural representation.

The specific embodiment

1 to 5 couple of embodiment of the present utility model further specifies with reference to accompanying drawing:

Embodiment:

This wellhead assembly comprises well head four-way 1, stop nut 2, hanger 3, central tube 4, handle 5, welded tube 6, sealing ring I7 and sealing ring II 8:

Well head four-way 1 is provided with central stepped, the hole inwall is provided with sealing ring II 8, the nose end end face is provided with is separated by and slot 13 symmetry, fan-shaped and carrying lug 11, slot 13 sides be respectively work locating surface 14 and on carry locating surface 15, the annular end face 12 of secondary shoulder hole is positioned at carrying lug 11 belows;

Hanger 3 barrel tops are provided with the welding hole 31 of symmetry, and this hole connects handle 5 by welded tube 6; 3 inwalls of hanger are provided with sealing ring I7, and the drum outer wall bottom is provided with symmetrical and fan-shaped carrier block 32 and is positioned at locating piece 33 its top, rectangle, and locating piece 33 sides are than the angle of 3 ° of carrier block 32 side evaginations;

Central tube 4 outer wall lower thread connect stop nut 2, and central tube 4 is through in the hanger 3, and hanger 3 is sitting on the stop nut 2; The rotation of hanger 3 by carrier block 32 and the carrying lug 11 well head four-way 1 that is connected.

This downhole tool is tested the well head Unit Installation and is operated as follows:

The carrier block 32 of hanger 3 is inserted in the slot 13 of well head four-ways 1 and be sitting on the annular end face 12 of secondary shoulder hole, be rotated counterclockwise handle 5, make the side of locating piece 33 be adjacent to the work locating surface 14 of slot 13, at this moment, carrier block 32 just in time goes to carrying lug 11 belows, makes hanger 3 be in the operating position.In the time of need tripping out hanger 3, clockwise rotary handle 5, make the side of locating piece 33 be adjacent to slot 13 on carry locating surface 15, at this moment, carrier block 32 just in time transfers back in the slot 13, can on carry central tube 4, trip out hanger 3.

The side of locating piece 33 is than outstanding 3 ° angle outside the side of carrier block 32, meets the problem of card carrying lug 11 when putting forward on the carrier block 32 that prevents to cause because of locating piece 33 wearing and tearing.

Central tube 4 can move up and down in hanger 3, and its top connects tensile and compression testing machine, and the bottom connects by the test instrument.Hanger 3 is mounted and dismounted by stop nut 2 load-bearing.

Claims

1. an oil field downhole tool is tested wellhead assembly, it is characterized in that:

This wellhead assembly well head four-way (1) is provided with central stepped, the hole inwall is provided with sealing ring II (8), the nose end end face is provided with is separated by and slot (13) symmetry, fan-shaped and carrying lug (11), slot (13) side be respectively work locating surface (14) and on carry locating surface (15), the annular end face of secondary shoulder hole (12) be positioned at the carrying lug (11) below;

Hanger (3) barrel top is provided with the welding hole (31) of symmetry, and this hole connects handle (5) by welded tube (6); Hanger (3) tube inwall is provided with sealing ring I (7), and the drum outer wall bottom is provided with symmetrical and fan-shaped carrier block (32) and is positioned at locating piece (33) its top, rectangle, and locating piece (33) side is than the angle of 3 ° of carrier block (32) side evaginations;

Central tube (4) outer wall bottom connects stop nut (2), and central tube (4) is through in the hanger (3), and hanger (3) is sitting on the stop nut (2); Hanger (3) is by rotation the be connected well head four-way (1) of carrier block (32) with carrying lug (11).