CN2230348Y - Combined multi-function wellhead assembly for injecting and producing oil - Google Patents

Abstract

The utility model discloses a wellhead device used for the injection exploitation well of the oilfield exploitation, which mainly comprises the four-way component of a main body and an oil pipe head. The key point is that the oil pipe head comprises a fixed type and a rotary type. The four-way component of the main body and the oil pipe head are cylinder sealing. The outlet of the oil pipe and the outlet of the sleeve pipe are not on the same plane surface. The upper portion of the rotary oil pipe head is provided with a small valve with a +-shaped middle portion and a concave circular-arc-shaped outer side. The utility model can be used for the conventional injection exploitation well by being provided with the oil pipe head in a fixed type comprising a mandrel hanger and a pressure ring. The utility model can be used as the wellhead device of the well with special process by being provided with the oil pipe head in the rotary type comprising the mandrel hanger, a thrust ball bearing and the small valve. The ground pipeline is not disassembled in down-well operation.

Description

Multifunctional assembled injection-production well mouth device

The utility model relates to the well head part flow arrangement that is used for oilfield exploitation oil well or water injection well, common name production tree or injection-production well mouth.

Have tubing head rotatable and have be called " multifunctional oil wellhead " of instrument connection in the prior art, but the switch in its eccentric testing hole is a rack drives tooth plate, so poor sealing performance in upper flange; Tubing head is gone in the four-way awl seat with cone form seat, like this when oil pipe is overweight or after this well carried out pressure break, well stimulation, tubing head was easily clamp-oned in the four-way, causes the difficulty of well pulling job; Oil pipe, sleeve pipe outlet design make operating worker not easy to identify at grade, dislocation may occur installing; In four-way main body left side, there is an inclined to one side hole to be communicated with, can influences echometer test effect according to the field worker reflection with sleeve pipe; In addition, must dismounting upper flange bolt ability rotation pipeline head.

The purpose of this utility model is to provide a kind of multifunctional assembled injection-production well mouth device, to overcome the deficiency of above-mentioned production wellhead.

The utility model mainly is made up of main body four-way and tubing head, its main points are: it is that cylinder seals that the main body four-way cooperates with tubing head, can avoid that tubing head is squeezed in the four-way under gravity or pressure effect, the outlet that is communicated with oil pipe and sleeve pipe on the main body four-way has prevented to install dislocation not on same plane.Tubing head is divided into two kinds of fixed and rotary types, and the former is used for conventional oil well or water injection well, and it is made up of cylinder tubing hanger and pressure ring; The latter is made up of cylindrical tubing hanger, thrust ball bearing and the top minor valve of two through holes inside, is applicable to that eccentric testing, following electric submersible pump cable reach the producing well of mixing special process requirements such as electric heating cable down.Because the restriction of pithead position size is through hole up and down so design, at a side switch, the outside, one side is the minor valve of the decussate texture of recessed garden arc in the middle part of the valve body, is convenient to operation, maintenance or replacing.

Compare with existing injection-production well mouth commonly used, the utility model height can reduce about more than 60%, and weight reduces more than 30%, and manufacturing cost reduces by 30%, because oil pipe pipeline and sleeve pipe pipeline are fixed on main body four-way both sides, need not dismantle pipeline in addition so remove the oil pipe operation.

Compare with existing " multifunctional oil wellhead ", after the utility model is loaded onto fixed tubing head, promptly can be used for water injection well, whale and various pumpingh well, change rotary tubing head after, promptly can be used for eccentric testing well, electric submersible pump pumpingh well and under mix electric heating cable thickened oil recovery well etc.; Need not dismantle well head upper flange bolt and can rotate down-hole oil tube arbitrarily, steel wire coiled tubing and prevent the eccentric wear etc. of down-hole pump in the time of can removing eccentric testing; Can be directly supporting and do not influence the test effect with existing echometer; Manufacturing cost can reduce by 20%.

Below in conjunction with drawings and Examples the utility model is elaborated.

Fig. 1 is conventional injection-production well wellhead assembly schematic diagram, wherein: 1 main body four-way; 2 cylinder tubing hangers; 3 pressure rings; 4 upper flanges; The outlet of 5 sleeve pipes; The outlet of 6 oil pipes.

The rotary type wellhead assembly schematic diagram that Fig. 2 uses for special well, wherein: 1 main body four-way; 2 cylindrical tubing hangers; 10 thrust ball bearings; 4 upper flanges; The outlet of 5 sleeve pipes; The outlet of 6 oil pipes; 7 rotate jack; 8 minor valves; 9 upper flange bolts.

Fig. 3 is the minor valve structural representation, and wherein: 11 is through hole, and 12 is handle, and 13 is recessed garden arc valve body.

Main body four-way 1 both sides are sleeve pipe outlet 5 and oil pipe outlet 6 among Fig. 1, middle base cylinder tubing hanger 2, the middle part is the cylinder sealing between the two, the bottom is that the awl seat of a wide-angle matches, to avoid tubing hanger 2 under gravity or the pressure effect easily to clamp-on defective in the main body four-way 1, main body four-way 1 top is connected with upper flange 4; Cylinder tubing hanger 2 is formed fixed tubing head with pressure ring 3, and down-hole oil tube is pressed in tubing hanger 2 bottoms; Pressure ring 3 places tubing hanger 2 tops, under the restriction of upper flange 4 to prevent that tubing hanger 2 from moving up under the borehole pressure effect; Oil pipe outlet 6 is higher than sleeve pipe outlet 5, be mainly to avoid operation and occur dislocation when installing, also for present scene in general oil pipe outlet to be higher than the convention of sleeve pipe outlet corresponding, be convenient to workman's operation.

Main body four-way 1 both sides are sleeve pipe outlet 5 and oil pipe outlet 6 among Fig. 2, the cylindrical tubing hanger 2 of middle base, the middle part is the cylinder sealing between the two, the bottom is that the awl seat of a wide-angle matches, to avoid tubing hanger 2 under gravity or the pressure effect easily to clamp-on defective in the main body four-way 1, main body four-way 1 top is connected with upper flange 4; Cylindrical tubing hanger 2 tops connect minor valve 8, thrust ball bearing 10 is inserted in the middle and upper part, top-side is rotated jack 7 by one and is used to rotate the rotary type tubing head of being made up of tubing hanger 2, thrust ball bearing 10 and minor valve 8, there are two through holes inside, one connects oil pipe, and another is lowered to usefulness such as cable for eccentric testing; The relative position of sleeve pipe outlet 5 and oil pipe outlet 6 and effect are with identical described in Fig. 1; Minor valve 8 is because of the restriction of each component locations size of well head, so be designed to lower through-hole 11, at a side switch knob 12, the middle part of valve body 13 outside on one side is the decussate texture of recessed garden arc, so that operation, maintenance or replacing.

Claims (4)

1, the multifunctional assembled injection-production well mouth device that is used for oilfield exploitation oil well or water injection well, mainly form by main body four-way and tubing head, it is characterized in that: it is the cylinder sealing that the main body four-way cooperates with tubing head, and the outlet of connection oil pipe and sleeve pipe is not or not same plane on the main body four-way.

2, multifunctional assembled injection-production well mouth device according to claim 1 is characterized in that: can form fixed tubing head by cylinder tubing hanger and pressure ring.

3, multifunctional assembled injection-production well mouth device according to claim 1 is characterized in that: can form the rotary type tubing head by inside by cylindrical tubing hanger, thrust ball bearing and the top minor valve of two through holes.

4, multifunctional assembled injection-production well mouth device according to claim 3, it is characterized in that: minor valve is a decussate texture, the valve body middle part outside on one side is a recessed garden arc.

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