CN2477819Y

CN2477819Y - Anti-theft oil extracting wellhead

Info

Publication number: CN2477819Y
Application number: CN 01207953
Authority: CN
Inventors: 李桂昌; 李桂江
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-03-14
Filing date: 2001-03-14
Publication date: 2002-02-20
Anticipated expiration: 2011-03-14

Abstract

The utility model discloses a theftproof oil extracting well top comprising a tee joint having a well top connecting part. The upper opening and the lower opening of the tee joint are respectively connected with the well top connecting part and a centralizer; the centralizer is detachably connected with a blowout preventer; the other opening of the tee joint is connected with an oil transmission pipe and provided with an orifice, and the orifice is connected with a sampling valve that can be automatically closed with an inwards opening structure; and the blowout preventer is equipped with a locking device. The theftproof oil extracting well top prevents thieves from stealing crude oil easily by changing unnecessary structures into an integrated structure, and providing the necessary detachable connecting structures and the sampling connection with the locking devices and the devices that can be automatically closed and can not be opened without special tools.

Description

A kind of antitheft production wellhead

The utility model relates to a kind of production wellhead structure, especially a kind of antitheft production wellhead.

At present, production wellhead of the prior art often is provided with a plurality of outlets, and it is connected by common members such as stop valve, slide valve and flange and seals.As shown in Figure 1, it is existing common a kind of wellhead for production, by bolt 9 that gland 10 is fixed thereon on oil-out, on gland 10, establish the hole and connect four-way 12, the port relative with oil-out at following four-way 12 connects four-way 13 on again, on the relative port of last four-way 13, connect a device for adjusting deviation 4, connect a blowout prevention box 3 thereon, wherein be provided with blowout prevention plug 2, in this well head, be provided with swabs bar 1 and be connected, on the opposite side port, connect oil pipeline with the drive unit (not shown).On last four-way 13, following four-way 12, also be respectively equipped with rubber gate 5 and emptying gate 11, and produce gate 6, sample valve 8 and ball-and-seat 7.By pumping of swabs bar 1, the crude oil that can make well head is continuously by exporting in the oil pipeline.

In above-mentioned shaft collar, blowout prevention box 3, device for adjusting deviation 4, rubber gate 5, emptying gate 11, service valve 6, sample valve 8 and gland 10 etc. all are to be tightly connected with the rotary sealing appts that cooperates with it by seal to be in the same place, and are used for finishing ordinary production, pressure measurement sampling, blowout prevention, relieve a garrison and spray the operation of box sealed packing (well workover), non-return and emptying.Yet these sealing devices all can arbitrarily be dismantled or unscrew by common instrument, again owing to have certain oil pressure in the well head, so, split or unscrew and will cause leaking outside of crude oil when above-mentioned position.Now, some lawless persons usually use some general instruments to implement destruction at these positions of well head, steal crude oil easily, make each oil field hard to guard against, many necessity that not have existence are arranged in above-mentioned many gates of existing production wellhead, and had only the effect of providing convenience for the oil stealer.

The purpose of this utility model is to improve the deficiencies in the prior art, and a kind of function that guarantees that oil recovery production is normally carried out that both can have is provided, and can prevent the antitheft production wellhead that crude oil is stolen effectively again

For achieving the above object, the utility model is taked following design scheme:

This antitheft production wellhead includes the threeway that has the well head connecting elements, in two ports up and down in described threeway, under port on connect described well head connecting elements integratedly, its can be directly and oil-out connect firmly, on last port, connect device for adjusting deviation, a blowout prevention box device removably is tightly connected on described device for adjusting deviation, on another port of described threeway, connect oil pipeline, at described threeway and oil pipeline or connect on the housing of valve of petroleum pipeline and be provided with opening, on opening, be connected with the sample valve of the inside opening structure that can close automatically.

The valve of inwardly opening and can closing automatically has in the prior art, and the described sample valve that is adopted in the utility model can be such, it includes valve body, it is a cylindrical shell, has the stairstepping through hole in it, in valve body, be provided with a spool, it is plugged on the valve seat that forms on the little inn of described trapezoidal hole one end, the valve body of one end of the macropore of described ladder hole is connected with described opening, in described valve body, be provided with elastic component in addition, the one end bearing is on the valve body or on the tube wall of the petroleum pipeline that is connected with valve body, and its other end is against on the spool, makes between spool and the valve seat to seal.Link up and described spool is exposed in the hole with extraneous to aperture at the stairstepping through hole that is provided with on the valve body, in the time will getting crude oil sample, have only and have top and sampler containing cavity with special, the elastic force of the described elastic component of interior mutually resistance in the hole of linking up with the external world on the top insertion valve body is compressed spool, crude oil in the oil pipeline just can lean on oil pressure jet flow in it in the containing cavity of sampler finishing sampling operation, and do not have the special tool just can't be by sample valve place stolen.Can also establish an end cap in the place, aperture with hole external world's communication on valve body, this end cap can be locked on the valve body by locked instrument, like this, one can reduce dust enters valve body and spool and valve seat is caused wearing and tearing, again can make the oil stealer can't directly contact the spool of sample valve, make the anti-theft effect at sample valve place better.

This production wellhead is canceled the gate of a plurality of helixseal structures of original well head, and make this place become integrative-structure, make the oil stealer have no way of dismantling and unscrewing, but still to use dismountable structure that is tightly connected inevitably at device for adjusting deviation and the blowout hookup above it, because between blowout prevention box and the swabs bar be a packing box seal structure, the wearing and tearing of filler and therefore usually will carrying out to the replacing of blowout prevention box packing filling, device for adjusting deviation is because the characteristics of its use also often will adopt the releasable connection structure, for the removable structure that is tightly connected that makes this place has antitheft effect, can establish a locked instrument.The described removable structure that is tightly connected can be the structure that is tightly connected that is spirally connected, at this moment, can on the outer wall of described blowout hookup, be convexly equipped with snap close piece integratedly, detaining an end of establishing a padlock on the described snap close piece and/or on the device for adjusting deviation, the other end of described padlock can be locked on the still life, as described in locking on the conveyance conduit.Like this, if do not open this locked instrument, just can't be with blowout hookup and/or device for adjusting deviation and conveyance conduit turn.

The antitheft production wellhead that the utility model provides makes the oil stealer have no way of dismantling and unscrewing by the unnecessary syndeton in the existing well mouth structure being become integrative-structure, the releasable connection structure that must establish for ordinary production and sample tap etc. are located, but used locked instrument and just can't open and the device of automatic blocking can make the oil stealer can not steal crude oil easily under the prerequisite that does not influence production without specialist tools.

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 shows the structural representation of production wellhead of the prior art

Fig. 2 shows the structural representation of production wellhead of the present utility model

Fig. 3 shows the sectional structure schematic diagram of sample valve used on production wellhead shown in Figure 1

Fig. 4 shows and a kind of blowout hookup is locked to structure on the oil pipeline, and it is the A-A sectional structure schematic diagram of Fig. 2

Fig. 5 shows and another kind of blowout hookup is locked to structural representation on the oil pipeline

Embodiment:

As shown in Figure 2, the upper end port of threeway 21 device for adjusting deviation 22 that is tightly connected that is spirally connected, the lower end port is established screw thread 23 and is used for being tightly connected with oil-out, and the oil pipeline 24 that is tightly connected is spirally connected on the port to the right.In the manufacturing of threeway 21, can select one section seamless steel pipe, be processed as tubing thread in its lower end, the device for adjusting deviation that is spirally connected in the top, perforate is spirally connected and also can welds oil pipeline on the tube wall therebetween.Be spirally connected in the upper end of device for adjusting deviation 22 blowout hookup 25 is installed, welding is convexly equipped with snap close piece 251 on the outer wall of blowout hookup 25, establishes a buckle structure on oil pipeline 24, and it can have two kinds of structures.

One of them is as Fig. 2, shown in 4, it is a hydraulic lock 26, the top of hydraulic lock 26 is a shaft-like hammerlock, on it is axial, be provided with a slotted hole as locked groove 261, snap close piece 251 on the outer wall of blowout hookup 25 buckles on locked groove 261, be used for hydraulic lock is buckled snap close piece 251 on the outer wall of blowout hookup 25, the gabarit of device for adjusting deviation 22 also can be made double wedge, double wedge also is located in the locked groove 261, the bottom of hydraulic lock 26 is the lock bridge 262 of a bifurcation structure, its lower end is extended down to the both sides of oil pipeline, on the tube wall of oil pipeline and corresponding section, position lock bridge, offer two relative holes, an affixed hydraulic lock piston rod 263 in the oil pipeline between two holes is established hole and oil pipeline and is linked up on its casing wall.Both sides in hydraulic lock piston rod 263 are respectively equipped with a hydraulic lock piston 264, and itself and piston rod inner wall sealing are as can be by the inner wall sealing of piston packing ring 265 with hydraulic lock piston rod 263.Being provided with lock bridge pit 266 in the position of the corresponding hydraulic lock piston 264 of lock bridge 262 is complementary with hydraulic lock piston 264.

The operating principle of this hydraulic lock 26 is: locked groove 261 that will be wherein buckles on the snap close piece on the blowout prevention box 25 251, and meanwhile, hydraulic lock piston 264 can reciprocatingly be located in the hydraulic lock piston rod 263 and be relative with lock bridge pit 266 on the lock bridge 262.When in the oil pipeline crude oil flow being arranged, oil pressure in the tube road outwards moves hydraulic lock piston 264, enter in the lock bridge pit and be pressed on the bottom surface in lock bridge hole, at this moment, hydraulic lock 26 is locked, to being fixed in the fastening of the snap close piece on the blowout prevention outer box wall, stoped the rotation of blowout prevention box by hammerlock.As long as in the oil pipeline oil pressure is arranged, just can't dismantle or unscrew blowout prevention box 25.Can prevent stolen thus effectively because of dismantling or unscrewing the blowout prevention box.In the time will keeping in repair oil well and change packing filling in the blowout prevention box, the oil transportation of well head should suspend, ducted oil pressure is unstowed just can tear the blowout prevention box open, otherwise oil can spray, only do not wasted crude oil, maintenance work also can't be carried out, and oil pressure is unstowed, and hydraulic lock 26 is also just untied naturally, hydraulic lock piston 264 is released lock bridge pits 266, will lock by just taking off on the snap close piece 251 and can screw off the blowout prevention box freely.In order after release, easily the hydraulic lock piston to be released the lock bridge pit, can be provided with through hole 269 in the bottom of lock bridge pit, after release, by the through hole in the outside piston is released the lock bridge pit by instruments such as screwdrivers

Hydraulic lock piston rod in the described hydraulic lock also can be provided with by establish the hole on a side pipe wall on the position of corresponding any lock bridge bifurcated of oil pipeline, similarly, in this piston rod, establish the hydraulic lock piston, link up in piston rod and the oil pipeline, on the corresponding hydraulic lock position of piston of lock bridge of this side, establish the lock bridge pit.

Another kind of buckle structure as shown in Figure 5, it is a mechanical lock, hammerlock structure wherein is identical with the hammerlock of above-mentioned hydraulic lock 26, just the lower end of its lock bridge 262 ' is extended down to the downside of oil pipeline, the hole is established in lower end at lock bridge 262 ', wears lock pin 268 in the hole, and an end of lock pin 268 is established flange 268a and is resisted against on the lock bridge 262 ', its other end passes the hole on the opposite side lock bridge, and a tapered end 267 is established in the external part perforate of lock pin.Lock tapered end 267, can pin the blowout prevention box equally and make it and to rotate.

Described hydraulic lock or mechanical lock can lock together blowout hookup, device for adjusting deviation and oil pipeline simultaneously: the slotted hole on the hammerlock of top has fastened blowout hookup and device for adjusting deviation can not rotate, on the lock bridge of the bifurcated of bottom and hydraulic lock or mechanical lock the oil pipeline that this lock is fixing, in addition, if make non-circular shape with the gabarit of the oil pipeline of lock bridge corresponding position, lock bridge also can stop the rotation of oil pipeline simultaneously effectively.

On oil pipeline 3, be provided with the effectively sample valve 27 of guard against theft oil, sample valve 27 as shown in Figure 3, spherical valve core 272 is established in the welding of a port of valve body 271 and the opening on the pipeline 24 in the valve body 271, spool also can be a cone etc.Spool 272 places on the hole 271b of the valve seat 271a in the valve body, is provided with spring 273 in the valve body, and the one end is fixed on the valve body, and the other end is fixed on the spool 272.When not taking a sample, spool is pressed against on the valve seat under the effect of spring, sealing sampling valve opening 271b.When using sampler to compress spool resistance spring force, just can take out crude oil.

Claims

1, a kind of antitheft production wellhead, it is characterized in that: include the threeway that has the well head connecting elements, in described threeway up and down in two ports, under port on connect described well head connecting elements, connect device for adjusting deviation on last port, the blowout hookup that removably is tightly connected on described device for adjusting deviation connects oil pipeline on another port of described threeway, on described oil pipeline, be provided with opening, on opening, be connected with the sample valve of the inside opening structure that can close automatically; On described blowout hookup, be provided with locked instrument.

2, antitheft production wellhead according to claim 1, it is characterized in that: described sample valve includes valve body, it is a cylindrical shell, has the stairstepping through hole in it, in valve body, be provided with a spool, it is plugged on the valve seat that forms on the little inn of described trapezoidal hole one end, the valve body of one end of the macropore of described ladder hole is connected with described opening, in described valve body, be provided with elastic component in addition, the one end bearing is on the valve body or on the tube wall of the petroleum pipeline that is connected with valve body, its other end is against on the spool, makes between spool and the valve seat to seal.

3, antitheft production wellhead according to claim 1 is characterized in that: the place, aperture with hole external world's communication on described valve body establishes an end cap.

4, antitheft production wellhead according to claim 3 is characterized in that: described end cap is locked on described valve body or the described pipeline by locked instrument.

5, antitheft production wellhead according to claim 1, it is characterized in that: the described removable structure that is tightly connected between described blowout hookup and the device for adjusting deviation is the structure that is tightly connected that is spirally connected, on the outer wall of described blowout hookup, be convexly equipped with snap close piece integratedly, button is established an end of padlock on described snap close piece, and the other end of described padlock locks on the still life.

6, antitheft production wellhead according to claim 5 is characterized in that: described still life is described conveyance conduit.

7, antitheft production wellhead according to claim 6, it is characterized in that: described padlock is a hydraulic lock, the top of described hydraulic lock is a shaft-like hammerlock, on it is axial, be provided with a slotted hole as locked groove, described snap close piece on the outer wall of described blowout hookup buckles in described locked groove, its underpart is the lock bridge of a bifurcation structure, on the tube wall of described oil pipeline and corresponding section, position described lock bridge, offer a hole or two relative holes, an affixed hydraulic lock piston rod in the described oil pipeline between described two holes or a hole correspondence is established hole and described oil pipeline and is linked up on its casing wall; Both sides in described hydraulic lock piston rod respectively or a side be provided with a hydraulic lock piston, the inner wall sealing of itself and described hydraulic lock piston rod; Be provided with the lock bridge pit at the corresponding hydraulic lock position of piston place of described lock bridge and described hydraulic lock piston is complementary.

8, antitheft production wellhead according to claim 7, it is characterized in that: the bottom at described lock bridge pit is provided with through hole.

9, antitheft production wellhead according to claim 6, it is characterized in that: described padlock is a mechanical lock, its top is a shaft hammerlock, on it is axial, be provided with a slotted hole as locked groove, described snap close piece on the outer wall of described blowout hookup buckles in described locked groove, its underpart is the lock bridge of a bifurcation structure, the lower end of described lock bridge is extended down to the downside of oil pipeline, the hole is established in lower end at described lock bridge, wear lock pin in the described hole, one end of described lock pin is established flange and is resisted against on the described lock bridge, and its other end passes the hole on the described lock bridge of opposite side, and a tapered end is established in the external part perforate of described lock pin.

10, according to claim 7 or 8 described antitheft production wellheads, it is characterized in that: the gabarit of described device for adjusting deviation is made double wedge, and this double wedge also is located in the described locked groove.