CN201326408Y

CN201326408Y - 2*** inch gas well downhole choke

Info

Publication number: CN201326408Y
Application number: CNU2008201492446U
Authority: CN
Inventors: 李俊福; 张传超; 吴田中; 张海军; 李博
Original assignee: PUYANG TAIHE TESTING TECHNOLOGY Co Ltd
Current assignee: PUYANG TAIHE TESTING TECHNOLOGY Co Ltd
Priority date: 2008-09-17
Filing date: 2008-09-17
Publication date: 2009-10-14
Anticipated expiration: 2018-09-17

Abstract

The utility model relates to a 27/8 inch gas well downhole choke belonging to an oil and gas well throttling and pressure reducing process device, which overcomes the defects in other technologies. The 27/8 inch gas well downhole choke is formed by connecting an air nozzle cap, a sealing ring I, an air nozzle, an attachment cap, a jamming cap, a locking sleeve, a locking ring, a spare cap, a sealing ring II, a distance ring, a rubber tube, a wedge body, a slip, a lower core bar, a liner bushing, a slip carrier, an unsetting shear pin, a sealing ring III, a friction block, a spring plate, a righting body, a protecting cap, an unsetting sleeve, an upper core bar, a lost head and a setting shear pin; and the utility model can ensure that the choke for realizing the oil extracting gas well throttling and pressure reducing process achieves the purposes of firm setting, high differential pressure resistance and reliable plugging releasing and easy plugging releasing; the choke is smoothly lifted up without setting when meeting resistance under the well; and during the borehole operation of the chock, the anchoring mechanism, the plugging releasing mechanism, the sealing mechanism and the locking mechanism are in the relative tension states under the action of the friction righting mechanism, and the anchoring mechanism of the choke cannot lead to a phenomenon of incorrect setting.

Description

2 7/ 8Inch natural gas well underground throttle device

One, technical field:

The utility model relates to a kind of petroleum and natural gas well expenditure and pressure process unit, and especially 2 ⁷/ ₈Inch natural gas well underground throttle device.

Two, background technology:

At present the oil exploitation natural gas well is produced the down-hole high pressure natural gas expenditure and pressure instrument that is used in the natural gas oil pipe the scaled high-pressure natural gas well of stratum output has: the one, and carry on the steel wire for logging and realize the restriction choke grappling, give up, annular space in the length of spring compressed sealing mechanism sealing production tube, carry out the expenditure and pressure of high-pressure gas well.The 2nd, the clock type motor carries out grappling, seals, gives up restriction choke, the clock type motor to the seat envelope of restriction choke be the rotating mechanical energy of clock motor is converted to rectilinear motion mechanical energy and realize restriction choke grappling, seal, give up.The 3rd, utilize high energy gas power conversion that special-purpose dropping feeder instrument produces the stick that ignites for mechanical movement realize to restriction choke grappling, seal, give up.The common issue with that the technology of present three kinds of seats envelope restriction choke exists is that the seat envelope realizes easily, salvages restriction choke and has the deblocking difficulty, puies forward restriction choke seat envelope at once on being hampered; The reason of deblocking difficulty is a not deblocking of sealing system.The reason of putting forward restriction choke seat envelope on being hampered is that the anchor mechanism design is unreasonable; Influence the smooth implementation of oil exploitation natural gas well expenditure and pressure technological measure.

Three, summary of the invention:

The purpose of this utility model provides and a kind ofly is applicable to that the strata pressure of gas exploitation course mesohigh gas well is very high, when producing natural gas well head pressure also high 2 ⁷/ ₈Inch natural gas well underground throttle device, it has solved the shortcoming that other technology exists, the purpose of this utility model be achieved in that it be by gas chew that cap, sealing ring, gas are chewed, attachment cap, and tight cap, lock tube, lock ring, be equipped with cap, sealing ring, spacer ring, packing element, carve body, slips, down core bar, lining, slips holder, deblocking shear pin, sealing ring, brake pad, latch plate, centralizer body, helmet, separate big envelope, go up core bar, give up head and a seat envelope shear pin be formed by connecting; Gas is chewed cap upper end box and is linked to each other with following core bar lower end pin thread; Gas is chewed in the following stomidium that is set in down core bar, and there is sealing ring the centre; The attachment cap box is connected with following core bar stage casing pin thread, and tight cap box is connected with attachment cap with pin thread under the lock tube and is connected; On the lock tube pin thread be equipped with cap and be connected, in lock ring edge and the lock tube; 2 sealing rings and other 2 sealing rings are loaded on down the upper-lower seal groove of core bar respectively; Spacer ring and packing element are enclosed within on the lining; 3 different trapezium structures in slips two ends are connected on the elastic claw of lining and with the following pin thread of centralizer body with the dovetail groove adapter sleeve of carving body and slips holder; 3 brake pads and 6 latch plate combination Inlaid in three grooves of centralizer body, buckle with helmet interior and centralizer body on pin thread be connected and fixed; Deblocking is sleeved in card Philippe Vatuone and the lining elastic claw and with 4 deblocking shear pins that are contained in the slips holder and fixes; Last core bar is connected with the head of giving up; 4 seat envelope shear pins are contained on 4 shear pin holes of the head of giving up.

Operating principle: restriction choke is connected on the instrument cab steel wire for logging, is contained in the blowout prevention box, be lowered to the design throttling degree of depth in the gas well oil pipe.Carry on the instrument cab winch is quick, centralizer body friction piece and anchoring system produce relative motion in promoting the mandrel system, and anchor mechanism is anchored on the tube inner wall, and secondly sealing mechanism seals the sky that changes of restriction choke and oil pipe generation; Locking mechanism locking anchor mechanism and sealing mechanism; Draw steel wire for logging in the continuation, the shear pin on the pull head is cut off, and realizes giving up, and the restriction choke seat is encapsulated in the design well depth, trips out steel wire for logging and weight linear meter, finishes the seat envelope process of gas well restriction choke.

During deblocking gas well restriction choke, on fishing socket connection and steel wire for logging, be loaded in the blowout prevention box, down in the gas well oil pipe, when fishing socket is transferred the degree of depth to restriction choke, fishing socket relies on deadweight that the deblocking of guide head guiding restriction choke is covered in the work together, continue pressurization, the deblocking of restriction choke covers into and drags in the pawl, and the barb that fishing socket drags for pawl is caught the barb of separating big envelope of restriction choke, on carry steel wire for logging 150-200Kg, finish the restriction choke deblocking.

The problem that exists in the restriction choke job execution process at oil exploitation natural gas well expenditure and pressure technology and the state of the art of dealing with problems at present; The utility model can guarantee to realize that the restriction choke of oil exploitation natural gas well expenditure and pressure technology realizes that seat secures and lean on that withstand voltage difference is high, the reliable easily deblocking of deblocking; On going into the well and be hampered steadily, restriction choke puies forward not seat envelope.Anchor mechanism during well operations under the restriction choke, separate sealing mechanism, sealing mechanism and locking mechanism be in the relative tension state under the effect of friction righting mechanism, the anchor mechanism of restriction choke can not produce a mistake seat phenomenon.Under the restriction choke during well operations as long as at the uniform velocity go into the well, the instrument winch was carried on steadily at a slow speed when restriction choke was hampered, restriction choke can the seat envelope; Solved original restriction choke and gone into the well that to carry on being hampered be the shortcoming of anchor block envelope.The sealing mechanism design pulling force sealing mechanism of restriction choke to sealing mechanism locking design step lock structure, so just improves the grappling performance of anchor mechanism, sealing mechanism and seals withstand voltage poor performance parameter.The deblocking mechanism design of restriction choke unique grappling deblocking, sealing deblocking link gear, big envelope is separated in pulling, anchor mechanism, sealing mechanism interlock deblocking have solved original restriction choke anchor mechanism deblocking and the sealing mechanism shortcoming of deblocking not.

Four, description of drawings:

Fig. 1 is 2 ⁷/ ₈The structural representation of inch natural gas well underground throttle device, among the figure 1, gas chews that cap 2, sealing ring 3, gas chew 4, attachment cap 5, and tight cap 6, lock tube 7, lock ring 8, be equipped with cap 9, sealing ring 10, spacer ring 11, packing element 12, carve body 13, slips 14, down core bar 15, lining 16, slips holder 17, deblocking shear pin 18, sealing ring 19, brake pad 20, latch plate 21, centralizer body 22, helmet 23, separate big envelope 24, go up core bar 25, give up 26, seat envelope shear pin

Five, the specific embodiment:

In Fig. 1, gas is chewed cap 1 upper end box and is linked to each other with following core bar 14 lower end pin threads; Gas is chewed 3 and is set in down in the following stomidium of core bar 14, and there is sealing ring 2 centre; Attachment cap 4 boxes are connected with following core bar 14 stage casing pin threads, and tight cap 5 boxes are connected with attachment cap 4 with 6 times pin threads of lock tube and are connected; On the lock tube 5 pin thread be equipped with cap 8 and be connected, in lock ring 7 edges and the lock tube 6; 2 sealing rings 9 and other 2 sealing rings 18 are loaded on down the upper-lower seal groove of core bar 14 respectively; Spacer ring 10 and packing element 11 are enclosed within on the lining 15; 3 different trapezium structures in slips 13 two ends are connected on the elastic claw of lining 15 and with the following pin thread of centralizer body 21 with the dovetail groove adapter sleeve of carving body 12 and slips holder 16; 3 brake pads 19 and 6 latch plate 20 combination Inlaid in 21 3 grooves of centralizer body, buckle with helmet 22 interior and centralizer body 21 on pin thread be connected and fixed; Separate big envelope 23 and be contained in the slips holder 16 and in lining 15 elastic claws, fixing with 4 the deblocking shear pins 17 that are contained in slips holder 16; Last core bar 24 25 is connected with giving up; 4 seats envelope shear pin 26 is contained on 25 4 the shear pin holes of giving up.

Claims

1,2 ⁷/ ₈Inch natural gas well underground throttle device, it is to chew cap (1) by gas, sealing ring (2), gas is chewed (3), attachment cap (4), and tight cap (5), lock tube (6), lock ring (7), be equipped with cap (8), sealing ring (9), spacer ring (10), packing element (11), carve body (12), slips (13), following core bar (14), lining (15), slips holder (16), deblocking shear pin (17), sealing ring (18), brake pad (19), latch plate (20), centralizer body (21), helmet (22), separate big envelope (23), last core bar (24), a give up head (25) and an envelope shear pin (26) is formed by connecting; It is characterized in that: gas is chewed cap (1) upper end box and is linked to each other with following core bar (14) lower end pin thread; Gas is chewed in the following stomidium that (3) be set in down core bar (14), and there is sealing ring (2) centre; Attachment cap (4) box is connected with following core bar (14) stage casing pin thread, and tight cap (5) box is connected with attachment cap (4) with lock tube (6) time pin thread and is connected; Lock tube (5) is gone up pin thread and is equipped with cap (8) and is connected, lock ring (7) inlay and lock tube (6) in; 2 sealing rings (9) and other 2 sealing rings (18) are loaded on down the upper-lower seal groove of core bar (14) respectively; Spacer ring (10) and packing element (11) are enclosed within on the lining (15).

2, according to claim 12 ⁷/ ₈Inch natural gas well underground throttle device is characterized in that: the different trapezium structures in 3 slips (13) two ends are connected on the elastic claw of lining (15) and with the following pin thread of centralizer body (21) with the dovetail groove adapter sleeve of carving body (12) and slips holder (16).

3, according to claim 12 ⁷/ ₈Inch natural gas well underground throttle device is characterized in that: 3 brake pads (19) and 6 latch plates (20) combination are set in (21) three grooves of centralizer body with helmet (22) interior and buckle and the last pin thread of centralizer body (21) is connected and fixed.

4, according to claim 12 ⁷/ ₈Inch natural gas well underground throttle device is characterized in that: separate big envelope (23) and be contained in the slips holder (16) and in lining (15) elastic claw and with 4 the deblocking shear pins (17) that are contained in slips holder (16) and fix.

5, according to claim 12 ⁷/ ₈Inch natural gas well underground throttle device is characterized in that: go up core bar (24) and be connected with the head (25) of giving up; 4 seat envelope shear pins (26) are contained on 4 shear pin holes of the head (25) of giving up.