CN2551759Y

CN2551759Y - Gate jet preventing device for drilling well

Info

Publication number: CN2551759Y
Application number: CN 02232891
Authority: CN
Inventors: 许宏奇; 赵荣军; 孟宪宁; 苏尚文
Original assignee: RONGSHENG MACHINERY MANUFACTURE Ltd OF HUABEI OILFIELD
Current assignee: RONGSHENG MACHINERY MANUFACTURE Ltd OF HUABEI OILFIELD
Priority date: 2002-05-23
Filing date: 2002-05-23
Publication date: 2003-05-21
Anticipated expiration: 2012-05-23

Abstract

The utility model relates to a flashboard blowout preventer used for a well drilling, relating to a control device used for a petroleum well drilling, which belongs to an appurtenance used for the petroleum well drilling. The board blowout preventer mainly solves the problems that the sealing is not reliable and the operation is not convenient, the weight of the flashboard blowout preventer is lighter, and the bearing capacity is bigger. The flashboard blowout preventer consists mainly of a casing, a flashboard, a side gate, liquid cylinders, and cylinder covers. The utility model is characterized in that the cross section of the flashboard cavity in the casing is of a long-round shape, an arc sealing strip and a front sealing strip are arranged on the flashboard, the end parts of the curved sealing strip and the front sealing strip are overlapped, through holes are arranged in the open and the close piston rods arranged in the two cylinders, an oil valve is arranged in the hydraulic oil channel in the cylinder cover, a sealing rack is arranged between the side gate and the casing, a through groove is arranged on the sealing rack, three seal rings are arranged on the sealing rack, the hydraulic pressure is utilized to open or close the side gate, the operation is convenient, the flashboard blowout preventer is mainly used for the petroleum well drilling project.

Description

A kind of drilling well ram preventer

Technical field

The utility model relates to a kind of oil drilling control appliance, belongs to the oil drilling fixture.

Background technology

If in drilling process when running into high-pressure oil-gas layer, just well kick or gas blowout accident may take place.Must use preventer to seal well head, to guarantee the safety of drill-well operation personnel and equipment.At present, the preventer that uses at situ of drilling well has various ways, what wherein ram preventer was used is more, but there are some imperfection parts technically in this preventer, as the sealing between (1) side door and housing is to adopt the material filling type hermetically-sealed construction, and coupling bolt must have enough pretightning forces, and this sealing is unreliable, often reveal at the sealing position, influences its result of use.(2) flashboard chamber cross section is a rectangle in the housing, concentrates at place, right angle stress, influences its supporting capacity, in order to satisfy demands for bearing capacity, must increase the wall thickness of housing, has also just increased the overall weight of preventer.(3) the product side door that has adopts hinge to connect, by manually opening side door, when side door weight is big, operation is effort relatively, (4), be same operation owing to open side door and close flashboard, and link though the product that has is to open or close side door by hydraulic pressure, in order to increase whole rigidity, overall dimensions and weight have all increased.

Technology contents

The purpose of this utility model provides a kind of drilling well ram preventer reliable, that weight ratio is less, supporting capacity is bigger, easy to operate that seals.

Technical solution of the present utility model is to realize like this, a kind of drilling well ram preventer, by housing, flashboard, side door, fluid cylinder and cylinder cap constitute, weather strip is installed on the flashboard, 2 shoe brake plates are installed in respectively in the flashboard chamber of housing both sides, 2 side doors are installed in housing two surveys by bolt, fluid cylinder is installed between side door and the cylinder cap, flashboard axis two ends connect mutually with flashboard, the other end connects mutually with piston, and piston is installed in the fluid cylinder, and lock shaft connects with flashboard axis mutually by screw thread, its special character is, (1) the flashboard chamber cross section in the housing is a Long Circle, and (2) have the top seal groove of arc on flashboard, have preceding seal groove at the flashboard front end face, the two seals groove is connected in the flashboard side, and weather strip is housed in seal groove.

In above-mentioned technical solution, its special character is that also (1) two cylinder barrel places the fluid cylinder both sides, is installed between cylinder cap and the side door.Be separately installed with in (2) two cylinder barrels and open piston rod and closure piston bar, an end of opening piston rod and closure piston bar is installed on the housing by screw thread, opens in piston rod and the closure piston bar to have through hole, and is connected with the interior hydraulic oil channel of housing.(3) in the hydraulic oil channel in cylinder cap fuel tap is installed.

In above-mentioned technical solution, its special character also is, between side door and the housing sealing ring is installed, and sealing ring is made of sealing frame and 3 sealing rings mounted thereto, has connectivity slot on the sealing frame.

Technical solution of the present utility model can also realize like this, a kind of drilling well ram preventer, by housing, flashboard, side door, fluid cylinder and cylinder cap constitute, weather strip is installed on the flashboard, 2 shoe brake plates are installed in respectively in the flashboard chamber of housing both sides, 2 side doors are installed in housing two surveys by bolt, fluid cylinder is installed between side door and the cylinder cap, and flashboard axis one end connects mutually with flashboard, and the other end connects mutually with piston, piston is installed in the fluid cylinder, lock shaft connects with flashboard axis mutually by screw thread, and its special character is, between side door and the housing sealing ring is installed, sealing ring is made of sealing frame and 3 sealing rings mounted thereto, has connectivity slot on the sealing frame.

The utility model has the advantages that: (1) because the flashboard chamber cross section in the housing adopts Long Circle, the stress that can reduce on the housing is concentrated, and improves the supporting capacity of housing.(2) opening and closing because of side door are to rely on hydraulic system, and are easy to operate, make maintenance work easy, increase work efficiency.(3) between housing and side door, adopt sealing frame and, make that sealing is more reliable, can reduce pretightning force greatly coupling bolt from seal structure.(4) application of fuel tap switch can reduce the distance that side door is opened, and has also reduced the degree that overhangs after side door is opened, and can make the structure of preventer more compact like this, and is also more reliable.

Description of drawings

Fig. 1 is the structural front view of partly cuing open of the present utility model.

Fig. 2 is the structure vertical view that partly cuts open of the present utility model.

Fig. 3 is an A-A sectional drawing of the present utility model.

Fig. 4 is the side door sealing frame sectional drawing in the utility model.

Fig. 5 is the side door sealing frame left view in the utility model.

Fig. 6 is the stereogram of flashboard in the utility model.

The specific embodiment

It is Long Circle flashboard chamber that both sides in housing 10 have cross section, or four jiaos be the rectangle flashboard chamber of circular arc, and the flashboard 11 that two cross sections are respective shapes is installed in respectively in the flashboard chamber, the left and right sides.Has circular arc top seal groove at flashboard 11 upper surfaces, middle part at flashboard 11 front end faces has preceding seal groove, top seal groove and preceding seal groove are connected, top sealing 38 is housed in the seal groove of top, sealing 39 before being equipped with in preceding seal groove, the two ends of top sealing 38 and preceding sealing 39 overlap mutually.Side door 13 centers have the through hole that flashboard axis 14 is installed, and both sides have piston rod through hole and hydraulic oil channel, and two guide pegs 9 are installed on the side door 13, and flashboard 11 is installed on two guide pegs 9.Side at side door 13 has seal groove, about two side doors 13 be fixedly mounted on the both sides of housing 10 respectively respectively by 4 bolts 28, between side door 13 and the housing 10 sealing ring 12 is installed, sealing ring 12 is equipped with

sealing ring

33,35,36 by sealing frame 34 and constitutes, be installed in the seal groove of side door 13, utilize the elasticity of sealing ring 36, make sealing ring 33 set up initial sealing, so sealing ring 36 also can replace with annular wavy spring leaf.Have 4 connectivity slots 37 on the sealing frame 34, make highly pressurised liquid promote sealing frame 34 better, compress sealing ring 33, realize more reliable sealing.Also have the T-shaped hydraulic oil channel in 2 roads in the housing 10, have 2 hydraulic oil channel mouths on housing 10, be separately installed with hydraulic oil base 26, between oil pipe seat 26 and the housing 10 sealing ring 27 is housed, they are bound up by screw 25.Opening piston rod 21 and closure piston bar 24 is installed on the housing 10 by the screw thread of one end respectively, between they and side door 13, the housing 10

sealing ring

22,23 is housed respectively, have hydraulic oil channel in unlatching piston rod 21 and the closure piston bar 24, the T-shaped hydraulic channels in this passage and the housing 10 are connected.

Fluid cylinder

16 and 2 cylinder barrels 20 are installed between side door 13 and cylinder cap 1, between fluid cylinder 16 and the cylinder cap 1 sealing ring 4 is housed, between fluid cylinder 16 and the side door 13 sealing ring 7 is housed, between cylinder barrel 20 and the cylinder cap 1 sealing ring 19 is housed, by 8 bolts 6 and nut 3 side door 13 and cylinder cap 1 are bound up, piston 15 is housed in

fluid cylinder

16,2 road sealing rings 5 are installed between piston 15 and the fluid cylinder 16, piston 15 and flashboard axis 14 are bound up, be made into an integral body, flashboard axis 14 passes side door 13, its right-hand member and flashboard 11 are bound up by hook, between flashboard axis 14 and the side door 13 combined seal ring 8 are installed, and are equipped with in a cylinder barrel and open piston rod 21, closure piston bar 24 is housed in another cylinder barrel, opens piston rod 21, sealing ring 18 is housed between closure piston bar 24 and the cylinder barrel.Has hydraulic channel in the cylinder cap 1, fuel tap is installed in hydraulic channel, fuel tap is installed together by cock 29, coupling sleeve 30 and spool 32 and constitutes, cock 29 is installed on the cylinder cap 1 by screw thread, between coupling sleeve 30 and the cylinder cap 1 sealing ring 31 is housed, by screwing or unclamping cock 29, can make the hydraulic oil channel in the housing 10 close or open.Have step on the lock shaft 17, the right-hand member of lock shaft 17 extend in the flashboard axis 14, is bound up by screw thread and flashboard axis 14, between lock shaft 17 and the cylinder cap 1 sealing ring 2 is installed.This ram preventer bilateral symmetry has left and right sides side door, fluid cylinder, cylinder sleeve, cylinder cap, lock shaft etc. respectively.

This preventer is installed on the well head that carries out wellbore construction, hydraulic line is connected on the oil pipe seat 26.In drilling process, in the time of when blowout takes place, need sealing well head, open the valve on the hydraulic line, high-pressure medium is entered in the fluid cylinder 16, promote piston 15 and move, piston 15 promotes flashboard by flashboard axis 14 and moves to the well head center, well head is sealed, withdraw from lock shaft 17 this moment in flashboard axis 14, make the step on the lock shaft 17 hold out against cylinder cap 1, can be with flashboard 11 lockings.If in the time of will opening well head, earlier with lock shaft 17 precession flashboard axis 14, make high-pressure medium promote piston 15 again and move round about, can open well head.If when needing maintenance flashboard 11, at first fixedly the screw 28 of side door is laid down, cock on the fuel tap 29 is screwed, to block towards the oil duct in the fluid cylinder 16, high-pressure medium is entered in the cylinder barrel 20 by the hydraulic oil channel of opening in the piston rod 21, promote cylinder cap 1 and outwards move, cylinder cap 1 drives side door 13 by bolt 3 and outwards moves together, flashboard 11 is pulled out in the flashboard chamber, can overhaul or change.After maintenance finishes, high-pressure medium is entered in the cylinder barrel by the hydraulic oil channel in the closure piston bar 24, promote side door 13 and move inward, side door 13 drives cylinder cap 1 by bolt 3 and moves inward together, flashboard 11 is sent in the flashboard chamber, side door 13 is fixed on the housing by bolt 28.

Claims

1. drilling well ram preventer, by housing (10), flashboard (11), side door (13), fluid cylinder (16) and cylinder cap (1) constitute, flashboard is equipped with weather strip (38 on (11), 39), 2 shoe brake plates (11) are installed in respectively in the flashboard chamber of housing (10) both sides, 2 side doors (13) are installed in housing (10) both sides by bolt (28), fluid cylinder (16) is installed between side door (13) and the cylinder cap (1), flashboard axis (14) one ends connect mutually with flashboard (11), the other end connects mutually with piston (15), piston (15) is installed in the fluid cylinder (16), lock shaft (17) connects with flashboard axis (14) mutually by screw thread, it is characterized in that:

1. the flashboard chamber cross section in the housing (10) is a Long Circle;

2. have the arched top seal groove on flashboard (11), have preceding seal groove at the flashboard front end face, the two seals groove is connected in flashboard (11) side, and weather strip (38,39) is housed in seal groove.

2. a kind of drilling well ram preventer according to claim 1 is characterized in that:

1. two cylinder barrels (20) place fluid cylinder (16) both sides, are installed between cylinder cap (1) and the side door (13);

2. be separately installed with in two cylinder barrels (20) and open piston rod (21) and closure piston bar (24), an end of opening piston rod (21) and closure piston bar (24) is installed on the housing (10) by screw thread, open in piston rod (21) and the closure piston bar (24) and have through hole, and and the interior hydraulic oil channel of housing (10) be connected;

3. in the hydraulic oil channel in cylinder cap (1) fuel tap is installed.

3. a kind of drilling well ram preventer according to claim 1 and 2, it is characterized in that: between side door (13) and the housing (10) sealing ring (12) is installed, sealing ring (12) is made of sealing frame (34) and 3 sealing rings (33,35,36) mounted thereto, has connectivity slot (37) on the sealing frame (34).

4. drilling well ram preventer, by housing (10), flashboard (11), side door (13), fluid cylinder (16) and cylinder cap (1) constitute, flashboard is equipped with weather strip (38 on (11), 39), 2 shoe brake plates (11) are installed in respectively in the flashboard chamber of housing (10) both sides, 2 side doors (13) are installed in housing (10) two by bolt (28) and survey, fluid cylinder (16) is installed between side door (13) and the cylinder cap (1), flashboard axis (14) one ends connect mutually with flashboard (11), the other end connects mutually with piston (15), piston (15) is installed in the fluid cylinder (16), lock shaft (17) connects with flashboard axis (14) mutually by screw thread, it is characterized in that, between side door (13) and the housing (10) sealing ring (12) is installed, sealing ring (12) is by sealing frame (34) and 3 sealing rings (33 mounted thereto, 35,36) constitute, have connectivity slot (37) on the sealing frame (34).