CN201344009Y - Controllable anti-theft well plugging device - Google Patents

Abstract

A controllable anti-theft well plugging device belongs to petroleum machinery. An upper connector and a central pull tube are assembled on a carrier; a upper cone, a slip, a lower cone, an outer central tube, a balancing piston, a sealed housing, a bearing and a connector are assembled outside the central pull tube in sequence; a pressure-bearing head, a sealed rubber tube, a spacing ring and a balancing cylinder are mounted outside the outer central tube in sequence; the outer central tube and the lower cone, the pressure-bearing head and the carrier, the balancing piston and the outer central tube as well as the connector and the central pull tube are in threaded connection; an assembled pressure relief piston, a secondary pressure spring, a spring seat and a valve head of a mandril are assembled on a valve body; and a main pressure spring is disposed between the valve body and the valve head. The controllable anti-theft well plugging device has novel and reasonable structure, the well plugging and releasing operation are simple and convenient, the well plugging efficiency is high, the anti-theft performance is strong, the well plugging effect is good, the service life is long, the device is safe and reliable, and the operation cost is low.

Description

Antitheft controllable type blowout preventer

Technical field

The utility model belongs to petroleum machinery, relates generally to the blowout preventer that uses in a kind of well mouth of oil well sleeve pipe.

Background technology

Traditional oil well head shut-in well device is to adopt elasticity bridging plug and cement bridging plug fabricated structure, during capping operation, earlier utilize the equipment brute force to be driven in the well head sleeve pipe elasticity bridging plug, the cement bridging plug is poured onto in the well head sleeve pipe solidifies again, finish the operation of oil well shut-in well.The position is higher because this shut-in well structure is shunt in a well in the well head sleeve pipe, the reason nearer apart from ground, it prevents that the stolen function of oil is poor, especially in recent years the more generation of the stolen case of crude oil, cause the tremendous economic loss to country, theftproof performance becomes one of current well head shut-in well back essential condition.Simultaneously, above-mentioned tradition shut-in well structure shut-in well complex process, shut-in well cost height, the shut-in well weak effect, the shut-in well life-span is short, and shut-in well efficient is low, and well head easily leaks, and causes environment pollution; When the secondary recovery oil, the deblocking well head need bore plug, well-flushing supervisor, deblocking difficulty not only, and gas blowout accident easily takes place.

Summary of the invention

The purpose of this utility model is exactly the problem that exists at above-mentioned prior art, design provides a kind of antitheft controllable type blowout preventer, reaches good, the shut-in well of shut-in well theftproof performance and the deblocking Job Operations is easy and convenient, it is effective to shunt in a well, long service life, cheap, the safe and reliable purpose of operating cost.

Basic design of the present utility model is, a kind of antitheft controllable type blowout preventer, on outside, carrier upper end, be equipped with top connection by screw thread, trombone slide upper end, center is outside by being threaded in the carrier hole, suit upper cone, slips and lower cone successively from top to bottom on the trombone slide upper outside of center, and the slips conical surface contacts cooperation with the upper/lower cone conical surface; Dog screw is installed on upper cone and the lower cone outside; Suit exterior central tube slidably on outside, trombone slide middle part, center, the exterior central tube upside is outside to be connected with lower cone downside inner hole thread, pressure bearing head, cartridge, spacer ring and balance cylinder block overlap successively from top to bottom and fit on the exterior central tube outside, pressure bearing head is outside to be connected with carrier bottom inner hole thread, and spacer ring is between upper and lower two cartridge opposing end surfaces; Equipped successively from top to bottom dummy piston, capsul, bearing and connector on trombone slide downside outside, center, dummy piston top is inserted between balance cylinder block and the exterior central tube, and be threaded with exterior central tube, be sealed and matched with center trombone slide and balance cylinder block, bearing is arranged in capsul and contains, and connector is threaded with the center trombone slide; Valve body is fitted on the connector by screw thread, and valve head is inserted in the valve body conical central hole, and the principal pressure spring is installed between valve body and valve head, and the upper and lower end face of principal pressure spring contacts cooperation with valve head respectively with valve body; In the valve head centre bore, contact equipped release piston, secondary stress spring, spring base from top to bottom successively; Push rod is installed on the center, release piston upper surface.

The utility model adopts the structure of slips location, cartridge shut-in well, the release of release piston, realized locking, sealing shut-in well and the release deblocking operation of this device in the well head sleeve pipe, had that structure design is new reasonable, shut-in well and unsealing operation simple and convenient, shut-in well efficient height, theftproof performance are strong, it is effective to shunt in a well, long service life, safe and reliable, characteristics that operating cost is cheap.

Description of drawings

Accompanying drawing is antitheft controllable type blowout preventer general structure schematic diagram.

Piece number among the figure:

1, top connection, 2, center trombone slide, 3, carrier, 4, upper cone, 5, slips, 6, lower cone, 7, pressure bearing head, 8, cartridge, 9, spacer ring, 10, exterior central tube, 11, balance cylinder block, 12, dummy piston, 13, capsul, 14, bearing, 15, connector, 16, valve body, 17, valve head, 18, principal pressure spring, 19, release piston, 20, secondary stress spring, 21, spring base, 22, push rod, 23, shop bolt.

The specific embodiment

Below in conjunction with accompanying drawing the utility model optimum implementation is described in detail.A kind of antitheft controllable type blowout preventer, on outside, carrier 3 upper end, be equipped with top connection 1 by screw thread, outside, center trombone slide 2 upper end is by being threaded in carrier 3 holes, suit upper cone 4, slips 5 and lower cone 6 successively from top to bottom on center trombone slide 2 upper outside, and slips 5 conical surfaces contact cooperation with upper/lower cone 4,6 conical surfaces; Dog screw 23 is installed on upper cone 4 and lower cone 6 outsides; Suit exterior central tube 10 slidably on outside, center trombone slide 2 middle part, exterior central tube 10 upsides are outside to be connected with lower cone 6 downside inner hole threads, pressure bearing head 7, cartridge 8, spacer ring 9 and balance cylinder block 11 overlap successively from top to bottom and fit on exterior central tube 10 outsides, pressure bearing head 7 outsides are connected with carrier 3 bottom inner hole threads, and spacer ring 9 is between upper and lower two cartridge 8 opposing end surfaces; Equipped successively from top to bottom dummy piston 12, capsul 13, bearing 14 and connector 15 on center trombone slide 2 downside outsides, dummy piston 12 tops are inserted between balance cylinder block 11 and the exterior central tube 10, and be threaded with exterior central tube 10, be sealed and matched with center trombone slide 2 and balance cylinder block 11, bearing 14 is arranged in capsul 13 and contains, and connector 15 is threaded with center trombone slide 2; Valve body 16 is fitted on the connector 15 by screw thread, and valve head 17 is inserted in valve body 16 conical central holes, and principal pressure spring 18 is installed between valve body 16 and valve head 17, and principal pressure spring 18 upper and lower end faces contact cooperation with valve head 17 with valve body 16 respectively; In valve head 17 centre bores, contact equipped release piston 19, secondary stress spring 20, spring base 21 from top to bottom successively; Push rod 22 is installed on the center, release piston 19 upper surface.

When capping operation uses, this device integral body is placed to be positioned at 3-8 rice depths, well head below in the well head sleeve pipe earlier, its valve body 16 and valve head 17 1 ends are positioned at the bottom.With special tool in top connection 1 centre bore is inserted in center trombone slide 2 upper end holes, and center of rotation trombone slide 2, make center trombone slide 2 in carrier 3 to above move axially, driving connector 15 moves synchronously, connector 15 promotes bearing 14, also drives lower cones 6 motion upward in the lump by capsul 13, dummy piston 12, balance cylinder block 11, exterior central tube 10, under lower cone 6 and upper cone 4 conical surface actings in conjunction, make slips 5 radial dilatation, this device is fixed on well head internal surface of sleeve pipe face, locate; Synchronously, balance cylinder block 11 and pressure bearing head 7 crush seal packing elements 8 radial dilatation make cartridge 8 external surfaces closely contact with well head internal surface of sleeve pipe face, finish capping operation.During the deblocking operation, the through rod instrument is injected in center trombone slide 2 holes, its instrument lower surface contacts with push rod 22 upper surfaces, and it is mobile downwards to promote push rod 22, drive the annular fluid course position that release piston 19 enters into valve body 16, after laying down down-hole high pressure, continuing to press down the through rod instrument makes the disengaging of valve head 17 conical surfaces touch with valve body 16 conical surface seated connections, open the fluid course discharge opeing, use special tool backward rotation center trombone slide 2 again, make slips 5 and cartridge 8 radial contraction returns, in the well head sleeve pipe, take out this device, finish the operation of well head deblocking.

Claims (1)

1, a kind of antitheft controllable type blowout preventer, it is characterized in that outside going up by the equipped top connection (1) of screw thread in carrier (3) upper end, center trombone slide (2) upper end is outside by being threaded in carrier (3) hole, suit upper cone (4), slips (5) and lower cone (6) successively from top to bottom on center trombone slide (2) upper outside, and slips (5) conical surface contacts cooperation with upper/lower cone (4), (6) conical surface; Dog screw (23) is installed on upper cone (4) and lower cone (6) outside; Suit exterior central tube (10) slidably on center trombone slide (2) outside, middle part, exterior central tube (10) upside is outside to be connected with lower cone (6) downside inner hole thread, pressure bearing head (7), cartridge (8), spacer ring (9) and balance cylinder block (11) overlap successively from top to bottom and fit on exterior central tube (10) outside, pressure bearing head (7) is outside to be connected with carrier (3) bottom inner hole thread, and spacer ring (9) is positioned between upper and lower two cartridge (8) opposing end surface; Equipped successively from top to bottom dummy piston (12), capsul (13), bearing (14) and connector (15) on center trombone slide (2) downside outside, dummy piston (12) top is inserted between balance cylinder block (11) and the exterior central tube (10), and be threaded with exterior central tube (10), be sealed and matched with center trombone slide (2) and balance cylinder block (11), bearing (14) is arranged in capsul (13) and contains, and connector (15) is threaded with center trombone slide (2); Valve body (16) is fitted on the connector (15) by screw thread, valve head (17) is inserted in valve body (16) conical central hole, principal pressure spring (18) is installed between valve body (16) and valve head (17), and the upper and lower end face of principal pressure spring (18) contacts cooperation with valve head (17) with valve body (16) respectively; In valve head (17) centre bore, contact equipped release piston (19), secondary stress spring (20), spring base (21) from top to bottom successively; Push rod (22) is installed on release piston (19) center, upper surface.

Images