CN2417285Y

CN2417285Y - Hydraulic and diameter changeable type stabilizer

Info

Publication number: CN2417285Y
Application number: CN 00200642
Authority: CN
Inventors: 季细星
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-01-18
Filing date: 2000-01-18
Publication date: 2001-01-31
Anticipated expiration: 2010-01-18

Abstract

The utility model relates to a hydraulic stabilizer with a changeable diameter. Four uniformly distributed wing blocks are assembled on a casing, and the wing blocks are fixed on wing block shims by screws; a mandrel is arranged in the casing, a spring and a sliding retainer ring are arranged on steps on the upper part of the mandrel, the lower end of a movable orifice bunts and presses the retainer ring; the upper part of the casing is connected with an upper joint with a cone buckle; the lateral surface of the casing is provided with a screw plug. When a pump is started, the wing blocks extend to predefined positions to perform the function of the stabilizer; when the pump is stopped, the wing blocks shrink, and an accident that a trip drilling tool is prevented and clamped can be avoided. In addition, the wing blocks can be replaced in situ, a new stabilizer does not need to be purchased, and the utility model which is economic enhances work efficiency.

Description

The hydraulic pressure tapered stabilizer

The utility model relates to a kind of hydraulic pressure tapered stabilizer, belongs to the oil/gas drilling engineering equipment

Technical field.

Stabilizer is one of important tool in the drilling engineering borehole track control technologys such as oil gas, underground heat, geologic prospect, its structure of existing stabilizer is fixed, three big defectives are arranged, first, cause the blocked portion phenomenon when making a trip, increase unnecessary drilling cost, reduce the drilling well timeliness, second, the diameter of stabilizer can only be less than bit diameter, influence borehole track control effect, the 3rd, the work plane of stabilizer is in case wear and tear, be difficult to repair, its body can not continue to use, and causes waste, is unfavorable for reducing drilling cost.

The purpose of this utility model is that a kind of hydraulic pressure tapered stabilizer will be provided, it can overcome above-mentioned shortcoming, mainly utilize mud pressure in the drill string in the drilling process to be higher than the characteristics of the empty power of annular space, make stabilizer wing centre section piece when turn on pump, extend out to predetermined size and work, realize the reducing function.After the termination of pumping, wing piece automatic drawing back under the effect of hydraulic coupling helps carrying or transfers operations such as drill string to original position.

The purpose of this utility model is achieved in that

A kind of hydraulic pressure tapered stabilizer, it goes up assembling 4 equally distributed wing pieces (3) at housing (1), wing piece (3) is fixed on the wing piece pad (2) with screw (10), axle (4) is housed in the housing (1), and this axle upper diameter is thinner, forms a step (11), spring (6) and the back-up ring that moves about (7) are housed on the step, a plug (5) is equipped with in side, housing (1) middle part, the lower end roof pressure of movable restriction (8) back-up ring (7) that moves about, and housing (1) top links with awl button and top connection (9).

Wing piece (3) is the Long Circle part, and the top end face is circular-arc, and there is groove (16) side, can put sealing ring (14).

There is sealing ring (15) side of axle (4) bottom, and the inner and outer ring of back-up ring (7) has sealing ring (12).

Fig. 1 tapered stabilizer schematic diagram;

Fig. 2 wing block assembly schematic diagram;

The vertical view of Fig. 3 Fig. 2.

Now in conjunction with the accompanying drawings the structure of hydraulic pressure tapered stabilizer is described in detail:

By Fig. 1, going up 4 of assemblings at housing (1) evenly distributes, and removable wing piece (3), this wing piece (3) is fixed on the wing piece pad (2) with screw (10), axle (4) is housed in the housing (1), axle (4) upper part diameter is thin than the bottom, thereby on axle, form a step, spring (6) and the back-up ring that moves about (7) are housed on the step (11), and back-up ring (7) inner and outer ring all is equipped with sealing ring (12), makes back-up ring (7) place the top of the axle (4) in the housing (1), a plug (5) is equipped with in the side at housing (1) middle part, be full of hydraulic oil in the cavity between step (11) and housing (1) inwall, can lay down plug (5) in case of necessity, add or the hydraulic oil that leaks, movable restriction (8) top is thicker, sealing (13) is housed, the direct roof pressure in its lower end back-up ring (7) that moves about, housing (1) top links with top connection (9) with the awl button.

Wing piece (3) is equipped with sealing ring (14), and sealing ring (15) also is equipped with in the side of axle (4) bottom.

By Fig. 2,3, wing piece (3) is fixing with screw (10) with wing piece pad (2), and wing piece (3) side fluted (16) is used for putting sealing ring (14).

Wing piece (3) is oval shape part, and the top end face is circular-arc.

During turn on pump, move about back-up ring (7) in drill string with annular space in mud oar pressure differential and movable restriction (8) produce under the force action of a thrust, the back-up ring (7) that moves about moves down, make wing piece (3) in the housing (1) extend out to predetermined size and work, realize the reducing function, during termination of pumping, spring (6) resets the back-up ring that moves about (7), and wing piece (3) automatic drawing back under the effect of hydraulic coupling helps carrying or transfers operations such as drill string to original position.

Above-mentioned situation shows that the hydraulic pressure tapered stabilizer can play the effect of stabilizer, and the unlikely again tight trip card phenomenon that causes has reduced the generation of lock of tool drilling, reduces drilling cost.

Compared with prior art, the hydraulic variable diameter stabilizer has following advantages:

1, after the termination of pumping, the wing piece of tapered stabilizer automatic drawing back under action of hydraulic force is extremely original State can not cause to be hampered card or to pull out the piston accident, and is safe and reliable.

If 2, the stabilizer working face is worn, its wing piece of field replaceable, do not need to change or Purchase new stabilizer, save acquisition expenses.

3, can pass through the turn on pump termination of pumping for the sticking card accident of drill collar, apply transversely excited to drill collar, Can get rid of rapidly lock of tool drilling.

4, the move about stroke of back-up ring is limited by the step of axle, guarantees the stabilizer outside dimension.

5, movable restriction can increase the thrust of the back-up ring that moves about, and guarantees that stabilizer wing piece extend out to the precalculated position.

6, the flexible stroke of wing piece depends on the stroke of the back-up ring that moves about.

Claims

1, a kind of hydraulic pressure tapered stabilizer, it is characterized in that going up assembling 4 equally distributed wing pieces (3) at housing (1), wing piece (3) is fixed on the wing piece pad (2) with screw (10), axle (4) is housed in the housing (1), this axle upper diameter is thinner, form a step (11), spring (6) and the back-up ring that moves about (7) are housed on the step, a plug (5) is equipped with in side, housing (1) middle part, the lower end roof pressure of movable restriction (8) back-up ring (7) that moves about, housing (1) top links with awl button and top connection (9).

2, stabilizer according to claim 1 is characterized in that wing piece (3) is the Long Circle part, and the top end face is circular-arc, and there is groove (16) side, can put sealing ring (14).

3, stabilizer according to claim 1 is characterized in that there is sealing ring (15) side of axle (4) bottom, and the inner and outer ring of back-up ring (7) has sealing ring (12).