CN2424293Y - Positive output volume remote control diameter variable stabilizer - Google Patents

Abstract

The utility model relates to a positive output volume remote control diameter variable stabilizer which is mainly composed of an upper joint, a stabilizer shell and a lower joint, wherein the stabilizer shell mainly comprises a changeable throttling port, a supporting seat of the changeable throttling port, a spindle power rod, a spindle, a movable check ring, a flow guiding plate of a side through hole, a wing block, a positioning pin, etc. When a real drilling well bore deviates from the track of a designed well bore, the diameter of a diameter variable stabilizer in the combination of drilling devices at a well bottom is changed by the remote control from the ground surface to change the mechanical characteristic of the drilling devices at a well bottom. Therefore, the requirements of increasing slope, decreasing slope and stabilizing slope of the well bore can be met in order to improve the track control precision of the well bore, reduce the times of taking off and putting down a drill, reduce the drilling cost and improve the drilling economic benefit.

Description

Positive discharge capacity remote control tapered stabilizer

The utility model belongs to the corollary apparatus of oil drilling equipment, specially refers to a kind of stabilizer of positive discharge capacity remote control reducing.

This positive discharge capacity remote control tapered stabilizer is the downhole tool that is used for oil/gas drilling process borehole track control technology, it is with the remote control tapered stabilizer of the mud displacement of mud displacement when normally creeping into as control signal, is called positive discharge capacity remote control tapered stabilizer.

Satisfy the requirement of design borehole track in order to ensure real drilling well eye rail, usually all use stabilizer in the drilling process, conventional stabilisers is fixed because of its structure, when in case drilled wellbore trajectories does not satisfy the requirement of design borehole track, change bottom hole assemblies with regard to requiring with the way that makes a trip, to satisfy the needs of track control technology.Change bottom hole assemblies owing to make a trip and not only can prolong the drillng operation time, but also cause easily be hampered, drilling failure such as bit freezing, increase unnecessary drilling cost, reduce the drilling well timeliness, thereby just wish to design a kind of way that need not make a trip, but realize the purpose of borehole track control by the mode of remote control change down-hole stabilizer radial dimension.

The purpose of this utility model is: overcome the make a trip defective of change bottom hole assemblies mechanical characteristic of in the past usefulness, design a kind of when real drilling well eye off-design borehole track, with positive discharge capacity as control signal, the diameter of the tapered stabilizer in ground remote control change bottom hole assemblies, the mechanical characteristic of bottom hole assemblies is changed, satisfy the requirement of well increasing hole angle, drop angle or hold angle, to improve the hole trajectory control precision, reduce the number of times that makes a trip, reduce drilling cost.

The utility model is realized by following technical proposals: a kind of positive discharge capacity remote control tapered stabilizer is characterized in that the structural order of stabilizer is followed successively by top connection, stabilizer housing and lower contact; Assembly relation in the stabilizer housing is, being close to the top connection lower end is interchangeable restriction and bearing thereof, axle power rail and back-moving spring thereof are arranged below the bearing, axle power rail lower end is connecting the axle that has cam and cotter way structure, have by-pass prot on the axle, be provided with movable ring washer between axle and housing, the outside of housing is provided with the by-pass prot deflector, the lower end is connected to wing piece and back-moving spring thereof, housing under the wing piece is provided with the alignment pin baffle plate, there are alignment pin and back-moving spring thereof in the baffle plate inboard, is connected to positioning joint in the axle bottom, by axle, housing, be full of hydraulic oil in the cavity that movable back-up ring is formed and seal by sealing ring.

Its operating principle is: when tapered stabilizer being sent control instruction (control instruction is that mud displacement is greater than the mud displacement under the normal drilling condition), referring to Fig. 1,2, the restriction bearing moves down under the pressure effect that interchangeable restriction two ends pressure reduction is produced, until contacting with the axle power rail, because the mud flow diameter of the contact jaw of restriction bearing and axle power rail is less than the mud flow diameter of axle power rail, mud is also produced bigger pressure differential at this by second throttle, so that the power of axle motion to be provided, axle is moved downward.In the process that axle moves downward, alignment pin in the pin-and-slot mechanism moves in given axle cotter way, axle is produced rotatablely move and enter another cotter way on the axle, the pin-and-slot mechanism of being made up of groove on the axle and alignment pin is determined the position of axle overhead cam.Because axle and the contacted position of wing piece are cam structure, and determine the position of wing piece, the purpose of realization reducing by the height of cam table top.When positioning joint moves downward when contacting with lower contact, when if by-pass prot on the axle and the through flow hole on the housing coincide, then from then on mud shunted, pressure size in the rig floor upper riser post is changed, thereby can be according to the diameter of this stabilizer of the size of the pressure in steady pipe indication.When mud displacement was discharge capacity under the normal drilling condition, the insufficient pressure that restriction two ends pressure reduction is produced do not have the additional thrust that second throttle produces on axle, thereby the stabilizer diameter remained unchanged in the restriction bearing is moved.

The structure of restriction bearing is that the mud runner is the cylinder body with three grades of steps, and the one-level step is installed restriction, and middle for the side has the runner of by-pass prot, the less step of another grade internal diameter is the second throttle mouth.

The good effect of this stabilizer is when real drilling well eye off-design borehole track, needn't make a trip, with positive discharge capacity as control signal, just can be on rig floor remote control change tapered stabilizer diameter in the bottom hole assemblies, to satisfy the requirement of well increasing hole angle, drop angle or hold angle.Can improve the well control accuracy, reduce drilling cost, shorten well construction period, improve drilling efficiency.

Below in conjunction with accompanying drawing the utility model embodiment is described further:

Description of drawings:

Fig. 1 is the upper semisection of positive discharge capacity remote control tapered stabilizer structure chart with the aa boundary;

Fig. 2 is the lower semisection of positive discharge capacity remote control tapered stabilizer structure chart with the aa boundary;

Fig. 3 is axle by-pass prot combination;

Fig. 4 is axle cam structure figure;

Fig. 5 is positive discharge capacity remote control tapered stabilizer overall construction drawing.

Wherein top connection 1 is connected the upper end of stabilizer housing 2, on the lower end that connects connects is interchangeable restriction and bearing 3 thereof, be axle power rail 4 below, the lower end is connecting the axle 5 that has cam and cotter way structure, have by-pass prot 6 on the axle, be provided with movable ring washer 7 between axle and housing, be lower contact 8 bottom, the outside of housing is provided with the deflector 9 of by-pass prot, the lower end is connected to wing piece 11 and back-moving spring 10 thereof, be connected to alignment pin baffle plate 12 below the wing piece, it blocks and is positioned at inboard alignment pin 13, and back-moving spring 14, be connected to positioning joint 15 in the axle bottom, when axle 5 moved downward positioning joint 15 and contacts with lower contact 8, by-pass prot 6 coincided with through flow hole 16 on the axle, forms relief port.

Claims (5)

1, a kind of positive discharge capacity remote control tapered stabilizer is characterized in that the structural order of stabilizer is followed successively by top connection, stabilizer housing and lower contact; Assembly relation in the stabilizer housing is, being close to the top connection lower end is interchangeable restriction and bearing thereof, axle power rail and back-moving spring thereof are arranged below the bearing, axle power rail lower end is connecting the axle that has cam and cotter way structure, have by-pass prot on the axle, be provided with movable ring washer between axle and housing, the outside of housing is provided with the by-pass prot deflector, the lower end is connected to wing piece and back-moving spring thereof, housing under the wing piece is provided with the alignment pin baffle plate, there are alignment pin and back-moving spring thereof in the baffle plate inboard, is connected to positioning joint in the axle bottom, by axle, housing, be full of hydraulic oil in the cavity that movable back-up ring is formed and seal by sealing ring.

2, according to the described stabilizer of claim 1, the structure that it is characterized in that the restriction bearing is that the mud runner is the cylinder body with three grades of steps, the one-level step is installed restriction, and middle for the side has the runner of by-pass prot, the less step of another grade internal diameter is the second throttle mouth.

3,, it is characterized in that determining the position of axle overhead cam by the pin-and-slot mechanism that groove on the axle and alignment pin are formed according to the described stabilizer of claim 1.

4,, when it is characterized in that by-pass prot on the axle and the through flow hole conducting on the housing, form relief port according to the described stabilizer of claim 1.

5,, it is characterized in that the wing piece of stabilizer relies on the back-moving spring structure to be resetted according to the described stabilizer of claim 1.

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