CN2864067Y - Electrically controlled diameter changeable type stabilizer - Google Patents

Abstract

The utility model relates to an electrically controlled diameter changeable type stabilizer comprising a main body, a core shaft, a central pipe and a control mechanism. A plurality of holes are opened on the upending rowed of the main body and are filled with plungers, a pressure sensor is installed on the core shaft, a control unit, an electromagnetic valve and a power are installed in the ring fillister of the pressure sensor, the central pipe connects with the inferior part of the pressure sensor, a return-spring is set between the bottom of the central pipe and the steps of the main body, holes are respectively bored on the corresponding position to the electromagnetic valve of the main body and the core shaft, inwhich the holes on the main body connect with the external annulus, the holes on the core shaft connect with the enclosed-cavity formed by the central pipe, the core shaft and the main body, trapezoid grooves are processed on the cylindrical of the central pipe and are corresponding to the holes on the upending rowed of the main body, while trapezoid bosses are processed on the bottom of the plunger. The utility model adopts the design of the electric control variable diameter, has the advantages of the little volume, high precision and reliability and the manufacture difficulty degree of the tool is low.

Description

Automatically controlled variable gauge stabilizer

Technical field

The utility model relates to and is used for automatically controlled variable gauge stabilizer that well track is controlled in the oilfield drilling, belongs to oil drilling downhole tool class.

Background technology

At present, there are following problem in actual use in domestic horizontal well drilling technique of extensively promoting the use of and technology: in the drillng operation of directional well, horizontal well, often be subjected to the influence of factors such as formation condition, construction technology program with the drilling tool of routine, be difficult to control on ground and change its operating characteristic, can only adjust DHA by frequent making a trip, can finish complicated drillng operation.Simultaneously, make well track present " fluctuation " formula, can produce additional moment of torsion and resistance because of adjustment cycle is long.Therefore, the conventional drilling instrument can't adapt to directional well, horizontal well drilling technique and the technical requirements of present complexity, and the exploitation of remote control drilling tool has become the inexorable trend of modern drilling technology development.

The remote control drilling tool is meant by terrestrial operation person and sends instruction, realizes the parameter of downhole drill instrument, the change of state.Because the parameter and the state of down-hole remote control drilling tool can be adjusted at any time, therefore the drilling engineering personnel can be according to the actual conditions of down-hole, under situation about not making a trip, adjust DHA timely by the ground remote control operation, to satisfy the requirement of drilling technology.

Domestic how tame research institution begins to carry out the research and development of remote control tapered stabilizer in succession in the early 1990s,, has obtained certain breakthrough technically, and has finished the trial-production of model machine through for many years tackling key problem with reference to foreign technology.But verify by field trial, because limitation that is designed and the influence of the complexity of mechanical mechanism, comprise our unit's remote control tapered stabilizer of application in the past, all realize the remote control control of instrument with the design of pure mechanical mechanism, the design of pure mechanical mechanism has caused the manufacture difficulty height of instrument and security reliability is very low, is hampered thereby cause applying.

Summary of the invention

For solving the problem of above-mentioned existence, the utility model provides a kind of automatically controlled variable gauge stabilizer.

The utility model is mainly by body 1, mandrel 8, central tube 12, controlling organizations etc. are partly formed, setting upright of body 1 has several holes on the rib, plunger 11 is installed in the hole, place's pressure sensor 2 is installed on mandrel 8, control module 3 is installed in the annular groove on it, electromagnetic valve 5 and power supply 4, the bottom is connected with central tube 12, between the interior step of the bottom of central tube 12 and body 1 back-moving spring 14 is arranged, be drilled with the hole respectively on body 1 and mandrel 8 and the electromagnetic valve 5 pairing positions, wherein the hole on the body 1 is communicated with extraneous annular space, hole on the mandrel 8 and central tube 12, mandrel 8, the formed enclosed cavity of body 1 three is connected, be processed with dovetail groove on the cylindrical of central tube 12, and the hole of opening on the rib with setting upright of body 1 is corresponding, and the bottom of plunger 11 is processed with measure-alike trapezoid boss.

The utility model has adopted automatically controlled reducing design, utilize slush pump to produce pressure pulse signal and with drilling fluid as transmission medium, become the controlling organization of machine-electricity-liquid one by set such as sensor, Based Intelligent Control mechanism and actuating units, the volume that microelectric technique had that makes full use of maturation is little, precision is high and the advantage of high reliability, the reduction and the security reliability that have realized the manufacture difficulty of instrument greatly promote, and that guarantees to apply carries out smoothly.

Description of drawings

Fig. 1 is the utility model structural representation

Fig. 2 is the A-A sectional view of Fig. 1

The specific embodiment

Be described in further detail below in conjunction with 1 pair of the utility model of accompanying drawing.The automatically controlled variable gauge stabilizer of the utility model is made up of major parts such as body 1, pressure sensor 2, control module 3, power supply 4, electromagnetic valve 5, plunger 11, central tubes 12.Place's pressure sensor 2 is installed on the mandrel 8, control module 3, electromagnetic valve 5 and power supply 4 are installed in the annular groove on it.The bottom is connected with central tube 12, and back-moving spring 14 is positioned at its bottom.Be drilled with the hole respectively on body 1 and mandrel 8 and the electromagnetic valve 5 pairing positions, wherein the hole on the body 1 is communicated with extraneous annular space, and the hole on the mandrel 8 is connected with central tube 12, mandrel 8, the formed enclosed cavity of body 1 three.Mandrel 8, central tube 12 are equipped with " Y " RunddichtringO 9,10,13 and " O " RunddichtringO respectively.Between mandrel 8 and the body 1 screw 6 is housed.

Store the coding of the various duties of variable gauge stabilizer in the control module 3, before instrument is gone into the well at first on rig floor by slush pump being left-termination of pumping operation, the pressure pulse code signal that produces, be transferred to control module 3 after detecting by pressure sensor 2, output control instruction manipulation electromagnetic valve 5 was adjusted to body 1 with spool after control module 3 was judged identification, mandrel 8, the position that the closed chamber that central tube 12 forms is communicated with the outer annular space of instrument, at this moment, closed chamber is in low-pressure state, promoting lower center tube 12 at back-moving spring 14 is positioned at topmost, plunger 11 is seated in the dovetail groove, and this moment, instrument promptly was adjusted to the minor diameter state.After at the bottom of the smooth lower going-into-well of instrument, according to the needs of drilling technology can continue on ground by open-termination of pumping produces with the corresponding pulse signal of required duty and sends to downhole tool.Be in the major diameter state as the needs instrument, then by open-termination of pumping produces the instruction coding of one group of major diameter duty, this instruction sends to the down-hole by drilling fluid as transmission medium, be transferred to control module 3 after being detected by pressure sensor 2, control module 3 judges that the instruction of identification back output control corresponding handles electromagnetic valves 5 and spool is adjusted to closed chamber be connected with hydrophthalmia in the instrument, closes being communicated with of closed chamber and outer annular space simultaneously.This moment, central tube 12 was descending under the effect of drilling fluid inside and outside differential pressure, utilized the inclined-plane in the dovetail groove that plunger 11 is released, and made instrument be in the major diameter state.Changeing back the operation that the minor diameter state only need the repetition instrument goes into before the well when the rig floor face as needs gets final product.The general pump operated change that can not cause tool state of start-stop in drilling process.

Claims (1)

1, a kind of automatically controlled variable gauge stabilizer, mainly by body (1), mandrel (8), central tube (12) and controlling organization are formed, setting upright of body (1) has several holes on the rib, plunger (11) is installed in the hole, it is characterized in that: place's pressure sensor (2) is installed on mandrel (8), control module (3) is installed in the annular groove on it, electromagnetic valve (5) and power supply (4), the bottom is connected with central tube (12), back-moving spring (14) is arranged between the interior step of the bottom of central tube (12) and body (1), be drilled with the hole respectively on body (1) and mandrel (8) and the pairing position of electromagnetic valve (5), wherein the hole on the body (1) is communicated with extraneous annular space, hole on the mandrel (8) and central tube (12), mandrel (8), the formed enclosed cavity of body (1) three is connected, be processed with dovetail groove on the cylindrical of central tube (12), and with body (1) to set upright the hole of opening on the rib corresponding, and the bottom of plunger (11) is processed with measure-alike trapezoid boss.

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