CN104533315B - The pressue device and its propulsion method of full hydraulic drive down-hole string - Google Patents

The pressue device and its propulsion method of full hydraulic drive down-hole string Download PDF

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Publication number
CN104533315B
CN104533315B CN201410775595.8A CN201410775595A CN104533315B CN 104533315 B CN104533315 B CN 104533315B CN 201410775595 A CN201410775595 A CN 201410775595A CN 104533315 B CN104533315 B CN 104533315B
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China
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actuation
propulsion
anchored
hydraulic
toroidal cavity
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CN104533315A (en
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侯福祥
马汝涛
彭嵩
徐丙贵
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China National Petroleum Corp
CNPC Engineering Technology R&D Co Ltd
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China National Petroleum Corp
CNPC Drilling Research Institute Co Ltd
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B19/00Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/08Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods

Abstract

A kind of pressue device and its propulsion method of full hydraulic drive down-hole string of the present invention, pressue device include the second actuation mechanism, hydraulic control center and the first actuation mechanism being sequentially connected;First, second actuation mechanism includes anchoring assembly, hydraulic cylinder and propelling piston, propelling piston fixed center pipe;Propelling piston slides in hydraulic cylinder, and anchoring assembly one end is slidably and sealingly placed in hydraulic cylinder and its exposed parts can radially hypertonic;Anchored end toroidal cavity is formed between anchoring assembly and propelling piston, propulsion end toroidal cavity is formed between propelling piston and propulsion end end cap;The anchored end toroidal cavity and propulsion end toroidal cavity of the second actuation mechanism is connected with the anchored end toroidal cavity and propulsion end toroidal cavity of the first actuation mechanism respectively;The respective anchoring assembly hypertonic of first, second actuation mechanism is controlled respectively successively by the oil-feed and pressure release of anchored end toroidal cavity;Hydraulic control centre-driven propelling piston makes tubing string enter under continuing to propulsion one side shifting of end end cap.

Description

The pressue device and its propulsion method of full hydraulic drive down-hole string
Technical field
The present invention relates to oil gas drilling and production technology field, more particularly to a kind of energy is that down-hole string applies all hydraulic of thrust Pressurizing tool, and thrust is provided for down-hole string, realize loading the pressure of the drill, the method for aiding in running string.
Background technology
As Oil And Gas Exploration And Development is expanded towards deeper, more complicated stratum, the exceptional well such as horizontal well, extended reach well The application of type is more and more extensive.In the old filed of development late stage, casing window sidetracking or barefoot laterally drilling horizontal well are to dig The important means of latent production capacity.
In drilling process, the pressure of the drill on drill bit is typically loaded by the weight of drill string.But in horizontal well, extended reach well, by Fit with the borehole wall in most of drill string, produce larger frictional resistance, hamper effective transmission of the pressure of the drill, power auger may be caused Speed is greatly reduced, and drilling cost is improved therewith;When serious, or even cannot bore up to projected depth.In addition, continuous pipe drilling and repairing well, brill Well is an emerging technology for having broad prospect of application, with the multiple advantages that conventional drilling does not possess, while being also faced with one It is the subject matter for currently facing to enter under the loading of the new technical barrier of series, wherein the pressure of the drill and continuous pipe.
Continuous pipe is affected due to the restriction by rigidity and wall friction resistance, fashionable easily in down-hole shape under long range Into spring sigmoid, winding, and then self-locking is formed, so as to target zone cannot be lowered into.Itself cannot be relied on during continuous pipe drilling well Weight and self-strength provide effective the pressure of the drill, it is desirable to provide single the pressure of the drill equipment.Hydraulic thruster is usually used to be connected The pressure of the drill loading of continuous pipe drilling well, but effect is not ideal enough, it is difficult to meet the demand of complicated field working conditions.
The content of the invention
To solve above-mentioned technical problem, the present invention proposes a kind of pressue device of full hydraulic drive down-hole string to realize Enter under the loading of the pressure of the drill and the continuing of continuous pipe, the present invention also proposes a kind of propulsion method of full hydraulic drive down-hole string, institute The method of stating is the job step of the pressue device, and the method is that the central canal connected on the pressue device loads lasting brill Pressure.
The present invention a kind of full hydraulic drive down-hole string pressue device, including the second actuation mechanism being sequentially connected, Hydraulic control center and the first actuation mechanism;
First actuation mechanism and second actuation mechanism include the anchoring assembly for setting gradually, hydraulic cylinder and push away Enter piston, the propelling piston is fixedly connected a central canal, and the central canal runs through the anchoring assembly and the hydraulic cylinder;Institute The two ends of hydraulic cylinder are stated respectively by anchored end end cap and propulsion end end cap seal, the propelling piston can be in the hydraulic cylinder Slide in propelling piston stroke chamber, one end of the anchoring assembly is slidably and sealingly placed in the hydraulic cylinder, the anchoring group Part exposes to the part of the hydraulic cylinder and can radially expand or shrink;
The annular gap of the outer wall of the central canal and the inwall of the hydraulic cylinder is in the anchoring assembly and the propulsion Anchored end toroidal cavity is formed between piston, the annular gap of the outer wall of the central canal and the inwall of the hydraulic cylinder is described Propulsion end toroidal cavity is formed between propelling piston and propulsion end end cap;The anchored end annular of second actuation mechanism is empty Chamber and propulsion end toroidal cavity are respectively by the pipeline at the hydraulic control center and corresponding anchored end in first actuation mechanism Toroidal cavity and propulsion end toroidal cavity connection;
The anchor of first actuation mechanism is controlled successively by hydraulic control center described in the oil-feed of the anchored end toroidal cavity Gu the anchoring assembly expansion of component and second actuation mechanism, by hydraulic control described in the pressure release of the anchored end toroidal cavity The heart controls the anchoring assembly of first actuation mechanism successively and the anchoring assembly of second actuation mechanism shrinks;By described Hydraulic control center drives the propelling piston and the central canal towards the propulsion end to oil-feed in the anchored end toroidal cavity One side shifting of end cap.
As a kind of enforceable mode, the hydraulic control center include the first stroke valve, the second stroke valve, main reversing valve and Sequence valve;First stroke valve is connected with the propulsion end end cap of first actuation mechanism, second stroke valve with it is described The propulsion end end cap connection of the second actuation mechanism;
The main reversing valve is connected with the oil-in at the hydraulic control center by main oil inlet pipe road, the main reversing valve difference By the first in-line, anchored end toroidal cavity, second start of the second in-line and first actuation mechanism The anchored end toroidal cavity connection of mechanism;The sequence valve is connected with the main oil inlet pipe road, and the sequence valve passes through the master The pressure signal of in-line controls the conducting between the main reversing valve and the oil return opening at the hydraulic control center;Pushed away by described Enter described with the contact of the propulsion end end cap hydraulic control center of piston and control first stroke valve or second stroke valve Triggering.
Further, the anchoring assembly include sliding be sleeved on the central canal anchor arm support ring, can be along footpath To expansion or at least three anchor arms for shrinking, slide block and anchoring piston;The anchor arm support ring is located at the anchoring assembly The end of the part of the hydraulic cylinder is exposed to, one end of the anchor arm is fixed in the anchor arm support ring, and which is another End is fixed on the anchored end end cap;
The anchoring piston is sleeved on the central canal, and one end of the anchoring piston is slidably and sealingly placed in the liquid In cylinder pressure;The anchor arm is distributed along the even circumferential of the central canal, and the slide block is located at the cavity that the anchor arm is surrounded Interior, the slide block is sleeved on the anchoring piston;The anchoring piston is promoted by the oil-feed of the anchored end toroidal cavity Move towards the anchored end end cap, the anchoring piston promotes the periphery of the slide block, the slide block to extrude the anchor arm Radially expand.
Further, the anchoring piston includes sleeve part and is fixedly set in the piston portion of described sleeve part one end, institute State piston portion to be slidably and sealingly placed in the hydraulic cylinder;Step is set on the outer wall of the sleeve part, and the slide block can be along institute The outer wall for stating sleeve part slide until with the horizontal plane of the step against.
Used as a kind of enforceable mode, pocketed springs on the anchoring piston, the two ends of the spring bear against The inner side of the piston portion and the anchored end end cap.
As a kind of enforceable mode, at least one clinohedral, the clinohedral bag are set on the outer wall of the slide block Include multiple inclined-planes that the even circumferential along the slide block is distributed, the inclined-plane towards the anchor arm support ring one end to described The inclined of slide block;The inclined-plane extrudes the anchor arm, the anchor arm towards the motion of the anchor arm support ring Radially expand and anchor with the extraneous borehole wall.
Further, the quantity of the clinohedral is at least one, has three inclined-planes in the clinohedral, described Inclined-plane is corresponding along the distributing position of the circumference of the central canal with the anchor arm along the distributing position of the circumference of the slide block.
As a kind of enforceable mode, roller is set on the anchor arm, the roller can be rolled on the inclined-plane.
Further, the central canal is included by the propelling piston of second actuation mechanism, the hydraulic control center and institute State first paragraph, second segment, the 3rd section and the 4th section that the propelling piston of the first actuation mechanism is separated to form;
The two ends of the propelling piston are respectively provided with the first groove and the second groove, and first groove is towards the anchoring End end cap, second groove is towards propulsion end end cap;In first groove and the second groove of second actuation mechanism The first paragraph and the second segment are respectively fixedly connected with, in first groove and the second groove of first actuation mechanism respectively It is fixedly connected described 3rd section and described 4th section;
The pipe passage of insertion, an anchored end are set between the bottom land of the bottom land of first groove and second groove Hydraulic channel penetrates into the end face at the first groove place end of the propelling piston, a propulsion end from the bottom land of first groove Hydraulic channel penetrates into the end face at the second groove place end of the propelling piston from the bottom land of second groove;
The one end of the anchored end hydraulic channel of second actuation mechanism on the bottom land of first groove passes through first The one end of the anchored end hydraulic channel of pipeline and first actuation mechanism on the bottom land of first groove connects;Described The one end of propulsion end hydraulic channel on the bottom land of second groove of two actuation mechanisms passes through the second pipeline and described first One end connection of the propulsion end hydraulic channel of actuation mechanism on the bottom land of second groove;First pipeline and described Two pipelines are placed in the pipe passage and the central canal.
As a kind of enforceable mode, the part of the hydraulic cylinder of second actuation mechanism is exposed in the second segment Outer wall on or second actuation mechanism hydraulic cylinder inwall on locating part is set, the locating part limits described second and makees The position that the propelling piston of motivation structure is moved in the corresponding hydraulic cylinder.
The propulsion method of a kind of full hydraulic drive down-hole string of the present invention, using described full hydraulic drive down-hole string Pressue device, its course of work are as follows:
S10, before the full hydraulic drive down-hole string pressue device enters well, the propulsion end ring shape to the first actuation mechanism is empty The propulsion end toroidal cavity of chamber and the second actuation mechanism is filled with hydraulic oil;By the full hydraulic drive down-hole string pressue device and Central canal is lowered into down-hole together;
S20, hydraulic control center control hydraulic oil enter the anchored end toroidal cavity of first actuation mechanism, and described first makees The anchoring assembly tensioning anchoring of motivation structure, the pressure of the anchored end toroidal cavity of first actuation mechanism reach limit value, institute The anchored end toroidal cavity for stating the first actuation mechanism promotes corresponding propelling piston to drive the central canal being fixedly connected thereon Towards the propulsion end end cap motion of first actuation mechanism;
Hydraulic oil in the propulsion end toroidal cavity of first actuation mechanism flows into described second by pipeline and makees motivation The propulsion end toroidal cavity of structure, the hydraulic cylinder of second actuation mechanism make motivation towards described first relative to the central canal Structure is moved;
S30, hydraulic control center control hydraulic oil enter the anchored end toroidal cavity of second actuation mechanism, and described the The anchoring assembly tensioning anchoring of two actuation mechanisms, the pressure of the anchored end toroidal cavity of second actuation mechanism reach restriction Value;Meanwhile, the anchored end toroidal cavity release of first actuation mechanism, the anchoring assembly of first actuation mechanism shrink multiple Position;The anchored end toroidal cavity of second actuation mechanism promote corresponding propelling piston drive be fixedly connected thereon it is described in Propulsion end end cap motion of the heart pipe towards second actuation mechanism;
S40, is repeated in above-mentioned S20 and S30, and the central canal is continued towards propulsion end end cap propulsion.
Further, in the S20, the pressure of the anchored end toroidal cavity of first actuation mechanism reaches the hydraulic control The limit value of the sequence valve setting at center, the sequence valve conducting;The propelling piston of first actuation mechanism is moved to and institute The propulsion end end cap contact of the first actuation mechanism is stated, the propulsion end end with first actuation mechanism at the hydraulic control center is triggered First stroke valve of lid connection, the main reversing valve commutation at the hydraulic control center, the main reversing valve control the flow direction of hydraulic oil, institute State sequence valve reset;
In the S30, the pressure of the anchored end toroidal cavity of second actuation mechanism reaches the sequence valve setting Limit value, the sequence valve conducting;The propelling piston of second actuation mechanism is moved to and is pushed away with second actuation mechanism Inlet side end cap contact, triggers second stroke being connected with the propulsion end end cap of second actuation mechanism at the hydraulic control center Valve, the main reversing valve commutation, the sequence valve reset.
The present invention compared to the beneficial effect of prior art is:The pressue device of full hydraulic drive down-hole string is using complete Hydraulically powered mode, applies axial compressive force to central canal, constantly advances central canal in shaft bottom.Effectively provide in drilling well The pressure of the drill is loaded, and will be entered under the auxiliary of other down-hole strings such as continuous pipe.The pressue device of full hydraulic drive down-hole string can be by Enter relatively long distance under heart pipe, central canal is persistently advanced until arrival target zone, solves continuous pipe or other down-hole string operations At present enter the problem of difficulty.The use of the propulsion method of full hydraulic drive down-hole string is that above-mentioned pressue device effectively pressurizes, The efficiency of drilling well is ensure that, oil field production capacity is improve.
Description of the drawings
Fig. 1 is the structural representation of the pressue device in original state of the full hydraulic drive down-hole string of the present invention;
Fig. 2 is schematic front view of first actuation mechanism in original state;
Fig. 3 is the main view generalized section of hydraulic cylinder in the first actuation mechanism;
Fig. 4 is that the hydraulic control center of the pressue device of the full hydraulic drive down-hole string of the present invention shows in the principle of original state It is intended to;
Fig. 5 is the schematic front view of anchor arm in the first actuation mechanism;
Fig. 6 is the schematic top plan view of anchor arm in the first actuation mechanism;
Fig. 7 is the schematic front view of slide block in the first actuation mechanism;
Fig. 8 is the left view schematic diagram of slide block in the first actuation mechanism;
Fig. 9 is the schematic front view of anchoring piston in the first actuation mechanism;
Figure 10 is the main view generalized section of propelling piston in the first actuation mechanism;
Figure 11 is the left view schematic diagram of propelling piston in the first actuation mechanism.
Reference:
The first actuation mechanisms of 1-;
11- central canals;112- first paragraphs;114- second segments;The 3rd section of 116-;The 4th section of 118-;
12- anchor arm support rings;13- anchor arms;131- anchors arm body;132- bearing pins;133- rollers;
14- slide blocks;142- inclined-planes;15- anchored end end caps;
16- hydraulic cylinders;
161- anchored end toroidal cavities;162- anchoring piston strokes chamber;
163- advances end toroidal cavity;164- propelling piston strokes chamber;
17- springs;18- anchors piston;181- sleeve parts;182- steps;183- piston portions;
19- propelling pistons;
The first grooves of 191-;192- anchored end hydraulic channels;The second grooves of 193-;
194- advances end hydraulic channel;196- pipe passages;
110- advances end end cap;
2- hydraulic controls center;
The second stroke valves of 21-;The first stroke valves of 22-;23- main reversing valves;24- sequence valves;
The second actuation mechanisms of 3-.
Specific embodiment
It is below in conjunction with accompanying drawing, above-mentioned to the present invention to be clearly and completely described with other technical characteristic and advantage, Obviously, described embodiment section Example only of the invention, rather than whole embodiments.
Refer to shown in Fig. 1, the pressue device of a kind of full hydraulic drive down-hole string of the present invention, including what is be sequentially connected Second actuation mechanism 3, hydraulic control center 2 and the first actuation mechanism 1.
Refer to shown in Fig. 2, the first actuation mechanism 1 and the second actuation mechanism 3 are including the anchoring assembly, liquid for setting gradually Cylinder pressure 16 and propelling piston 19;Propelling piston 19 is fixedly connected a central canal 11, and central canal 11 runs through anchoring assembly and hydraulic cylinder 16, in the present embodiment, central canal 11 stretches out anchoring assembly and hydraulic cylinder 16.The two ends of hydraulic cylinder 16 pass through anchored end end cap respectively 15 seal with propulsion end end cap 110.Incorporated by reference to shown in Fig. 3, propelling piston 19 can be in the propelling piston stroke chamber 164 of hydraulic cylinder 16 Middle slip, one end of anchoring assembly are slidably and sealingly placed in hydraulic cylinder 16, are slided in anchoring piston stroke chamber 162;Anchoring Component exposes to the part of hydraulic cylinder 16 and can radially expand or shrink.
As shown in Fig. 2 the annular gap having between the inwall of the outer wall of central canal 11 and hydraulic cylinder 16, annular gap exists Anchored end toroidal cavity 161 is surrounded between anchoring assembly and propelling piston 19, annular gap is at propelling piston 19 and propulsion end end Propulsion end toroidal cavity 163 is surrounded between lid 110.The anchored end toroidal cavity 161 of the second actuation mechanism 3 passes through hydraulic control center 2 Pipeline be connected with the anchored end toroidal cavity 161 of the first actuation mechanism 1, the propulsion end toroidal cavity 163 of the second actuation mechanism 3 It is connected with the anchored end toroidal cavity 161 and propulsion end toroidal cavity 163 of the first actuation mechanism 1 by the pipeline at hydraulic control center 2.
By the oil-feed of anchored end toroidal cavity 161, hydraulic control center 2 controls the anchoring assembly of the first actuation mechanism 1 successively Expand with the anchoring assembly of the second actuation mechanism 3;In the same manner, by the pressure release of anchored end toroidal cavity 161, hydraulic control center 2 is successively The anchoring assembly for controlling the anchoring assembly and the second actuation mechanism 3 of the first actuation mechanism 1 shrinks.By hydraulic control center 2 to first Oil-feed in the anchored end toroidal cavity 161 of the anchored end toroidal cavity 161 of actuation mechanism 1 and the second actuation mechanism 3, hydraulic control center The side shifting that the central canal 11 connected on 2 driving propelling pistons 19 and propelling piston 19 is located towards propulsion end end cap 110.
The pressue device of full hydraulic drive down-hole string applies axial pressure to central canal 11 by the way of full hydraulic drive Power, constantly advances central canal in shaft bottom.The pressure of the drill loading is provided in drilling well effectively, by other down-hole strings such as continuous pipes Enter under auxiliary.In addition, the pressue device of full hydraulic drive down-hole string can will enter relatively long distance under central canal 11, central canal 11 is held Continuous propulsion is until arrival target zone, solves the problems, such as that continuous pipe or other down-hole string operations enter difficulty at present.
As a kind of enforceable mode, refer to shown in Fig. 4, hydraulic control center 2 includes the first stroke valve 22, the second stroke Valve 21, main reversing valve 23 and sequence valve 24;First stroke valve 22 is connected with the propulsion end end cap 110 of the first actuation mechanism 1, and second Stroke valve 21 is connected with the propulsion end end cap 110 of the second actuation mechanism 3.
Main reversing valve 23 is connected with the oil-in (P mouths in figure) at hydraulic control center 2 by main oil inlet pipe road, 23 points of main reversing valve Not Tong Guo the first in-line, the anchored end toroidal cavity 161 of the second in-line and the first actuation mechanism 1, second make motivation The anchored end toroidal cavity 161 of structure 3 connects.Sequence valve 24 is connected with main oil inlet pipe road, and sequence valve 24 is by main oil inlet pipe road Pressure signal controls the conducting between main reversing valve 23 and the oil return opening (T mouths in figure) at hydraulic control center 2;By propelling piston 19 with The contact hydraulic control center 2 of propulsion end end cap 110 controls the triggering of the first stroke valve 22 or the second stroke valve 21.
Further, as shown in Fig. 2 anchoring assembly includes anchor arm support ring 12, at least three anchor arms 13, slide blocks 14 With anchoring piston 18.Anchor arm support ring 12 is slided and is sleeved on central canal 11, and anchor arm support ring 12 is located at anchoring assembly The end of the part of hydraulic cylinder 16 is exposed to, one end of anchor arm 13 is fixed in anchor arm support ring 12, and its other end is fixed To on anchored end end cap 15;Anchor arm 13 can be radially expanded or be shunk, and anchor arm 13 is expanded, and anchor arm support ring 12 is at center Stress sliding on pipe 11.
Anchoring piston 18 is sleeved on central canal 11, and the one end for anchoring piston 18 is slidably and sealingly placed in hydraulic cylinder 16; Anchor arm 13 is distributed along the even circumferential of central canal 11, and slide block 14 is located in the cavity that anchor arm 13 is surrounded, and slide block 14 is sleeved on On anchoring piston 18.By the oil-feed of anchored end toroidal cavity 161, anchored end toroidal cavity 161 promotes anchoring 18 direction of piston Anchored end end cap 15 is moved, and is anchored piston 18 and is promoted suit slide block 14 thereon, then the periphery extruding anchor arm 13 of slide block 14 Radially expand.
More preferably, refer to shown in Fig. 5 and Fig. 6, anchor arm 13 includes with elasticity and the anchoring arm body in strip 131, the two ends for anchoring arm body 131 are respectively provided with pin-and-hole, mounting pin in pin-and-hole, and the two ends of anchoring arm body 131 are fixed peace It is attached in anchor arm support ring 12 and anchored end end cap 15, arm body 131 is anchored when anchor arm 13 occurs radial expanding deformation oil Can rotate around pin, it is to avoid 13 end stress of anchor arm is excessive and fractures.
Further, refer to shown in Fig. 7 and Fig. 8, at least one clinohedral, clinohedral bag are set on the outer wall of slide block 14 Include along slide block 14 even circumferential be distributed multiple inclined-planes 142, inclined-plane 142 towards anchor arm support ring 12 one end to slide block 14 Inclined.Motion extruding anchor arm 13 of the inclined-plane 142 towards anchor arm support ring 12, anchor arm 13 are radially expanded simultaneously Anchor with the extraneous borehole wall.
Further, the quantity of clinohedral is at least one, has three inclined-planes 142 in clinohedral, and inclined-plane 142 is along slide block The distributing position of 14 circumference is corresponding along the distributing position of the circumference of central canal 11 with anchor arm 13.
As a kind of enforceable mode, roller 133 and bearing pin 132 can also be set on anchor arm 13, roller 133 passes through Bearing pin 132 is installed on the anchoring arm body 131 laterally movablely.Slide block 14 is extruded towards the motion of anchor arm support ring 12 During anchor arm 13, roller 133 can be rolled on the inclined-plane 142 of slide block 14, it is to avoid the frictional force between anchor arm 13 and slide block 14 It is excessive, cause parts overheated or damage.
Further, refer to shown in Fig. 9, anchoring piston 18 includes sleeve part 181 and is fixedly set in sleeve part 181 1 The piston portion 183 at end.Piston portion 183 is slidably and sealingly placed in hydraulic cylinder 16;Step 182 is set on the outer wall of sleeve part 181, Slide block 14 can slide up to the horizontal plane with step 182 against step 182 is used for the axial direction for limiting along the outer wall of sleeve part 181 Position, it is to avoid slide block 14 when the expansion of anchor arm 13 is extruded, shrink back towards hydraulic cylinder 16 by slide block 14, it is impossible to effectively extruding anchoring Arm 13 is expanded so that effectively anchoring.
As a kind of enforceable mode, incorporated by reference to shown in Fig. 2, pocketed springs 17 on anchoring piston 18, the two of spring 17 End is born against in the inner side of piston portion 183 and anchored end end cap 15.
More preferably, referring again to the internal diameter for shown in Fig. 3, anchoring piston stroke chamber 162 and propelling piston stroke chamber 164 not Together.In the present embodiment, the internal diameter of the internal diameter more than propelling piston stroke chamber 164 in piston stroke chamber 162, shape in hydraulic cylinder 16 are anchored Into shoulder hole, when the pressure release of anchored end toroidal cavity 161, anchoring piston 18 resets in the presence of spring 17, and shoulder hole rises To the effect of the position for limiting anchoring piston 18.
As a kind of enforceable mode, as shown in figure 1, central canal 11 is included by the propelling piston of the second actuation mechanism 3 19th, the propelling piston 19 of hydraulic control center 2 and the first actuation mechanism 1 is separated to form first paragraph 112, second segment 114, the 3rd section 116 and the 4th section 118.More preferably, the external part of second segment 114 is adopted with the one end at hydraulic control center 2 and is threadedly coupled, the 3rd section 116 external part is adopted with the other end at hydraulic control center 2 and is threadedly coupled.
Refer to shown in Figure 10 and Figure 11, the two ends of propelling piston 19 are respectively provided with the first groove 191 and the second groove 193, towards anchored end end cap 15, the second groove 193 is towards propulsion end end cap 110 for the first groove 191.Second actuation mechanism 3 It is respectively fixedly connected with first paragraph 112 and second segment 114 in first groove 191 and the second groove 193, the of the first actuation mechanism 1 The 3rd section 116 and the 4th section 118 is respectively fixedly connected with one groove 191 and the second groove 193.More preferably, 191 He of the first groove The side wall of the second groove 193 arranges female thread, is closely connected by screw thread with each section of central canal 11.
The pipe passage 196 of insertion, an anchoring are set between the bottom land of the bottom land of the first groove 191 and the second groove 193 End hydraulic channel 192 penetrate into from the bottom land of the first groove 191 propelling piston 19 191 place end of the first groove end face, one Propulsion end hydraulic channel 194 penetrates into the end at the 193 place end of the second groove of propelling piston 19 from the bottom land of the second groove 193 Face.Anchored end hydraulic channel 192 and propulsion end hydraulic channel 194 take the shape of the letter U, more preferably, anchored end hydraulic channel 192 and propulsion End hydraulic channel 194 is symmetrically distributed in the two ends of propelling piston 19, and pipe passage 196 is located at the center of propelling piston 19.
The one end of the anchored end hydraulic channel 192 of the second actuation mechanism 3 on the bottom land of the first groove 191 passes through first pipe The one end of the anchored end hydraulic channel 192 of line and the first actuation mechanism 1 on the bottom land of the first groove 191 connects;Second start The one end of propulsion end hydraulic channel 194 on the bottom land of the second groove 193 of mechanism 3 passes through the second pipeline and the first actuation mechanism One end connection of the 1 propulsion end hydraulic channel 194 on the bottom land of the second groove 193.
First pipeline and the second pipeline are placed in pipe passage 196 and central canal 11;The anchored end of the second actuation mechanism 3 The anchored end of toroidal cavity 161, the anchored end hydraulic channel 192 of the second actuation mechanism 3, the first pipeline and the first actuation mechanism 1 Toroidal cavity 161 is connected, and the propulsion end toroidal cavity 163 of the second actuation mechanism 3, the propulsion end hydraulic pressure of the second actuation mechanism 3 lead to The propulsion end hydraulic channel 194 in road 194, the second pipeline and the first actuation mechanism 1 is connected.
Further, on the outer wall of the part that the hydraulic cylinder 16 of the second actuation mechanism 3 is exposed in second segment 114 or second Locating part is set on the inwall of the hydraulic cylinder 16 of actuation mechanism 3, and locating part limits the propelling piston 19 of the second actuation mechanism 3 in phase The position moved in the hydraulic cylinder 16 answered, it is to avoid in the case of hydraulic fluid pressure shakiness, central canal 11 is supported towards anchor arm The adverse movement of ring 12, so as to affect the speed entered under tubing string.Shoulder hole in locating part and hydraulic cylinder 16, it is ensured that anchored end In pressure release, the adjacent end face for anchoring piston 18 and propelling piston 19 will not adsorb laminating to toroidal cavity 161, toward anchoring end ring Shape cavity 161 again oiling when be not required to overcome extra resistance, the course of work is smooth, it is to avoid full hydraulic drive down-hole string pressurize There is the difficult failure of oiling in device.
A kind of propulsion method of full hydraulic drive down-hole string of the present invention, its course of work are as follows:
S10, before full hydraulic drive down-hole string pressue device enters well, to the propulsion end toroidal cavity of the first actuation mechanism 1 163 and second the propulsion end toroidal cavity 163 of actuation mechanism 3 be filled with hydraulic oil;By full hydraulic drive down-hole string pressue device Down-hole is lowered into together with central canal 11;
S20, the control hydraulic oil of hydraulic control center 2 enter the anchored end toroidal cavity 161 of the first actuation mechanism 1, the first start The anchoring assembly tensioning anchoring of mechanism 1, the pressure of the anchored end toroidal cavity 161 of the first actuation mechanism 1 reach limit value, and first The anchored end toroidal cavity 161 of actuation mechanism 1 promotes corresponding propelling piston 19 to drive 11 court of central canal being fixedly connected thereon Move to the propulsion end end cap 110 of the first actuation mechanism 1;
Hydraulic oil in the propulsion end toroidal cavity 163 of the first actuation mechanism 1 flows into the second actuation mechanism 3 by pipeline Propulsion end toroidal cavity 163, the hydraulic cylinder 16 of the second actuation mechanism 3 are moved towards the first actuation mechanism 1 relative to central canal 11;
S30, the control hydraulic oil of hydraulic control center 2 enter the anchored end toroidal cavity 161 of the second actuation mechanism 3, the second start The anchoring assembly tensioning anchoring of mechanism 3, the pressure of the anchored end toroidal cavity 161 of the second actuation mechanism 3 reach limit value;Together When, 161 release of anchored end toroidal cavity of the first actuation mechanism 1, the anchoring assembly retracted for clearance of the first actuation mechanism 1;Second The anchored end toroidal cavity 161 of actuation mechanism 3 promotes corresponding propelling piston 19 to drive 11 court of central canal being fixedly connected thereon Move to the propulsion end end cap 110 of the second actuation mechanism 3;
S40, is repeated in above-mentioned S20 and S30, and central canal 11 is continued towards advancing end end cap 110 to advance.Using full liquid It is that above-mentioned pressue device effectively pressurizes that pressure drives the propulsion method of down-hole string, it is ensured that the efficiency of drilling well, improves oil Field production capacity.
More preferably, S10 is the original state of full hydraulic drive down-hole string pressue device work, the first actuation mechanism 1 The volume that the propelling piston 19 of propelling piston 19 and the second actuation mechanism 3 is in corresponding propelling piston stroke chamber 164 is maximum Position;General propulsion end toroidal cavity 163 pours the hydraulic oil of about half volume in advance.
Further, in S20, the pressure of the anchored end toroidal cavity 161 of the first actuation mechanism 1 reaches hydraulic control center 2 The limit value of the setting of sequence valve 24, sequence valve 24 are turned on;The propelling piston 19 of the first actuation mechanism 1 is moved to makees motivation with first The propulsion end end cap 110 of structure 1 is contacted, and triggers be connected with the propulsion end end cap 110 of the first actuation mechanism 1 the of hydraulic control center 2 One stroke valve 22, the main reversing valve 23 at hydraulic control center 2 commutate, and main reversing valve 23 controls the flow direction of hydraulic oil, and sequence valve 24 resets;
In S30, the pressure of the anchored end toroidal cavity 161 of the second actuation mechanism 3 reaches the limit value of the setting of sequence valve 24, Sequence valve 24 is turned on;The propelling piston 19 of the second actuation mechanism 3 is moved to and is connect with the propulsion end end cap 110 of the second actuation mechanism 3 Touch, trigger second stroke valve 21 being connected with the propulsion end end cap 110 of the second actuation mechanism 3 at hydraulic control center 2, main reversing valve 23 Commutation, sequence valve 24 reset.
The present invention enters except the pressure of the drill loading when being used for continuous pipe drilling well and under aiding in, it may also be used for other down-hole strings, such as The auxiliary pipe of small size horizontal directional drill.
Particular embodiments described above, has been carried out further to the purpose of the present invention, technical scheme and beneficial effect Describe in detail, it will be appreciated that the foregoing is only the specific embodiment of the present invention, the protection being not intended to limit the present invention Scope.Particularly point out, to those skilled in the art, it is all within the spirit and principles in the present invention, done any repair Change, equivalent, improvement etc., should be included within the scope of the present invention.

Claims (11)

1. a kind of pressue device of full hydraulic drive down-hole string, it is characterised in that full hydraulic drive down-hole string pressue device Including the second actuation mechanism, hydraulic control center and the first actuation mechanism that are sequentially connected;
First actuation mechanism and second actuation mechanism include that the anchoring assembly for setting gradually, hydraulic cylinder and propulsion are lived Plug, the propelling piston are fixedly connected a central canal, and the central canal runs through the anchoring assembly and the hydraulic cylinder;The liquid Respectively by anchored end end cap and propulsion end end cap seal, the propelling piston can be in the propulsion of the hydraulic cylinder at the two ends of cylinder pressure Slide in piston stroke chamber, one end of the anchoring assembly is slidably and sealingly placed in the hydraulic cylinder, outside the anchoring assembly The part for being exposed to the hydraulic cylinder can radially expand or shrink;
The annular gap of the outer wall of the central canal and the inwall of the hydraulic cylinder is in the anchoring assembly and the propelling piston Between form anchored end toroidal cavity, the annular gap of the outer wall of the central canal and the inwall of the hydraulic cylinder is in the propulsion Propulsion end toroidal cavity is formed between piston and propulsion end end cap;The anchored end toroidal cavity of second actuation mechanism and Propulsion end toroidal cavity is respectively by the pipeline at hydraulic control center anchored end annular corresponding with first actuation mechanism Cavity and propulsion end toroidal cavity connection;
The anchoring group of first actuation mechanism is controlled successively by hydraulic control center described in the oil-feed of the anchored end toroidal cavity Part and second actuation mechanism anchoring assembly expansion, by hydraulic control center described in the pressure release of the anchored end toroidal cavity according to The anchoring assembly of the anchoring assembly of the first actuation mechanism described in secondary control and second actuation mechanism shrinks;By the hydraulic control Center drives the propelling piston and the central canal towards propulsion end end cap to oil-feed in the anchored end toroidal cavity One side shifting;
The central canal is included by the propelling piston of second actuation mechanism, the hydraulic control center and first actuation mechanism Propelling piston be separated to form first paragraph, second segment, the 3rd section and the 4th section;
The two ends of the propelling piston are respectively provided with the first groove and the second groove, and first groove is towards the anchored end end Lid, second groove is towards propulsion end end cap;In first groove and the second groove of second actuation mechanism respectively The first paragraph and the second segment are fixedly connected, are fixed in first groove and the second groove of first actuation mechanism respectively Connect described 3rd section and described 4th section;
The pipe passage of insertion, an anchored end hydraulic pressure are set between the bottom land of the bottom land of first groove and second groove Passage penetrates into the end face at the first groove place end of the propelling piston, a propulsion end hydraulic pressure from the bottom land of first groove Passage penetrates into the end face at the second groove place end of the propelling piston from the bottom land of second groove;
The one end of the anchored end hydraulic channel of second actuation mechanism on the bottom land of first groove passes through the first pipeline One end with the anchored end hydraulic channel of first actuation mechanism on the bottom land of first groove connects;Described second makees The one end of propulsion end hydraulic channel on the bottom land of second groove of motivation structure passes through the second pipeline and first start One end connection of the propulsion end hydraulic channel of mechanism on the bottom land of second groove;First pipeline and the second pipe Line is placed in the pipe passage and the central canal.
2. the pressue device of full hydraulic drive down-hole string according to claim 1, it is characterised in that the hydraulic control center Including the first stroke valve, the second stroke valve, main reversing valve and sequence valve;First stroke valve and first actuation mechanism Propulsion end end cap connection, second stroke valve are connected with the propulsion end end cap of second actuation mechanism;
The main reversing valve is connected with the oil-in at the hydraulic control center by main oil inlet pipe road, and the main reversing valve passes through respectively Anchored end toroidal cavity, second actuation mechanism of the first in-line, the second in-line and first actuation mechanism Anchored end toroidal cavity connection;The sequence valve is connected with the main oil inlet pipe road, and the sequence valve is by the main oil-feed The pressure signal of pipeline controls the conducting between the main reversing valve and the oil return opening at the hydraulic control center;Lived by the propulsion Plug hydraulic control center described with the contact of propulsion end end cap controls the triggering of first stroke valve or second stroke valve.
3. the pressue device of full hydraulic drive down-hole string according to claim 1, it is characterised in that the anchoring assembly Including slide the anchor arm support ring being sleeved on the central canal, at least three anchor arms that can be radially expanded or shrink, Slide block and anchoring piston;The anchor arm support ring is located at the end that the anchoring assembly exposes to the part of the hydraulic cylinder, One end of the anchor arm is fixed in the anchor arm support ring, and its other end is fixed on the anchored end end cap;
The anchoring piston is sleeved on the central canal, and one end of the anchoring piston is slidably and sealingly placed in the hydraulic cylinder It is interior;The anchor arm is distributed along the even circumferential of the central canal, and the slide block is located in the cavity that the anchor arm is surrounded, institute State slide block to be sleeved on the anchoring piston;The anchoring piston is promoted towards institute by the oil-feed of the anchored end toroidal cavity The motion of anchored end end cap is stated, the anchoring piston promotes the periphery of the slide block, the slide block to extrude the anchor arm radially Expansion.
4. the pressue device of full hydraulic drive down-hole string according to claim 3, it is characterised in that the anchoring piston Including sleeve part and the piston portion for being fixedly set in described sleeve part one end, the piston portion is slidably and sealingly placed in the hydraulic pressure In cylinder;Step is set on the outer wall of the sleeve part, the slide block can slide along the outer wall of the sleeve part until with described The horizontal plane of rank against.
5. the pressue device of full hydraulic drive down-hole string according to claim 4, it is characterised in that the anchoring piston Upper pocketed springs, the two ends of the spring are born against in the inner side of the piston portion and the anchored end end cap.
6. the pressue device of full hydraulic drive down-hole string according to claim 3, it is characterised in that the slide block it is outer At least one clinohedral is set on wall, and the clinohedral includes multiple inclined-planes that the even circumferential along the slide block is distributed, described Inclined-plane towards the anchor arm support ring inclined from one end to the slide block;The inclined-plane is towards the anchor arm The motion of pushing out ring extrudes the anchor arm, and the anchor arm is radially expanded and anchored with the extraneous borehole wall.
7. the pressue device of full hydraulic drive down-hole string according to claim 6, it is characterised in that the clinohedral Quantity is at least one, has three inclined-planes in the clinohedral, and the inclined-plane is along the distribution position of the circumference of the slide block Put corresponding along the distributing position of the circumference of the central canal with the anchor arm.
8. the pressue device of full hydraulic drive down-hole string according to claim 6, it is characterised in that on the anchor arm Roller is set, and the roller can be rolled on the inclined-plane.
9. the pressue device of full hydraulic drive down-hole string according to claim 1, it is characterised in that in the second segment On the outer wall of the part for exposing to the hydraulic cylinder of second actuation mechanism or second actuation mechanism hydraulic cylinder inwall Upper setting locating part, the locating part limit the propelling piston of second actuation mechanism and move in the corresponding hydraulic cylinder Position.
10. a kind of propulsion method of full hydraulic drive down-hole string, it is characterised in that using described in any one of claim 1 to 9 Full hydraulic drive down-hole string pressue device, its course of work is as follows:
S10, before the full hydraulic drive down-hole string pressue device enters well, to the first actuation mechanism propulsion end toroidal cavity and The propulsion end toroidal cavity of the second actuation mechanism is filled with hydraulic oil;By the full hydraulic drive down-hole string pressue device and center Pipe is lowered into down-hole together;
S20, hydraulic control center control hydraulic oil enter the anchored end toroidal cavity of first actuation mechanism, and described first makees motivation The anchoring assembly tensioning anchoring of structure, the pressure of the anchored end toroidal cavity of first actuation mechanism reach limit value, and described the The anchored end toroidal cavity of one actuation mechanism promotes corresponding propelling piston to drive the central canal direction being fixedly connected thereon The propulsion end end cap motion of first actuation mechanism;
Hydraulic oil in the propulsion end toroidal cavity of first actuation mechanism flows into second actuation mechanism by pipeline Propulsion end toroidal cavity, the hydraulic cylinder of second actuation mechanism are transported towards first actuation mechanism relative to the central canal It is dynamic;
S30, the hydraulic control center control hydraulic oil enter the anchored end toroidal cavity of second actuation mechanism, and described second makees The anchoring assembly tensioning anchoring of motivation structure, the pressure of the anchored end toroidal cavity of second actuation mechanism reach limit value;Together When, the anchored end toroidal cavity release of first actuation mechanism, the anchoring assembly retracted for clearance of first actuation mechanism;Institute The anchored end toroidal cavity for stating the second actuation mechanism promotes corresponding propelling piston to drive the central canal being fixedly connected thereon Towards the propulsion end end cap motion of second actuation mechanism;
S40, is repeated in above-mentioned S20 and S30, and the central canal is continued towards propulsion end end cap propulsion.
The propulsion method of 11. full hydraulic drive down-hole strings according to claim 10, it is characterised in that in the S20, The pressure of the anchored end toroidal cavity of first actuation mechanism reaches the limit value of the sequence valve setting at the hydraulic control center, institute State sequence valve conducting;The propelling piston of first actuation mechanism is moved to and is connect with the propulsion end end cap of first actuation mechanism Touch, trigger first stroke valve being connected with the propulsion end end cap of first actuation mechanism at the hydraulic control center, the hydraulic control The main reversing valve commutation at center, the main reversing valve control the flow direction of hydraulic oil, and the sequence valve resets;
In the S30, the pressure of the anchored end toroidal cavity of second actuation mechanism reaches the restriction of the sequence valve setting Value, the sequence valve conducting;The propelling piston of second actuation mechanism moves to the propulsion end with second actuation mechanism End cap is contacted, and triggers second stroke valve being connected with the propulsion end end cap of second actuation mechanism at the hydraulic control center, institute Main reversing valve commutation is stated, the sequence valve resets.
CN201410775595.8A 2014-12-15 2014-12-15 The pressue device and its propulsion method of full hydraulic drive down-hole string Active CN104533315B (en)

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CA2861177C (en) * 2012-02-13 2016-04-19 Richard T. Hay Piston tractor system for use in subterranean wells
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