CN2125688U - Displacement control diameter-changing stabilizer - Google Patents

Abstract

The utility model relates to a displacement control diameter-changing stabilizer which is formed by serially connecting three parts, namely a signal transformation mechanism, a signal transmission mechanism and an operating mechanism. A piston and an upper limited sleeve are installed in an outer sleeve of the signal transformation mechanism, the piston and the upper limited sleeve are moved down by the mud pressure, and are reset by the spring of the outer sleeve. The signal transmission mechanism is composed of an extension rod which is connected with the piston, an upper pressing sleeve which is firmly sleeved with the extension rod and a lower pressing sleeve which is connected with a main shaft and which is connected with the extension rod piston; the upper and lower pressing sleeves both can move along the axial direction of an inner sliding sleeve of the outer sleeve of the transmission mechanism. An outer casing of the operating mechanism is connected with the outer sleeve of the transmission mechanism. The direction of the main shaft is provided with a plurality of ring grooves, and there is a space between each two ring grooves; the circumferential direction of the outer casing of the operating mechanism corresponding to each ring groove is provided with a plurality of telescopic small plunger pistons; when the main shaft reciprocates under the function of the signal transmission mechanism, the small plunger piston can extend or withdraw in order to achieve the purpose of changing the outer diameter of the stabilizer.

Description

Displacement control diameter-changing stabilizer

The utility model relates to a kind of drilling equipment, particularly a kind of be serially connected with among the drilling tool, with the discharge capacity control type variable stabilizer of borehole pump discharge capacity as control signal.

In drilling engineering, the number of the stabilizer configuration of bottom hole assemblies, the position, and whether very big to the properties influence of bottom hole assemblies outer radius variable is, adopt different stabilizer configurations, drilling tool is produced increase material, drop angle and holding assembly effect, adjust configuration within the specific limits, can also change the ability power of above-mentioned three classes combination to a certain extent, but, traditional stabilizer structurally is nonadjustable, once inserting drilling assembly, its combined characteristic is then fixing can not to be changed, when its characteristic and actual the requirement when inconsistent, then cause borehole track to take place, even cause and miss the target than large deviation.Boring to pull out of hole changes drilling assembly, but makes a trip and caused the cost increase, and drilling period is long, causes easily to be hampered and to block, and this is especially outstanding to deep-well.Particularly can the external diameter of stabilizer change, the meaning that the quality of drilling well is had particular importance, because a stabilizer external diameter section after increasing such as a fulcrum in the same major axis that is rotating, cancel it or increase it or change all can the acquire change purpose of drill bit probing track of its combination support position.

The purpose of this utility model just is to overcome the above-mentioned shortcoming and defect of existing in prior technology, and provide a kind of with the borehole pump mud displacement as control signal, be provided with the discharge capacity control type tapered stabilizer of the telescopic plunger that can change the stabilizer external diameter.

The purpose of this utility model is to realize by following technical scheme, it is made of signal conversion, signal transmission and executing agency's three parts serial connection, is equipped with in the signal switching mechanism overcoat by mud pressure and moves down piston and upper limit cover with the spring reset of outer cover; The last gland that signal transmission mechanism then overlaps admittedly by the extension bar that links to each other with piston and with extension bar be connected with main shaft and constitute with the following gland of extension bar kink, gland all can be mobile vertically along the inner sliding sleeve of transmission mechanism overcoat up and down; The shell of executing agency is connected with the transmission mechanism overcoat, main shaft to spaced apart be provided with several annular groove, with the corresponding executing agency of each annular groove shell circumferentially be provided with the telescopic small plunger of array, when main shaft moves up and down under the signal transmission mechanism effect, small plunger then stretches out or retraction, to reach the purpose that changes the stabilizer external diameter.

Therefore: effect of the present utility model is significant,

1. pump slurry in the hollow drilling tool endoporus owing to borehole pump, drill bit bore outflow and the annular space through between the drilling tool and the borehole wall by foot is back in the mud pit on top then, so its cyclic process is a continous-stable stream, and borehole pump itself is a displacement machine, so, be the borehole pump discharge capacity practicable as control signal, mud as the control medium that acts on piston top.

2. by changing the drilling well pump delivery, can reach the purpose that changes the active force that acts on piston top, thereby piston is moved down or reset, and make executing agency's synchronization action of main shaft section, thereby it is convenient to have control, reliable operation and characteristics by transmission mechanism.

3. the ingenious setting of the gland up and down of signal transmission mechanism and sliding sleeve makes executing agency have three stations in upper, middle and lower vertically, and the external diameter that has guaranteed stabilizer has improved the quality and the efficient of drilling well by the actual needs that actual needs changes flexibly.Also have the characteristics that reduce cost simultaneously.

Concrete structure of the present utility model is to be realized by following accompanying drawing and embodiment:

Fig. 1 is a working state schematic representation of the present utility model.

Fig. 2 is the structure sectional view of conversion of the utility model signal and transmission mechanism part.

Fig. 3 is the structure sectional view of the utility model executing agency part.

Fig. 4 is and the corresponding duty sectional view of Fig. 2.

Fig. 5 is and the corresponding duty sectional view of Fig. 3.

Fig. 6 is the A_A section sectional view of Fig. 4.

Fig. 7 is the B-B section sectional view of Fig. 3.

Structure of the present utility model is carried out the explanation of detail below in conjunction with accompanying drawing 1-7:

The utility model is changed by signal, signal transmission and signal are carried out three parts and are connected in series vertically and constitute and be serially connected among the drilling tool, be movably installed with the piston 4 of cavity in the signal conversion overcoat 1, be set with the flow nipple 2 that acts on mutually with mud in the piston 4 epimere endoporus, piston 4 outer covers successively are placed with upper spring 6 and upper limit cover 5, be set with a sliding sleeve 11 that has a sliding muscle 11A in the overcoat 8 of the signal transmission mechanism that is connected with signal switching mechanism overcoat 1 hypomere, in sliding sleeve 11, be installed with the solid cover of extension bar 12 on gland 9 be connected with main shaft 15 and with the following gland 10 of extension bar 12 kinks, last gland 9, the draw-in groove 23 that offers interactional inclined-plane 14 on the end face of following gland 10 and sliding muscle 11A and fasten, extension bar 12 is connected with piston 4 hypomeres, executing agency's shell 16 is connected with transmission mechanism overcoat 8 hypomeres, the cavity main shaft 15 of movable sets axially spaced do not have several annular groove 15A in executing agency's shell 16, circumferentially the interval evagination has several straight muscle 16A in executing agency's shell 16 periphery wall upper edges, along every intrinsic axially spaced-apart of straight muscle 16A be provided with fasten with annular groove 15A or deviate from and outside the array small plunger 18 visited, main shaft 15 hypomeres are visited and are stretched in continuous adapter sleeve 26 endoporus of executing agency's shell 16 hypomeres, main shaft 15 hypomeres are placed with lower spring 21 and lower limit cover 22 according to cover outward, put the sieve plate 20 that connects with well and shell 16 inner chambers in executing agency's shell 16 perisporiums.Referring to Fig. 2 to Fig. 7

Architectural feature of the present utility model also is:

Piston 4 upper end edges radially evagination have a protruding dish 4A, the reduced diameter section of protruding dish 4A bottom is with upper spring 6 and upper limit cover 5 outward, following the sitting up straight of upper spring 6 and upper limit cover 5 is placed on blue 7 tops of coiling of going up that interlock in transmission mechanism overcoat 8 stage casings, at sliding sleeve 11 lower surface blocks one locating ring 13 that twist to connect mutually with transmission mechanism overcoat 8 endoporus is arranged, the quantity of the annular groove 15A that main shaft 15 cylindrical upper edge axially spaced-aparts are offered is 3 to 6 roads, the upper limb face of each road annular groove 15A is the conical ring face, its lower edge face is horizontal anchor ring, every vertical straight muscle 16A of executing agency's shell 16 peripheries axially offers identical with annular groove 15A road number and corresponding one by one array hole 16B, in each hole 16B arranged outside the baffle plate 17 that links to each other with wall is arranged, the reduced diameter section of the small plunger 18 of baffle plate 17 inboards is with spring 19 outward, the medial segment of small plunger 18 be large diameter frustum and with the moving supporting dress of hole 16B.Cover is placed with lower spring 21 and lower limit cover 22 successively outside the reduced diameter section 15B of main shaft 15 hypomeres, lower spring 21 and lower limit cover are sat up straight for 22 times and are placed on sealing shroud 25 upper surfaces, have one to twist the positioning disk 24 that connects with the sealing shroud 25 bottom roof pressures of main shaft hypomere reduced diameter section 15B cylindrical movable set, circumferentially be provided with seal 3 what the seal section 15C of sealing shroud 25, piston protruding dish 4A and main shaft 15 epimeres contacted with adjacent each part with executing agency's shell 16 endoporus.Referring to Fig. 1 to Fig. 7

Architectural feature of the present utility model also is:

Upper limit cover 5 and lower limit are overlapped between the horizontal anchor ring of lower edge of the last annular groove 15A of 22 upper ring surfaces on protruding 4A of coiling of the piston that moves and main shaft 15 all a compression stroke section 27, last gland 9 and following gland 10 endoporus offer twice and the evagination cunning muscle 11A sliding sliding recess that matches vertically, the lower surface side of last gland 9 and following gland 10 contacted corresponding end face sides and sliding sleeve 11 is provided with the inclined-plane 14 greater than the self-locking angle, and the large cone section of each small plunger 18 axially offers the groove 18A of indent.Referring to Fig. 2 and Fig. 4

Architectural feature of the present utility model also is:

The large cone section tapering of valve piston 18 equates with the upper limb conical ring face cone degree of annular groove 15A, the outer end of the reduced diameter section of valve piston 18 is a sphere, its spherical radius equals 1/2 of drilling bit diameter, be embedded with the sieve plate 20 more than at least 1 on executing agency's shell 16 walls, with corresponding each the group small plunger 18 of per pass annular groove 15A all circumferentially uniformly at intervals and be radial along executing agency's shell 16.Referring to Fig. 5 and Fig. 7

Describe below in conjunction with 2 to 5 pairs of operating principles of the present utility model of accompanying drawing:

In drill string discharge capacity be operate as normal discharge capacity Q(or less than Q) time, the piston 4 of discharge capacity control type tapered stabilizer signal switching mechanism is in upper under the effect of upper spring 6; This moment supposition down gland 10 and main shaft 15 all be in upper, be the state that lower spring 21 resets it; Plunger 18 contracts in resetting under spring 19 effects, and tapered stabilizer is in the path state.Referring to Fig. 2 and Fig. 3

Pass through to adjust discharge capacity at rig floor, making the borehole pump total displacement is Qc(Qc＞Q), because throttling 2 the effect of chewing causes pressure drop △ P, mud pressure forces piston 4 descending, driving connecting rod 12 and last gland 9 moves down along sliding muscle in the sliding sleeve 11, during to rated travel, then owing to 5 effects of upper limit cover stop to move down.Referring to Fig. 4

The last gland 9 that moves down promotes down, and gland 10 moves down with the main shaft 15 that is attached thereto, cause gland grooves on two sides down is stuck in the sliding muscle 11A, down gland and main shaft only move axially and do not have a rotation in the LAP of beginning, instantly gland 10 under continuing under 9 effects of last gland, move away sliding muscle 11A to until on gland 9 because of spacing this section stroke that stops to move down in, the effect on contravention inclined-plane 14 because two glands join, make down gland 10 and main shaft 15 stop to move down and produce circumferential rotation, promptly press down cover and turn over an angle together with main shaft, the gland end face is blocked by sliding muscle 11A end face, at this moment, main shaft is in the next.

Cancel control discharge capacity signal Qc, when becoming normal discharge capacity Q, compressed upper spring 6 forces piston 4 to reset, and main shaft 15 and following gland 10 move under the effect of compressed lower spring 21 and reset, because gland 10 end faces produce under the effect on the spring 21 and the inclined-plane 14 that contacts with sliding muscle end face and circumferentially trackslip down, till down the draw-in groove 23 of gland 10 snapped in the sliding muscle 11A end face outside of evagination, this moment, time gland and main shaft were locked and be in the meta state.Referring to Fig. 4

In above-mentioned following gland and main shaft folding process, plunger 18 is scraped the Fan fasten hide or leather on mace of discussing and is stirred the maximum gauge state because of the step conical surface effect that is subjected to spindle collar connected in star 15A begins overhanging coloured silk, referring to Fig. 4 and Fig. 5, when main shaft 15 goes upward to meta, small plunger 18 is overhanging always, because the loop concave support is arranged, so imposing on the pressure of plunger 18, the borehole wall can not make its withdrawal, so can realize the pin position, as desire to make small plunger 18 to withdraw, can send out control discharge capacity Qc again, make piston 4 descending, when coming downwards to certain stroke, last gland 9 pushes down down gland 10, it is descending to make it to promote main shaft, gland 10 rotates and breaks away from sliding muscle 11A release under this moment, promptly descend the internal concave hopper chute of gland 10 to turn to the embedded location that aligns with the sliding muscle 11A of evagination just, but gland 9 is gone back ejection and down gland 10 and main shaft 15 on this moment, so plunger 18 still is in overhanging state, after cancelling control discharge capacity Qc, last gland is up, and the groove of following gland also enters sliding muscle, and lower spring power forces main shaft and following gland up along sliding muscle, when moving on to plunger 18 correspondence positions on the annular groove 15A on the main shaft, small plunger 18 is withdrawn into original state in resetting simultaneously under the effect of plunger spring 19.Referring to Fig. 2 and Fig. 3

Above-mentioned discharge capacity control type tapered stabilizer has been formed the pipe nipple about a 2m, can be connected on the position that needs to change diameter on the drill string.As near-bit stabilizer, can control diameter and become big, diminish, be equivalent to insert or the cancellation near-bit stabilizer, thereby make drilling assembly become increasing hole angle or drop angle combination, reach the adjustment characteristic, the purpose of control borehole track.Also can be connected on other positions of drilling assembly.This has wide practical value in directional well, cluster well and horizontal well.

Deep-well is crept into, discharge capacity control type tapered stabilizer also is very essential, in current deep drilling, on the one hand stabilizer must be installed on the drill string assembly, on the other hand, stabilizer has potential risks again, and this is because meeting the eye on every side stabilizer causes easily and be hampered and bit freezing, and the probability that the dark more this accident of well takes place is just big more.If adopt discharge capacity control type tapered stabilizer, can rise, put this stabilizer when boring down in the path state, therefore avoided taking place the possibility of this accident.

The characteristic that only never need rise, brill can be controlled bottom hole assemblies down, Controlling Borehole Trajectory accurately and easily, improve the wellbore quality and the success rate that hits, shorten drilling well non-cutting time, reduce make a trip number of times and risk and saving drilling cost aspects, adopt the utility model, have important techniques meaning and remarkable economic efficiency.

Claims (4)

1, discharge capacity control type tapered stabilizer, it is characterized in that: change by signal, signal transmission and signal are carried out three parts and are connected in series vertically and constitute and be serially connected among the drilling tool, be movably installed with the piston 4 of cavity in the signal conversion overcoat 1, be set with the flow nipple 2 that acts on mutually with mud in the piston 4 epimere endoporus, piston 4 outer covers successively are placed with upper spring 6 and upper limit cover 5, be set with a sliding sleeve 11 that has a sliding muscle 11A in the overcoat 8 of the signal transmission mechanism that is connected with signal switching mechanism overcoat 1 hypomere, in sliding sleeve 11, be installed with the solid cover of extension bar 12 on gland 9 be connected with main shaft 15 and with the following gland 10 of extension bar 12 kinks, last gland 9, the draw-in groove 23 that offers interactional inclined-plane 14 on the end face of following gland 10 and sliding muscle 11A and fasten, extension bar 12 is connected with piston 4 hypomeres, executing agency's shell 16 is connected with transmission mechanism overcoat 8 hypomeres, the cavity main shaft 15 of movable sets axially spaced do not have several annular groove 15A in executing agency's shell 16, circumferentially the interval evagination has several straight muscle 16A in executing agency's shell 16 periphery wall upper edges, along every intrinsic axially spaced-apart of straight muscle 16A be provided with fasten with annular groove 15A or deviate from and outside the array small plunger 18 visited, main shaft 15 hypomeres are visited and are stretched in continuous adapter sleeve 26 endoporus of executing agency's shell 16 hypomeres, main shaft 15 hypomeres are placed with lower spring 21 and lower limit cover 22 according to cover outward, put the sieve plate 20 that connects with well and shell 16 inner chambers in executing agency's shell 16 perisporiums.

2, according to the described discharge capacity control type of claim 1 tapered stabilizer, it is characterized in that: piston 4 upper end edges radially evagination have a protruding dish 4A, the reduced diameter section of protruding dish 4A bottom is with upper spring 6 and upper limit cover 5 outward, following the sitting up straight of upper spring 6 and upper limit cover 5 is placed on blue 7 tops of coiling of going up that interlock in transmission mechanism overcoat 8 stage casings, at sliding sleeve 11 lower surface blocks one locating ring 13 that twist to connect mutually with transmission mechanism overcoat 8 endoporus is arranged, the quantity of the annular groove 15A that main shaft 15 cylindrical upper edge axially spaced-aparts are offered is 3 to 6 roads, the upper limb face of each road annular groove 15A is the conical ring face, its lower edge face is horizontal anchor ring, every vertical straight muscle 16A of executing agency's shell 16 peripheries axially offers identical with annular groove 15A road number and corresponding one by one array hole 16B, in each hole 16B arranged outside the baffle plate 17 that links to each other with wall is arranged, the reduced diameter section of the small plunger 18 of baffle plate 17 inboards is with spring 19 outward, the medial segment of small plunger 18 be large diameter frustum and with the moving supporting dress of hole 16B, the reduced diameter section 15B of main shaft 15 hypomeres overlaps successively outward and is placed with lower spring 21 and lower limit cover 22, lower spring 21 and lower limit cover are sat up straight for 22 times and are placed on sealing shroud 25 upper surfaces, have one to twist the positioning disk 24 that connects with the sealing shroud 25 bottom roof pressures of main shaft hypomere reduced diameter section 15B cylindrical movable set, at sealing shroud 25 with executing agency's shell 16 endoporus, the seal section 15C of the protruding dish of piston 4A and main shaft 15 epimeres contacts with adjacent each part circumferentially is provided with seal 3.

3, according to claim 1 or 2 described discharge capacity control type tapered stabilizers, it is characterized in that: upper limit cover 5 and lower limit are overlapped between the horizontal anchor ring of lower edge of the last annular groove 15A of 22 upper ring surfaces on protruding 4A of coiling of the piston that moves and main shaft 15 all a compression stroke section 27, last gland 9 and following gland 10 endoporus offer twice and the evagination cunning muscle 11A sliding sliding recess that matches vertically, the lower surface side of last gland 9 and following gland 10 contacted corresponding end face sides and sliding sleeve 11 is provided with the inclined-plane 14 greater than the self-locking angle, and the large cone section of each small plunger 18 axially offers the groove 18A of indent.

4, according to the described discharge capacity control type of claim 3 tapered stabilizer, it is characterized in that: the large cone section tapering of valve piston 18 equates with the upper limb conical ring face cone degree of annular groove 15A, the outer end of the reduced diameter section of valve piston 18 is a sphere, its spherical radius equals 1/2 of drilling bit diameter, be embedded with the sieve plate 20 more than at least 1 on executing agency's shell 16 walls, with corresponding each the group small plunger 18 of per pass annular groove 15A all circumferentially uniformly at intervals and be radial along executing agency's shell 16.

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