CN2874004Y - Water power pulse drilling tool - Google Patents

Abstract

The utility model relates to a hydraulic pulse drilling tool essentially for improving the drilling speed of drilling machinery in petroleum well drilling, which essentially comprises an upper joint, a suspended disc, an end cap, a flow-dividing guide, an impeller, a shaft, a sleeve, a sealing pressure cover, a rotator, a stator, a body, and a ball bearing. The upper joint and the body are hollow and tubular, connected by threads. The impeller is looped on the shaft and mounted in the inner cavity of the flow-dividing guide. The shaft is fixed on the flow-dividing guide, and suspended on the suspended disc by an end cap. The impeller is connected by a screw with the sleeve. The sleeve is connected with the rotor with a spline. The rotator is connected by a ball bearing. The stator is seated in the inner step of the body. The utility model is connected with a drilling pole at upper, and a drill at lower end. At drilling, partial drilling fluid drives the impeller through the flow-dividing guide and rotates the rotator. The passageway of the rotator and that of the stator are sometimes on sometimes off, so the passageway area changes periodically, and at downstream a hi-pressure pulse jet-flow forms up, which is helpful for improving the drilling speed of a drilling machine.

Description

Hydraulic pulse well drilling equipment

Technical field

The utility model relates to a kind of hydraulic pulse well drilling equipment, belongs in the petroleum industry downhole tool in the drilling well.

Background technology

At present, along with exploration to deep formation development, deep-well is more and more, but along with the increase of well depth, increases along the journey hydraulic loss, shaft bottom drill bit available water horsepower sharply descends, the ability of hydraulic drilling, clear rock weakens thereupon, causes deep drilling speed to descend.Therefore, how to improve shaft bottom hydraulic energy utilization ratio as much as possible, and then raising drilling machinery drilling speed is one of urgent problem that solves.

The drilling well of waterpower pulse formula is to utilize specific instrument to make the continuous stream in the drilling well tubing string change the waterpower pulse jet into, thereby changes the pressure condition of bottom-hole flow field, and then improves a kind of new drilling of rate of penetration.The waterpower pulse jet is different from solid jet, and the periodicity dynamic pressure that it produces has increased the axle center temporary impact pressure of bit nozzle jet, makes the shaft bottom obtain higher energy.Most of rocks are brown and crisp, be difficult for taking place tangible plastic strain, therefore when rock was subjected to high hydraulic pressure compression, most of compression can store in rock, when temporary impact end cycle or unloading, surface hydraulic pressure is removed rapidly, compression in the lithosome can discharge to the surface rapidly, produces expansion in the lithosome, and this expansion impels landwaste to upspring from parent rock, and inside produces tensile stress, generally has only the 2%-10% of its compressive strength when its tensile strength that surpasses rock.When therefore the dynamic pressure of jet is big, caused tensile stress, easily caused the stretching fragmentation of rock to rock.Because the waterpower pulse jet has very high dynamic pressure, causes tensile stress on shaft bottom landwaste (rock), give landwaste one-period stress simultaneously, so dynamic pressure is big more, the bottom hole flushing better effects if, this is elimination or has reduced due to the cuttings hold-down effect of shaft bottom.

The utility model content

The key of carrying out the waterpower pulse drilling well is to utilize specific instrument to make the continuous stream in the drilling well tubing string change pulsing jet into, facts have proved, the mechanical blocking type waterpower pulse jet based on transient hydrodynamics theory produces has bigger superiority.When channel flow when moment opens and closes somewhere, then produce water attack supercharging ripple and step-down ripple in upstream and downstream, this pressure oscillation must act on drill string, produce periodic pressure fluctuation, the additional the pressure of the drill of this pulsation produces the shock loading of alternation to bottom rock, makes the crack propagation of rock, and intensity lowers, help the generation of volumetric fracture, and then help improving rate of penetration.This pressure fluctuation simultaneously also can produce the impact dynamic load of alternation to drill string, thereby reduces the frictional resistance of deep-well, horizontal well, high angle hole, improves rate of penetration.The design formulas of the water attack step-down ripple that waterpower pulse produces in the downstream is: $\mathrm{\Δp}=\mathrm{\Δv}\sqrt{\mathrm{\ρE}},$ This step-down ripple forms pulsating nature negative pressure flow field near the drill bit of shaft bottom, this shaft bottom local pulse negative pressure has reduced the principal normal stress of bottom rock, has improved the force-bearing situation of bottom rock; Reduced cuttings hold-down effect, under the condition of the average rinse water power in same shaft bottom,, thereby made bit speed improve than the clean-up effect that is easier to obtain.The purpose of this utility model just provides a kind of hydraulic pulse well drilling equipment that can produce the waterpower pulse jet.

The utility model mainly comprises top connection, appending disk, end cap, the shunting diverter, impeller, axle, cover, gland, rotor, stator, body, ball bearing, top connection and body are two sections hollow tubular bodies that are processed with screw thread, the chamber body lower end is processed with step, top connection and body connect by screw thread, impeller set is packed on axle and is shunted the diverter inner chamber, axle is fixed on the shunting diverter, and be suspended on the appending disk by end cap, impeller connects by screw thread with cover, cover is connected by spline with rotor, and rotor is connected by ball bearing with stator, and stator is sitting on the interior step of body, gland is a ring bodies, is pressed on the rotor.

The utility model is achieved in that when creeping into, drilling fluid in the drill string enters top connection, during by the shunting diverter, part fluid is by the side down hole of shunting diverter, enter shunting diverter inside, the drives impeller rotation, the cover that impeller connects by the lower end drives the rotor rotation, in rotor when rotation,, the runner above the rotor is during with the runner of stator and when connection and disconnecting, thereby when making the stator fluid downstream and stop, the time and circulate, form periodic waterpower pulse jet another part fluid and pass through, avoided impeller to be blocked the interruption that causes drilling liquid flow in the instrument, reduced the application risk of instrument from the tap hole of shunting diverter.

The utility model proposes to reduce by the waterpower pulse jet breaking strength of " chip hold down effect ", reduction rock based on the Analysis on Mechanism that influences the deep formation bit speed, improves rate of penetration, and adopts the shunting diverter to reduce the risk of tool applications.The utlity model has simple in structure, easy to use, do not influence characteristics such as existing drilling tool structure, for the oil field improve the drilling machinery drilling speed, reducing production costs has important and practical meanings.

Description of drawings

Fig. 1: hydraulic pulse well drilling equipment schematic diagram

1-top connection, 2-appending disk, 3-end cap, 4-shunting diverter, 5-impeller, 6-axle, 7-cover, 8-gland, 9-rotor, 10-stator, 11-body, 12-ball bearing.

The specific embodiment

Now the utility model is further described in conjunction with Figure of description.

The utility model mainly is made up of top connection 1, appending disk 2, end cap 3, shunting diverter 4, impeller 5, axle 6, cover 7, gland 8, rotor 9, stator 10, body 11, ball bearing 12.Top connection 1 and body 11 are two sections hollow tubular bodies that are processed with screw thread, body 11 inner chamber lower ends are processed with step, top connection 1 and body 11 connect by screw thread, appending disk 2 is installed in top connection 1 inner chamber, the center has through hole, be processed with mutually not several through holes of UNICOM around the hole, shunting diverter 4 is a hollow cylinder, the lower end is processed with outer step, outer step upper edge concentric circles has tap hole, inner chamber is processed with the rank of falling from power, and has the side direction through hole under the rank of falling from power, and axle 6 lower ends are processed with outer step, impeller 5 is enclosed within shunting diverter 4 inner chambers of packing on the axle 6, axle 6 is fixed on the shunting diverter 4, and is suspended on the appending disk 2 by end cap 3, and impeller 5 and cover 7 connect by screw thread, cover 7 and rotor 9 are connected by spline, have mutually not several through holes of UNICOM around the center of circle on rotor 9 and the stator 10, rotor 9 is connected by ball bearing 12 with stator 10, and stator 10 is sitting on the interior step of body 11.Gland 8 is ring bodies, is pressed on the rotor 9, and restrict rotor 9 is up and down.

During use, the utility model is connected on the drill bit top, drilling fluid enters top connection through drill string, enter the annular space of shunting diverter and body composition from the through hole of appending disk, wherein a part enters shunting diverter inner chamber through shunting diverter side opening, become radial flow by vertical current and promote the impeller rotation, impeller drives the rotor rotation by the cover of lower end, during the rotor rotation, during the runner of epitrochanterian runner and stator and when connection and disconnecting, thereby produce the waterpower pulse jet in the downstream, another part fluid passes through from the tap hole of shunting diverter, avoid impeller to be blocked the interruption that causes drilling liquid flow in the instrument, reduced the application risk of instrument.This waterpower pulse jet can improve rate of penetration compared to solid jet, reduces drilling cost.

Claims (5)

1, hydraulic pulse well drilling equipment comprises top connection (1), appending disk (2), end cap (3), shunting diverter (4), impeller (5), axle (6), cover (7), gland (8), rotor (9), stator (10), body (11), ball bearing (12), it is characterized in that: top connection (1) and body (11) are two sections hollow tubular bodies that are processed with screw thread, body (11) inner chamber lower end is processed with step, top connection (1) and body (11) connect by screw thread, impeller (5) is enclosed within shunting diverter (4) inner chamber of packing on the axle (6), axle (6) is fixed on the shunting diverter (4), and be suspended on the appending disk (2) by end cap (3), impeller (5) connects by screw thread with cover (7), cover (7) is connected by spline with rotor (9), rotor (9) is connected by ball bearing (12) with stator (10), stator (10) is sitting on the interior step of body (11), gland (8) is a ring bodies, is pressed on the rotor (9).

2, hydraulic pulse well drilling equipment according to claim 1 is characterized in that: rotor (9) upward has mutually not several through holes of UNICOM with stator (10) around the center of circle.

3, hydraulic pulse well drilling equipment according to claim 1 is characterized in that: appending disk (2) center has through hole, is processed with mutually not several through holes of UNICOM around the hole.

4, hydraulic pulse well drilling equipment according to claim 1 is characterized in that: shunting diverter (4) is a hollow cylinder, and the lower end is processed with outer step, and outer step upper edge concentric circles has tap hole, and inner chamber is processed with the rank of falling from power, and has the side direction through hole under the rank of falling from power.

5, hydraulic pulse well drilling equipment according to claim 1 is characterized in that: axle (6) lower end is processed with outer step.

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