CN203559791U

CN203559791U - Shaft bottom negative-pressure upward-movement nozzle PDC drill

Info

Publication number: CN203559791U
Application number: CN201320718480.6U
Authority: CN
Inventors: 杨永印; 曹刚
Original assignee: SHANDONG GUOYUE DIAMOND PRODUCT CO Ltd
Current assignee: SHANDONG GUOYUE DIAMOND PRODUCT CO Ltd
Priority date: 2013-11-14
Filing date: 2013-11-14
Publication date: 2014-04-23
Anticipated expiration: 2023-11-14

Abstract

The utility model discloses a shaft bottom negative-pressure upward-movement nozzle PDC drill. The shaft bottom negative-pressure upward-movement nozzle PDC drill comprises a PDC drill body, a knife wing and a plurality of common water channels, wherein the knife wing is arranged on the PDC drill body, the common water channels are arranged inside the PDC drill body, and water outlets of the common water channels are provided with nozzles. The shaft bottom negative-pressure upward-movement nozzle PDC drill is characterized in that an upward-movement water channel composed of a lower water channel, an elbow and an upper water channel is further arranged inside the PDC drill body, the lower water channel is connected with the elbow which is connected with the upper water channel, an water outlet of the upper water channel is provided with an upward-movement nozzle, and each nozzle and the upper upward-movement nozzle are arranged in the reverse directions. According to the shaft bottom negative-pressure upward-movement nozzle PDC drill, the water outlet direction of the PDC drill body is changed by arranging the upward-movement water channel and the upward-movement nozzle, and the common water channels and the nozzle structures are consistent with an existing PDC drill. Under the condition of common drilling pumping pressure, the upward-movement speed of rock detritus is increased, well wall falling blocks are prevented from being located on the PDC drill body, secondary breaking and abrasion conducted on the rock detritus and the well wall falling blocks by the PDC drill body are reduced, mechanical drilling speed is increased, and service life is prolonged.

Description

In the negative pressure of shaft bottom, return nozzle PDC drill bit

Technical field

The utility model belongs to oil, geological drill bit device field, is specifically related to return in the negative pressure of a kind of shaft bottom nozzle PDC drill bit.

Background technology

At present in Process of Oil Well Drilling, no matter with rock bit or PDC drill bit, all to clean bit face by mud or water conservancy and make the clean not mud drum of drill bit, but burying under injection conditions, with hydraulic pressure, landwaste is washed to shaft bottom, various injection methods are all subject to the restriction of pump pressure, overhigh pumping pressure slush pump and drilling tool easily wash out, affect rate of penetration and downhole safety, for example, high-pressure jet drilling.

The patent No. is that 201220610777.6 Chinese patent discloses a kind of helical blade spiral-flow type runner drill bit, the water of this drill bit ejection can form rotating fluid, the angle that rotating fluid and formation rock form has a shearing force to rock, shearing force strips down rock under high-pressure fluid effect from rock mass, thereby the effect that realizes detritus and clean drill bit, but this drill bit is bad to returning effect on landwaste.

Utility model content

For solving the problems of the technologies described above, the purpose of this utility model is: provide on a kind of landwaste, return effective, bit wear is little, return nozzle PDC drill bit in the shaft bottom negative pressure of long service life.

The utility model is that the technical scheme that its technical problem of solution is taked is:

In the negative pressure of described shaft bottom, return nozzle PDC drill bit, comprise PDC drill bit, be arranged on wing on PDC drill bit and a plurality of common watercourses of PDC drill bit internal, common watercourse water outlet is provided with nozzle, PDC drill bit internal is also provided with and returns water channel, above returns water channel by sewer, and elbow and water-supply line form, sewer connecting bend, elbow connects water-supply line, and water-supply line water outlet is provided with and returns nozzle, nozzle with on return nozzle and arrange in the other direction.

On described in the utility model, return water channel and on return arranging of nozzle and changed the water (flow) direction on PDC drill bit, water outlet opposite direction with PDC bit nozzle on common watercourse, common watercourse and nozzle arrangements are consistent with existing PDC drill bit, in routine, creep under pump pressure condition, on return water channel and on return nozzle setting can accelerate the upward velocity of landwaste and stop well wall dropping block to rest on PDC drill bit, reduce PDC drill bit to the second-time breakage of landwaste and well wall dropping block and wearing and tearing, improved rate of penetration and the application life of creeping into.

On described, return water channel arrange a plurality of, operated by rotary motion 1-2, other water channels are common watercourse, when reducing the mechanical separator speed that landwaste and well wall dropping block creep into the wearing and tearing of PDC drill bit, raising, take into account the saving of material and technique, make rational use of resources.

On described, return water channel and on to return nozzle be carbide alloy, Cemented Carbide Hardness is high, wear-resisting, returns water channel and nozzle abrasion resistance on can increasing, and improves the application life of PDC drill bit.

On described, return water channel with on return nozzle and have three kinds of production methods:

Method one, on PDC drill bit internal and wing, get through hole, in formation, return water channel, the position that PDC drill bit docks with wing on return water channel delivery port, at the upper water channel delivery port that returns, with screw tap, make internal thread, then by return nozzle and be screwed in and return water channel water outlet, on guaranteeing, return water channel and above return the sealing between nozzle, also can sealing ring be set in both junctions.

Method two, on PDC drill bit internal and wing, get through hole, by skin be coated with carbide alloy on return water channel and on return nozzle and adopt Welding, then both are adopted again in the through hole of Welding on PDC drill bit internal and wing, soldering can fill return water channel, on return the space between nozzle and through hole and make scolder and the counterdiffusion of mother metal phase, in assurance, return water channel and above return sealing effectiveness between nozzle and on return water channel and above return the fastness of nozzle.

Method three, on PDC drill bit internal and wing, get through hole, utilize with no pressure carve the method for soaking by skin be coated with carbide alloy on return nozzle and on return water channel and pack graphite core rod into, and insert in the through hole on PDC drill bit internal and wing, then between gap, fill tungsten carbide jolt ramming, again with casting after Mn copper-nickel alloy fusing, this kind of method also can realize return water channel with above return sealing effectiveness between nozzle and on return water channel and above return fixing of nozzle.

On return water channel and also can take other attainable methods with the setting of above returning nozzle, be not limited to above three kinds.

Compared with prior art, the utlity model has following beneficial effect:

On the utility model PDC drill bit, return water (flow) direction and other nozzle opposite directions of nozzle ejection, at the bottom of utilizing water conservancy to improve landwaste upward velocity, clear well, make shaft bottom produce hydraulic pressure a little less than head of liquid, on return nozzle ejection hydraulic pressure landwaste peeled off to PDC drill bit, on return water jet and make landwaste accelerate to be discharged to ground, the cleaning of shaft bottom landwaste is more clean, rapid like this, thus raising mechanical separator speed, alleviate the wearing and tearing to PDC drill bit of landwaste and well wall dropping block, improve the application life of PDC drill bit.

Empirical tests, at Shengli Oil Field 50 1 flat 1 wells that stick together, is used the utility model, hole deviation 86 degree, and well depth 3600～4108m, drilling depth is 580m, is 93.5h during pure brill, rate of penetration is 6.2m/h; Lin Jing 58 1 oblique 7 wells that stick together, are used common PDC drill bit, and drilling depth is 18m, 10h during pure brill, and rate of penetration 1.8m/h, the utility model result of use is quite obvious as can be seen here.

Accompanying drawing explanation

Fig. 1 the utility model sectional view.

In figure: return on 1PDC drill bit, 2 sewers, 3 elbows, 4 water-supply lines, 5 and return water channel, 7 nozzles, 8 common watercourses, 9 wings on nozzle, 6.

The specific embodiment

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

Embodiment 1:

Described in the present embodiment, in the negative pressure of shaft bottom, return nozzle PDC drill bit, comprise PDC drill bit 1, be arranged on wing 9 on PDC drill bit 1 and a plurality of common watercourses 8 of PDC drill bit 1 inside, common watercourse 8 water outlets are provided with nozzle 7, PDC drill bit 1 inside is also provided with returns water channel 6, above returns water channel 6 by sewer 2, and elbow 3 and water-supply line 4 form, sewer 2 connecting bends 3, elbow 3 connects water-supply lines 4, and water-supply line 4 water outlets are provided with and return nozzle 5, nozzle 7 with on return nozzle 5 and arrange in the other direction.

On described in the utility model, return water channel 6 and on return arranging of nozzle 5 and changed the water (flow) direction on PDC drill bit 1, water outlet opposite direction with common watercourse 8 water outlet nozzles 7, common watercourse 8 and nozzle 7 structures are consistent with existing PDC drill bit, in routine, creep under pump pressure condition, on return water channel 6 and on return nozzle 5 setting can accelerate the upward velocity of landwaste and stop well wall dropping block to rest on PDC drill bit, reduce PDC drill bit to the second-time breakage of landwaste and well wall dropping block and wearing and tearing, improved rate of penetration and the application life of creeping into.

On return water channel 6 and have 2, other water channels are common watercourse 8, only draw one in Fig. 1, other omission, on return water channel 6 reducing landwaste and well wall dropping block to when the wearing and tearing of PDC drill bit 1, improving the mechanical separator speed creeping into, take into account the saving of material and technique, make rational use of resources.

On return water channel 6 and on return nozzle 5 outsides and be all coated with carbide alloy, Cemented Carbide Hardness is high, wear-resisting, can increase the crushing effect of PDC drill bit, improves the application life of PDC drill bit 1.

In the present embodiment, on PDC drill bit 1 inside and wing 9, get through hole, in formation, return water channel 6, the position that PDC drill bit 1 docks with wing 9 on return water channel 6 delivery ports, at upper water channel 6 delivery ports that return, go out with screw tap to make internal thread, then by return nozzle 5 and twist to be buckled in and return water channel 6 water outlets, on guaranteeing, return water channel 6 and above return the sealing between nozzle 5, in both junctions, joint ring is set, the alternative material of joint ring is a lot, for example, milling joint ring.

During the present embodiment work, PDC drill bit 1 is by wing 9 rock cuttings, inevitably, in working angles, can produce a large amount of landwaste, common watercourse 8 and nozzle 7 can clean PDC drill bit 1 by jet water course, meanwhile, on return water channel 6 and on return nozzle 5 and also can spray in time current flushing detritus upwards, accelerate smoothly landwaste upward velocity and stop well wall dropping block to fall on PDC drill bit 1, reduce the appearance of PDC drill bit 1 mud drum situation, reduce landwaste and the wearing and tearing of well wall dropping block to PDC drill bit 1, improve rate of penetration and the application life of PDC drill bit 1.

Embodiment 2:

Referring to Fig. 1, the present embodiment is compared with embodiment 1, has changed the set-up mode that above returns water channel 6 and above return nozzle 5.First the present embodiment gets through hole on PDC drill bit 1 inside and wing 9, then skin is coated with carbide alloy on return water channel 6 and on return nozzle 5 and adopt Weldings, finally both are adopted again in the through hole of Welding on PDC drill bit 1 inside and wing 9, soldering can fill return water channel 6, on return the space between nozzle 5 and through hole and make scolder and the counterdiffusion of mother metal phase, in assurance, return water channel 6 and above return sealing effectiveness between nozzle 5 and on return water channel 6 and above return the fastness of nozzle 5.Other structure of the present embodiment is identical with embodiment 1.

Embodiment 3:

The present embodiment is compared with embodiment 1, has changed the set-up mode that above returns water channel 6 and above return nozzle 5.The present embodiment, first on PDC drill bit internal 1 and wing 9, get through hole, then utilize with no pressure carve the method for soaking by skin be coated with carbide alloy on return nozzle 5 and on return water channel 6 and pack graphite core rod into, and insert in the through hole on PDC drill bit internal 1 and wing 9, between gap, fill tungsten carbide jolt ramming, finally with casting after Mn copper-nickel alloy fusing, this kind of method also can realize return water channel 6 with above return sealing effectiveness between nozzle 5 and on return water channel 6 and above return fixing of nozzle 5.

Empirical tests, at Shengli Oil Field 50 1 flat 1 wells that stick together, is used the utility model, hole deviation 86 degree, and well depth 3600～4108m, drilling depth is 580m, during pure brill: 93.5 hours, rate of penetration: 6.2m/h; The Lin Jing 58 1 common PDC drill bits for oblique 7 wells that stick together, drilling depth is 18m, is 10 hours during pure brill, rate of penetration 1.8m/h, the utility model result of use is quite obvious as can be seen here.

Claims

1. in a shaft bottom negative pressure, return nozzle PDC drill bit, comprise PDC drill bit (1), be arranged on wing and the inner a plurality of common watercourses (8) of PDC drill bit (1) on PDC drill bit (1), common watercourse water outlet is provided with nozzle (7), it is characterized in that, PDC drill bit internal is also provided with and returns water channel (6), on return water channel (6) by sewer (2), elbow (3) and water-supply line (4) form, sewer (2) connecting bend (3), elbow (3) connects water-supply line (4), water-supply line (4) water outlet is provided with and returns nozzle (5), nozzle (7) with on return nozzle (5) and arrange in the other direction.

2. in the negative pressure of shaft bottom according to claim 1, return nozzle PDC drill bit, it is characterized in that, return water channel (6) on described to arrange a plurality of.

3. in the negative pressure of shaft bottom according to claim 1 and 2, return nozzle PDC drill bit, it is characterized in that, return on described nozzle (5) and on return water channel (6) outside and be coated with carbide alloy.

4. in the negative pressure of shaft bottom according to claim 3, return nozzle PDC drill bit, it is characterized in that, return on described nozzle (5) with on return between water channel (6) and adopt and be threaded.

5. in the negative pressure of shaft bottom according to claim 4, return nozzle PDC drill bit, it is characterized in that, return on described nozzle (5) with on return water channel (6) junction and be provided with milling joint ring.

6. in the negative pressure of shaft bottom according to claim 3, return nozzle PDC drill bit, it is characterized in that, return on described water channel (6) and on return between nozzle (5) and adopt Welding.

7. in the negative pressure of shaft bottom according to claim 3, return nozzle PDC drill bit, it is characterized in that, return on described water channel (6) and on return nozzle (5) by Welding in PDC drill bit (1) inside.

8. in the negative pressure of shaft bottom according to claim 3, return nozzle PDC drill bit, it is characterized in that, return on described water channel (6) and on return nozzle (5) and adopt graphite core rod to wrap up and be fixed on PDC drill bit (1) inside.