CN104963624B - A kind of circumferential impactor of shunting hydraulic oscillation - Google Patents

Abstract

The invention relates to a split-flow hydraulic oscillation circumferential impactor. The double-female jet generators of the split-flow hydraulic oscillation circumferential impactor are placed in the joint of the shell, and the hydraulic hammer is installed on the upper part of the transmission short. The device and the gland are located between the double-female jet generator and the hydraulic hammer, and the transmission short is screwed into the lower end of the shell joint and pressed against the gland; the inner wall of the shell joint has an annular groove and a discharge channel, and the annular groove and the double The liquid return outlet on the outer wall of the female jet generator is set correspondingly, and the transmission short is provided with a drainage hole; the double female jet generator is a cylindrical body with a central flow channel, and the stopper separates the central flow channel into two left and right shunt channels. The inlet and outlet of the pressure feedback channel inside the double female jet generator are connected with the central flow channel; the flow divider divides each flow channel into two parts, the hydraulic hammer has a symmetrical arc-shaped boss, and the arc-shaped cavity accommodates the arc-shaped Boss. The invention has no weak parts, long service life and good impact effect.

Description

A Split Type Hydraulic Oscillating Circumferential Impactor

technical field

The invention relates to a drilling tool used in medium-hard to hard formations in the petroleum industry, in particular to a split-flow hydraulic oscillation circumferential impactor.

Background technique

Driven by the two factors of increasing scarcity of oil resources and sharp increase in demand, the exploration and development of the new area continues to expand, the depth of oil production wells continues to deepen, the formations encountered are becoming more and more complex, the loss of power along the way is large, and the liquid column is on the well. The holding effect of the bottom is obvious, the drilling speed is slow, and the tools are easily damaged, which leads to a longer drilling cycle and higher drilling costs, which seriously restrict the development process of oil and gas fields. Therefore, increasing the penetration rate of deep wells and ultra-deep wells is an urgent need for oilfields at home and abroad.

At present, various impactors are the main downhole power tools to improve the ROP of deep wells. However, conventional impactors used in the field in China often form vulnerable and weak parts due to more connections and moving parts, and there is a problem of short life. At the same time, most of the drill bits used in medium and deep wells are PDC drill bits. Due to the stick-slip vibration generated during rock breaking, PDC drill bits often fail prematurely. Therefore, it is imminent to develop new tools that can solve the above problems.

Contents of the invention

The object of the present invention is to provide a split-flow hydraulic oscillating circumferential impactor, which is used to solve the problems of short life and poor impact effect of conventional impactors due to connections and many moving parts.

The technical solution adopted by the present invention to solve the technical problem is: the shunt type hydraulic oscillating circumferential impactor includes a shell joint, a double-female jet generator, a flow divider, a gland, a hydraulic hammer, and a transmission short; The generator is pushed into the shell joint, the hydraulic hammer is installed on the upper part of the transmission short, the flow divider and the gland are located between the double female jet generator and the hydraulic hammer, the transmission short is screwed into the lower end of the shell joint and pressed against the pressure Cover; the inner wall of the shell joint has an annular groove and a discharge channel, the annular groove is set corresponding to the liquid return outlet on the outer wall of the double female jet generator, the discharge channel is located under the annular groove and communicated, and the transmission short is provided with Drainage hole, one end of the drainage hole communicates with the lower end of the discharge channel, and the other end of the drainage hole communicates with the inner cavity of the transmission short circuit; the double-female jet generator is a cylindrical body with a central flow channel, and the central flow channel communicates with the inner cavity of the shell joint. The block is located at the bottom of the central flow channel, and divides the central flow channel into two left and right sub-runners. There is a liquid return outlet on the outside of the pressure feedback channel, the inlet and outlet of each pressure feedback channel are connected with the central flow channel, one end of each liquid return outlet is connected with the central flow channel, and the other end of each liquid return outlet is set They are all on the outer wall of the double-female jet generator; the flow divider is also provided with two split channels, which are two second split channels, and the upper ends of the two second split channels are respectively connected to the two first split channels of the double-female jet generator. The splitter divides each second flow channel into two parts. The gland has four diversion holes communicating with the splitter respectively. The hydraulic hammer has a symmetrical arc-shaped boss. The arc-shaped cavity of the boss and the four diversion holes of the gland correspond to the four side walls of the arc-shaped cavity respectively.

In the above scheme, the lower end of the transmission short-connector is threadedly connected with the drill bit.

In the above scheme, the diverter is composed of a diverter body and a block. There are two diverter channels inside the diverter body, one is a straight channel and the other is an oblique channel. The channel extends to the first diversion groove, and the first diversion groove is symmetrically provided with two diversion holes, and the first diversion groove is respectively connected with the two diversion holes; the block is a cylinder with a ring platform inside, and the block is surrounded by In the lower part of the main body of the flow divider, there is an annular second diversion groove, which is also symmetrically provided with two diversion holes, and the second diversion groove is also respectively connected to the two diversion holes; the gland is an external symmetrical ring The fan-shaped cylinder has four diversion holes of equal volume, and the diversion holes of the flow divider correspond to the diversion holes of the gland one by one.

In the above scheme, the central channel of the double female jet generator is bottle-shaped, the pressure feedback channel is a circular hole, the inlet of the pressure feedback channel is set in the lower part of the bottle close to the corresponding flow channel, and the outlet of the pressure feedback channel is provided with a bottleneck The liquid return outlet is located between the inlet and outlet of the pressure feedback channel, so that the pressure relief effect is good, and the inlet of the pressure feedback channel is located at the bottleneck, which can push the liquid flow to the opposite side of the flow channel more easily.

In the above scheme, the shell joint is a cylindrical hollow body, the upper end of the inner cavity is a female joint to connect with the upper drill string, the middle and lower end is a two-stage contraction form, and the first contraction section is placed with a double female jet generator and a flow divider.

The present invention has the following beneficial effects:

1. The present invention makes full use of the hydraulic energy, so that the drill bit generates circumferential vibration while rotating, and improves the rock-breaking efficiency. At the same time, the circumferential motion also reduces the influence of stick-slip vibration on drilling. The impactor has no intermediate buffer energy storage devices such as hammers and springs, and there is no closing of the valve hole, and there is no weak part, so the service life is long and the impact effect is good.

2. The present invention uses the residual pressure of the drilling fluid to work and does not require additional supplementary energy.

3. The present invention has a simple structure, is easy to realize, and has low cost, and is convenient for popularization and application in oil fields.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a schematic diagram of the cross-sectional structure of the shell joint of the present invention;

Fig. 3 is a schematic diagram of the cross-sectional structure of the dual-female jet generator of the present invention;

Fig. 4 is a structural schematic diagram of a flow divider of the present invention;

Fig. 5 is a schematic diagram of a cross-sectional structure of a flow divider of the present invention;

Fig. 6 is a schematic diagram of the gland structure of the present invention;

Fig. 7 is a top view of the hydraulic hammer structure of the present invention;

Fig. 8 is a structural schematic diagram of the transmission housing of the present invention.

In the figure: 1. Shell connector; 2. Double female jet generator; 3. Hydraulic hammer; 4. Shunt; 5. Transmission short connection; 6. Drainage hole; 7. Gland; .Discharge channel; 11. Annular groove; 12. Central flow channel; 13. Split channel; 14. Pressure feedback channel inlet; 15. Return liquid outlet; 16. Arc boss; 17. Pressure feedback channel outlet; 18 .Splitter main body; 19. Blocking block; 20. First diversion tank; 21. Second diversion tank; 22. Diversion hole.

detailed description

The present invention is described further below:

This shunt type hydraulic oscillation circumferential impactor includes a shell joint 1, a double female jet generator 2, a flow divider 4, a gland 7, a hydraulic hammer 3, and a transmission short 5; the lower end of the shell joint 1 is screwed into the transmission short 5 , the double-female jet generator 2 is placed in the shell joint 1, the hydraulic hammer 3 is located on the upper part of the transmission short-circuit 5, the flow divider 4 and the gland 7 are located between the double-female jet generator 2 and the hydraulic hammer 3, and the transmission short-circuit 5 is screwed into the lower end of the shell joint 1 and pressed against the gland 7; the inner wall of the shell joint 1 has an annular groove 11 and a discharge channel 10, and the annular groove 11 is connected to the liquid return outlet 15 on the outer wall of the double female jet generator 2 Correspondingly set, the discharge channel 10 is located under the annular groove 11 and communicates with each other. The transmission short 5 is provided with a drainage hole 6. One end of the drainage hole 6 communicates with the lower end of the discharge channel 10, and the other end of the drainage hole 6 communicates with the inner cavity of the transmission short 5. communicated, the lower end of the transmission housing is threadedly connected with the drill bit. The flow channel 13 in the lower part of the double female jet generator 2 is aligned with the flow divider 4 to form a liquid downflow channel. The task of dividing the drilling fluid into four strands is completed in the flow divider 4. The hydraulic hammer 3 cooperates with the transmission short-circuit 5 to pass through the liquid The impulsive force reciprocatingly rotates the impact transmission short to form circumferential vibration, and finally, the vibration is transmitted to the drill bit through the transmission short 5.

The shell joint 1 is a cylindrical hollow body, the upper end of the inner cavity is a female joint to connect with the upper drill string, the middle and lower end is a two-stage contraction form, and the first contraction section is placed with a double female jet generator 2 and a flow divider 4 . The shell joint 1 is provided with an annular groove 11, so that the liquid flows into the discharge channel 10 smoothly, and then flows into the interior through the drainage hole 6 of the side wall of the transmission short 5, and then flows into the drill bit.

The double female jet generator 2 is a cylindrical body with a central flow channel 12, the central flow channel 12 communicates with the inner cavity of the shell joint 1, the stopper is located at the bottom of the central flow channel 12, and the central flow channel 12 is divided into left and right two by the stopper at the bottom. There is a branch channel 13, and a pressure feedback path is set in the flow channel, and at the same time, there are conductive liquid return outlets 15 on both sides. There are two left and right pressure feedback channels inside the double female jet generator 2, and the outside of each pressure feedback channel is provided with a liquid return outlet 15, and each pressure feedback channel inlet 14 and pressure feedback channel outlet 17 are connected to the central flow channel 12 One end of each liquid return outlet 15 communicates with the central flow channel 12, a groove is formed at the intersection of the side cover and the side column, and the other end of the liquid return outlet 15 is arranged on the side column at the groove.

The central channel 12 of the double female jet generator 2 is bottle-shaped, and the pressure feedback channel is a circular hole. The pressure feedback channel inlet 14 is arranged in the lower part of the bottle close to the corresponding flow channel 13, and the pressure feedback channel outlet 17 is arranged in the neck of the bottle. , the liquid return outlet 15 is located between the pressure feedback channel inlet 14 and the pressure feedback channel outlet 17 .

The flow divider 4 is composed of a flow divider main body 18 and a blocking block 19. The flow divider main body 18 is provided with two flow passages 13, one is a straight flow passage and the other is an oblique flow passage. The two shunt channels of the generator 2 are connected, and there is a first shunt groove 20 at the bottom of the main body 18 of the shunt, and the inclined flow path extends to the first shunt groove 20, and the first shunt groove 20 is symmetrically provided with two diversion holes 22, and the second A splitter groove 20 communicates with the two guide holes 22 respectively; the blocking block 19 is a cylindrical body with an annular platform inside, and the blocking block 19 surrounds the lower part of the diverter main body 18 and forms an annular second splitter groove 21. The second diversion groove 21 is also symmetrically provided with two diversion holes 22 , and the second diversion groove 21 is also respectively connected to the two diversion holes 22 , and the above two pairs of four diversion holes 22 intersect each other. The flow guide holes 22 of the flow divider 4 correspond to the flow guide holes 22 of the gland 7 one by one. When the liquid flows down from one branch of the dual-female jet generator 2, it will pass through the inclined channel, thereby flowing into a pair of symmetrical guide holes 22 corresponding to the gland 7, and when the liquid flows down from the other channel, it will pass through the The straight-through channel cooperates with the internal flow channel of the blocking block 19 to introduce the liquid into a pair of symmetrical guide holes 22 on the other side of the gland 7 .

The gland 7 is a fan-shaped volume cylinder with an external symmetrical ring, and has four diversion holes 22 of equal volume. The four diversion holes 22 communicate with the flow divider 4 respectively. The guide hole 22 flows out, so that the hydraulic hammer 3 is reciprocated clockwise or counterclockwise by the pressure of the liquid.

The hydraulic hammer 3 is a component that can rotate in the circumferential direction. Its shape is a cylinder that cuts off the volume of the symmetrical arc on both sides. In this way, the hydraulic hammer 3 has a symmetrical arc-shaped boss 16, and its arc The height of the shaped boss 16 is slightly lower than that of the central cylinder, and the upper part of the transmission short has an arc-shaped cavity for accommodating the arc-shaped boss. The four guide holes of the gland correspond to the four side walls of the arc-shaped cavity respectively. The liquid enters the two symmetrical side walls of the arc-shaped cavity through two corresponding diversion holes, and pushes the hydraulic hammer to rotate in the opposite direction, so that the hydraulic hammer can swing back and forth in the arc-shaped cavity. That is, when the drilling fluid flows out from a pair of symmetrical diversion holes 22 of the gland 7 and enters the symmetrical closed space formed by the hydraulic hammer 3 and the transmission short 5, it will push the hydraulic hammer 3 to rotate in one direction and impact the transmission. When the 5 wall is shorted, the hydraulic hammer 3 stops rotating, causing the closed space formed by shorting the drive 5 to form a suppressed pressure, and the liquid flows back. The reflux liquid forces the liquid in the dual female jet generator 2 to change the flow path, and flows out from another pair of symmetrical diversion holes 22, pushing the hydraulic hammer 3 to rotate in reverse, and then bumps against the wall, suppresses pressure, feedbacks, and the liquid flow diverts. In this way, the transmission short circuit 5 and then the circumferential vibration of the drill bit are realized.

The transmission short 5 accommodates the hydraulic hammer 3 on the one hand, and plays a transmission role on the other hand: the circumferential vibration generated by the impact of the hydraulic hammer 3 and the torque of the upper drill string are transmitted to the drill bit. The upper part of the transmission short 5 has an arc-shaped cavity 9 for containing the arc-shaped boss 16. When the drilling fluid flows out from the opening, it will flow into the closed space formed by the arc-shaped boss 16 of the hydraulic hammer 3 and the transmission shell to form a suppressed pressure. Promote the circumferential rotation of the hydraulic hammer 3, impact the transmission short-circuit 5, and then drive the drill bit connected below the transmission short-circuit 5 to vibrate.

When the present invention works, the drilling fluid flows into the double-female ejector device 2 from the upper end of the casing joint 1 . Due to the Coanda effect, the drilling fluid will first concentrate on a certain side of the flow channel 13 . Assuming that the liquid is first attached to the wall and output from the left flow channel, after being diverted by the main body of the diverter 18 and the block 19 of the diverter, it passes through the two symmetrical openings in the diversion hole 22 left by the gland 7, and enters the hydraulic fluid. The closed space formed by the hammer 3 and the transmission short-circuit 5 forms a suppressed pressure. The hydraulic hammer 3 rotates to the dead point under the push of the pressure, and hits the transmission short-circuit 5, causing the transmission short-circuit 5 to vibrate in one direction. After moving to the dead point, the pressure in the closed space continues to rise, and the drilling fluid returns along the original flow path, passes through the liquid return flow path of the double female jet generator 2, enters the annular groove 11 of the shell joint 1, enters the discharge channel 10, and passes through The through hole in the side wall of the drive housing flows into the inside of the drill string and then into the drill bit. At the same time, a pressure feedback is formed in the left flow channel, forcing the drilling fluid to adhere to the wall of the double female jet generator 2 right flow channel. The pressure of the liquid in the closed space under the right flow channel is constantly rising, forcing the hydraulic hammer 3 to rotate in the opposite direction, and then the transmission short circuit 5 and the drill bit vibrate in the opposite direction. In the same way as the left flow channel, when the hydraulic hammer 3 rotates to the dead point of the right flow channel, feedback is formed in the right flow channel, so that the drilling fluid is attached to the wall of the left flow channel. Reciprocating in this way, the circumferential reciprocating vibration of the drill bit is realized.

Claims (5)

1. a kind of circumferential impactor of shunting hydraulic oscillation, it is characterised in that：The circumferential impactor bag of this shunting hydraulic oscillation Include housing joint（1）, double female fluidic generators（2）, current divider（4）, gland（7）, Hydro-efflux Hammer（3）, transmission short circuit（5）；Double mothers Fluidic generator（2）Withstand on housing joint（1）It is interior, Hydro-efflux Hammer（3）Installed in transmission short circuit（5）Top, current divider（4）And pressure Lid（7）Positioned at double female fluidic generators（2）And Hydro-efflux Hammer（3）Between, it is driven short circuit（5）Screw in housing joint（1）Lower end simultaneously Withstand on gland（7）On；Housing joint（1）Inwall has annular groove（11）And current by pass（10）, annular groove（11）With it is double Female fluidic generator（2）Liquid outlet is returned on outer wall（15）It is corresponding to set, current by pass（10）Positioned at annular groove（11）Under Face and communicate, be driven short circuit（5）It is provided with conduction hole（6）, conduction hole（6）One end and current by pass（10）Lower end is communicated, and is drawn Discharge orifice（6）The other end and transmission short circuit（5）Inner chamber is communicated；Double female fluidic generators（2）For with center flow channels（12）Cylindricality Body, center flow channels（12）With housing joint（1）Inner chamber is communicated, and block is located at center flow channels（12）Bottom, by center flow channels （12）It is separated into two runners in left and right（13）, the two runners are two the first runners, double female fluidic generators（2）It is interior Portion, which is provided with to be provided with the outside of two pressure feedback channels in left and right, every pressure feedback channel, returns liquid outlet（15）, every pressure The entrance of force feedback passage, export and center flow channels（12）Communicate, each return liquid outlet（15）One end and center flow channels （12）Communicate, each return liquid outlet（15）The other end set in double female fluidic generators（2）On outer wall；Current divider（4） It is provided with two runners（13）, be two the second runners, two the second runner upper ends respectively with double female fluidic generators （2）Two the first runners connect, current divider（4）Each second runner is separated into two parts, gland（7）With respectively With current divider（4）And Hydro-efflux Hammer（3）Four pod apertures communicated（22）, Hydro-efflux Hammer（3）With symmetrical arc boss（16）, pass Dynamic short circuit（5）Top, which has, accommodates arc boss（16）Arc-shaped cavity（9）, gland（7）Four pod apertures（22）Respectively with arc Shape chamber（9）Four side walls it is corresponding.

2. the circumferential impactor of shunting hydraulic oscillation according to claim 1, it is characterised in that：Described transmission short circuit （5）Lower end is connected with drill bit thread.

3. the circumferential impactor of shunting hydraulic oscillation according to claim 2, it is characterised in that：Described current divider（4） By shunt body（18）And sprue（19）Two parts are constituted, shunt body（18）Inside is provided with two runners（13）, one Bar is straight channel, and one is inclined flow passage, shunt body（18）First splitter box is arranged at bottom（20）, inclined flow passage extends to first point Chute（20）, the first splitter box（20）It is symmetrically arranged with two pod apertures（22）, the first splitter box（20）Led respectively with the two Discharge orifice（22）Connection；Sprue（19）For the internal cylinder for carrying annular table, sprue（19）It is looped around shunt body（18）Bottom And form the second splitter box of annular（21）, second splitter box（21）Also two pod apertures are symmetrically arranged with（22）, this second Splitter box（21）Also two pod apertures are respectively communicated with（22）；Gland（7）It is the cylinder of an additional symmetrical ring segment, and has There are the pod apertures of four equal volumes（22）, current divider（4）Pod apertures（22）With gland（7）Pod apertures（22）One a pair Should.

4. the circumferential impactor of shunting hydraulic oscillation according to claim 3, it is characterised in that：Described double female jet hairs Raw device（2）Center flow channels（12）For ampuliform, pressure feedback channel is circular duct, pressure feedback channel entrance（14）Set In bottle middle and lower part close to corresponding runner（13）, pressure feedback channel outlet（17）Bottleneck is provided with, liquid outlet is returned （15）Positioned at pressure feedback channel entrance（14）, pressure feedback channel outlet（17）Between.

5. the circumferential impactor of shunting hydraulic oscillation according to claim 4, it is characterised in that：Described housing joint （1）It is a hollow cylindrical body, inner chamber upper end is female joint, is connected with upper drilling string, middle lower end is two grades of shrink forms, first Contraction section places double female fluidic generators（2）And current divider（4）.