CN106948753A - A kind of pulsed drilling fluid hammer - Google Patents

Abstract

The present invention relates to a kind of pulsed drilling fluid hammer of oil and gas industry drilling speed.It solves the problem of deep-well and ultradeep well hard formation drilling are difficult, rate of penetration is low.Its technical scheme is：Top connection upper end and upper drilling string screwed connection, hammer seat lower end and drill bit screwed connection；Screw rod elastomer stator is fixed on stator case inner chamber, and screw rotor inserts screw rod elastomer stator inner chamber；Thrust bearing is arranged on the step in the middle part of flow tube inner chamber；Rotation water cap bottom is cylindrical and coordinates with flow cartridge upper lumen gap；Tup is arranged on flow tube inner chamber bottom；With flow cartridge lower end and hammer seat upper end screwed connection；Screwed connection in the middle part of shell body upper end and the screwed connection of universal shaft housing lower end, shell body lower end and hammer seat.The present invention is provided high frequency axial impact force while transmitting torque, can be effectively improved rate of penetration using drilling fluid driving, has good effect to deep-well and ultra-deep well development.

Description

A pulse drilling hydraulic hammer

technical field

The invention relates to a pulse type drilling hydraulic hammer used for increasing the drilling speed in the petroleum and natural gas industry.

Background technique

In the oil and gas industry, with the acceleration of oil and gas exploration and development at home and abroad, the drilling depth continues to increase. With the depletion of shallow oil and gas resources, drilling engineering is bound to develop in the direction of deep wells and ultra-deep wells. However, the deeper the stratum is, the more complex the geological conditions will be, and the hardness and strength of the deep strata will increase significantly, resulting in increased drilling difficulty for the drill bit, reduced rock breaking efficiency, and greatly reduced ROP. At present, in the development process of deep wells, the conventional rotary drilling technology has phenomena and problems such as gravity accumulation, lateral eddy, longitudinal runout and stick-slip, which makes deep well drilling difficult and the drill bit is seriously damaged.

Rotary percussion drilling technology can greatly increase the drilling speed of deep well drilling. The basic principle is to apply periodic high-frequency axial impact force to the drill bit in the rotary drilling technology. Compared with other drilling techniques, the rotary percussion drilling technology makes full use of the characteristics of high brittleness, low shear strength and impact resistance of hard rock, and can perform rock breaking and cutting work more efficiently. At present, there are very few tools used for rotary drilling at home and abroad, and the development and application of rotary drilling tools have broad prospects.

Contents of the invention

The object of the present invention is to provide a pulse type drilling hydraulic hammer in order to solve the problems of difficult drilling in deep wells and ultra-deep wells in hard formations and low ROP.

In order to achieve the above object, the present invention adopts the following technical solutions: a pulse drilling hydraulic hammer is composed of an upper joint, a stator housing, a screw rubber stator, a screw rotor, a cardan shaft, a cardan shaft housing, a rotating water cap, It is composed of distribution cylinder, thrust bearing, hammer head, spring, outer shell and hammer seat; its structural features are: the upper end of the upper joint is connected with the upper drill string thread, and the lower end of the hammer seat is connected with the drill bit thread; the screw rubber stator is fixed on the stator shell In the inner cavity, the screw rotor is placed in the inner cavity of the screw rubber stator, and the ratio of the number of thread ends between the screw rubber stator and the screw rotor is 2:1; the upper end of the stator housing is connected with the lower end of the upper joint with screws, and the lower end of the stator housing is connected with the cardan shaft housing The upper end of the body is connected with threads; the upper end of the universal shaft is connected with the lower end of the screw rotor with threads, and the lower end of the universal shaft is connected with the upper end of the rotating water cap; three oblique holes are uniformly arranged in the middle of the rotating water cap to connect the inner and outer spaces, and the rotating water cap Two waist-shaped through-holes are evenly arranged in the lower part of the circumference; a circle of steps is set in the middle of the inner cavity of the distribution cylinder, a circle of raised outer edges is arranged on the upper end of the distribution cylinder, and two waist-shaped through-holes are uniformly arranged in the upper part of the distribution cylinder; the thrust bearing is installed On the step in the middle of the inner cavity of the distribution cylinder; the outer circle of the lower part of the rotating water cap is in clearance with the inner cavity of the upper part of the distribution cylinder, the lower end surface of the rotating water cap is in contact with the upper end surface of the thrust bearing, and the waist-shaped through hole in the lower part of the rotating water cap is in contact with the upper part of the distribution cylinder The waist-shaped through hole is axially aligned; a ring of raised steps is set in the middle of the outer circle of the hammer head, four axial grooves are uniformly arranged in the outer circumference of the upper part of the hammer head, and two orthogonal grooves are set on the lower end of the hammer head; the hammer head is installed In the lower part of the inner cavity of the distribution cylinder; the spring is installed on the lower part of the outer circle of the hammer head, and the spring is in a compressed state; the upper part of the inner cavity of the hammer seat is an anvil, and a through hole is set in the center of the anvil, and three oblique holes are uniformly arranged in the middle of the hammer seat to connect the inner and outer spaces. The outer circle of the middle part of the hammer seat is set as a screw; the lower end of the flow distribution cylinder is connected with the upper end of the hammer seat with a thread;

The beneficial effect of the present invention is: (1) the present invention can produce the water hammer pressure of continuous pulse, pushes the hammer head to continuously hammer the hammer seat, and provides continuous axial impact force for the drill bit; (2) the hammer head of the present invention provides The axial impact force can reduce the axial strain of the drill string in the compressed state; (3) the present invention provides high-frequency axial impact force while transmitting the torque, which can effectively improve the ROP; (4) the present invention directly Driven by drilling fluid, the control is simple and reliable; (5) Purely mechanical structure, reliable operation.

Description of drawings

Fig. 1 is a structural schematic diagram of a hammer head of a pulse type drilling hydraulic hammer of the present invention in a downward strike state;

Fig. 2 is a structural schematic diagram of a hammer head of a pulse type drilling hydraulic hammer of the present invention in an upward return state;

Fig. 3 is a cross-sectional view of Fig. 1A-A;

Fig. 4 is a cross-sectional view of Fig. 2B-B;

Fig. 5 is a schematic diagram of a three-dimensional structure of a hammer head of a pulse drilling hydraulic hammer in the present invention;

In the figure: 1. Upper joint, 2. Stator shell, 3. Screw rubber stator, 4. Screw rotor, 5. Cardan shaft, 6. Cardan shaft shell, 7. Rotating water cap, 8. Distribution cylinder, 9. Thrust bearing, 10. Hammer head, 11. Spring, 12. Outer shell, 13. Hammer seat.

detailed description

As shown in Figure 1 and Figure 2, a pulse drilling hydraulic hammer of the present invention is composed of an upper joint 1, a stator housing 2, a screw rubber stator 3, a screw rotor 4, a cardan shaft 5, and a cardan shaft housing 6 , rotating water cap 7, flow distribution cylinder 8, thrust bearing 9, hammer head 10, spring 11, outer shell 12 and hammer seat 13; its structural features are: the upper end of the upper joint 1 is connected with the upper drill string thread, and the hammer seat 13 The lower end is connected with the screw thread of the drill bit; the screw rubber stator 3 is fixed in the inner cavity of the stator housing 2, the screw rotor 4 is placed in the inner cavity of the screw rubber stator 3, and the ratio of the number of thread ends between the screw rubber stator 3 and the screw rotor 4 is 2:1; The upper end of the stator housing 2 is connected with the lower end of the upper joint 1 with screws, the lower end of the stator housing 2 is connected with the upper end of the cardan shaft housing 6 with screws; the upper end of the cardan shaft 5 is connected with the lower end of the screw rotor 4 with screws, and the lower end of the cardan shaft 5 It is connected with the screw on the upper end of the rotating water cap 7; three oblique holes are evenly arranged in the middle of the rotating water cap 7 to connect the inner and outer spaces, as shown in Figure 3 and Figure 4, and two waist-shaped holes are uniformly arranged in the lower part of the rotating water cap 7 in the circumferential direction. hole; the middle part of the inner cavity of the distribution cylinder 8 is provided with a circle of steps, and the upper end of the distribution cylinder 8 is provided with a circle of raised outer edges. The bearing 9 is installed on the step in the middle of the inner cavity of the distribution cylinder 8; the outer circle of the lower part of the rotating water cap 7 and the inner cavity of the upper part of the distribution cylinder 8 are in clearance fit, the lower end surface of the rotating water cap 7 is in contact with the upper end surface of the thrust bearing 9, and the lower part of the rotating water cap 7 The waist-shaped through hole of the valve is axially aligned with the waist-shaped through hole on the upper part of the distribution cylinder 8; the hammer head 10 is installed on the lower part of the inner cavity of the distribution cylinder 8; the spring 11 is installed on the lower part of the outer circle of the hammer head 10, and the spring 11 is in a compressed state; the hammer seat The upper part of the inner cavity of 13 is an anvil, and a through hole is arranged in the center of the anvil, and three oblique holes are evenly arranged in the middle of the hammer seat 13 in the circumferential direction to connect the inner and outer spaces, and the outer circle of the middle part of the hammer seat 13 is set as a screw; the lower end of the flow distribution cylinder 8 and the upper end of the hammer seat 13 are threaded Buckle connection; the upper end of the outer casing 12 is connected with the lower end of the cardan shaft casing 6 with a screw, and the lower end of the outer casing 12 is connected with the middle part of the hammer seat 13 with a screw.

As shown in FIG. 5 , a circle of raised steps is provided in the middle of the outer circle of the hammer head 10 , four axial grooves are uniformly arranged in the outer circumference of the upper part of the hammer head 10 , and two orthogonal grooves are arranged on the lower end surface of the hammer head 10 .

The working principle of a pulse type drilling hydraulic hammer of the present invention is: enter the present invention to the bottom of the well, start the pump to circulate the drilling fluid, the screw rotor 4 drives the rotating water cap 7 to rotate through the cardan shaft 5, and the rotating water cap 7 The drilling fluid flow channel formed between the waist-shaped through hole and the waist-shaped through hole of the distribution cylinder 8 changes periodically, resulting in continuous water hammer pressure fluctuations, thereby periodically pushing the hammer head 10 down the hammer seat 13, each time the hammer head 10 Back up under the effect of spring 11 after hitting.

Claims (4)

1. A pulse type drilling hydraulic hammer is composed of an upper joint (1), a stator housing (2), a screw rubber stator (3), a screw rotor (4), a cardan shaft (5), and a cardan shaft housing (6), rotating water cap (7), distribution tube (8), thrust bearing (9), hammer head (10), spring (11), outer casing (12) and hammer seat (13); It is characterized in that : The upper end of the upper joint (1) is connected with the upper drill string screw, the lower end of the hammer seat (13) is connected with the drill bit screw; the screw rubber stator (3) is fixed in the inner cavity of the stator housing (2), and the screw rotor (4) is placed into the inner cavity of the screw rubber stator (3), the ratio of the molded thread ends of the screw rubber stator (3) to the screw rotor (4) is 2:1; the upper end of the stator housing (2) is connected with the lower end of the upper joint (1) with screws, The lower end of the stator housing (2) is connected with the upper end of the cardan shaft housing (6) with a screw thread; the upper end of the cardan shaft (5) is connected with the lower end of the screw rotor (4) with a screw thread, and the lower end of the cardan shaft (5) is connected with the rotating water cap (7) Threaded connection at the upper end; the thrust bearing (9) is installed on the step in the middle of the inner cavity of the distribution cylinder (8); The lower end surface of the cap (7) is in contact with the upper end surface of the thrust bearing (9), and the waist-shaped through hole on the lower part of the rotating water cap (7) is axially aligned with the waist-shaped through hole on the upper part of the distribution cylinder (8); the hammer head (10) is installed In the lower part of the inner cavity of the distribution cylinder (8); the spring (11) is installed on the lower part of the outer circle of the hammer head (10), and the spring (11) is in a compressed state; the lower end of the distribution cylinder (8) is connected with the upper end of the hammer seat (13) with a screw; The upper end of the outer shell (12) is connected with the lower end of the cardan shaft housing (6) with a screw, and the lower end of the outer shell (12) is connected with the middle part of the hammer seat (13) with a screw. 2. The pulse type drilling hydraulic hammer according to claim 1, characterized in that: a ring of raised steps is set in the middle of the outer circle of the hammer head (10), and four axial axes are evenly arranged in the outer circumference direction of the upper part of the hammer head (10). Groove, two orthogonal grooves are arranged on the lower end surface of the tup (10). 3. The pulse drilling hydraulic hammer according to claim 1, characterized in that: three oblique holes are evenly arranged in the middle of the rotating water cap (7) in the circumferential direction to connect the inner and outer spaces, and the lower part of the rotating water cap (7) is uniform in the circumferential direction. Two waist-shaped through holes are set; a circle of steps is set in the middle of the inner cavity of the flow distribution cylinder (8), a circle of raised outer edges is set on the upper end of the flow distribution cylinder (8), and two waist-shaped through holes are uniformly arranged on the upper part of the flow distribution cylinder (8). hole. 4. The pulse type drilling hydraulic hammer according to claim 1, characterized in that: the upper part of the inner cavity of the hammer seat (13) is an anvil, a through hole is arranged in the center of the anvil, and three holes are uniformly arranged in the middle of the hammer seat (13) The oblique hole communicates with the inner and outer spaces, and the outer circle in the middle part of the hammer seat (13) is set as a screw thread.