CN205840768U - Area change is utilized to realize the drilling tool of impact of collision - Google Patents

Abstract

The utility model relates to a drilling tool which utilizes area change to realize longitudinal impact. The technical solution is: the spline sleeve, the upper sleeve, the upper joint, the middle joint, the lower sleeve, and the lower joint are sequentially connected by threads, and after being fixed, a cavity is formed inside, and the cavity is the spline mandrel from top to bottom, Disc spring, row pipe, dead end nut, anti-drop cap, anti-drop short joint, turbine shaft, rotating valve plate, ball roller, stationary valve plate; the splined mandrel and splined sleeve are connected by splines; The disc spring is fixed between the spline mandrel and the row pipe, and cooperates with the shoulder of the upper sleeve; the upper end of the row pipe is threaded with the spline mandrel, and the lower end is threaded with the stop nut; the upper end of the rotating valve plate is connected with the turbine short Joint threaded connection, the lower end and the stationary valve plate are matched by end face ball rollers; the stationary valve plate is interference fit with the shoulder of the lower sleeve. The utility model utilizes the area change to realize periodic longitudinal impact, which can reduce the friction between the drill string and the well wall, and improve the drilling efficiency.

Description

A Drilling Tool Using Area Variations to Realize Longitudinal Percussion

technical field

The invention relates to a drilling tool used in the field of oil and gas drilling engineering, which utilizes a turbine to drive the internal structure to rotate, generates pressure pulses through changes in the mud flow area, and realizes longitudinal impact.

Background technique

With the rapid development of the oil industry, people's demand for oil is increasing day by day. Due to the gradual depletion of shallow oil and gas resources, drilling is developing in the direction of high recovery and cost saving. Horizontal wells and extended-reach wells have a larger drainage area than vertical wells, and can solve the drilling of some special working conditions and oil layers, improve oil and gas recovery, and are more and more widely used in oilfield development. However, during the drilling process of horizontal wells and extended-reach wells, the drill string will produce large friction and drag in the well section with large borehole curvature or too long horizontal section, which will affect the drilling performance and efficiency. Large frictional resistance and drag pressure not only seriously affect the ROP of horizontal wells, but also may cause downhole accidents such as stick-slip and stuck pipe. How to reduce the friction between the drill string and the well wall and improve the drilling efficiency has always been a difficult problem in the development of drilling tools.

During the drilling of directional wells and horizontal wells, sliding drilling is usually used to change the direction of the wellbore, increase and decrease the inclination. However, this drilling method makes the friction between the drilling tool and the well wall mostly static friction, which causes stick-slip and dragging of the drill string. At present, the effective way to solve such problems is to make the drilling tool subject to periodic longitudinal vibration shocks during the drilling process, and convert the static friction between it and the well wall into dynamic friction, thereby reducing the friction force and improving the pressure-on-bit. transfer efficiency.

Contents of the invention

In order to explore and solve the phenomenon of high frictional resistance and drag pressure described in the background technology, and convert the static friction suffered by the bottom hole drilling tool into dynamic friction, the present invention provides a drilling tool that utilizes area change to realize longitudinal impact. The drilling tool of the present invention uses the drilling flushing fluid (mud) as the power medium, and utilizes the energy of the high-pressure liquid flow to drive the turbine to rotate. The rotating valve plate is driven by the turbine to generate rotational motion, and the through-hole area of the valve plate changes periodically with that of the stationary valve plate, thereby generating longitudinal pressure pulses, which will be transmitted to both sides of the drill tool, and the upward longitudinal vibration will make the flower The key sleeve and the upper sleeve move upward as a whole. Since the spline mandrel is relatively fixed, the disc spring stuck between the spline mandrel and the exhaust pipe will be compressed, and the changing pressure pulse will force the disc spring to continuously tighten, so that the whole Drilling tools can generate periodic reciprocating longitudinal vibrations to reduce friction and improve drilling efficiency.

The technical solution of the present invention is: a drilling tool that utilizes area changes to realize longitudinal impact, and is characterized in that: the spline sleeve, upper sleeve, upper joint, middle joint, lower sleeve, and lower joint are sequentially connected by threads, and the inner part is formed after being fixed. Cavity, from top to bottom, the cavity is splined mandrel, disc spring, exhaust pipe, dead end nut, anti-drop cap, anti-drop nipple, turbine shaft, rotating valve plate, ball roller, stationary valve plate ;The splined mandrel and the splined sleeve are connected by a spline; the disc spring is stuck between the splined mandrel and the row pipe, and cooperates with the shoulder of the upper sleeve; the upper end of the row pipe is threadedly connected with the splined mandrel, The lower end is threadedly connected with the stop nut; the upper end of the anti-fall nipple is threaded with the anti-drop cap, and the lower end is threaded with the turbine shaft; the support ring has 12 through holes evenly distributed in the circumferential direction, the outer surface of which is threaded with the middle joint, and the inner hole is connected with the anti-drop The sub-joint is coaxially matched; the upper cock is evenly distributed with 12 through holes in the circumferential direction; the upper cock and the lower cock are respectively threaded with the lower sleeve to fix the turbine stator; the turbine rotor and the turbine shaft are connected by splines; the lower end of the turbine shaft is connected to the turbine sub-section Threaded connection; the upper end of the rotating valve plate and the turbine nipple are threaded to fix the adjusting gasket, and the lower end is matched with the stationary valve plate through the end face of the ball roller; the stationary valve plate is interference fit with the shoulder of the lower sleeve; in addition, the splined mandrel A spline lip seal and a guide ring are provided between the spline sleeve and a locking ring and a wear-resistant ring in the spline groove of the spline mandrel; a piston and a piston lip seal are provided between the row pipe and the piston sleeve. The beneficial effects of the present invention are: (1) the downhole tool of this invention utilizes area change to realize longitudinal impact, the static friction between the drilling tool and the borehole wall will be dynamic friction, thereby reducing the frictional force suffered by the drilling tool and improving the drilling efficiency. efficiency. (2) Use the turbine to drive the rotating valve plate, so that the mud passes through the change of the flow area between the rotating valve plate and the stationary valve plate to produce longitudinal vibration, and cooperate with the disc spring to jointly push the drilling tool to produce periodic reciprocating motion. The structure is simple and effective. The energy utilization rate is improved; (3) When used in conjunction with other tools, it can effectively control and increase the drilling speed of the drill bit and prolong the service life of the drill tool.

Description of drawings

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

Fig. 2 is the sectional view of A-A face among Fig. 1 of the present invention;

Fig. 3 is the sectional view of B-B face among Fig. 1 of the present invention;

In the figure 1-spline mandrel, 2-spline lip seal, 3-guide ring, 4-spline sleeve, 5-upper sleeve, 6-lock ring, 7-wear ring, 8-disc spring, 9-pipe, 10-piston sleeve, 11-piston, 12-piston lip seal, 13-end nut, 14-top joint, 15-middle joint, 16-anti-drop cap, 17-anti-drop short joint, 18-lower sleeve, 19-support ring, 20-upper cock, 21-turbine shaft, 22-turbine stator, 23-turbine rotor, 24-lower cock, 25-turbine nipple, 26-adjusting gasket, 27- Rotating valve plate, 28-ball roller, 29-stationary valve plate, 30-lower joint.

detailed description

The present invention will be further described below in conjunction with accompanying drawing:

Referring to accompanying drawing 1, the drilling tool utilizing area change to realize longitudinal impact is characterized in that: the spline sleeve 4, the upper sleeve 5, the upper joint 14, the middle joint 15, the lower sleeve 18, and the lower joint 30 are sequentially threaded, After being fixed, a cavity is formed inside, and the cavity is sequentially splined mandrel 1, disc spring 8, row pipe 9, stop nut 13, anti-drop cap 16, anti-drop short joint 17, turbine shaft 21, Rotating valve plate 27, ball roller 28, and stationary valve plate 29; the splined mandrel 1 and the splined sleeve 4 are connected by a spline; the disc spring 8 is stuck between the splined mandrel 1 and the exhaust pipe 9, and Cooperate with the shaft shoulder of the upper sleeve 5; the upper end of the row pipe 9 is threaded with the spline mandrel 1, and the lower end is threaded with the stop nut 13; the upper end of the anti-drop joint 17 is threaded with the anti-drop cap 16, and the lower end is connected with the turbine shaft 21 threaded connection; supporting ring 19 has 12 through holes evenly distributed in the circumferential direction, its outer surface is threaded with the middle joint 15, and the inner hole is coaxially matched with the anti-drop joint 17; the upper cock 20 has 12 through holes evenly distributed in the circumferential direction; The lower cock 24 is threadedly connected with the lower sleeve 18 respectively, the fixed turbine stator 22, the turbine rotor 23 and the turbine shaft 21 are connected by splines; the lower end of the turbine shaft 21 is threaded with the turbine nipple 25; The adjusting gasket 26 is fixed through threaded connection, and the lower end cooperates with the stationary valve plate 29 through the end surface of the ball roller 28; the stationary valve plate 29 is in interference fit with the lower sleeve 18 shaft shoulder; in addition, the spline mandrel 1 and the spline sleeve 4 A spline lip seal 2 and a guide ring 3 are arranged between them; a locking ring 6 and a wear-resistant ring 7 are arranged in the spline groove of the spline mandrel 1; a piston 11 and a piston lip seal12.

During operation, the mud enters the cavity of the lower sleeve 18 through the splined mandrel 4, the row pipe 9, the anti-dropping cap 16, the upper joint 14, the middle joint 15, the support ring 19, and the upper cock 20 to drive the turbine to rotate. The rotating valve plate 27 is driven by the turbine to generate rotational motion, and the through-hole area of the valve plate 29 and the stationary valve plate 29 produce periodic changes, thereby generating longitudinal pressure pulses, which will be transmitted to both sides of the drill tool, and the longitudinal vibration transmitted upwards Make the spline sleeve 4 and the upper sleeve 5 move upward as a whole. Since the spline mandrel 1 is relatively fixed, the disc spring 8 stuck between the spline mandrel 1 and the row pipe 9 will be compressed, and the constantly changing pressure pulse The disc spring 8 is forced to be continuously tightened, so that the entire drilling tool can produce periodic reciprocating longitudinal vibrations.

Claims (3)

1. A drilling tool that uses area change to achieve longitudinal impact, consisting of a splined mandrel (1), a splined lip seal (2), a guide ring (3), a splined sleeve (4), an upper sleeve (5), a lock Tight ring (6), wear ring (7), disc spring (8), exhaust pipe (9), piston sleeve (10), piston (11), piston lip seal (12), stop nut (13) , upper joint (14), middle joint (15), anti-drop cap (16), anti-drop nipple (17), lower sleeve (18), support ring (19), upper cock (20), turbine shaft ( 21), turbine stator (22), turbine rotor (23), lower cock (24), turbine nipple (25), adjusting gasket (26), rotating valve plate (27), ball roller (28), stationary Valve plate (29), composed of lower joint (30), is characterized in that: spline sleeve (4), upper sleeve (5), upper joint (14), middle joint (15), lower sleeve (18), The lower joint (30) is threaded in turn, and after being fixed, a cavity is formed inside, and the cavity is followed by a splined mandrel (1), a disc spring (8), a row pipe (9), and a stop nut ( 13), anti-drop cap (16), anti-drop nipple (17), turbine shaft (21), rotating valve plate (27), ball roller (28), stationary valve plate (29); spline mandrel ( 1) The splined sleeve (4) is connected by a spline; the disc spring (8) is stuck between the splined mandrel (1) and the row pipe (9), and cooperates with the shoulder of the upper sleeve (5) ;The upper end of the row pipe (9) is threadedly connected with the spline mandrel (1), and the lower end is threadedly connected with the stop nut (13); The turbine shaft (21) is threaded; the support ring (19) has 12 through holes evenly distributed in the circumferential direction, and its outer surface is threaded with the middle joint (15), and the inner hole is coaxially matched with the anti-drop nipple (17); the upper cock (20 ) with 12 through holes evenly distributed in the circumferential direction; the upper cock (20) and the lower cock (24) are threadedly connected with the lower sleeve (18) to fix the turbine stator (22); the turbine rotor (23) and the turbine shaft (21) adopt flowers keyed connection; the lower end of the turbine shaft (21) is threaded to the turbine nipple (25); the upper end of the rotating valve plate (27) is threaded to the turbine nipple (25) to fix the adjusting gasket (26), and the lower end is connected to the stationary valve plate ( 29) Fit through the end face of the ball roller (28); interference fit between the stationary valve plate (29) and the shoulder of the lower sleeve (18); in addition, the spline mandrel (1) and the spline sleeve (4) are set There are spline lip seals (2) and guide rings (3); locking rings (6) and wear-resistant rings (7) are provided in the spline grooves of the spline mandrel (1); the row pipe (9) and the piston sleeve A piston (11) and a piston lip seal (12) are arranged between (10). 2. The drilling tool utilizing area change to realize longitudinal impact according to claim 1, characterized in that: the rotating valve plate (27) is uniformly distributed with 12 through holes with a diameter of 16mm in the circumferential direction; the stationary valve plate (29) is uniformly distributed circumferentially. Cloth 12 diameters are the through holes of 18mm; Rotating valve plate (27) lower end face and static valve plate (29) upper end face are provided with annular groove, can rotate freely by ball roller (28), reduce the friction of contact end face. 3. The drilling tool for realizing longitudinal impact by area change according to claim 1, characterized in that: the rotating valve plate (27) generates rotational motion under the drive of the turbine, and its through hole area is the same as that of the stationary valve plate (29). ) produces periodic changes in the through hole area, thereby generating longitudinal pressure pulses, which will be transmitted to both sides of the drilling tool, and the longitudinal vibration transmitted upwards will make the spline sleeve (4) and the upper sleeve (5) move upward as a whole. The key mandrel (1) is relatively fixed, and the disc spring (8) stuck between the spline mandrel (1) and the exhaust pipe (9) will be compressed, and the constantly changing pressure pulse forces the disc spring (8) to tighten continuously , so that the entire drilling tool can produce periodic reciprocating longitudinal vibration.