CN210049819U - Small borehole circumferential impact generating device for coiled tubing drilling - Google Patents

Abstract

The utility model belongs to the technical field of oil and gas exploration and development coiled tubing drilling, especially, relate to a slim hole circumference strikes generating device for coiled tubing drilling, its characterized in that includes the lower clutch, cup joint the combination hammer block in this lower clutch hole, cup joint outside this combination hammer block and with lower clutch sliding connection's top connection, connect the body that hangs of lower clutch and top connection, the combination hammer block includes the screen pipe, the suit is the vice hammer outside this screen pipe, the suit is the main hammer outside this vice hammer, the suit is outside the screen pipe and the water conservancy diversion cap of restriction vice hammer and main hammer axial displacement. The utility model provides the high durability of drill bit has prolonged the life-span of drill bit, increases the reliability of whole coiled tubing, has eliminated because the harm that the stick-slip brought, has reduced the torsion oscillation on the coiled tubing tubular column, has reduced recoil torsion.

Description

Small borehole circumferential impact generating device for coiled tubing drilling

Technical Field

The utility model belongs to the technical field of oil and gas exploration and development coiled tubing drilling, especially, relate to a slim hole circumference strikes generating device for coiled tubing drilling.

Background

The coiled tubing drilling technology has the advantages of low cost, high efficiency, high safety and reliability and the like, is widely applied abroad in recent years, and obtains good economic benefit; at present, the application of coiled tubing drilling sites is not precedent in China, and the coiled tubing drilling sites are only limited in the field of well repairing operation. Unlike conventional rotary drilling, the non-rotatable nature of coiled tubing dictates that the drilling process must be accomplished with special downhole tools, which is one of the primary reasons that restrict the development of coiled tubing drilling in the country. On the basis of analyzing the characteristics and the composition of the coiled tubing drilling tool, compared with the advantages and the disadvantages of different types of tools and the current development situation at home and abroad, a new proposal for introducing the latest conventional drilling tool development idea into the domestic coiled tubing drilling tool is provided, and certain reference significance is provided for the application and the popularization of the domestic coiled tubing drilling technology. Currently, the directional drilling of a two-port open hole side-drilling section is successfully implemented in the great wall drilling of the continuous pipe drilling, and the main problem reflected by the fact that the footage is slow when drilling hard and hard formations. The main reason is that the single cone bit and the coiled tubing are seriously twisted under the influence of the reaction torque of the bit and the power drilling tool, and the phenomena of underground friction and stick-slip of the tubing are particularly prominent due to the increase of the contact area of the tubing and the stratum, so that the development of the coiled tubing drilling technology is seriously restricted by the phenomena.

At present, the torsional impact tool is a high-efficiency auxiliary rock breaking tool based on a PDC drill bit shearing mechanism. When the PDC drill bit works, the internal pendulum bob is driven by drilling fluid to do reciprocating knocking motion, so that high-frequency torsional impact acting force is provided for the PDC drill bit. The torsional impact tool can obviously solve the inherent problem of jamming and slipping of the PDC drill bit and improve the mechanical drilling speed; the torsional vibration of a drill column is relieved, the drilling process is stabilized, the working conditions of drilling tools such as an underground instrument, a drill bit and the like are improved, the service life of the drilling tool is prolonged, and the drilling time efficiency is improved.

As coiled tubing drilling is affected by the strength of a tubular body, the current domestic technology is only applied to drilling of small boreholes of 4-3/4 'and 6', while the torque impact tool only solves the drilling of large boreholes of more than 8-1/2 'and 9-1/2', and according to the point, the improvement and development of a small borehole circumferential impact generating device for coiled tubing drilling suitable for small borehole drilling application becomes urgent and necessary.

Disclosure of Invention

The utility model aims at providing a slim hole circumference strikes generating device for coiled tubing drilling that is fit for slim hole drilling to use, prolongs the drill bit life-span, eliminates because the harm that the stick-slip brought.

The purpose of the utility model is realized by the following technical scheme:

the utility model discloses a slim hole circumferential impact generating device for coiled tubing drilling, which is characterized by comprising a lower joint, a combined hammer body sleeved in an inner hole of the lower joint, an upper joint sleeved outside the combined hammer body and connected with the lower joint in a sliding way, and a suspension body connected with the lower joint and the upper joint, wherein the combined hammer body comprises a sieve tube, an auxiliary hammer sleeved outside the sieve tube, a main hammer sleeved outside the auxiliary hammer, and a diversion cap sleeved outside the sieve tube and used for limiting the axial movement of the auxiliary hammer and the main hammer,

the auxiliary hammer is provided with an auxiliary hammer discharge hole, an auxiliary hammer left side flow passage and an auxiliary hammer right side flow passage,

the main hammer is provided with a main hammer discharge hole, a main hammer left side flow passage and a main hammer right side flow passage,

six reverse spiral grooves capable of generating a rotational flow effect are distributed on the sieve tube.

The suspension body is fixed in the threaded hole of the upper joint through a jackscrew.

The utility model has the advantages that:

(1) the utility model discloses a slim hole circumference strikes generating device for coiled tubing drilling has improved the durability of drill bit and has prolonged the life-span of drill bit, increases the reliability of whole coiled tubing, has eliminated the harm that brings because stick-slip, has reduced the torsion oscillation on the coiled tubing string, has reduced recoil torsion;

(2) the utility model discloses a slim hole circumference strikes generating device for coiled tubing drilling has greatly increased the rate of penetration of drill bit at harder stratum, increases the rate of penetration more than 30% to provide the impact force of the torsion of extra even stable high frequency upwards, help improving the PDC drill bit and cut the stratum, reduced slippage, stuck brill phenomenon;

(3) the utility model discloses a slim hole circumference is strikeed generating device for coiled tubing drilling, pure mechanical structure, no rubber component, no electronic component can not cause extra influence after becoming invalid, creeps into and still can go on, has eliminated error and trouble that produce when directional well operation;

(4) the utility model discloses a slim hole circumference strikes generating device for coiled tubing drilling can be accelerated in the oil reservoir, uses the protection oil reservoir that can be better in the oil reservoir, and the trip number of times that significantly reduces saves huge cost and well drilling time.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a view a-a of fig. 1 according to the present invention.

Fig. 3 is a view B-B of fig. 1 according to the present invention.

Fig. 4 is a view of fig. 1 from C-C according to the present invention.

Fig. 5 is a schematic diagram of the left runner of the main hammer connected to the auxiliary hammer after the main hammer is positively impacted (reversely impacted).

Fig. 6 is a schematic view of the right side flow passage of the main hammer communicated after the auxiliary hammer is positively impacted (reversely impacted).

Fig. 7 is a schematic diagram of the right runner of the main hammer connected to the auxiliary hammer after counterblow (clockwise).

Fig. 8 is a schematic diagram of the flow passage on the left side of the main hammer communicated after the secondary hammer strikes (clockwise) in the reverse direction.

Detailed Description

The following further describes the embodiments of the present invention with reference to the drawings.

As shown in fig. 1-8, the utility model discloses a slim hole circumferential impact generating device for coiled tubing drilling, which is characterized in that comprises a lower joint 1, a combined hammer body sleeved in the inner hole of the lower joint 1, an upper joint 2 sleeved outside the combined hammer body and slidably connected with the lower joint 1, a suspension body 3 connecting the lower joint 1 and the upper joint 2, wherein the combined hammer body comprises a screen pipe 5, an auxiliary hammer 6 sleeved outside the screen pipe 5, a main hammer 7 sleeved outside the auxiliary hammer 6, a deflector cap 8 sleeved outside the screen pipe 5 and limiting the axial movement of the auxiliary hammer 6 and the main hammer 7, and the combined hammer body is limited by the upper joint 2 and prevented from axial movement;

the auxiliary hammer 6 is provided with an auxiliary hammer discharge hole 10, an auxiliary hammer left side runner 9 and an auxiliary hammer right side runner 11,

the main hammer 7 is provided with a main hammer discharge hole 12, a main hammer left side runner 13 and a main hammer right side runner 14,

six reverse spiral grooves capable of generating a rotational flow effect are distributed on the sieve tube 5.

The suspension body 3 is fixed in the threaded hole of the upper joint 2 through the jackscrew 4, and the jackscrew 4 plays a role in limiting and fixing and prevents the suspension body 3 from being exposed.

The utility model discloses a slim hole circumferential impact generating device for coiled tubing drilling, lower joint 1, upper joint 2, sieve tube 5, auxiliary hammer 6, main hammer 7, deflector cap 8 are all in metal sealed sliding fit with each other; the lower joint 1 and the upper joint 2 are limited, fixed and connected by the suspension body 3 through the inner and outer ball grooves; the lower joint 1 and the upper joint 2 can rotate forward and backward slightly in the radial direction through the self-ridge structure and transmit torque; the setting of overall structure forms radial pneumatic cylinder structure in the instrument is inside, under the operating mode that has the drilling fluid to flow, accomplishes circumference and assaults the emergence process. The drilling fluid flows into the main hammer 7 from the upper end of the upper connector 2 through the flow guide cap 8 and is secondarily distributed into the auxiliary hammer 6, the main hammer 7 and the auxiliary hammer 6 in the tool assembly are mutually reversed due to the huge energy from the drilling fluid, the generated mechanical impact energy is intensively and uniformly transmitted to the PDC drill bit through the driving shaft of the lower connector 1, the continuous and stable high-frequency impact torque can reach 600-1200 times/minute, two forces are applied to the PDC drill bit at the moment, one force is the torque provided by the power drilling tool, the other force is the circumferential force provided inside the tool assembly, the force is directly transmitted to the PDC drill bit, no effect is generated on a continuous pipe, the stick-slip phenomenon of the PDC drill bit and the continuous pipe is greatly reduced, the drilling speed is greatly improved, and the service life of the PDC drill bit is prolonged.

The utility model discloses improve the mechanical drilling speed when guaranteeing well bore quality, the phenomenon of the one or more vibrations that probably appear when having eliminated the drill bit motion in the pit makes the moment of torsion of whole coiled tubing remain stable and balanced, converts the fluid energy of drilling fluid to turning round to, high frequency, even stable mechanical impact energy and direct transmission for the PDC drill bit ingeniously, makes drill bit and shaft bottom remain the continuity throughout.

The utility model improves the durability of the drill bit and prolongs the service life of the drill bit in the actual operation, increases the reliability of the whole coiled tubing, eliminates the harm caused by stick slip, reduces the torsion oscillation on the coiled tubing string and the recoil torsion; the mechanical drilling speed of the bit on a harder rock stratum is greatly increased by more than 30%, and an additional uniform and stable high-frequency upward torsional impact force is provided, so that the PDC bit is improved to shear the rock stratum, and the phenomena of slippage and sticking are reduced; the utility model belongs to a pure mechanical structure, has no rubber element and no electronic element, can not cause additional influence after failure, can still drill, and eliminates errors and faults generated during the operation of a directional well; the speed can be increased in the oil layer, the oil layer can be better protected when the oil layer is used, the tripping times are greatly reduced, and the huge cost and the drilling time are saved.

Claims (2)

1. A slim hole circumferential impact generating device for coiled tubing drilling is characterized by comprising a lower joint, a combined hammer body sleeved in an inner hole of the lower joint, an upper joint sleeved outside the combined hammer body and connected with the lower joint in a sliding manner, and a suspension body connected with the lower joint and the upper joint, wherein the combined hammer body comprises a sieve tube, an auxiliary hammer sleeved outside the sieve tube, a main hammer sleeved outside the auxiliary hammer, and a guide cap sleeved outside the sieve tube and used for limiting the auxiliary hammer and the main hammer to move axially,

the auxiliary hammer is provided with an auxiliary hammer discharge hole, an auxiliary hammer left side flow passage and an auxiliary hammer right side flow passage,

the main hammer is provided with a main hammer discharge hole, a main hammer left side flow passage and a main hammer right side flow passage,

six reverse spiral grooves capable of generating a rotational flow effect are distributed on the sieve tube.

2. The slim hole circumferential shock generating apparatus for coiled tubing drilling as claimed in claim 1, wherein said suspension body is fixed in the threaded hole of said upper joint by a jackscrew.

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