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Rock breaking speed-increasing tool with hammer rod reciprocating self-impact structure

A hammer rod and rock breaking technology, applied in the direction of impact drilling, reciprocating drilling rig, drilling equipment, etc., can solve the problems of low drilling efficiency in highly abrasive formations, inability to design multiple punches at the same time, and short life of the drill bit, etc. Achieve the effect of improving rock breaking efficiency, ensuring service life and reducing energy loss

Pending Publication Date: 2018-09-28
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides a rock-breaking speed-up tool with a hammer shaft reciprocating self-impact structure, which has a relatively simple structure for realizing the hammer shaft reciprocating self-impact, and solves the problem that multiple punches cannot be designed at the same time. Therefore, under the premise of low cost, better speed-up efficiency can be obtained, and the problems of low drilling efficiency, short life of the drill bit and high cost of drilling in high-strength and high-abrasive formations can be solved.

Method used

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  • Rock breaking speed-increasing tool with hammer rod reciprocating self-impact structure
  • Rock breaking speed-increasing tool with hammer rod reciprocating self-impact structure
  • Rock breaking speed-increasing tool with hammer rod reciprocating self-impact structure

Examples

Experimental program
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Effect test

Embodiment 1

[0042] In this example, if Figure 1~3As shown in and 6, a rock-breaking speed-increasing tool with a hammer shaft reciprocating self-impacting structure includes a joint 1 and a drill body 3. A fixed cutting structure 31 is arranged at the lower end of the drill body 3, and a fixed cutting structure 31 is arranged on the fixed cutting structure 31. Teeth 32, the inner cavity of the drill bit body 3 communicates with the outside world through the water hole 33 inside the fixed cutting structure 31; the joint 1 is connected with the drill bit body 3 to form an inner cavity, and the inner cavity includes a main cavity 131, the bottom diameter of the cylindrical liquid inlet channel 1311 on the upper part of the main cavity 131 and the bottom surface of the lower part are larger than the coaxial cylindrical piston chamber 1312 of the liquid inlet channel 1311, the connection between the liquid inlet channel 1311 and the piston chamber 1312 A valve seat 11 with a variable cross-se...

Embodiment 2

[0051] In this example, if Figure 1~4 As shown in and 6, a rock-breaking speed-up tool with a hammer shaft reciprocating self-impact structure, as another solution, the cross section of the hammer shaft slideway 35 is a regular polygon, and correspondingly in the hammer shaft slideway 35 The hammer rod 42 of motion is a corresponding regular polygon, and now the piston hammer 4 rotates with the drill bit, and the impact rock effect is better. The rest of the technical features are the same as those in Embodiment 1.

Embodiment 3

[0053] In this example, if Figure 5 , 6 As shown in , 8, a rock-breaking speed-up tool with a hammer rod reciprocating self-impact structure, a valve-type impactor is arranged in the main cavity 131, and the valve-type impactor includes a piston hammer 4 and 1 root spring 2, the piston hammer 4 includes a hammer head 41 and two hammer rods 42; 42 passes through two hammer rod slideways 35 successively from bottom to top, and is connected with the lower end of the hammer head 41 . One hammer head 41 and two hammer rods 42 are set in this program. Due to the simplicity of the structure, two hammer rods are designed in the limited space of the drill body 3 at the same time. The axial center line of the drill bit body 3 is evenly distributed in the circumferential direction, and is staggered from the water hole 33 inside the drill bit body 3, so that the force on the hammer shaft 42 is uniform, and the balance of the drill bit is maintained when the impact force is applied. Th...

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Abstract

The invention discloses a rock breaking speed-increasing tool with a hammer rod reciprocating self-impact structure. The rock breaking speed-increasing tool comprises a connector, a drill bit body anda valve-type impactor; the connector is connected with the drill bit body to form an inner cavity; the inner cavity comprises a main cavity body, a cylindrical liquid inlet channel in the upper portion of the main cavity body, and a coaxial cylindrical piston cavity in the lower portion of the main cavity body, wherein the bottom face diameter of the coaxial cylindrical piston cavity is greater than that of the liquid inlet channel; a valve seat with the variable cross section is arranged between the liquid inlet channel and the piston cavity; the lower portion of the drill bit body is provided with a hammer rod slideway; the valve-type impactor is arranged in the main cavity body and comprises the valve seat, a piston punch hammer and a spring; and the piston punch hammer conduct reciprocating movement under the effect of the spring and hydraulic power. By cooperating with a drill bit, the rock breaking mechanism of local impact assisting scraping is achieved, the purpose of rock breaking speed-increasing is achieved, the structure is simple, the multiple reciprocating self-impact structures can be designed simultaneously, the multiple hammer rods can further be designed simultaneously, and the rock breaking efficiency of impact assisting scraping is further improved.

Description

technical field [0001] The invention belongs to the field of oil and gas drilling, and in particular relates to a rock-breaking speed-increasing tool with a hammer shaft reciprocating self-impacting structure. Background technique [0002] The drill bit is a rock-breaking tool used in drilling engineering to break rock and form a wellbore. With the exploration and development of oil and gas in the petroleum industry, the shallow oil and gas resources are increasingly depleted, the wells drilled by the oil industry are getting deeper and deeper, the strata are getting older, and the rocks are getting harder and harder. The problem of increasing the drilling speed of deep wells has become an important research topic in the drilling industry. one. [0003] Conventional drill bits used in drilling engineering today mainly include roller cone bits, PDC drill bits and punching rotary drill bits. In recent years, as oil and gas drilling projects have entered deep formations, the ...

Claims

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Application Information

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IPC IPC(8): E21B1/38E21B10/36E21B10/38
CPCE21B1/00E21B10/36E21B10/38
Inventor 祝效华郭光亮童华
Owner SOUTHWEST PETROLEUM UNIV
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