CN212508176U - Jet mechanism for rotary guide underground unfreezing - Google Patents

Abstract

The utility model discloses a efflux mechanism that is used for rotary steering to unfreeze in pit relates to oil well drilling equipment technical field in the pit. The utility model discloses design the jet hole of an adjustable area on the drilling string of rotatory direction downhole equipment, think at engineering technical personnel underground detritus bed and pile up when serious, can issue the instruction and open the downthehole adjustable bypass valve of jet, let some drilling fluids pass through the jet hole to it is rotatory to combine the drilling string, forms rotatory efflux, destroys peripheral detritus bed, realizes the unfreezing of rotatory direction instrument. The utility model discloses simple structure, the unfreezing ability reinforce can effectively solve the rotary steering instrument's in the pit card brill problem.

Description

Jet mechanism for rotary guide underground unfreezing

Technical Field

The utility model relates to an oil well drilling equipment technical field in the pit, more specifically say and relate to a efflux mechanism that is used for rotatory direction unfreezing in the pit.

Background

In the drilling process, water-sensitive strata such as loose layers, clay, mudstone, shale and the like can be drilled, and the problems of expansion, diameter reduction, peeling and the like can be easily caused when the strata meet water, so that the safety of the drilling tool in the well is seriously threatened. In the process of drilling the stratum, the mud is easy to be stuck under the conditions of slight carelessness or sudden power failure and mud non-circulation. Therefore, the most common problem when drilling in such formations is sticking.

Along with the continuous propulsion of shale gas exploration and development, major displacement wells and horizontal wells in Sichuan Yu areas, particularly three-dimensional cluster horizontal wells, are greatly increased, wherein 90% of horizontal wells for shale gas deployment are three-dimensional horizontal wells, and horizontal sections are longer and longer. In horizontal well drilling, the problems of large well friction resistance, underground tool clamping and the like generally exist, and the time efficiency of exploration and development is greatly influenced.

The patent of the invention is CN104863503B, entitled "anti-sticking drilling device based on double-wall drill rod and underground power drilling tool", and the patent comprises a plurality of double-wall drill rods which are sequentially arranged and connected in series, a rotary jet sand removal device is connected between the double-wall drill rods, the bottom end of the last double-wall drill rod is connected with a conversion joint, and the lower end of the conversion joint is connected with the underground power drilling tool. The rotary jet desanding device and the single-double-wall drill rod adapter are applied to a drill string, so that the flow rate of drilling fluid in an outer annular overflow channel between an outer pipe of the double-wall drill rod and a well wall can be increased, the deposition of solid-phase particles can be reduced, filter cakes deposited on the well wall can be reduced, and the occurrence of sticking and sticking accidents can be effectively prevented.

The above prior art has disclosed that the occurrence of sticking and sticking accidents can be effectively prevented by the jet hole on the drill string. However, the above prior art can only play a role in prevention, and if a stuck drill accident occurs, the solution in the above prior art is not ideal in stuck releasing capability.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defect that exists among the above-mentioned prior art and not enough, the utility model provides a efflux mechanism for rotary steering unfreezes in pit, the utility model discloses an invention aim at solves the unsatisfactory problem of the equipment unfreezing ability in the pit among the prior art, the utility model discloses design the jet hole of an adjustable area on the drilling string of rotary steering underground equipment, when engineering technical staff think the rock debris bed in the pit to pile up seriously, can issue the instruction and open the adjustable bypass valve in the jet hole, let a part drilling fluid pass through the jet hole to it is rotatory to combine the drilling string, forms rotatory efflux, destroys peripheral rock debris bed, realizes the unfreezing of rotary steering instrument. The utility model discloses simple structure, the unfreezing ability reinforce can effectively solve the rotary steering instrument's in the pit card brill problem.

In order to solve the problems existing in the prior art, the utility model discloses a realize through following technical scheme:

a fluidic mechanism for rotary steerable downhole unfreezing, comprising a drill string and a jet hole disposed on the drill string, the jet hole being disposed obliquely to the direction of the drill bit, characterized in that: the emergent angle of the jet hole is 30-45 degrees; the adjustable bypass valve is installed at the jet hole, the adjustable bypass valve comprises a driving motor, a rotor end and a stator end, an output shaft of the driving motor is connected with the rotor end, fan-shaped holes are formed in the rotor end and the stator end, the driving motor drives the rotor end to rotate relative to the stator end, the overlapping area of the fan-shaped holes in the rotor end and the stator end is changed, and therefore opening and closing of the jet hole are adjusted.

The adjustable bypass valve further comprises an outer barrel, the outer barrel is arranged in the jet hole, the driving motor is fixedly installed on the inner wall of the outer barrel through a motor supporting plate, and the stator end is fixedly installed on the inner wall of the outer barrel.

The lateral wall of the outer barrel is provided with a bypass hole, and the stator end is provided with a through hole connected with the bypass hole. And the rotor end is provided with a connecting hole connected with the through hole of the stator end.

Compared with the prior art, the utility model discloses profitable technological effect who brings shows:

1. the utility model discloses design the jet hole of an adjustable area on the drilling string of rotatory direction downhole equipment, think at engineering technical personnel underground detritus bed and pile up when serious, can issue the instruction and open the downthehole adjustable bypass valve of jet, let some drilling fluids pass through the jet hole to it is rotatory to combine the drilling string, forms rotatory efflux, destroys peripheral detritus bed, realizes the unfreezing of rotatory direction instrument. The utility model discloses simple structure, the unfreezing ability reinforce can effectively solve the rotary steering instrument's in the pit card brill problem.

2. The adjustable jet hole consists of a rotor and a stator, wherein the rotor end and the stator end are both wear-resistant alloy fan-shaped columns. The rotor rotates to change the overlapping area of the two fan-shaped holes, so that the area of the jet hole is adjusted to form different jets, and the requirements for cleaning different rock debris beds are met. The rotation power of the rotor is realized by electric control liquid; determining the position of a rotor moving target according to the relation between the opening area of the jet hole and the position of the rotor; converting the position into the angle and direction of the rotor to be rotated according to the target position and the current position of the rotor; the driving motor drives the rotor to rotate to a target angle and direction; and opening and adjusting the area of the jet hole.

Drawings

Fig. 1 is a schematic structural view of the jet mechanism of the present invention;

FIG. 2 is a schematic structural view of the adjustable bypass valve of the present invention;

FIG. 3 is a cross-sectional view A-A of FIG. 2 according to the present invention;

reference numerals: 1. the device comprises a drill string, 2, a jet hole, 3, an adjustable bypass valve, 4, a driving motor, 5, a motor supporting plate, 6, an outer cylinder, 7, a rotor end, 8, a stator end, 9, a fan-shaped hole, 10, a bypass hole, 11, a through hole, 12 and a connecting hole.

Detailed Description

The technical solution of the present invention will be further elaborated with reference to the drawings attached to the description.

Example 1

As a preferred embodiment of the present invention, referring to fig. 1 and 2 of the specification, the present embodiment discloses:

as shown in fig. 1, a jet mechanism for rotary steering downhole unfreezing comprises a drill string 1 and a jet hole 2 arranged on the drill string 1, wherein the jet hole 2 is arranged obliquely towards a drill bit, and the emergent angle of the jet hole 2 is 30-45 degrees; adjustable bypass valve 3 is installed to 2 departments of jet hole, as shown in fig. 2, adjustable bypass valve 3 includes driving motor 4, rotor end 7 and stator end 8, and driving motor 4 output shaft links to each other with rotor end 7, has all seted up sector hole 9 on rotor end 7 and the stator end 8, and driving motor 4 drives rotor end 7 and rotates for stator end 8, changes the coincidence area of sector hole 9 on rotor end 7 and the stator end 8 to adjust jet hole 2 and open and shut.

Example 2

As another preferred embodiment of the present invention, referring to fig. 1 and 2 of the specification, the present embodiment discloses:

as shown in fig. 1, a jet mechanism for rotary steering downhole unfreezing comprises a drill string 1 and a jet hole 2 arranged on the drill string 1, wherein the jet hole 2 is arranged obliquely towards a drill bit, and the emergent angle of the jet hole 2 is 30-45 degrees; adjustable bypass valve 3 is installed to 2 departments of jet hole, as shown in fig. 2, adjustable bypass valve 3 includes driving motor 4, rotor end 7 and stator end 8, and driving motor 4 output shaft links to each other with rotor end 7, has all seted up sector hole 9 on rotor end 7 and the stator end 8, and driving motor 4 drives rotor end 7 and rotates for stator end 8, changes the coincidence area of sector hole 9 on rotor end 7 and the stator end 8 to adjust jet hole 2 and open and shut. Adjustable bypass valve 3 still includes urceolus 6, urceolus 6 sets up in jet hole 2, driving motor 4 passes through motor support plate 5 fixed mounting in 6 inner walls of urceolus, stator end 8 fixed mounting is in 6 inner walls of urceolus.

Example 3

As another preferred embodiment of the present invention, referring to fig. 1, 2 and 3 of the specification, the present embodiment discloses:

as shown in fig. 1, a jet mechanism for rotary steering downhole unfreezing comprises a drill string 1 and a jet hole 2 arranged on the drill string 1, wherein the jet hole 2 is arranged obliquely towards a drill bit, and the emergent angle of the jet hole 2 is 30-45 degrees; adjustable bypass valve 3 is installed to 2 departments of jet hole, as shown in fig. 2, adjustable bypass valve 3 includes driving motor 4, rotor end 7 and stator end 8, and driving motor 4 output shaft links to each other with rotor end 7, has all seted up sector hole 9 on rotor end 7 and the stator end 8, and driving motor 4 drives rotor end 7 and rotates for stator end 8, changes the coincidence area of sector hole 9 on rotor end 7 and the stator end 8 to adjust jet hole 2 and open and shut. Adjustable bypass valve 3 still includes urceolus 6, urceolus 6 sets up in jet hole 2, driving motor 4 passes through motor support plate 5 fixed mounting in 6 inner walls of urceolus, stator end 8 fixed mounting is in 6 inner walls of urceolus. As shown in fig. 2 and 3, a bypass hole 10 is formed in a side wall of the outer cylinder 6, and a through hole 11 connected to the bypass hole 10 is formed in the stator end 8. The rotor end 7 is provided with a connecting hole 12 connected with a through hole 11 of the stator end 8.

Claims (3)

1. A fluidic mechanism for rotary steerable downhole unfreezing, comprising a drill string (1) and a jet hole (2) arranged on the drill string (1), the jet hole (2) being arranged obliquely to the drill bit direction, characterized in that: the emergent angle of the jet hole (2) is 30-45 degrees; adjustable bypass valve (3) are installed in jet hole (2) department, adjustable bypass valve (3) are including driving motor (4), rotor end (7) and stator end (8), and driving motor (4) output shaft links to each other with rotor end (7), has all seted up fan-shaped hole (9) on rotor end (7) and stator end (8), and driving motor (4) drive rotor end (7) rotate for stator end (8), change the coincidence area of fan-shaped hole (9) on rotor end (7) and stator end (8) to adjust jet hole (2) and open and shut.

2. The fluidic mechanism for rotary steerable downhole unfreezing of claim 1, wherein: adjustable bypass valve (3) still include urceolus (6), urceolus (6) set up in jet hole (2), driving motor (4) are in through motor backup pad (5) fixed mounting urceolus (6) inner wall, stator end (8) fixed mounting is in urceolus (6) inner wall.

3. The fluidic mechanism for rotary steerable downhole unfreezing of claim 2, wherein: a bypass hole (10) is formed in the side wall of the outer cylinder (6), and a through hole (11) connected with the bypass hole (10) is formed in the stator end (8); the rotor end (7) is provided with a connecting hole (12) connected with the through hole (11) of the stator end (8).

Images