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Downhole hydraulic propulsion device

A propulsion device and hydraulic technology, applied in wellbore/well parts, earthwork drilling and production, etc., can solve the problems of screw self-locking, oscillator reducing friction, short service life, etc., to increase the depth of entry and facilitate installation , low-cost effect

Active Publication Date: 2019-03-19
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the coiled tubing is a flexible tubing, when used in a horizontal well, it is affected by the friction between the inner and the well wall, and the helical self-locking phenomenon often occurs and cannot be lowered to the bottom of the well.
The existing downhole tools for increasing the depth generally use oscillators, which have complex structures, high prices and relatively short service life. The oscillators can only reduce friction and cannot provide thrust. For horizontal wells with a well deviation greater than 90°, the increase limited depth

Method used

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  • Downhole hydraulic propulsion device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A downhole hydraulic propulsion device, comprising a device body 2; an axial through hole 8 is opened in the center of the device body 2, the inner diameter of the upper part of the axial through hole 8 is 45 mm, and the inner diameter of the lower part is 35 mm; the outer wall of the device body 2 partially protrudes to form a ring The boss, on the upper end surface of the annular boss, is evenly provided with eight oblique through-holes 8 downside and connected with the through-holes 8 along the circumferential direction; The deceleration channel 3 and the spray channel 4 with an inner diameter of 2mm at the lower part; eight deceleration channels 3 corresponding to the first liquid passage channel and formed with the first liquid passage channel are also provided along the circumferential direction on the lower end surface of the annular boss The connected second liquid passage 5; the eight second liquid passages 5 are all axially parallel to the through hole 8, and t...

Embodiment 2

[0038]A downhole hydraulic propulsion device, comprising a device body 2; an axial through hole 8 is opened in the center of the device body 2, the inner diameter of the upper part of the axial through hole 8 is 50 mm, and the inner diameter of the lower part is 38 mm; the outer wall of the device body 2 partially protrudes to form a ring The boss, on the upper end surface of the annular boss, is evenly provided with six oblique through holes 8 lower side and communicated with the through holes 8 along the circumferential direction; the first liquid passage includes the upper inner diameter of 5mm. The deceleration channel 3 and the spray channel 4 with an inner diameter of 3mm at the lower part; six deceleration channels 3 corresponding to the first liquid passage channel and formed with the first liquid passage channel are also provided along the circumferential direction on the lower end surface of the annular boss The connected second liquid passage 5; the eight second liqu...

Embodiment 3

[0041] A downhole hydraulic propulsion device, comprising a device body 2; an axial through hole 8 is opened in the center of the device body 2, the inner diameter of the upper part of the axial through hole 8 is 50 mm, and the inner diameter of the lower part is 38 mm; the outer wall of the device body 2 partially protrudes to form a ring Boss, on the upper end surface of the annular boss, there are four oblique through-holes 8 downside evenly along the circumferential direction and form the first liquid passageway connected with the through-hole 8; the first liquid passageway includes the inner diameter of the upper part is 8mm The deceleration channel 3 and the spray channel 4 with an inner diameter of 5mm at the lower part; on the lower end surface of the annular boss along the circumferential direction, there are also four deceleration channels 3 corresponding to the first liquid passage channel and formed with the first liquid passage channel. The connected second liquid ...

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Abstract

The invention discloses a downhole hydraulic propelling device. The downhole hydraulic propelling device comprises a device body. An axial through hole is formed in the center of the device body, and part of the outer wall of the device body protrudes to form an annular boss. A plurality of liquid passing ducts are formed in the upper end face of the annular boss in the circumferential direction, incline to the lower side of the through hole and are communicated with the through hole. A plurality of second liquid passing ducts are formed in the lower end face of the annular boss in the circumferential direction, are in one-to-one correspondence with the first liquid passing ducts and are communicated with the large-inner-diameter parts of the first liquid passing ducts, the second liquid passing ducts are parallel to the axis of the through hole, and the communicating positions are close to the diameter varying parts of the first liquid passing ducts. The inner diameter of the upper portion of the through hole is larger than that of the lower portion of the through hole, and a baffle is fixedly arranged at the position, close to the bottom of the through hole, of the inner wall and is used for stopping liquid from flowing out from the bottom end of the through hole. The downhole hydraulic propelling device is simple in structure, convenient to install, environmentally friendly and low in cost, it is unnecessary to additionally arrange ground equipment, and the lowering depth of coiled tubing is increased with water pressure.

Description

technical field [0001] The invention relates to the technical field of downhole tools used in the development and application of oil and gas fields, in particular to a downhole hydraulic propulsion device. Background technique [0002] Coiled tubing drilling, perforating, and logging are commonly used procedures in downhole operations, and have been widely used in domestic and foreign petroleum industries. Since the coiled tubing is a flexible tubing, when it is used in a horizontal well, it is affected by the friction between the inner and the well wall, and the spiral self-locking phenomenon often occurs so that it cannot be lowered to the bottom of the well. The existing downhole tools for increasing the depth generally use oscillators, which have complex structures, high prices and relatively short service life. The oscillators can only reduce friction and cannot provide thrust. For horizontal wells with a well deviation greater than 90°, the increase Depth is limited. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B23/08
CPCE21B23/08
Inventor 王林张世林张建华张新忠姚展华平恩顺吴兆亮宋文徐庆祥
Owner BC P INC CHINA NAT PETROLEUM CORP