阅读说明：本技术 一种井下作业高压射流套铣管束 (High-pressure jet flow sleeve milling pipe bundle for underground operation ) 是由 康杰 侯海全 朱儒民 赵贵刚 沈长富 彭洪民 潘迪超 宁运申 魏警卫 张钧涛 于 2019-10-29 设计创作，主要内容包括：一种井下作业高压射流套铣管束,包括：上接头(0),异形壳体(1)、喷嘴(2)、冲砂管束(3)、固定夹板(4)；其特征在于：所述异形壳体(1)上部设有上接头,下部中心设有螺纹连接的喷嘴(2),在异形壳体(1)的偏心部分的下端垂向设有8-18根阶梯状弧形冲砂管束(3),冲砂管束(3)上横向均布设有三级固定夹板(4)。本发明结构简单、拆卸方便、施工操作工序简单,施工液体由泵车打入油管,流经异形壳体的水平扇形过流孔,分流至垂向单管过流孔、小直径无缝钢管形成高速射流,高速流动液体冲击井下工具与套管之间环空的沉积砂,解除砂卡,施工液携带地层砂由套管与油管之间环空返出井筒,进入地面沉砂池,缩短施工周期,节省作业费用。(A downhole operating high pressure jet mill tube bundle comprising: the sand washing machine comprises an upper connector (0), a special-shaped shell (1), a nozzle (2), a sand washing pipe bundle (3) and a fixed clamping plate (4); the method is characterized in that: the special-shaped shell is characterized in that an upper connector is arranged at the upper part of the special-shaped shell (1), a nozzle (2) in threaded connection is arranged at the center of the lower part of the special-shaped shell, 8-18 stepped arc-shaped sand washing tube bundles (3) are vertically arranged at the lower end of the eccentric part of the special-shaped shell (1), and three-stage fixing clamp plates (4) are transversely and uniformly distributed on the sand washing tube bundles (3). The invention has simple structure, convenient disassembly and simple construction operation process, the construction liquid is pumped into the oil pipe by the pump truck, flows through the horizontal fan-shaped overflowing hole of the special-shaped shell, is shunted to the vertical single pipe overflowing hole and the small-diameter seamless steel pipe to form high-speed jet flow, the high-speed flowing liquid impacts the deposited sand in the annular space between the downhole tool and the sleeve to remove sand blocking, the construction liquid carries the formation sand to return out of the shaft from the annular space between the sleeve and the oil pipe and enter a ground grit chamber, the construction period is shortened, and the operation cost is saved.)

1. A downhole operating high pressure jet mill tube bundle comprising: the sand washing machine comprises an upper connector (0), a special-shaped shell (1), a nozzle (2), a sand washing pipe bundle (3) and a fixed clamping plate (4); the method is characterized in that: the special-shaped shell is characterized in that an upper connector is arranged at the upper part of the special-shaped shell (1), a nozzle (2) in threaded connection is arranged at the center of the lower part of the special-shaped shell, 8-18 stepped arc-shaped sand washing tube bundles (3) are vertically arranged at the lower end of the eccentric part of the special-shaped shell (1), and three-stage fixing clamp plates (4) are transversely and uniformly distributed on the sand washing tube bundles (3).

2. The downhole operative high pressure jet mill tube bundle of claim 1, wherein: the upper joint (0) and the special-shaped shell (1) are of an integral structure, an internal thread is arranged at the upper part of a center hole of the upper joint (0), and an internal thread connected with the nozzle (2) is arranged at the lower part of the center hole.

3. The downhole operative high pressure jet mill tube bundle of claim 1, wherein: the special-shaped shell (1) is an elliptic cylinder, a lower inner cavity is provided with a horizontal fan-shaped overflowing hole (S), the right half part of the horizontal fan-shaped overflowing hole (S) is uniformly provided with 8-18 vertical single-tube overflowing holes (C) along the circumferential direction, and the lower part of each vertical single-tube overflowing hole (C) is provided with an internal thread matched with a single tube of the sand washing tube bundle (3).

4. A downhole operating high-pressure jet milling tube bundle according to claims 2 and 3, characterized in that: the lower part of the center hole of the upper joint (0) is communicated with a horizontal fan-shaped overflowing hole (S) of the special-shaped shell (1), and the horizontal fan-shaped overflowing hole (S) is communicated with a vertical single-tube overflowing hole (C).

5. The downhole operative high pressure jet mill tube bundle of claim 1, wherein: the nozzle (2) is a stepped cylinder and is provided with a central hole (Z), the diameter of the upper part is smaller than that of the lower part, and the upper part is provided with an external thread matched with the central hole.

6. The downhole operative high pressure jet mill tube bundle of claim 1, wherein: and a single of the sand washing pipe bundle (3) is a seamless steel pipe with an inner hole phi 6 and an outer diameter phi 10, the upper end of the seamless steel pipe is provided with an external thread matched with the vertical single pipe overflowing hole (C), and the seamless steel pipe is arranged in an arc shape from the middle in a graded manner from low to high.

7. The downhole high pressure jet mill tube bundle of claim 6, wherein: and a single of the sand washing pipe bundle (3) is also provided with an arc-shaped flat pipe with a cross section.

8. The downhole operation high-pressure jet milling tube bundle according to claims 6 and 7, wherein: the sand washing pipe bundle (3) is made of stainless steel materials.

9. The downhole operative high pressure jet mill tube bundle of claim 1, wherein: the fixed splint (4) is in a double-layer arc plate shape, and the middle of the fixed splint is connected by a countersunk head screw.

Technical Field

The invention relates to the technology of an oil field downhole operation tool, in particular to a downhole operation high-pressure jet flow sleeve milling pipe bundle.

Background art:

at present, in the development process of oil fields in the petroleum industry, various downhole tools are arranged in a shaft in order to meet the requirements of different development states. Due to different structures of the underground tool, the outer diameter is different. During secondary workover operations, downhole production tools with small outside diameter sizes are easier to lift out of the wellbore. The annular space between the downhole production tool with larger outer diameter and the casing is smaller, and the fine sand carried out by production liquid from an oil layer is accumulated in the annular space to form a sand blocking tool. Because the clearance between instrument and the sleeve pipe annular space in the pit is less, the annular space sand setting can't be handled to the present cover milling barrel instrument size limitation, leads to the construction process complicacy, extravagant a large amount of manpower and materials.

The on-site use of a casing milling pipe is a special tool for casing milling a clamped drilling tool to remove underground drilling clamping accidents, the casing milling pipe adopts bipolar synchronous trapezoidal threads as a connection mode, and screw threads at two ends adopt a shoulder design and an inner and outer flat joint design of a common adapter. The clearance between the well hole and the milling pipe is generally 6-8mm, and the clearance between the milling pipe and the fish is more than 3.2 mm. Therefore, when the inner diameter and the outer diameter of the casing pipe both meet the requirements of the conditions in the well, otherwise, the casing milling pipe cannot be used for implementing casing milling and releasing drill clamping.

The utility model provides a can bore bridge plug bushing and mill integrative instrument of salvaging, patent number: 201822182328.6, comprising: the top connection is equipped with the shell milling device below the top connection, the shell milling device includes a shell milling section of thick bamboo, is equipped with the milling head at the lower extreme of a shell milling section of thick bamboo, still is equipped with the fishing device who is connected with the top connection in a shell milling section of thick bamboo, fishing device includes the fishing spear head, is connected with the fishing spear head, makes the fishing spear head extend the spear head connecting rod of a shell milling section of thick bamboo lower edge to and make spear head connecting rod and top connection be connected, prevent the fishing spear head and follow the rotatory lance joint of a shell milling section of thick bamboo, a shell milling section of thick bamboo passes through the fishing spear and connects overcoat and be connected with the top connection, is equipped with the fixed annular of fishing spear joint at the inner wall of fishing spear joint overcoat, and the lance joint passes through the bearing to be. The utility model discloses can bore bridge plug cover and mill integrative instrument one-time operation of salvaging just can get rid of the bridge plug that can bore to the well is salvaged to the bridge plug debris that can bore after milling the cover, is applicable to the complicated well of process. But has no sand washing function, and is not suitable for the sand blockage caused by the inner diameter phi 159.8mm of the casing, the outer diameter phi 130mm of the downhole tool and the annular space phi 14.9 mm.

The utility model provides an outer card cover mills fishing device, patent number: 201822099951.5, comprising: salvage the body, the one end of salvaging the body is connected with attach fitting, the other end of salvaging the body is connected with protection mechanism, salvage the inside cavity of body, attach fitting and protection mechanism and communicate with each other, it has interim skylight to salvage to open on the body it is equipped with the barb of leanin to salvage interim skylight department on the body, barb and the outer draw-in groove phase-match of salvaging the object. The utility model discloses temporary skylight department on salvaging the body is equipped with the barb of leanin, barb and the outer draw-in groove phase-match of salvaging the object, and the user will salvage the body and put into the well, makes during salvaging the object and getting into and salvaging the body, and the barb of salvaging on the body is hung and is salvaged the outer draw-in groove on the object to can more be favorable to salvaging the object from the well and come. The device also has no sand washing function, but the tool is not suitable for being used when the inner diameter of the casing is 159.8mm, the outer diameter of the downhole tool is 130mm, and the annular space is 14.9mm to cause sand blocking.

Disclosure of Invention

In view of the above problems, the present invention aims to provide a high-pressure jet casing milling tube bundle for downhole operation, which solves the problem of tool sand jam during the secondary workover operation of oil-water well production and injection stoppage, rapidly removes the downhole tool and the shaft annulus sand jam, realizes the operation cost saving, reduces the environmental pollution and ensures the well control safety.

The invention comprises the following steps: the device comprises an upper connector, a special-shaped shell, a nozzle, a sand washing pipe bundle and a fixed clamping plate; the method is characterized in that: the upper part of the special-shaped shell is provided with an upper joint, the center of the lower part of the special-shaped shell is provided with a nozzle in threaded connection, the lower end of the eccentric part of the special-shaped shell is vertically provided with 8-18 step-shaped arc sand washing pipe bundles, and three-stage fixed clamping plates are transversely and uniformly distributed on the sand washing pipe bundles.

The upper joint and the special-shaped shell in the preferred downhole operation high-pressure jet milling pipe bundle are of an integral structure, the upper part of a central hole of the upper joint is provided with internal threads, and the lower part of the central hole is provided with internal threads of a nozzle.

The optimized special-shaped shell in the underground operation high-pressure jet sleeve milling tube bundle is an elliptical cylinder, a lower cavity is provided with a horizontal fan-shaped overflowing hole, the right half part of the horizontal fan-shaped overflowing hole is uniformly provided with 8-18 vertical single tube overflowing holes along the circumferential direction, and the lower part of the vertical single tube overflowing hole is provided with an internal thread matched with a single tube of the sand washing tube bundle.

The lower part of the central hole of the upper joint in the preferred downhole operation high-pressure jet milling pipe bundle is communicated with a horizontal fan-shaped overflowing hole of the special-shaped shell, and the horizontal fan-shaped overflowing hole is communicated with a vertical single pipe overflowing hole.

The preferred nozzle in the downhole operation high-pressure jet milling pipe bundle is a step-shaped cylinder and is provided with a central hole, the diameter of the upper part of the nozzle is smaller than that of the lower part of the nozzle, and the upper part of the nozzle is provided with an external thread matched with the central hole.

A single piece of the sand washing tube bundle in the preferable underground operation high-pressure jet flow sleeve milling tube bundle is a seamless steel tube with an inner hole phi 6 and an outer diameter phi 10, the upper end of the seamless steel tube is provided with an external thread matched with a vertical single tube through-flow hole, and the seamless steel tube is arranged in an arc shape from the middle in a graded manner from low to high.

The cross section of a single sand washing tube bundle in the preferable underground operation high-pressure jet flow milling tube bundle is also designed to be an arc flat tube.

The sand washing tube bundle in the preferable high-pressure jet flow milling tube bundle for the downhole operation is made of stainless steel materials.

The invention has the beneficial effects that: simple structure, it is convenient to dismantle, construction operation process is simple, construction liquid is squeezed into oil pipe by the pump truck, the fan-shaped discharge orifice of level of special-shaped casing of flowing through, reposition of redundant personnel to vertical single tube discharge orifice, minor diameter seamless steel pipe forms high-speed efflux, the annular deposit sand between instrument and the sleeve pipe in the pit is strikeed to the liquid of high-speed flow, removes the sand card, construction liquid carries the stratum sand and returns the pit shaft by the annular space between sleeve pipe and the oil pipe, gets into ground grit chamber, shortens construction cycle, saves the working costs.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description, serve to explain the invention without unduly limiting the invention.

FIG. 1 is a schematic view of the main view of the full-section structure of the present invention.

FIG. 2-schematic of the structure of the invention A-A.

The labels in the figures are: 0-upper joint, 1-special-shaped shell, 2-nozzle, 3-sand washing tube bundle and 4-fixed clamping plate.

The letters in the figures are labeled: s-horizontal fan-shaped overflowing holes, C-vertical single pipe overflowing holes and Z-central holes.

Detailed Description

In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that such embodiment(s) may be practiced without these specific details.