阅读说明：本技术 掺稀工具及生产管柱 (Mix rare instrument and production tubular column ) 是由 陆爱华 双志强 李原杰 崔航波 黄贺 周津捷 欧如学 单全生 张静严 鲁相 张超 于 2019-05-05 设计创作，主要内容包括：本发明提供一种掺稀工具及生产管柱,该掺稀工具包括：管体及单向阀；管体的顶端与上游油管连通,管体的底端与下游油管连通；单向阀设置在管体上,且单向阀只允许管体外部的降黏剂向管体内部流动。通过单向阀的开关来控制降黏剂向管体内流动,与通过滑套的滑动来实现对管体侧壁通孔的开启和关闭相比,无需设置滑套以及滑套与管体之间的密封圈；避免了密封圈的损坏导致的油管内的石油流入油管与滑套之间的环空内。(The invention provides a dilution tool and a production string, wherein the dilution tool comprises: a pipe body and a one-way valve; the top end of the pipe body is communicated with an upstream oil pipe, and the bottom end of the pipe body is communicated with a downstream oil pipe; the check valve is arranged on the pipe body and only allows the viscosity reducing agent outside the pipe body to flow towards the inside of the pipe body. The flow of the viscosity reducing agent into the pipe body is controlled by the switch of the one-way valve, and compared with the opening and closing of the through hole in the side wall of the pipe body by the sliding of the sliding sleeve, the sliding sleeve and a sealing ring between the sliding sleeve and the pipe body are not required to be arranged; the oil in the oil pipe that has avoided the damage of sealing washer to lead to flows into the annular space between oil pipe and the sliding sleeve.)

1. A thinning tool, comprising: a pipe body and a one-way valve;

the top end of the pipe body is communicated with an upstream oil pipe, and the bottom end of the pipe body is communicated with a downstream oil pipe;

the check valve is arranged on the pipe body and only allows the viscosity reducing agent outside the pipe body to flow into the pipe body.

2. The thinning tool according to claim 1, wherein the pipe body comprises an upper joint, a lower joint, a core pipe and an outer sleeve;

the upper joint is used for being communicated with an upstream oil pipe, and the top end of the outer sleeve is sleeved outside the upper joint; the bottom end of the lower joint is used for being connected with a downstream pipeline, a stopping part is formed at the top end of the lower joint, a sleeve ring is formed on the stopping part, the sleeve ring is sleeved on the outer side of the outer sleeve, and the stopping part abuts against the bottom end of the outer sleeve; the core tube is arranged inside the outer sleeve, and the bottom end of the core tube is communicated with the lower joint;

a flow channel penetrating through the stopping part is arranged on the lower connector, and the bottom end of the flow channel is communicated with the outside of the lower connector; the check valve is arranged between the core tube and the outer sleeve, the top end of the flow channel is communicated with the inlet of the check valve, and the outlet of the check valve is communicated with the core tube.

3. The thinning tool of claim 2, wherein the one-way valve comprises: the first connecting ring, the second connecting ring and the valve core;

the first connecting ring and the second connecting ring are arranged between the core tube and the outer sleeve, and the first connecting ring is provided with a first through hole communicated with the top end of the flow channel; the second connecting ring is arranged on the upper portion of the first connecting ring, a second through hole is formed in the bottom end of the second connecting ring, the second through hole and the center line of the first through hole are arranged in a collinear mode, the valve core is arranged in the second through hole, the valve core is used for blocking the first through hole when the one-way valve is closed, and the second through hole is communicated with the core pipe.

4. The thinning tool according to claim 3, wherein the check valve further comprises a return spring disposed in the second through hole, the return spring being connected to the valve core and a sidewall of the second through hole to urge the valve core against the first connecting ring.

5. The thinning tool according to claim 4, wherein the one-way valve is plural, and the plural one-way valves are each disposed between the core tube and the outer sleeve; the outlet of the previous one-way valve is communicated with the inlet of the next one-way valve.

6. The thinning tool according to claim 3, wherein a first sealing ring is disposed between the first connecting ring and the core tube, and a second sealing ring is disposed between the first connecting ring and the outer sleeve.

7. The thinning tool of claim 2, wherein a filter is disposed within the flow passage to filter viscosity reducing agent flowing through the flow passage.

8. The thinning tool according to claim 2, wherein a third sealing ring is disposed between the upper joint and the outer sleeve.

9. The diluting tool as claimed in claim 2, wherein the lower joint is provided with a guiding hole, the bottom end of the core tube is inserted into the guiding hole, and a fourth sealing ring is arranged between the core tube and the side wall of the guiding hole.

10. A production string, comprising: a thinning tool according to any of claims 1 to 9.