水平井裸眼完井砾石充填步骤

The Baker Hughes CSAP gravel pack system has all of the same field proven features of CS-300 system. The definition of CSAP is Cake-Saver-Acid-Placement, before running in hole with the gravel pack assembly, displace the open hole section in casing to brine. It’s critical to the successive hole cleaning to maximize the fluid velocity at 300 ft/min near the well bore wall.

贝克休斯CSAP砾石充填系统具有CS-300已经验证的所有相同的属性。在向井下下砾石充填的组合工具时，向套管下的裸眼部分打入盐水，这对裸眼井壁附近液流速度达到300英尺每分，连续地洗井起着非常关键的作用。

For this reason, it’s important to fully maintain turbulent fluid possible. Low-viscosity fluids are desired to help to retain turbulence. However, while low-viscosity fluids help maximize velocity near the wall. It’s commonly assumed that their use also makes it somewhat more difficult to remove solids from the wellbore. To carry solids completely out of the wellbore,elevated flow velocities are required.

由于这个原因，完全保持湍流的液体很重要。低剪切速度的液体有助于保持湍流。然而，尽管低剪切速度的流体能保证井壁附近的流体高流速。但是通常它们也存在一个缺点那就是更难将井眼的固体携带出来。为了将固体百分之百地携带出井眼，就要求液体具有很高的流速。

The steps to compete the procedure are:

步骤如下：

1、Pick up gravel pack assembly and run in hole to setting depth.

将砾石充填组合工具下放到井下预定的深度。

2、Circulate brine down the work string and out the GPV shoe around the screen annulus at a rate below 25ft/sec pass the SC packing element.

将盐水循环到工作管住从GPV引鞋流出，到筛管环空周围，速度为25英尺没秒以内，通过防砂充填工具。

3、Drop a stainless steel ball to set the SC packer, this section will shift the ball seat isolation sleeve downward, opening the return bypass ports in the crossover tool, and locking the primary ball on the ball seat.

将一个不锈钢球丢手，坐在防砂封隔器上，会使球座封隔套筒向下移动，打开crossover tool 的回路旁通通道，将初始的那个不锈钢球锁在球座上。

4、Set the packer, pull the packer tech-unit, perform an anchor test on the SC packer.

坐封隔器，拉动封隔器部分，在防砂封隔器上做一个锚定测试。

5、Pull 30000 pounds over the last recorded up-weight, followed by slacking off 30,000 pounds below the last recorded down-weight. This is your running in hole position. Followed by picking up the work string to confirm the crossover tool is free from the gravel pack packer assembly.

最后一个记录的上提载荷重加到30000磅，然后将最后一个记录的释放重量加到30000磅。这是下工具的位置。接下来上提工作管住以确保crossover tool脱离了防砂封隔器组合，可以自由上提下放。

6、Pick up the work string to position the SMART Collet above the first indicating coupling, slack off 30,000 pounds, this is your test packer position. Apply the required test pressure to the annulus, to confirm the SC packing element is packed off on the casing inside diameter.

上提工作管住到SMART Collet 的第一个位置指示接箍，释放30000磅的重量，这个是测试封隔器的位置。对环空进行要求的压力测试，来保证防砂封隔工具坐封在了套管避上。7、Pick up the work string to position the SMART Collet above the second indicating coupling.