Tag Archives: drilling engineering

Behind the Scenes: What Professional Expertise Powers Pump-and-Pull Cementing Success?

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In the realm of oil and gas extraction, setting a cement plug to seal off fluid movement in wells is a critical task. Whether it is for well abandonment or providing a starting point for sidetrack drilling, achieving a reliable seal demands precision and expertise.

While the classic gravity-assisted balanced plug technique holds its own in vertical or moderately deviated wells, we're talking about a whole new ball game when it comes to horizontal or highly deviated holes. In those situations, it's time to pivot and explore alternative strategies. The industry successfully practiced the pump-and-pull method (Fig. 1). Unlike its gravity-dependent counterpart, pump-and-pull does not rely on gravity alone to spot the cement plug. Instead, the cementing crew pulls the pipe out of the hole while simultaneously pumping fluids into it. This approach offers superior control during plug placement, minimizing the risk of cement stringing out—an invaluable advantage in highly deviated or horizontal wells.

Fig. 1—Pump-and-Pull Method

Let's face it, executing pump-and-pull jobs comes with its fair share of challenges. Synchronizing pulling speed with pumping rate is paramount to minimize contamination, making meticulous flow rate design critical. During the design phase, predicting fluid tops and slurry contaminations, along with calculating pumping pressure and downhole equivalent circulating density (ECD), are essential—but manually crunching these numbers in the face of complex wellbore structures, survey data, and pump sequences proves inefficient.

Enter PlugPRO – Cement Plug Placement software, a successful computer model in cementing design. PlugPRO introduces an innovative "pump-and-pull" feature alongside its existing balanced plug and dual annulus methods (Fig. 2), empowering engineers to tackle complex plug jobs with confidence.

Fig. 2—Existing Balanced Plug and Dual Annulus Methods in PlugPRO

This feature offers three distinct options for pump-and-pull simulation, catering to various operational scenarios:

1. Sacrificial Cement: This method involves initially pumping a controlled amount of cement into the annulus before initiating the pump-and-pull operation (Fig. 3). The synchronization of pulling speed and pumping rate is crucial to effectively mitigate contamination risks in this method.

Fig. 3—First Pump-and-Pull Method: Sacrificial Cement

2. Pump and Pull after Cement Placement: Tailored for open holes, this method allows for the displacement of a significant portion of the cement slurry to the desired plug top, with the stinger positioned at the bottom depth of the cement (Fig. 4).

Fig. 4—Second Pump-and-Pull Method: Pump and Pull After Cement Placement

3. User-Defined Pump-and-Pull: Providing unmatched flexibility, this option empowers engineers to customize pump-and-pull sequences according to specific operational requirements (Fig. 5). By doing so, engineers can gain a comprehensive understanding of progress and identify any potential synchronization issues proactively.

Fig. 5—Third Pump-and-Pull Method: User-Defined Pump-and-Pull

PlugPRO now stands out as the go-to solution for enhancing pump-and-pull cementing operations. By precisely computing essential results such as fluid tops, pump pressure, ECD, temperature, and more, it empowers engineers with the tools they need to carry out their tasks with precision and confidence. With PlugPRO at their disposal, professionals can rely on the dependability and effectiveness of their cementing jobs, guaranteeing favorable results in the field.

Ready to take your plug jobs in cementing to the next level? Watch the video below to learn the Pump-and-Pull methods mentioned in this article and start mastering your technique.

For more information on the features of PlugPRO, visit our website:

www.pvisoftware.com/plugpro-cement-plug-placement.html

Explore PlugPRO firsthand - contact us at info@pvisoftware.com to schedule a complimentary demo.

Let’s elevate your cementing operations together!

We Wear The Watch We Make

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I am not just one of our software developers; I am also a user and so is everyone else on our team. Our insatiable curiosity and passion about drilling engineering and problem solving are the driving force behind delivering our products. Our goal is to save drilling professionals’ time and reduce risks, and if we do it right, we also help ourselves – BONUS!

Software development, specially drilling software development, requires collaboration from a pool of talents, ranging from drilling engineers, mathematicians, programmers and quality control personnel. A good software package is measured not only by the accuracy or comprehensiveness, but also by how easy it is to use it. The gaps between users and developers are always there. We try to bridge that gap by utilizing our own software on our consulting projects.

Using our own software transforms us from developers to decision-makers. We become more sensitive to users’ needs and more careful in our interface design.

It is not always easy, but it is a lot of fun. From every interface design we put into the software, we toss aside dozens more. If we are complaining about the number of clicks to accomplish a task, then the users would too.

The results?

The software we use is the software we develop, in other words, we wear the watch we make.

Language War, No More

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I made a stop in Paris during my trip to Dubai. Although I don’t speak a word of French, I somehow managed to get around and order meals. I’ve heard from others that some French people deliberately speak French to English-speaking visitors, even though they’re able to speak English. Whether this is true or not, I’m not sure. I myself didn’t meet many people who do not speak English in Paris. If this statement is true, which I doubt it; it would be hard for us to understand one another. To communicate in our own native tongue is hard enough, why create an artificial barrier?

While visiting the Louvre museum, I noticed that all the labels are in French, which I found quite visitor-unfriendly, since most of the visitors in that museum are foreigners. This made my quick tour of the museum quicker than anticipated. I briefly looked through most of the art works except one painting that caught my attention: I even did not need to read the label to understand it.  I was so fascinated by this painting that I even took a picture of it.

David in Louval

As you may already know, the painting depicts the Bible story of David and Goliath. According to the Bible, David heard that the Philistine giant Goliath challenged the Israelites to send their own champion to decide the outcome in single combat. David went out to face Goliath alone. David picked five smooth stones from a nearby brook and struck Goliath in the forehead with a stone from his sling. Goliath fell dead, and David took Goliath's sword and beheaded him. I read that story a couple of weeks ago and it was delightful to refresh my memory in front of the giant painting.

As they say, art does not have borders. Art does not rely on language to manifest its meaning, just like we can appreciate and understand the paintings and sculptures from France and Italy without speaking their languages.

I’ve been involved in the drilling engineering field for a long time and met many drilling engineers from different countries, mostly during our software training sessions. We all are able to communicate with each other easily despite our language differences. I figured out it must be due to the following reasons:

  • Most people in the drilling industry can understand and speak some English.
  • Tables and charts are easier to understand than articles.
  • Our software has been translated into Spanish, Russian, Chinese and Portuguese.

TADPRO - Torque and Drag Multilanguage

It is our goal and effort to create some universal engineering tools for our drilling community.