To enable the drilling fluid to flow down the hole during drilling, a wide variety of equipment types are employed. An annulus, drilling stems, drill pipe, drill pipe fittings, and other parts are all needed to permit fluid flow. These are used to direct the fluid through the well and can be built of steel, aluminum alloy, or other materials.
Estimating flow rates is necessary for non-surface flowing DST flow/shut-in sequences. These flow rates can be computed using pressure information from the gauge located above the DST tool, or on the basis of the drill string's volume.
Typically, the initial flow period is brief. There is a longer flow period in the second. Prior to performing the test, the flow period is established. It's possible that the flow rate is not regulated during the build-up phase.
Pressures are measured as a function of time during the flow period. Normally, pressures on a log-log scale are flat. However, throughout production, pressure reactions frequently go up. Pressures may enter the radial flow regime during the build-up phase before the first point that is recorded. The skin effect is what is meant by this. The impact of friction in the production string must also be taken into consideration.
DSTs were initially created to distinguish between reservoir fluids. They were intended to gather accurate information about pressure rise, nevertheless.
Making the appropriate compression set selection for drill stem tests is essential. To optimize the compression set's performance, the correct material selection is crucial. The compression set frequently separates successful wells from unsuccessful ones. A compression set with strong zonal isolation and high well efficiency is what you desire. To determine which compression set will work best for your application, speak with a Stockwell Elastomerics expert if you're unsure.
Compression settings can be mechanically set or tie-back, among other variations. Most frequently, mechanical setup tools are used in conjunction with tie-back packs. At the bottom, integrated seals that have undergone pressure testing are present. Additionally, they have a "extra" part that stops pumping uphole.
Slips are used in mechanically set compression sets to support the set's body. A shear pin that keeps the slips in place avoids early setting. The shear pin, a tiny but effective tool, can prevent the body from moving out of position.
In the 1970s, open hole completion was used in a number of Middle Eastern oil fields. In the late 1980s, the slotted liner generally took its place. Although the open hole offers many benefits, the wellbore collapse risk remains an issue.
The open hole with drill stem test can be carried out in a number of different ways. In one technique, sand control is used to avoid borewell casing blockage. A heavier kill mud is used in a more advanced technique to control flow. A well's commercial productivity can also be tested using the bottom hole assembly (BHA) technique.
In another approach, packers are spaced at intervals. An inflate set packer or annular fluid can be used to inflate the packer. These could be utilized to plug the borehole and separate important areas.
An identical technique employs a compression-set packer. There are some benefits that are similar to those of the sand control strategy. The capacity to regulate flow rate is one benefit.
To identify formation degradation and its consequences on oil and gas recovery, numerous techniques have been developed. The techniques must, however, keep developing. Damage can be calculated and repairs can be made using a drill stem test string.
To calculate wellbore damage, one uses the damage ratio approach. The wellbore's permeability, the wellbore storage constant (WBSC), and the investigation's radius are used to calculate the damage (ROI). The length of the wellbore is determined by the radius of investigation. A brief ROI denotes fluid loss and overbalance.
The formation's permeability up to the radius rd is the damaged zone permeability. Designing stimulation treatments involves taking into account the radial extent of damage. In a damaged zone, a low formation transmissibility is typically observed.
Chemical reactions may occur if drill pipe-in fluids and formation fluids are incompatible. The permeability of the fluids and the wellbore may be impacted by the incompatibilities. Reduced productivity is the outcome of this.
It has a long history and is a government-owned business. More than 20 R&D, engineers, and designers work for the company. Each engineer has more than ten years of experience in product design and research & development. To satisfy consumer requests, they may design and create high-quality machinery and goods.
Some of our manufacturing equipment, as well as the majority of our raw materials, are imported from other countries. Our business is lucky to have more than 15 years of production experience. This includes everything from production operators to people who operate mechanical equipment. China is well known for its premium goods and rave customer evaluations. Both in China and abroad, it has been able to develop a dependable consumer base.
This organization was founded in 1958. It relocated to the 200 million asset, 120 mi2 Wuxi Huishan Economic Development Zone. It possesses a number of intellectual property-related patents, has updated domestic records for small-diameter deephole drilling construction, and participated in the development of the national standard for geological core drilling tools. The business is accredited by the American Petroleum Association (API-5CT), OHSAS18000, and ISO9001:2000 for its quality management system, occupational health and safety management system, respectively.
As a recognized business with roots in geological exploration, we aim to serve a variety of clients. We provide a range of business formats, including retail, specialized processing, wholesale, and more. In order to produce high-quality goods that meet each client's unique specifications, we can assist customers in designing the most effective manufacturing machinery. Complete product customization services are offered by the business, commencing with demand analysis, product selection, on-site analysis, and specifications. Additionally included is construction safety. For the exploration of raw resources and the geology, we offer a full range of services.