Composition and Development Trends of Drilling Fluid Solid Control Equipment

The performance and quality of drilling fluid solid control equipment are crucial for solid control technology. The drilling fluid solid control system mainly consists of drilling fluid circulation tanks, drilling fluid purification and treatment equipment, and electrical control equipment. The drilling fluid purification and treatment equipment mainly includes shale shakers, desanders, desilters, degassers, centrifuges, sand pumps, agitators, and mixers. For environmentally sensitive areas, drilling cuttings recycling and waste liquid treatment devices can also be configured.

Development trends of drilling fluid solid control equipment:

Currently, there is a focus on developing compact, high-efficiency, and long-lasting equipment such as desanders, desilters, and degassers. Integration with high-speed centrifuges is also being pursued to achieve automatic detection and control of solid control systems based on test results.

Status of drilling fluid solid control equipment overseas:

Solid control equipment overseas has good performance, stable operation, and long lifespan. It has achieved standardization, serialization, and specialization of equipment types. The solid control equipment level overseas is represented by companies such as BRANDT, SWACO, and DERRICK in the United States, which are at the forefront in terms of quality and performance. Foreign countries pay special attention to optimizing the configuration of solid control system equipment and evaluating the efficiency of the entire solid control system. They have developed expert systems for drilling fluid solid control.

The solid control system of the American Petroleum Tools Company consists of four shale shakers and two dryers (dry vibrating screens). The four shale shakers and one dryer are connected in parallel. The drilling fluid returned from the well is divided and sent to the four shale shakers and one dryer for processing. The separated solid particles are further dehydrated by another dryer. The recovered liquid is discharged, and the dried particles are discharged.

The dryer is actually a high-intensity fine-mesh shale shaker with a 10° inclined screen frame to reduce liquid loss. The screens used in the four shale shakers are three-dimensional fine-mesh wave-shaped screens, not traditional flat linear screens. The three-dimensional structure allows gravity to force incoming solids downward into the crevice and leave the raised area, separating solids from the upper part of each fold. This increases the amount of fluid passing through without submerging the raised part, while the raised part enhances fluid flow. Two layers of fine screens are attached to one layer of coarse screen, and the three layers of screens are bonded together in a corrugated shape, and then glued to the perforated plate. The combined waveform screen area is approximately 40% larger than that of a regular flat screen, with fineness approximately 2-3 times larger than that of a flat screen. It has a 70% increased fluid handling capacity and is less prone to blockage, providing excellent processing effects.

Development of domestic drilling fluid solid control equipment:

In recent years, there has been significant progress in the theoretical research and manufacturing process of domestic drilling fluid solid control equipment, especially in theoretical research on the working principles of vibrating screens and cyclones, which have reached or approached the world’s advanced level. However, there is still a gap between domestic solid control equipment and foreign equipment in terms of performance and lifespan, mainly due to the quality of materials, processing technology, processing accuracy, and the quality of commonly used equipment such as motors. High-pressure (withstanding 80MPa) and high-displacement (30L/s) solid control equipment are not yet available domestically. There are fewer types of shale shakers domestically, and efforts need to be made to accelerate the development of dry fine-mesh vibrating screens, track-mounted non-vibrating screen analysis equipment, environmentally friendly dedicated solid control equipment for offshore drilling, and versatile solid control supporting systems suitable for various working conditions to enrich the types of solid control equipment in China.

Tag: drilling fluid solid control equipment

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KOSUN Vertical Cuttings Dryer Application Introduction

The cuttings dryer as the drilling cuttings treatment equipment reduces the operator’s total drilling fluid cost and limits the amount of waste handled.

Recover drilling fluid directly from cuttings and mud from shaker mesh to avoid loss of weight mud due to shaker failure, rig movement, or screen blockage. And, the centrifuge helps meet certain cuttings liquid discharge requirements that must be complied with. Also, the vertical cuttings dryer is a continuous screen centrifuge with automatic feed control and is designed for solid-liquid separation. The vertical cuttings dryer for sale recovers the liquid phase drilling fluid from the cuttings by applying a high centrifugal acceleration force to the cuttings to improve the separation of liquid from the cuttings. In addition, the cuttings dryer can help save money on expensive drilling fluids by returning the expensive liquid phase in the mud system through further purification.

KOSUN drilling cuttings treatment system recovers beneficial mud and returns it to the in-service mud system. The vertical centrifuge works well for diesel, mineral oil, and synthetic oil-based mud. The drilling cuttings treatment system has a higher mud value. And the vertical centrifuge is a more critical piece of equipment in the mud treatment system, which also makes the vertical centrifuge more attractive from an economic and practical point of view. In addition, the vertical centrifuge reduces the amount of waste and disposal costs incurred at the rig site.

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Different from China, developed countries abroad have long realized that sludge treatment and disposal is an indispensable link in the process of sewage treatment.

Different from China, developed countries abroad have long realized that sludge treatment and disposal is an indispensable link in the process of sewage treatment. They have made clear provisions on the objectives of sludge treatment and disposal in terms of laws and policies, and ensured the implementation through a series of policies.

In sludge treatment of the United States, in addition to the treatment of generated sludge, the whole sewage treatment system and sludge treatment system are regarded as an organic whole. In sewage treatment, sludge co-treatment is realized. As early as 1998, the European Union legislated to ban the Marine discharge of sludge, and the sanitary landfill of sludge should be gradually banned. The annual sludge capacity of 50,000 sewage treatment plants in EU countries is 40 million tons, and more than 50% of the sludge has been treated with anaerobic digestion, among which the anaerobic digestibility of sludge in Britain reaches 66%.

It can be seen that policy and technology are still effective ways to improve China’s sewage treatment capacity. Technical methods: to further accelerate the localization of sludge treatment and disposal equipment, improve the management and operation level of sewage treatment plants. In terms of policy, effectively coordinate the management of sludge treatment and disposal involving multiple units; More binding mandatory sludge discharge standards; Actively support the development and application of new sludge treatment technology; To encourage investment in sludge treatment by water plants. 66%.