China MT-TC Series Crown Block for Drilling Rigs Manufacturer, Factories

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China MT-TC Series Crown Block for Drilling Rigs Manufacturer, Factories

The MT-TC series crown block, designed and manufactured by MTPM, is a critical equipment of the hoisting system used in oil and gas drilling rigs. It is engineered to handle heavy hook loads with stability and efficiency, providing safe and reliable lifting performance during drilling and well-servicing operations. The crown block is mounted at the top of the derrick or mast and works in conjunction with the traveling block to support the drill string and other hoisting activities. With robust construction, precise machining, and strict quality control, the MT-TC crown block delivers dependable service in both onshore and offshore drilling rigs.

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Product Description

Product Specifications

Model		MTTC90	MTTC170	MTTC225	MTTC315	MTTC450
Max. hook load (kN)		900	1700	2250	3150	4500
Diameter of wire line (mm)		26	29	32	35	38
O.D. of sheaves mm(in)		762(30")	1005(40")	1120(44")	1270(50")	1524(60")
Number of sheaves		5	6	6	7	7
Overall dimension (mm)	Length	2317	2668	2668	3192	3410
	Width	2076	2460	2709	2783	2753
	Height	1577	1855	2469	2350	2420
Weight (KGS)		2668	4540	6500	8500	11105

• Third party witness and inspection report available: Bureau Veritas (BV), CCS, ABS, SJS etc.

Compliance and Reliability

All MT-TC crown blocks are manufactured in full accordance with API Spec 4F (for drilling structures) and API Spec 8C (for drilling and production hoisting equipment). They also comply with the requirements of the industry standard SY/T 5527, ensuring safety and consistency with international regulations.

Each sheave in the crown block is individually certified to API Spec 8C(8C-0349), ensuring verified quality and performance under rated loads. To guarantee long service life, the sheave grooves are subjected to quenching and surface hardening treatments, which greatly improve wear resistance and minimize deformation under heavy loads.

Each unit is inspected and tested to meet international safety requirements, offering drilling contractors a product that is both trustworthy and cost-efficient in long-term operation.

Product Features

The crown block is equipped with wireline guide rods and rope retention plates, which effectively prevent the drilling line from jumping out of the sheave groove or slipping under dynamic loads.

A safety chain protector is installed to enhance operational security, while an integrated maintenance gantry provides convenient access for sheave inspection and repair.

Depending on drilling contractor requirements, optional bailing pulleys and auxiliary pulley assemblies can be supplied to expand the application range.

The product design allows the crown block sheaves to be interchangeable with those of the traveling block when sharing the same hook load rating, simplifying maintenance.

Engineered for drilling rig hoisting systems, combining durability, safety, and compliance with API and Chinese standards.

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Frequently Asked Questions

What international standards do these crown blocks meet?

The crown blocks are manufactured in strict accordance with API Spec 4F and API Spec 8C, as well as the Chinese industry standard SY/T 5527.

How is the durability of the sheaves ensured?

The sheave grooves undergo quenching and surface hardening treatments to significantly enhance wear resistance and prevent deformation under heavy loads.

Are the sheaves interchangeable with other equipment?

Yes, the sheaves are designed to be interchangeable with those of the traveling block when they share the same hook load rating, which helps reduce spare parts inventory.

What safety measures prevent the wireline from slipping?

Each unit is equipped with wireline guide rods and rope retention plates to prevent the drilling line from jumping out or slipping during operation.

Is third-party inspection available for these products?

Yes, inspection reports and witness certifications from third parties like Bureau Veritas (BV), CCS, ABS, and SJS are available upon request.

Is there a provision for easy maintenance of the sheaves?

Yes, an integrated maintenance gantry is installed to provide convenient and safe access for regular inspection and repair tasks.