The rotary drill hoses are used for several construction activities. This tool is recommended for fracturing, cementing and other oil-field services. This item is also called as Kelly hose or mud hose.
It works to conduct fluid from the standpipe or mud pump. The extracted fluids are directed to the Kelly and swivel. This hose is classified under the high-pressure drilling hose category.
The term rotary refers to its capacity to rotate and drill on the mud to extract oils.
Basic Components of the Rotary Drill Hose
This tool has several parts with its distinctive purposes and features. Basically, this item is manufactured for oil companies. It has several classifications (grades), which are based on the tool’s capacity (tolerance level) towards the maximum working pressure. Below are the parts of the drill hose:
1. Hose tube. This tube works as a pathway for the extraction of oil and other fluids. It is coated and compounded with oil-resistant materials. The tube is designed with ozone-free applications. Other materials used for the tube are made to be alkali and acid resistant.
2. Hose wire. This wire is made of zinc-resistant steel. It is considered as a reinforcing part of the hose. It works to secure the hose tube. The wire is designed to be universally compatible with different types of hose tubes.
Different Rotary Hose Drill Grades and Classifications
This hose-type tool has various classifications. These classifications are based on the maximum tolerance of the tool towards the working pressure. It has 5 categories (Grade A — E), which are based on different ranges of proof pressure. Below are the detail explanations of this tool according to its classifications:
1. Grade A has a maximum working pressure of 103. Its proof pressure is 206.
2. Grade B has a maximum working pressure of 138 and its corresponding proof pressure is 276.
3. Grade C has a maximum working pressure of 276 with a proof pressure of 552.
4. Grade D has a proof pressure of 690 and maximum working pressure of 345.
5. Grade E works with a maximum pressure of 517 along with proof pressure of 1,034.
Every corresponding number of pressures are based and computed according to “bar a”. 1 bar a is equivalent to 0.1 MPa.
Bend Radius and Internal Diameter of Rotary Drill Hose
Aside from its classifications, this tool has various capacity levels in terms of internal diameter and bent radius. The output of this tool will depend on its specifications. Below is the list of the tool’s capacity level according to internal diameter and bend radius.
1. Internal diameter of 102 is inclusive for hose (with Grade C, D, and E). It has a minimum bend radius of 1,5 meter.
2. Internal diameter of 89 is inclusive for hose (with Grade C, D, and E). It has a minimum bend radius of 1,4 meter.
3. Internal diameter of 76 is inclusive for hose (with Grade C, D, and E). It has a minimum bend radius of 1,2 meter.
4. Internal diameter of 63 is inclusive to all grades of hose. It has a minimum bend radius of 1,2 meter.
5. Internal diameter of 51 is inclusive for hose (with Grade A, B, and C). It has a minimum bend radius of 1,0 meter.
As a summary, this tool is used to efficiently drill oil. It delivers a maximum pressure air and water. It is also used to extract oil in the wharves or ports. It is designed to accommodate high level of pressure with bearable distortion and anti-fatigue features.