Baoji Dingding titanium | Petroleum Instrument titanium alloy protective cylinder inclinometer shell underground solid barrier

In the process of well logging and directional drilling in oil and gas exploration, the protective cylinder of Petroleum Instrument and the shell of inclinometer are "shield of protective core" - they need to withstand 150MPa high pressure, 480 ℃ high temperature, H ɑ s strong corrosion and drilling tool impact in 3000m deep wells at the same time, and their protective performance directly determines the instrument life and the integrity of exploration data. Relying on the material and precision processing advantages of "China Titanium Valley", Baoji Dingding titanium focuses on the research and development of titanium alloy shells for TC4, TC11 and TC18 petroleum instruments, strictly follows API 11d1 and ISO 13680 standards, and realizes the shell wall thickness tolerance ≤± 0.02mm and compressive strength ≥ 120MPa through the "integral forging+five axis milling" process, which is perfectly suitable for core equipment such as inclinometer while drilling, azimuth gamma ray instrument and imaging logging instrument.

1、 Core performance advantage: titanium alloy cracking the pain point of underground protection

TC4, TC11 and TC18 form a complementary performance system for the three major industry pain points of "high temperature deformation, corrosion perforation and impact damage" of the shell of petroleum instruments, achieving a qualitative breakthrough over stainless steel and alloy steel shells:

TC4 (balanced protection type)

Ti-6Al-4V composition, tensile strength ≥ 960mpa, thermal deformation under 400 ℃ high temperature ≤ 0.005mm, suitable for conventional well instruments within 2000m, 45% less weight than stainless steel shell, and 60% higher impact resistance.

TC11 (high temperature stable type)

With the addition of ti-6.5al-3.5mo, the temperature resistance is up to 500 ℃, and the high temperature creep rate at 480 ℃ is ≤ 0.001%/1000h. In the ultra deep well environment, the dimensional accuracy remains it5, and the weight is reduced by 50% compared with the high temperature alloy shell.

TC18 (sulfur resistant and corrosion resistant type)

The composition of ti-4.4al-4mo-2sn is optimized, the sulfur resistance grade reaches SSC C110, there is no stress corrosion under the environment of 0.3MPa partial pressure of H ɑ s, and the 5000 hour salt spray corrosion rate is ≤ 0.00008mm/year, which is the exclusive choice for high sulfur gas fields.

Common advantages

The density is only 4.51g/cm ³, and the density of the surface oxide film is 99.9%, which can resist the formation brine and CO ɑ corrosion; The whole forging has no welds to avoid stress concentration, and the downhole damage rate is reduced from 12% to 0.8%.

2、 Precise specification system: customized adaptation scheme according to instrument type

Combining the bearing requirements and installation dimensions of the protective cylinder and the instrument shell, matching the exclusive materials and precise specifications, to achieve the precise adaptation of "one instrument and one shell":

Customized service: it supports the processing of special-shaped shells (with cooling slots and mounting lugs) according to the 3D drawings of the instrument. TC11 can be stabilized at high temperature, and TC18 provides nitrided reinforced coatings; Reserve instrument interfaces and cable holes to achieve "ready to use"; The samples are completed within 8 days for urgent orders and delivered in batches within 30 days to meet the emergency repair needs of drilling projects.

3、 Core application scenario: full working condition coverage from land to deep sea

1. directional drilling: accurate protection of inclinometer shell

In directional drilling, the inclinometer needs to transmit the borehole trajectory data in real time, and the titanium alloy shell can realize double guarantee:

-TC4 inclinometer shell is used for shale gas horizontal wells. The roundness of φ 100mm specification is ≤ 0.005mm, which protects the accuracy of internal sensors, reduces the positioning error of wellbore trajectory from 5cm to 1cm, and improves the accuracy of reservoir hit by 90%;

-TC11 shell is suitable for Xinjiang 5000m ultra deep well inclinometer. The deformation of the shell at 480 ℃ is ≤ 0.005mm, avoiding squeezing the internal electronic components. The failure rate of the instrument is reduced from 15% to 1.2%;

-TC18 shell is used for inclinometer in Sichuan high sour gas field. It works continuously for 2000 hours without corrosion under the environment of 0.3MPa partial pressure of H ɑ s, and the success rate of data transmission has increased from 88% to 99.8%.

2. logging operation: extreme protection of instrument protection cylinder

The logging instrument needs to be stable in the complex downhole environment, and the titanium alloy protective cylinder creates a solid barrier:

-TC4 imaging logging tool protective casing is used for conventional oil and gas wells, with a wall thickness of 8mm, and can withstand 120MPa high pressure. Compared with the stainless steel protective casing, the weight is reduced by 45%, the load of downhole equipment is reduced, and the operation efficiency is improved by 20%;

-TC18 protective cylinder is suitable for sour oil and gas field logging tool, which is acid resistant and free of impurities, so as to avoid polluting the internal circuit of the tool, extend the tool maintenance cycle from 1 month to 6 months, and reduce the maintenance cost by 70%;

-TC11 protective cylinder is used for high temperature geothermal well logging tool. It works continuously at 450 ℃ for 1000 hours without aging, and its service life is 3 times longer than that of Superalloy protective cylinder.

3. deep sea exploration: pressure resistance and corrosion resistance of underwater instrument shell

In deep-sea oil and gas development, the instrument shell needs to resist high-pressure seawater corrosion, and titanium alloy components achieve long-term protection:

-The shell of TC18 deep-sea instrument is used for exploration equipment in the South China Sea at 1500m depth. The compressive strength of φ 200mm specification is ≥ 150MPa, and there is no corrosion after 5000 hours of seawater immersion. The continuous working stability of the instrument is 99.5%;

-TC4 micro sensor shell is used for underwater pressure monitoring instrument, with φ 30mm small size and lightweight characteristics, which is easy to install in a narrow space, and the error of pressure detection data is ≤ 0.05%.

4、 Whole process quality assurance: meet the stringent standards of the petroleum industry

1. traceability control of raw materials: high purity sponge titanium ≥ 99.8% is used. The content of Al (4.4%-5.7%) and Mo (4%-5.5%) is strictly controlled by TC18. Each batch of raw materials is attached with ICP-MS composition report and mine traceability to prevent impurities from affecting performance;

2. precision manufacturing process: the 2000 ton multi-directional fast forging machine realizes the overall forging (no hidden danger of weld), the positioning accuracy of the five axis milling center is ≤ 0.001mm, and the shell dimensional tolerance is stable within ± 0.02mm with the calibration of the laser interferometer; TC11 is additionally stabilized at 800 ℃ to eliminate internal stress;

3. full inspection and verification: all of them passed hydrostatic test (1.5 times the rated pressure), ultrasonic flaw detection (API class I, no internal defects), sulfur stress corrosion test (NACE TM0177 standard), high temperature creep test (TC11 exclusive), and a complete API compliance report was issued for each batch;

4. surface strengthening Customization: Nitriding coating (hardness up to hrc38, improving wear resistance by 3 times), anti-corrosion spraying, thread anti loosing treatment and other processes are provided as required to strengthen the adaptability of the shell under special working conditions.

Baoji Dingding titanium: the core supplier of titanium alloy shell for petroleum instruments

The company is located in Baoji high tech Zone, the "China Titanium Valley". It has been engaged in the processing of titanium alloy shells for petroleum instruments for 12 years. It has 3 special production lines with an annual production capacity of 300 tons. It has passed the ISO9001 quality management system, API 11d1 certification and the qualification review of PetroChina and Sinopec suppliers. With the ability of "material customization+overall forging+rapid delivery", the products have been applied to key projects such as Sichuan Chongqing shale gas field, South China Sea deep sea exploration, Xinjiang ultra deep well, etc., serving well-known enterprises such as COSL and Schlumberger, and becoming a trusted partner of instrument manufacturers.

Technical core: TC18 sulfur resistant molding/tc11 high temperature stabilization

Capacity Guarantee: 300 tons/year, 30 days batch delivery for urgent orders

Service advantage: 24-hour working condition adaptation technical support

Technical consultation: send the instrument model+working condition parameters to 530975155@@qq.com, and obtain the preliminary adaptation scheme within 2 hours