SJAT II Cement Bond Combination Tool

Features 1. The tool consists of three parts, that is, CCL (casing collar locator), natural gamma ray tool and dual-transmitter-three-receiver sonic cement bond tool. 2. The three types of logging signals (CCL signal, gamma signal and cement bond acoustic signal) acquired by the combination tool will be transmitted to the surface logging system via the mono-conductor cable. 3. High voltage, low current and little signal attenuation. 4. Multiple curves such as natural gamma, CCL, 2.5-inch sound amplitude and time difference, 3.5-inch sound amplitude and time difference, bond index, and variable density can be obtained. 5. The tool is characterized by multiple parameters, high self-compensation capability, accurate measuring and high success rate of logging.Technical Specifications: 1. Maximum working pressure---------------70Mpa 2. Maximum working temperature-------------150 3. OD--------------------------------------2-3/4"(Φ70mm) 4. Working voltage (at the cable gland)----------------110VDC 5. Working current: CCL/remote sensing cylinder------------30mA Natural gamma ray tool-------------------33mA Sonic cement bond tool------------- 42mA 6. Logging Speed: ≤700m/h recommended speed:600m/h 7. Natural gamma background counts:≥160cps 8. Gamma error band of ebb and flow: ≤7% 9. Length: Upper Centralizer--------------------------79cm CCL/ remote sensing cylinder------------104cm Natural gamma ray tool----------------------------145cm Sonic cement bond tool ----------------------280cm Lower centralizer -------------------------------79cm 10. Zero Length (from the bottom of the tool): Casing collar locator/remote sensing cylinder: 79cm Natural Gamma ray tool: 114cm 11. Sonic cement bond tool: Range1 (X1---R1): 160cm Range 2(X1---R2): 145cm Range 3(X2---R1): 69cm Range 4(X2---R2): 53cm Variable density or XY recording: 122cm 12. Weight: Upper centralizer: 6.8Kg Casing collar locator/remote sensing cylinder: 18Kg Natural Gamma ray tool: 26Kg 13. Sonic cement bond tool: 39Kg 14. Lower centralizer: 6.8Kg